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Dielectric Phase Transition Induced by Halogen Substitution Based on 1, 4-Diazabicyclo[2.2.2]octane-Derivatives
Sai-Nan CHENG, Kun DING, Shuang-Teng SONG, Tie ZHANG, Zhi-Xu ZHANG, Yi ZHANG, Da-Wei FU
2021, 37(6): 961-967  doi: 10.11862/CJIC.2021.130
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We successfully synthesized (X-EtHDabco)[ZnBr4] (X=H, F, Cl for compound 1, 2, and 3, EtDabco=N-ethyl-1, 4-diazoniabicyclo[2.2.2]octane) through precise molecular design. Systematic measurements (powder X-ray diffraction, differential scanning calorimetry measurements, dielectric measurements) were performed on these compounds. It is noteworthy that, no hint of heat anomaly was observed for 1, while both 2 and 3 displayed intriguing isostructural order-disorder phase transition near 230 K. Through the analysis of the crystal structure, the order-disorder transformation of organic ammonium plays a major role in the phase transition, in addition, the displacement of the inorganic framework also contributes to dielectric response.
不同晶體生長活化能對SrZrO3: Ce發光性能及微觀組織影響
馬瀾, 齊鵬遠, 馬雷, 戴時雨, 徐曉辰, 劉楊
2021, 37(6): 968-976  doi: 10.11862/CJIC.2021.123
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以不同沉淀劑的反向共沉淀法制備了SrZrO3:Ce納米粒子;采用X射線衍射(XRD)、掃描電鏡(SEM)、熱重-差熱分析(TG-DTA)測試方法,對樣品物相、形貌、發光強度及燒結致密化進行了分析,討論了不同前驅體的熱分析動力學。結果表明:用單相和復相沉淀劑制備的前驅體在1 000℃煅燒2 h分別獲得分散性良好的棱柱形和近球形SrZrO3:Ce粒子,粒徑約80和60 nm。利用Doyle-Ozawa積分法和Kissinger微分法分別求出用單相和復相沉淀劑制備的前驅體在不同反應階段的表觀活化能平均值為94.18、69.39、255.72 kJ·mol-1和90.46、51.03、232.35 kJ·mol-1,晶體生長活化能為E單相=27.97 kJ·mol-1E復相=22.53 kJ·mol-1,后者的表觀活化能和晶體生長活化能都小于前者,表明復合沉淀劑的引入降低了合成能量,提高了粒子活性,所制備樣品的發光強度明顯優于用單相沉淀劑制備的樣品,經1 760℃真空燒結保溫4 h后用復相沉淀劑制備的樣品的晶粒尺寸均一并達到了致密化。
炭球修飾g-C3N4材料的制備及其可見光光催化性能
郭永平, 桂明生, 周金龍, 楊麗
2021, 37(6): 977-983  doi: 10.11862/CJIC.2021.128
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利用水熱法以葡萄糖和氮化碳(g-C3N4)為原料,成功地制備了炭球修飾氮化碳(C/g-C3N4)復合型光催化劑。通過X射線粉末衍射、掃描電鏡、N2吸附-脫附、紫外可見漫反射、表面光電壓和電子順磁共振分別對樣品的結構、組成、形貌、比表面積和光學性能進行了表征。結果顯示:直徑約20 nm的炭球緊密地排列于g-C3N4表層,當葡萄糖與g-C3N4用量比(質量分數)為1%時,復合催化劑1% C/g-C3N4的光催化性能最好。C/g-C3N4與單一g-C3N4相比,不僅比表面積明顯增大,還擴展了可見光的響應范圍,且提高了催化劑光生電子與空穴的分離效率。在400 W金鹵燈照射下,光線通過420 nm濾光片后,在80 min內1% C/g-C3N4對10 μmol·L-1的羅丹明B降解率高達87%,是純g-C3N4在同樣條件下催化性能的3倍,且穩定性良好。
Er3+摻雜Li2O-SrO-ZnO-Bi2O3玻璃中Er3+離子在1.53 μm處的熒光發射特性
張寧, 林志文, 滿石清
2021, 37(6): 984-988  doi: 10.11862/CJIC.2021.131
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采用傳統的熔融法制備了Er3+摻雜的新型鉍酸鹽玻璃(Li2O-SrO-ZnO-Bi2O3,LSZB),并對其光譜性質進行了表征,分析了玻璃的拉曼光譜、吸收光譜、熒光光譜,利用Judd-Ofelt理論研究了其熒光特性。LSZB玻璃樣品中Er3+4I13/24I15/2躍遷發射峰位于1.53 μm處,半高寬約為78 nm。樣品中Er3+4I13/2能級壽命為2.848 ms,量子效率為99.93%,受激發射截面達到9.76×10-21 cm2。以上結果顯示,Er3+摻雜LSZB玻璃有良好的光譜特性。
3-((5-(3-吡啶基)-2-(1, 3, 4-噁二唑基))硫代)-2, 4-戊二酮Cu(Ⅱ)/Zn(Ⅱ)/Mn(Ⅱ)配合物的合成及其晶體結構
張奇龍, 孫樂濤, 楊先炯, 徐紅, 李立郎, 楊小生
2021, 37(6): 989-994  doi: 10.11862/CJIC.2021.134
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將配體3-((5-(3-吡啶基)-2-(1,3,4-噁二唑基))硫代)-2,4-戊二酮(HL)與Cu(OAc)2·H2O、Zn(OAc)2·2H2O和Mn(OAc)2·4H2O分別進行配位反應,得到3個配位聚合物{[Cu2(L)4]·CHCl3}n1)、{[Zn(L)2]·4CHCl3}n2)和{[Mn(L)2]·4CHCl3}n3),并通過元素分析、紅外光譜、粉末X射線衍射、單晶X射線衍射等對配合物的結構進行了表征。在固體狀態下,配位聚合物1形成1D螺旋鏈狀結構,配位聚合物23形成2D網狀結構。
碳點-二氧化錳納米復合材料的制備及硫普羅寧的熒光傳感
王琦, 司亞鑫, 楊田, 高熒羲, 高曉鋒, 朱彬, 馬春蕾
2021, 37(6): 995-1003  doi: 10.11862/CJIC.2021.107
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以聚烯丙胺鹽酸鹽為反應底物,通過一步水熱法制備了熒光碳點(CDs)并在其中引入高錳酸鉀,通過原位的氧化還原反應制備了CDs-MnO2納米復合材料。通過透射電子顯微鏡、X射線光電子能譜、納米粒度分析、紫外-可見吸收光譜、熒光光譜、熒光壽命對其進行了形貌、結構、成分、發光性能的表征。結果表明,MnO2通過靜態猝滅效應(SQE)和內濾效應(IFE)猝滅了CDs的熒光。進一步,由于硫普羅寧(TPN)分子中的活性巰基與MnO2的特異性反應使得MnO2降解,猝滅劑消失,進而使得熒光恢復?;诖?,我們建立了基于CDs-MnO2的熒光傳感模式來測定TPN的新方法,該方法對TPN表現出良好的靈敏度和選擇性,線性范圍為0.2~80 μmol·L-1,檢出限為0.11 μmol·L-1。該MnO2納米材料調控的熒光檢測法用于尿液樣品的測定,回收率為97.57%~102.58%。
