金属元素替换对锌-铜基金属有机骨架材料的光吸收与能带特性的影响(英文)  

Effect of Metal Exchange on the Light-Absorbing and Band-Gap Properties of Nanoporous Zn-Cu based MOFs

作　　者：杨龙[1] 王秦 邓勇军 王晓媛[1] 何轫 衣志勇[1] 江龙[2] 邱勇[1] YANG Long;WANG Qin;DENG Yong-Jun;WANG Xiao-Yuan;HE Ren;YI Zhi-Yong;JIANG Long;QIU Yong(Institute o f Systems Engineering,China Academy o f Engineering Physics,Mianyang,Sichuan 621999,China;State Key Laboratory of Polymer Materials Engineering of China,Polymer Research Institute of Sichuan University,Chengdu 610065,China;Shock and Vibration of Engineering Materials and Structures Key Laboratory o f Sichuan Province,Mianyang,Sichuan 621000,Chin)

机构地区：[1]中国工程物理研究院总体工程研究所,绵阳621999 [2]高分子材料工程国家重点实验室,四川大学高分子研究所,成都610065 [3]工程材料与结构冲击振动四川省重点实验室,绵阳621000

出　　处：《无机化学学报》2018年第7期1199-1208,共10页Chinese Journal of Inorganic Chemistry

基　　金：中国博士后科学基金(No.2016M602715); 国家自然科学基金(No.51573109); 高分子材料工程国家重点实验室开放课题(No.sklpme2017-4-08)资助项目

摘　　要：选择常规的锌、铜作为金属离子、对苯二甲酸(BDC)作为有机配体,通过溶剂热法和元素替换法合成出Zn-Cu基MOFs材料。通过XRD、UV-Vis DRS、SEM、FT-IR、UPS和XPS等手段表征和研究,发现Zn(BDC)的光吸收位于紫外光波段(<400 nm),而Cu(BDC)光吸收拓宽至整个可见光波段(500~1 000 nm)。Zn-Cu金属离子均匀分散的产物Zn-Cu-BDC比其它产物具有更宽的光吸收范围、强度和更窄的带隙;不同的合成途径导致Zn-Cu基MOFs材料表现出性质差异。Cu and Zn ions were selected as the basic mixed metal nodes connected by organic ligand 1,4-benzenedicarboxylic acid（BDC） and synthesized nanoporous Zn-Cu based mixed-metal MOFs Zn（BDC）-Cu, Cu（BDC）-Zn and Zn-Cu-BDC through different synthetic routes. Through characterization of PXRD, SEM, UV-Vis DRS, FT-IR, XPS and UPS and systematic analysis, it is found that the solar light absorbing range of Zn（BDC） is located in UV band（400 nm）, while Cu（BDC） mainly absorbs the whole visible light（500~1 000 nm）. Additionally,the Zn-Cu ions uniformly-dispersed product Zn-Cu-BDC performs better in light-absorption and exhibits lower photo band-gap and HOMO level than the other bi-metallic products Zn（BDC）-Cu and Cu（BDC）-Zn. The investigation might inspire the design of heterogeneous photocatalysts and organic-inorganic hybrids in the aspects of light-absorption and charge transfer and construction methods on metal exchange due to different routes leading to different properties despite of the same components.

关 键 词：金属有机骨架 锌-铜 金属元素替换 光吸收 能带 

分 类 号：O614.241[理学—无机化学] O614.121[理学—化学]