Fe doped g-C_(3)N_(4) composited ZnIn_(2)S_(4) promoting Cr(Ⅵ) photoreduction  

作　　者：Zhuoga Cirena Yu Nie Yanfang Li Huilin Hu Xiang Huang Xin Tan Tao Yu 

机构地区：[1]School of Environmental Science and Engineering,Tianjin University,Tianjin 300350,China [2]School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China [3]School of Materials Science and Engineering,Tianjin University,Tianjin 300350,China [4]School of Science,Tibet University,Lhasa 850000,Chin

出　　处：《Chinese Chemical Letters》2023年第4期430-435,共6页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 22066022)。

摘　　要：30% Fe CN/ZIS(30% Fe doped g-C_(3)N_(4)composited ZnIn_(2)S_(4)) was synthesized by a simple water bath method, via in-situ growth of abundant well-dispersed ZnIn_(2)S_(4)nanosheets on the Fe doped g-C_(3)N_(4)surface. Experimental results showed the optimized 30% Fe CN/ZIS achieved the best photoreduction of Cr(VI)performance within a wide p H range, which was 9.5 times and 700 times higher than that of pure ZnIn_(2)S_(4)and 30% Fe CN(Fe doped g-C_(3)N_(4)). This is due to the intense synergy between the Fe-Nxbond and close interface contact produces a high-speed charge transfer channel, thus significantly improving the efficiency of optical carrier separation and migration. Meanwhile, UV-vis diffuse reflection spectra and photoluminescence spectroscopy showed that iron doping significantly narrowed the bandgap of gC_(3)N_(4), preventing electron-hole pair recombination. Further, the microstructures and charge separation properties were analyzed by scanning electron microscope, Photoluminescence Spectroscopy and timeresolved photoluminescence, which revealed the structure-activity relationship of composite structure and the synergistic mechanism of each functional component. This research should provide a viable technique for creating composites with high photocatalytic activity for the treatment of chromium-containing wastewater.

关 键 词：Hexavalent chromium 30%FeCN/ZIS composites Interfacial interaction Synergistic effect 

分 类 号：X703[环境科学与工程—环境工程] O643.36[理学—物理化学] O644.1[理学—化学]