KIT-6負載CeO2催化CO2和甲醇合成碳酸二甲酯
史亞卜, 張國強, 孫宇辰, 鄭華艷, 李忠, 上官炬, 米杰, 劉守軍, 史鵬政
2021, 37(6): 1004-1016  doi: 10.11862/CJIC.2021.129
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采用不同老化溫度(80、100、120和150℃)合成了一系列KIT-6載體,并通過浸漬法制備了相應的CeO2/KIT-6催化劑。結合X射線衍射、N2物理吸附、NH3程序升溫脫附、CO2程序升溫脫附、透射電子顯微鏡、傅里葉變換紅外光譜和X射線光電子能譜等表征結果,詳細考察了老化溫度對KIT-6結構以及CeO2/KIT-6催化劑直接催化CO2和甲醇合成碳酸二甲酯(DMC)反應活性的影響。結果表明,不同老化溫度下制備的KIT-6均保持其獨特的三維孔道結構。隨著老化溫度升高,KIT-6比表面積先增大后減小,當老化溫度為100℃時,KIT-6比表面積達到最大(683 m2·g-1)。KIT-6較高的比表面積有利于提高CeO2分散度,進而提高暴露的活性位點數量,催化活性隨催化劑表面中等堿/酸性吸附位數量和Ce3+含量的增加而逐漸提高。其中,CeO2/100-KIT-6催化劑中CeO2顆粒尺寸最?。?.9 nm),暴露的活性位數量最高,催化活性最佳。隨后,考察了反應溫度和壓力對CeO2/100-KIT-6催化活性的影響。隨著反應溫度提高,催化活性先升高后降低,當反應溫度為140℃時,催化活性最高;且催化活性隨反應壓力的提高而逐漸增加。在反應溫度為140℃、壓力為6.8 MPa條件下,催化劑經6次循環后,DMC收率由15 mmol·gCeO2-1逐漸降低至2.8 mmol·gCeO2-1,原因歸結為反應過程中CeO2納米顆粒發生團聚,使暴露出的活性位數量減少。
用于高性能超級電容器的氮摻雜碳納米網的制備
楊磊, 武婷婷, 李宏強, 金碧玉, 何孝軍
2021, 37(6): 1017-1026  doi: 10.11862/CJIC.2021.118
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以菲為碳源、氨氣為氮源,通過一步碳化、活化法成功制得了氮摻雜碳納米網(NCNs)。在800℃下制得的樣品(NCN800)具有獨特的網狀結構、大的比表面積(1 567 m2·g-1)和高的原子百分含量(N 4.41%、O 13.71%)。歸因于這些結構特征,工作電極NCN800在三電極系統中顯示出高的比電容(0.05 A·g-1電流密度下比電容為542.3 F·g-1)。此外,用于對稱超級電容器的NCN800電極展現了高的比電容(0.05 A·g-1電流密度下比電容為443.6 F·g-1)、良好的倍率性能(20 A·g-1電流密度下比電容為341.2 F·g-1)以及優異的循環穩定性(經過30 000次循環后比電容保持率為93.5%)。
Tm3+-Tb3+-Eu3+共摻含Na3Gd(PO4)2晶相熒光玻璃陶瓷的制備及發光性能
陳曦, 張洪波, 賈文韜, 夏宇行, 蘇春輝
2021, 37(6): 1027-1036  doi: 10.11862/CJIC.2021.115
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采用熔融晶化法制備Tm3+-Tb3+-Eu3+摻雜含Na3Gd(PO42晶相熒光玻璃陶瓷,并對其光學性能進行了研究。利用差示掃描量熱分析(DSC)、X射線衍射(XRD)、掃描電子顯微鏡(SEM)等測試,確定了樣品的晶相結構和最佳熱處理條件(740℃/3 h)。在359 nm激發下,Tm2O3、Tb4O7、Eu2O3摻雜濃度(物質的量分數)分別為0.2%、0.2%、0.95%時,玻璃陶瓷的色度坐標為(0.333 2,0.318 8),接近標準白光(0.333,0.333)。結合熒光光譜和熒光衰減曲線分析,證實了樣品中存在Tm3+→Eu3+、Tb3+→Eu3+的能量傳遞。
鐵基普魯士藍正極材料的宏量制備及電化學儲鈉性能
孫瑜, 孫云坡, 劉春麗, 謝健, 趙新兵, 裘呂超, 梅簡, 徐雄文, 涂健
2021, 37(6): 1037-1045  doi: 10.11862/CJIC.2021.116
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以檸檬酸鈉作為配位劑,采用共沉淀法,在室溫下制備了鐵基普魯士藍材料(FePB)。當使用20 L容積的反應釜,并將前驅體亞鐵氰化鈉(Na4[Fe(CN)6])的濃度提高至0.5 mol·L-1時,制備一次可實現高達500 g的產量。電化學測試顯示,所得FePB材料具有較高的容量、優異的倍率性能和良好的循環壽命。在0.1C時,該材料首次放電比容量可達到117 mAh·g-1,在10C的大電流密度下,比容量仍可保持在92 mAh·g-1。在1C電流密度下,經過500次循環,比容量仍保持在87 mAh·g-1,容量保持率達到89%。以商業硬碳為負極,以FePB為正極,制作了軟包鈉離子全電池。該軟包電池在50 mA的電流下,經過400次循環可實現75%的容量保持率。FePB材料優異的電化學性能與其較高的鈉含量、低的缺陷、多邊界的微觀結構以及普魯士藍類材料獨特的開放框架結構有關。
摻F影響LiNi0.8Co0.1Mn0.1O2結構和性能的微觀機制
任明明, 劉澤萍, 袁振洛, 王洋, 范廣新, 劉寶忠, 羅成果
2021, 37(6): 1046-1054  doi: 10.11862/CJIC.2021.120
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以氟化鋰為氟源,通過高溫固相法合成了F摻雜的LiNi0.8Co0.1Mn0.1O2。采用X射線衍射儀(XRD)、掃描電鏡(SEM)、X射線光電子能譜(XPS)和電化學測試等手段研究F影響LiNi0.8Co0.1Mn0.1O2結構和性能的微觀機制。結果表明:適量F摻雜可以提高正極材料的放電比容量,改善其倍率性、循環性和熱穩定性。當F摻雜量(物質的量分數)為1.5%時,材料的綜合電化學性能最優,初始放電比容量(0.2C)和50周循環容量保持率(1C)分別由原始的174.0 mAh·g-1(78.7%)提高到178.6 mAh·g-1(85.7%)。LiNi0.8Co0.1Mn0.1O2材料性能的改善可歸因于F能夠增強過渡金屬層、鋰層與氧層之間的結合力,提高材料的結構穩定性。此外,F摻雜還有利于降低電化學反應中的界面電阻和電荷轉移阻抗。
MOF衍生的Zn/N共摻雜碳催化劑的制備及其電催化性能
白亞峰, 楊子恒, 馮勇, 劉富亮, 陳曉濤, 常繼瑩
2021, 37(6): 1055-1061  doi: 10.11862/CJIC.2021.122
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氮摻雜碳載非貴金屬氧還原反應(ORR)催化劑已被廣泛研究,以解決燃料電池Pt基催化劑的高成本問題。通過溶劑熱法制備了無定形Zn基金屬有機框架,并進一步經熱處理得到Zn/N共摻雜碳催化劑。測試表明ZnN/C-900催化劑(熱處理溫度為900℃)具有形貌均一的球形特征且比表面積高達961 m2·g-1,N、Zn的原子含量分別為1.6%、5.87%。ZnN/C-900催化劑表現出較高的ORR催化活性及穩定性,在堿性介質中,ZnN/C-900催化劑的起始電位、半波電位和極限電流密度分別為0.955 V、0.855 V和7.10 mA·cm-2,在酸性介質中,ZnN/C-900的起始電位、半波電位和極限電流密度分別為0.882 V、0.649 V和6.01 mA·cm-2,且具有較高的穩定性和抗甲醇中毒性能。
高性能NiCoP基超級電容器電化學性能
董永光, 李生娟, 羅意, 姚遠, 魯成龍, 楊俊和
2021, 37(6): 1062-1070  doi: 10.11862/CJIC.2021.138
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采用水熱和低溫磷化反應兩步法,在無添加沉淀劑條件下成功在泡沫鎳上合成納米花狀鎳鈷磷化物(NiCoP/NF)。研究結果表明,鎳/鈷元素物質的量之比為1:1時,在1 A·g-1電流密度下,Ni1/2Co1/2P/NF的比容量高達1 276.36 F·g-1,在10 A·g-1電流密度下充放電循環3 000次后,比容量保持率為78.23%。此外,以Ni1/2Co1/2P/NF為正極,活性炭(AC)為負極組裝的非對稱超級電容器(Ni1/2Co1/2P/NF//AC/NF)在725 W·kg-1的功率密度下,能量密度高達36.25 Wh·kg-1。
基于香豆素-肟的次氯酸根探針的設計、合成及熒光成像應用
張晶晶, 嚴鳴, 盧雯, 徐莉, 王小青
2021, 37(6): 1071-1079  doi: 10.11862/CJIC.2021.133
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通過將香豆素的2-位內酯轉化為肟基,設計、合成了一種用于基于香豆素-肟類的次氯酸根熒光探針Cou-HC。Cou-HC不僅對次氯酸根表現出快速和高選擇性響應的特點,而且探針氧化后的產物不會與生物硫醇等發生反應,從而可以避免生物硫醇對于次氯酸根響應的干擾。細胞成像實驗結果表明,探針可以對RAW 264.7細胞中內源性和外源性次氯酸根進行實時成像,初步證明了該探針對生命體系內次氯酸根檢測的能力。
磁性Fe3O4負載Schiff堿材料的合成及其吸附Cu(Ⅱ)、Pb(Ⅱ)和Cd(Ⅱ)的性能
賈東旭, 黃湘湘, 胡椿奎, 費靈燕, 尤浪浪, 呂春欣, 鐘偉
2021, 37(6): 1080-1088  doi: 10.11862/CJIC.2021.117
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摘要:
分別采用均相法和異相法,將SiO2包裹的Fe3O4與三乙氧基氨丙基硅烷和水楊醛及其衍生物反應,合成了一系列磁性Fe3O4負載Schiff堿的吸附材料,并通過紅外光譜(IR)、X射線衍射(XRD)、掃描電鏡(SEM)等方法對制備的材料進行了全面表征。同時對這類材料在30℃時對水體中的Cu(Ⅱ)、Pb(Ⅱ)和Cd(Ⅱ)的吸附性能進行了研究,考察了合成方法、pH、離子濃度、材料結構等因素對吸附性能的影響,并研究了吸附材料的再生性能。研究結果表明,這類材料對Cu(Ⅱ)、Pb(Ⅱ)和Cd(Ⅱ)三種金屬離子都表現出良好的吸附性能,在pH=1~6范圍內,隨著pH值的升高吸附量增加。相比較而言,異相法制備的吸附材料的吸附性能優于均相法,而Schiff堿上含有給電子基團的材料的吸附性能比其他基團更優異。這類吸附材料表現出優異的再生性能,經過4次循環后再生率為89.4%。
熒光猝滅型硼氟二吡咯類Cu2+探針的合成及其生物細胞成像的應用
邊永軍, 渠星宇, 李芬芳, 張政委, 李建晴, 陳勇強, 沈珍
2021, 37(6): 1089-1096  doi: 10.11862/CJIC.2021.127
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摘要:
設計合成了一個反應型的硼氟二吡咯(BODIPY)類熒光探針1,該探針以吡啶-2-羧酸苯酚酯基為識別基團。通過1H NMR、13C NMR和HRMS表征了1的結構,并解析了其晶體結構。光譜分析實驗結果顯示,探針1具有高的熒光量子產率(0.79),對Cu2+具有較強的選擇性識別性能,并能成功應用到生物細胞中Cu2+的成像檢測。
添加叔丁醇鉀對Mg(NH2)2-2LiH體系儲氫性能的影響
馮文欽, 李超, 劉凱元, 蔡明源, 范美強
2021, 37(6): 1097-1105  doi: 10.11862/CJIC.2021.142
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摘要:
叔丁醇鉀(C4H9OK)的添加顯著改善了Mg(NH22-2LiH體系的儲氫性能。添加0.08 mol C4H9OK的Mg(NH22-2LiH-0.08C4H9OK樣品表現出最佳儲氫性能。該樣品的起始放氫溫度僅為70℃,較Mg(NH22-2LiH原始樣品降低了60℃;130℃完全放氫后,該樣品可在50℃開始吸氫,較原始樣品降低了50℃。Mg(NH22-2LiH-0.08C4H9OK樣品可在150℃的等溫條件下50min內迅速放出質量分數3.82%的氫氣,完全放氫后可在120℃的等溫條件下50 min內快速吸收質量分數4.11%的氫氣,表現出良好的吸放氫動力學性能。C4H9OK的添加降低了樣品放氫反應的表觀活化能和反應焓變,改善了放氫反應的動力學和熱力學性能,從而降低了放氫反應溫度。進一步的放氫反應機理研究發現,在180℃之前,C4H9OK對Mg(NH22-2LiH體系的放氫起催化改性作用;溫度繼續升高后,C4H9OK將會分解并參與放氫反應最終生成Li3K(NH24。
Synthesis, Characterization, and X-ray Crystal Structure Analysis of Cu(Ⅰ)/Cu(Ⅱ) Complexes of Phenanthridine and Triphenylphosphine
Hikmat Ali Mohamad, Karwan Omer Ali, Eric Hosten, Thomas Gerber
2021, 37(6): 1106-1112  doi: 10.11862/CJIC.2021.114
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摘要:
Two new complexes of copper(Ⅰ) and copper(Ⅱ) with phenanthridine (Phend) of the following composition : [Cu(κ1-Phend)2Cl2] (1) and [Cu2(κ1-Phend)2(κ1-PPh3)2(μ-Cl)2] (2) have been prepared in the presence of triphenylphosphine (PPh3) as a co-ligand. The structures of these complexes have been investigated by elemental analysis, molar conductivity, FT-IR, UV-Vis, and single-crystal X-ray diffraction. X-ray diffraction analysis of typical complex 1 reveals the distorted square planar geometry around copper(Ⅱ) whereas the binuclear complex 2 was irregular tetrahedral geometry around Cu (Ⅰ) center containing bridge Cl- ion. The FT-IR spectra, elemental analysis as well as UV-Vis spectra confirmed their components, geometries, and ligand interactions. The structures of both complexes have been optimized by density-functional theory (DFT) calculations to explain the electronic spectral properties. CCDC: 1983822, 1; 1983821, 2.
Self-Assembled Zn2+, Co2+ and Ni2+ Complexes Based on Coumarin Schiff Base Ligands: Synthesis, Crystal Structure and Spectral Properties
Geng GUO, Juan LI, Ya WU, Wen-Min DING, Shu-Zhen ZHANG, Yin-Xia SUN
2021, 37(6): 1113-1124  doi: 10.11862/CJIC.2021.124
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摘要:
Mononuclear Zn2+, Co2+ complexes and binuclear Ni2+ complex based on coumarin Schiff base ligands, [Zn(L1)2] (1) (HL1=6-((4-diethylamino-2-hydroxy-benzylidene)-amino)-benzopyran-2-one), [Co(L2)2] (2) (HL2=6-((4-methoxy-2-hydroxy-benzylidene)-amino)-benzopyran-2-one) and[Ni2(L3)2(CH3OH)4] (3) (H2L3=4-hydroxy-3-((4-methoxy-2-hydroxy-benzylidene)-amino)-benzopyran-2-one), were synthesized and characterized by elemental analysis, IR, UV-Vis, fluorescence spectra and X-ray single crystal diffraction analysis. The crystal structure analysis represents that the complexes 1 and 2 possess mononuclear structure composed of one metal ion (Zn2+ or Co2+) and two ligand units ((L1)- or (L2)-). Whereas complex 3 had binuclear structure, containing two Ni2+ ions, two ligand units (L3)2- and four coordination methanol molecules. The crystals of complexes 1, 2 and 3 are solved as monoclinic space group C2/c, triclinic space group P1 and triclinic space group P21/n, respectively. The spatial configurations of the central metal Zn2+ and Co2+ ions are four-coordinated tetrahedrons, and the Ni2+ ion is six-coordinated twisted octahedrons. In addition, UV-Vis studies demonstrate that the free ligands HL1 in DMF/H2O (4:1, V/V) solution and HL2 in DMSO/H2O (4:1, V/V) solution could selectively recognize Hg2+ and Zn2+, respectively. The detection limits were calculated to be 7.45 and 6.10 μmol·L-1, respectively. Fluorescence studies indicate that HL2 exhibits ability of selective recognition Zn2+ against other common cationic including Ag+, Ba2+, Ca2+, Cd2+, Cr3+, Cu2+, Fe3+, Mg2+, Mn2+ and Hg2+ in DMSO/H2O (4:1, V/V), and the detection limit was calculated to be 2.91 μmol·L-1.
Scale-Up Strategy to Develop Highly-Effective Co-N-C@KB Composites as Sulfur Host for Lithium-Sulfur Battery
Xiao-Xiang LU, Tian-Bao LI, Fei-Yue TU, Zhong-Liang LI, Xu-Kun ZHU, Can SUN, Ya-Chao JIN, Li SONG, Ming-Dao ZHANG, Hui CAO
2021, 37(6): 1125-1134  doi: 10.11862/CJIC.2021.105
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摘要:
The commercialization process of Li-S battery is seriously impeded by the poor performance of sulfur cathode, including the low conductivity and dissatisfactory activity for facilitating the polysulfide conversion. In this work, we developed a scale-up method to synthesize an efficient cathode material (Co-N-C@KB) with abundant Co-N-C active sites on the Ketjen Black (KB), through a ligand-mediated-synthesis and a low-temperature-pyrolysis strategy. The uniformly distributed Co-N-C active sites were proved to be favorable for the conversion of polysulfide at the cathode, hence improving the capacity and cyclic life of Li-S battery. As a result, the Co-N-C@KB cathode for the Li-S battery could deliver an initial discharge specific capacity as high as 1 442 mAh·g-1, and have the excellent capability for capacity retention during the long-term stability test.
Syntheses, Crystal Structures, Luminescence and Catalytic Activity of Manganese(Ⅱ) and Cadmium(Ⅱ) Coordination Polymers Based on 2, 3-Dihydroxy-terephthalic Acid
Yu LI, Ying-Fen ZHUANG, Yan-Lai ZHANG, An-Sheng FENG, Xun-Zhong ZOU
2021, 37(6): 1135-1142  doi: 10.11862/CJIC.2021.132
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摘要:
Two 3D manganese(Ⅱ) and cadmium(Ⅱ) coordination polymers, namely[M(μ4-H2DTA)(bipy)]n (M=Mn (1), Cd (2)), have been constructed hydrothermally using H4DTA (H4DTA=2, 3-dihydroxy-terephthalic acid), bipy (bipy=2, 2'-bipyridine), and manganese or cadmium chlorides. Single-crystal X-ray diffraction analyses reveal that two complexes are isostructural and crystallize in the orthorhombic system, space groups Pnna. Both complexes disclose a 3D metal-organic framework. The luminescent and catalytic properties of two complexes were investigated. Complex 1 exhibited good catalytic performance for the cyanosilylation reaction. CCDC: 2060258, 1; 2060259, 2.
Synthesis and Characterization of Palladium Nanoparticles with High Proportion of Exposed (111) Facet for Hydrogenation Performance
Yu LI, Ying-Fen ZHUANG, Yan-Lai ZHANG, An-Sheng FENG, Xun-Zhong ZOU
2021, 37(6): 1143-1151  doi: 10.11862/CJIC.2021.095
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摘要:
Pd nanoparticles with different (111) facet proportions were prepared at by a liquid phase hydrogen reduction method, then preparing corresponding Pd/C catalysts. The results of transmission electron microscopy (TEM), fast Fourie transition (FFT), and X-ray diffraction (XRD) revealed that the proportion of the (111) facets on the Pd surface was higher at lower temperatures. Hydrogen oxygen pulse titration (H2-O2) and H2-temperature programmed desorption (H2-TPD) showed that the hydrogen adsorption volume of Pd/C catalysts was correlated linearly with the Pd(111) facet proportions. All Pd/C catalysts had an average particle size of 4.3 nm with narrow particle size distribution, which could eliminated the effect of particle size. The similar pore parameters and Pd loading of all catalysts allowed the reasonable comparison for Pd(111) facet proportions influenced the hydrogenation performance in three typical reactions. Moreover, linear correlations were found between the H2 consumption rate with Pd (111) facet proportions in each of styrene, cyclohexene, and p-nitrotoluene hydrogenation. The good catalytic performance of high Pd(111) facet proportion catalyst for hydrogenations could be attributed to the H2 molecule prior to absorbed the Pd(111) facet promoting the formation of dissociated hydrogen atoms. These results above indicated that Pd-based catalysts with high (111) facet proportion facilitated hydrogenation performance.
綜述
鉍基納米材料在癌癥成像診斷與治療中的應用
劉應兵, 于文生, 王進賢, 董相廷, 付振東, 劉桂霞
2021, 37(1): 1-15  doi: 10.11862/CJIC.2021.013
[摘要]  (476) [HTML全文] (476) [PDF 44132KB] (476)
摘要:
隨著納米醫學的快速發展,納米診療材料因其兼具診斷和治療等多功能性而受到越來越多的關注。鉍(Bi)基納米材料具有優異的光學、電學和磁學性質,在腫瘤的診療一體化領域具有廣闊的應用前景。我們總結了Bi基納米材料常用的構建方法,重點介紹了其在計算機斷層掃描(CT)成像、光聲(PA)成像、放射療法(RT)、光熱療法(PTT)及協同作用方面的應用研究進展,并對其未來發展進行了總結和展望。
論文
混合熔鹽法低溫合成Sm2Ti2S2O5及其光催化分解水產氫
晁明坤, 馬貴軍
2021, 37(1): 16-22  doi: 10.11862/CJIC.2021.006
[摘要]  (210) [HTML全文] (210) [PDF 6750KB] (210)
摘要:
以TiO2、TiS2及Sm2O3為前驅體,分別加入LiCl-KCl與LiCl-CsCl的最低共熔混合物作為熔鹽,在較低溫度下成功合成了Sm2Ti2S2O5(STSO)顆粒。通過對比不同溫度下所制備產物的X射線衍射圖,首次表明STSO的熱力學結晶溫度在520℃左右,遠低于之前報道的650℃的最低合成溫度。掃描電子顯微鏡照片顯示,采用2種混合熔鹽制備的STSO都呈片狀形貌;同一合成溫度下,采用LiCl-CsCl熔鹽制備的STSO的厚度小于LiCl-KCl所得產物。采用出射光波長大于420 nm的氙燈作為光源,在含有Na2S-Na2SO3空穴犧牲劑的溶液中,所制備的STSO顆粒表現出最高35 μmol·h-1的光催化分解水產氫活性以及20 h以上的產氫穩定性。
鹽酸氯丙嗪對八肋游仆蟲中心蛋白C端功能的抑制
董倩, 葉旭文, 楊靜, 王文明, 趙亞琴, 楊斌盛
2021, 37(1): 23-32  doi: 10.11862/CJIC.2021.019
[摘要]  (188) [HTML全文] (188) [PDF 7248KB] (188)
摘要:
通過熒光光譜分析、等溫滴定量熱(ITC)、圓二色譜(CD)、電泳等技術研究了鹽酸氯丙嗪(CPZ)和八肋游仆蟲中心蛋白C端(apoC-EoCen)的結合以及CPZ對蛋白功能的影響。結果表明,在室溫下10 mmol·L-1 Hepes溶液(pH=7.4)中,CPZ與apoC-EoCen以物質的量之比為1:1結合,條件結合常數約為104L·mol-1。CPZ的結合導致蛋白質的二級結構發生改變,α螺旋含量減??;對金屬離子誘導中心蛋白的聚集產生了抑制作用,Tb3+敏化熒光強度也降低;阻礙了中心蛋白與著色性病干皮病C組蛋白(XPC)的結合;且影響了apoC-EoCen類核酸酶活性,導致蛋白對pBR322 DNA的切割能力下降;抑制了蛋白質的磷酸化。綜合實驗結果表明鹽酸氯丙嗪是中心蛋白的生物功能阻斷劑,對中心蛋白的功能具有良好的調控作用。
以2-(2-吡啶基)苯并噻吩為主配體的兩種藍紫光二價鉑配合物的合成與性質
王登強, 陳宇, 劉小慶, 卞健健, 尹新穎, 滕明瑜, 戎梅竹, 汪正良
2021, 37(1): 33-38  doi: 10.11862/CJIC.2021.012
[摘要]  (203) [HTML全文] (203) [PDF 1954KB] (203)
摘要:
以2-(2-吡啶基)苯并噻吩(2-(2-pyridyl)benzothiophene,btp)作為主配體,分別以鄰二氮菲[1, 10]并咪唑聯苯酚(2-(1H-imidazo[4,5-f][1, 10]phenanthrolin-2-yl)phenol,ipap)和3-甲基-6-苯基咪唑[2,1-b]噻唑(3-Methyl-6-phenylimidazo[2,1-b]thiazole,mpmt)作為輔助配體,成功合成了2個二價鉑配合物[(btp)Pt(ipap)]Cl與(btp)Pt(mpmt)Cl,并得到了配合物(btp)Pt(mpmt)Cl的晶體結構。由金屬-配體電荷轉移引起的2種配合物發光,具有60%左右的內量子效率,發射峰在426 nm(藍色)與381 nm(紫色)處。HOMO/LUMO軌道能級分別為-4.69 eV/-2.55 eV與-4.80 eV/-2.21 eV。單晶衍射結果表明,較低的共軛程度導致了該類配合物的短波長發射。
溶膠-凝膠法制備Fe摻雜MgF2催化劑及其催化1,1-二氟乙烷(R152a)脫HF反應的性能
張蕾, 李雨臻, 李利春, 韓文鋒, 李瑛, 唐浩東
2021, 37(1): 39-46  doi: 10.11862/CJIC.2021.021
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摘要:
通過助劑摻雜的方法解決MgF2催化劑高溫失活的問題。采用溶膠-凝膠法制備了一系列Fe3+摻雜的高比表面MgF2催化劑,并通過N2吸附-脫附測試、X射線衍射(XRD)、能量色散X射線光譜(EDS)和NH3程序升溫脫附技術(NH3-TPD)、電子自旋共振(ESR)、X射線光電子能譜(XPS)等對FeF3/MgF2催化劑的物化性質進行了表征。結果表明,一定量(物質的量分數小于20%)的Fe3+摻雜可以有效地減少MgF2晶粒度,且隨著Fe3+摻雜量的增加,催化劑的比表面積、酸性及1,1-二氟乙烷(R152a,C2H4F2)脫HF反應的催化活性均呈現增加趨勢,但當Fe3+摻雜量超過20%時,催化劑明顯失活。
三維α-MnO2@Co3O4異質材料的制備、表征及其催化性能
劉恒發, 謝鈺, 劉琪, 程高, 孫明, 余林
2021, 37(1): 47-54  doi: 10.11862/CJIC.2021.003
[摘要]  (189) [HTML全文] (189) [PDF 17321KB] (189)
摘要:
α-MnO2納米線為基底,原位生長ZIF-67,再經焙燒轉化為三維α-MnO2@Co3O4異質材料,并用于甲苯的催化燃燒反應。結果表明:粒徑大小約為12 nm的Co3O4納米顆粒均勻生長在MnO2納米線外表面,形成異質界面。該復合材料的低溫可還原性能更佳,具有更多的表面活性氧物種。相比于α-MnO2納米線,α-MnO2@Co3O4表現出更佳的甲苯催化燃燒性能:起燃溫度(轉化率10%)T10為202℃,完全燃燒溫度(轉化率90%)T90為235℃。
復合催化劑α-(Fe,Cu)OOH/RGO的制備、表征及其協同H2O2在可見光下去除環丙沙星性能
許俊鴿, 洪俊賢, 胡蝶
2021, 37(1): 55-64  doi: 10.11862/CJIC.2021.008
[摘要]  (215) [HTML全文] (215) [PDF 7674KB] (215)
摘要:
采用一步回流法制備了α-(Fe,Cu)OOH/RGO復合催化劑,通過粉末X射線衍射、掃描電子顯微鏡和X射線光電子能譜等對催化劑進行了表征,并以30 mg·L-1的環丙沙星(CIP)為目標污染物,研究了不同制備條件下所得催化劑在可見光照射下協同H2O2對CIP的去除效果。結果表明,成功實現了α-(Fe,Cu)OOH納米棒在石墨烯二維薄片上原位生長,α-(Fe,Cu)OOH/RGO復合材料的可見光吸收邊發生紅移,禁帶寬度從2.02 eV變為1.76 eV。石墨烯復合不但增強了對污染物的吸附能力,而且加快了光生電子的分離、遷移速率,還提高了反應體系中電子的傳導效率。當石墨烯復合比例(質量分數)為1%時,復合催化劑的催化性能最佳。當催化劑投加量為0.40 g·L-1,H2O2濃度為0.10 mol·L-1時,反應120 min,CIP被全部去除。α-(Fe,Cu)OOH/RGO循環使用5次,對CIP的去除率均在90%以上,表明催化劑具有較強的催化活性和較好的穩定性。
巰基/羧基修飾硅藻土及其對Pb(Ⅱ)、Cd(Ⅱ)的吸附性能
杜玉成, 李生輝, 谷恒學, 李楊, 吳俊書, 靳翠鑫
2021, 37(1): 65-73  doi: 10.11862/CJIC.2021.025
[摘要]  (218) [HTML全文] (218) [PDF 20944KB] (218)
摘要:
以3-巰基丙基三甲氧基硅烷(MPTS)、3-氨基丙基三乙氧基硅烷(APTES)、檸檬酸(CA)為原料,采用水浴法、水浴/低溫水熱法,分別制備了巰基(—SH)、氨基/羧基(—NH2/—COOH)表面修飾的硅藻土。采用傅里葉變換紅外光譜、掃描電子顯微鏡、氮氣吸附-脫附測試、熱重/差示掃描量熱法、X射線光電子能譜等技術對樣品進行了表征,并探討分析了樣品制備機理。當重金屬離子溶液pH=7,吸附時間為4 h時,以MPTS制備的巰基修飾硅藻土吸附劑對Pb(Ⅱ)、Cd(Ⅱ)的最大吸附容量分別為396、365 mg·g-1;以APTES、CA制備的氨基/羧基縮合修飾硅藻土吸附劑對Pb(Ⅱ)、Cd(Ⅱ)最大吸附容量分別為485、462 mg·g-1。
三元混配銅(Ⅱ)配合物的晶體結構、DNA作用及其生物活性
蔡戴宏, 莫慧雯, 何良, 樂學義
2021, 37(1): 74-84  doi: 10.11862/CJIC.2021.026
[摘要]  (240) [HTML全文] (240) [PDF 12348KB] (240)
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利用溶劑緩慢揮發法合成了以5-氯-2-(2'-吡啶基)苯并咪唑為主配體、L-苯丙氨酸根為輔助配體的三元混配銅(Ⅱ)配合物:[Cu(HPBC)(L-Phe)(H2O)]ClO4(簡稱為1,HPBC=5-氯-2-(2'-吡啶基)苯并咪唑,L-Phe=L-苯丙氨酸根)。采用元素分析、紅外光譜、紫外可見光譜、摩爾電導率測定和電噴霧質譜等手段對配合物1進行了表征,利用X射線單晶衍射確定配合物具有五配位的變形四方錐構型,并通過電子吸收光譜、熒光光譜、粘度測定及分子對接等方法揭示了配合物主要以插入作用的方式與小牛胸腺DNA(CT-DNA)結合。配合物對被測微生物(李斯特菌、金黃色葡萄球菌和大腸桿菌)及癌細胞(SGC-7901、Bel-7402、HeLa和A549)顯示出良好的抗菌和細胞毒活性(IC50=1.69~2.50 μmol·L-1)。最重要的是,通過確定細胞的形態變化(AO/EB雙染法)及細胞周期測定分析,揭示了配合物1通過DNA結合的途徑誘導SGC-7901細胞凋亡。
基于1D/0D有序復合SnO2納米晶的鈣鈦礦太陽能電池
劉德政, 楊高元, 向文灝, 王松, 李望南, 鐘杰, 黃福志, 陳美華, 梁桂杰
2021, 37(1): 85-94  doi: 10.11862/CJIC.2021.005
[摘要]  (215) [HTML全文] (215) [PDF 14795KB] (215)
摘要:
通過水熱前驅體中的功能添加劑調控一維(1D)納米棒陣列疏密度,繼而在納米棒間隙沉積零維(0D)納米顆粒,制備1D/0D有序的復合SnO2電子傳輸層(ETL),并組裝高效、穩定的鈣鈦礦太陽能電池。系統研究前驅體中NaCl添加劑以及后續納米顆粒的沉積對復合ETL的形貌結構、光譜性能及界面電荷過程的作用規律,探討上述作用對電池光電性能的影響機制。前驅體中NaCl的加入使棒密度變小,從而使0D納米顆粒順利滲透到1D納米棒間隙中,其對鈣鈦礦/ETL和鈣鈦礦/FTO界面復合的抑制作用是造成器件開路電壓和填充因子增大的原因。在經2 mL飽和NaCl水溶液改性的1D電子傳輸層ETL-2Cl的基礎上,繼續沉積0D的納米顆粒,制備得到新型1D/0D復合電子傳輸層ETL-2P,后者優良的電荷復合抑制作用(復合電阻是ETL-2Cl的2.9倍)和高效的電子抽提性能(抽提速率3.03×107 s-1,抽提效率91.6%)促成了電池較優的光電性能(光電效率12.15%)。
Mn、Mg共摻雜Ni(OH)2的電化學性能
姚壽廣, 竇飛, 劉頓, 程杰
2021, 37(1): 95-102  doi: 10.11862/CJIC.2021.014
[摘要]  (224) [HTML全文] (224) [PDF 14927KB] (224)
摘要:
采用緩沖溶液法制備復合摻雜Mn、Mg的正極材料Ni0.82Mn0.18-xMgx(OH)2(x=0.06、0.09、0.12)。采用XRD、XPS和SEM等測試表征材料的晶體結構、錳價態和形貌,采用循環伏安和恒流充放電測試研究Mn、Mg不同摻雜比例對氫氧化鎳電化學性能的影響。結果表明,Mn、Mg摻雜樣品均為β相,晶粒細化;Ni0.82Mn0.09Mg0.09(OH)2樣品具有優異的電極反應可逆性和充放電性能,100 mA·g-1電流密度下的放電比容量(290.6 mAh·g-1)優于商用β-Ni(OH)2(281.1 mAh·g-1);且500 mA·g-1電流密度下循環30圈后,Ni0.82Mn0.09Mg0.09(OH)2的放電比容量未見衰減,其循環穩定性優于商用β-Ni(OH)2。
鉻-對苯二甲酸MOF的框架異構:MIL-88B(Cr)和MIL-101(Cr)
趙田, 朱和鑫, 董茗, 趙熠
2021, 37(1): 103-109  doi: 10.11862/CJIC.2021.018
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可以通過簡單地控制乙酸濃度的方法,在相似的水熱合成條件下合成2種同一家族的金屬有機框架材料(MOFs):MIL-88B(Cr)和MIL-101(Cr)。在相對較低的乙酸濃度下,可以得到平均粒徑為100 nm的MIL-101(Cr),并擁有很高的BET比表面積(3 543 m2·g-1)。而在相對較高的乙酸濃度下,則可得到另一種具有“呼吸”特性結構的MOF——MIL-88B(Cr)。利用粉末X射線衍射、掃描電鏡、N2吸附-脫附分析、熱重分析等對它們的結構、形貌、孔隙率等性質做了詳細的分析。
高鎳系正極材料LiNi0.88Co0.07Al0.05O2的制備及性能表征
羅京, 劉建雄, 黃玲, 肖方明, 李文超, 唐仁衡, 王英
2021, 37(1): 110-120  doi: 10.11862/CJIC.2021.010
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摘要:
以鎳鈷氫氧化物為原料,采用異丙醇鋁水解法合成Ni0.88Co0.07Al0.05(OH)2,將前驅體與鋰源充分混合,通過3種燒結條件制備出球形LiNi0.88Co0.07Al0.05O2正極材料,借助X射線衍射(XRD)、掃描電鏡(SEM)、透射電鏡(TEM)、X射線光電子能譜(XPS)以及電化學測試等表征手段對材料的晶體結構、微觀形貌和電化學性能進行了較系統的研究。研究表明,在500℃下保溫3 h、700℃下保溫14 h的條件下合成的LiNi0.88Co0.07Al0.05O2具有良好的綜合電化學性能,0.2C放電比容量達192.2 mAh·g-1,首次充放電效率為81.6%,1C放電比容量為190.7 mAh·g-1,100周后放電比容量為141.1 mAh·g-1,容量保持率達到73.4%。
Articles
Preparation, Structures and Thermal Stabilities of Four Transition Metal Complexes Constructed by 3, 7-Di(3-pyridyl)-1, 5-dioxa-3, 7-diazacyclooctane Bipyridine Ligand
Li LI
2021, 37(1): 121-130  doi: 10.11862/CJIC.2021.009
[摘要]  (170) [HTML全文] (170) [PDF 5547KB] (170)
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Four transition metal complexes, [Co(NO3) (H2O)2(L)2]NO3 (1), [Co2Cl4(L)2] ·CH2Cl2 (2), [Cd2(AcO)4(L)2] ·4CH3OH (3) and[Cd2(NO3)2(CH3OH)2(H2O)2(L)2](NO3)2·2H2O (4), were synthesized by employing a clamplike bipyridine ligand 3, 7-di(3-pyridyl)-1, 5-dioxa-3, 7-diazacyclooctane (L). Single-crystal X-ray analysis reveals that complex 1 is mononuclear structure; 2 is macrocyclic dimer; wheras 3 and 4 are rectangular dinuclear structures. The ligand molecules in these complexes has shown three types of coordination mode including mono-dentate, trans-bridge and cis-bridge. All of the complexes were also characterized by elemental analysis, IR, thermal stabilities and singlecrystal structure analysis.CCDC: 940778, 1; 915840, 2; 1446573, 3; 1446574, 4.
Reviews
Ni(OH)2 with Super-Small Nanoscale: Synthesis and Application in Li+ Adsorptions
Nan JING, An-Nan ZHOU, Guo-Hui WANG, Run-Wei WANG, Qing-Hong XU
2021, 37(1): 131-139  doi: 10.11862/CJIC.2021.015
[摘要]  (215) [HTML全文] (215) [PDF 13885KB] (215)
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α-Ni(OH)2 nanoparticles with 5 nm average diameter were prepared under the existence of glucose in water solution, and the size of α-Ni(OH)2 nanoparticles was found to be controlled by the concentration of glucose. A possible mechanism of the preparation process was proposed. When the synthesis was processed without existence of the glucose, β-Ni(OH)2 was obtained. The super-small α-Ni(OH)2 nanoparticles showed strong adsorption ability to Li+ ions when pH value of the solution was about 7.0 under room temperature. Maximum adsorption capacity of the super-small α-Ni(OH)2 nanoparticles to Li+ was about 214 mg·g-1; however, the β-Ni(OH)2 with diameter above 1.0 μm was low than 30 mg·g-1. Freundlich equation analysis and SEM images of the adsorption products indicate multilayers' adsorption process to Li+ of α-Ni(OH)2 nanoparticles.
Dynamic Formation of Pdδ+-Fe2+ Interface Promoting Reverse Water Gas Shift Reaction over Pd/FeOx Catalyst
Dian-Yu ZHANG, Fang LIU, Peng-Fei DU, Meng-Wei LI, Zhao-Xuan WU, Yi-Bing FENG, Yang ZHAO, Xiao-Yan XU, Xin-Xing ZHANG, Jun-Ling LU, Bing YANG
2021, 37(1): 140-150  doi: 10.11862/CJIC.2021.002
[摘要]  (196) [HTML全文] (196) [PDF 5116KB] (196)
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We systematically investigated Pd/FeOx for the reverse water gas shift (RWGS) reaction using a combination of ex situ and in situ characterizations, including transmission electron microscopy (TEM), Fourier-transform infrared (FTIR) spectroscopy, temperature-programmed desorption/reduction/oxidation (TPD/TPR/TPO), and X-ray photoelectron spectroscopy (XPS). A highly dispersed Pd/FeOx catalyst was synthesized using Pd(acac)2 as the precursor. The catalyst exhibited high activity, with CO2 conversion of ~29% and CO selectivity ogreater than 98% at 400℃, which are among the highest values in the literature. Moreover, Pd/SiO2 and Pd-Fe/SiO2 were further studied to determine the significant role of the Pd-FeOx interface in promoting the RWGS reaction. Semi-in situ XPS revealed the dynamic formation of Pdδ+-Fe2+ species at the Pd-FeOx interface; the species acted as highly active sites for CO2 dissociation. Our results also showed the formation of the Pdδ+-Fe2+ interface during the RWGS reaction remarkably enhanced the activity and selectivity of the Pd-FeOx catalyst for the reaction, benefiting CO2 adsorption, C=O dissociation, and CO desorption.
Aluminum Amine Compound Protected by β-Diketiminate Ligand: Preparation and Enhanced Performance as Catalyst for Ring-Opening Polymerization of ε-Caprolactone
Wen-Ling LI, Ben YAN, Chen-Guang SUN, Qiu-Miao SHEN, Wen-Qing LIU, Xiao-Li MA, Zhi YANG
2021, 37(1): 151-156  doi: 10.11862/CJIC.2021.007
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摘要:
An aluminum amine compound (L)AlH(NMe2) (L=HC(C(Me)NAr)2, Ar=2, 6-iPr2C6H3) (1) protected by steric β-diketiminate ligand L has been synthesized successfully. A two-step synthesis method was employed to prepare the aluminum amine (L)AlH(NMe2) compound. The aluminum amine compound (L)AlH(NMe2) was identified via NMR spectroscopy, elemental analysis, infrared diffuse reflectance spectroscopy and X-ray single crystal diffraction analysis. The aluminum amine compound containing both Al-NMe2 and Al-H substitutes showed excellent catalytic performance on the ring-opening polymerization of ε-caprolactone. The molecular weight and molecular weight distribution of the resultant polycaprolactone were determined by high performance gel penetration chromatography.
Easy Preparation of N-Doped Graphene-like Nanosheets as Excellent Metal-Free Cathodic Electrocatalysts of Zn-Air Battery
Xiao-Kun YANG, A-Ling CHEN, Qing-Feng YI
2021, 37(1): 157-170  doi: 10.11862/CJIC.2021.001
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Carbon-based materials have been paid much attention due to their own good electroactivity and resources availability. Herein, we reported a simple and versatile synthesis strategy for the preparation of nitrogen-doped and metal-free carbon catalysts with excellent oxygen reduction reaction (ORR) electroactivity. Using dicyandiamide (DCD) as nitrogen source and sucrose, β-cyclodextrin and chitosan as different carbon sources, N-doped graphene-like nanosheet samples CN-nanosh(suc), CN-nanosh(cyc) and CN-nanosh(ch) were prepared by an easy pyrolysis of their mixture. The samples exhibited outstanding ORR electroactivity in alkaline media with a comparable performance to the benchmark Pt/C. Alkaline Zn-air battery with the prepared sample CN-nanosh(suc) as the cathodic catalyst displayed the maximum power density of 201.33 mW·cm-2, and its discharge time can last for more than 50 h at a constant current density of 100 mA·cm-2, which is close to the optimum values of the similar Zn-air battery with the metal-free cathodic electrocatalysts reported so far.
Electrodeposition of NiS on CoNi2S4 for Flexible Solid-State Asymmetric Supercapacitors
Ye-Zeng HE, Hou-Qiang ZHAO, Peng LIU, Yan-Wei SUI, Fu-Xiang WEI, Ji-Qiu QI, Qing-Kun MENG, Yao-Jian REN, Dong-Dong ZHUANG
2021, 37(1): 171-179  doi: 10.11862/CJIC.2021.011
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摘要:
An effective approach of depositing NiS on CoNi2S4 was adopted to improve the performance of bimetallic cobalt/nickel-sulfide. The as-obtained CoNi2S4@NiS had an excellent specific capacitance of 1 433 F·g-1 at 1 A·g-1 and shows a superior rate performance of 69.6% at 10 A·g-1. A flexible solid-state asymmetric supercapacitor assembled with CoNi2S4@NiS and the reduced graphene oxide showed a high energy density of 36.6 Wh·kg-1 at a power density of 800 W·kg-1 and had a fantastic cycle performance of 78.7% retention after 10 000 cycles, indicating that the CoNi2S4@NiS nanocomposite is a promising electrode material for energy storage devices.
Preparation and in Vitro Experiment of Attapulgite-based Microgels with Magnetic/Temperature Dual Sensitivities
Tian-Le LI, Hui ZHONG, Xiao-Rong LI, Jing ZHOU, Yi-Xin LIU, Wei-Cheng HU, Zhi-Peng CHENG, Cheng YAO
2021, 37(1): 180-188  doi: 10.11862/CJIC.2021.017
[摘要]  (180) [HTML全文] (180) [PDF 11509KB] (180)
摘要:
The folic acid (FA)-grafted magnetic FA-Fe3O4/ATP-P(NIPAM-AAM) composite microgels (attapulgite=ATP, N-isopropyl acrylamide=NIPAM, acrylamide=AAM) were prepared via a method of emulsion copolymerization. The as-prepared microgels were characterized by X-ray diffraction (XRD), vibrating sample magnetometer (VSM), thermogravimetric analysis (TG), infrared spectroscopy (IR), UV-visible spectroscopy (UV), scanning electron microscope (SEM) and transmission electron microscope (TEM). The dynamic light scattering (DLS) results show that the low critical solution temperature (LCST) of microgel was about 38.5℃. The drug delivery ability of the as-prepared microgels was evaluated by using doxorubicin hydrochloride (DOX) as the model drug. Based on the drug loading and releasing results, the presence of ATP increased the amount of drug loading and releasing. Compared with free DOX, the in vitro cytotoxicity of DOX loaded FA-Fe3O4/ATP-P(NIPAM-AAM) was decreased and the biocompatibility was improved. Those results indicate that the microgels of FA-Fe3O4/ATP-P(NIPAM-AAM) can be used in potential as a slow-release drug system. The in vitro cellular uptake test revealed that the microgels of FA-Fe3O4/ATP-P(NIPAM-AAM) at the assigned site were significantly richer than that of other sites. This result indicates that the microgels of FA-Fe3O4/ATP-P(NIPAM-AAM) composite are targeting and expectable in the application of targeted drug releasing.
Errata
Correction to "Direct Observation of Magnetic Transitions in a Nickel(Ⅱ) Complex with Large Anisotropy"
N. Widener Chelsea, N. Bone Alexandria, Ozerov Mykhaylo, Richardson Rachael, Zheng-Guang LU, Thirunavukkuarasu Komalavalli, Smirnov Dmitry, Xue-Tai CHEN, Zi-Ling XUE
2021, 37(1): 189-189  doi: 10.11862/CJIC.2021.040
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摘要:

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