Construction of defect-containing UiO-66/MoSe_(2) heterojunctions with superior photocatalytic performance for wastewater treatment and mechanism insight

查看全文 作　　者：Xiao [1,2]Han;Xiaoxuan [1,2]Wang;Jiafang [1,2]Wang;Yingjie [1,2]Xie;Cuiwei [1,2]Du;Chongfei [1,2]Yu;Jinglan [1,2]Feng;Jianhui [1,2]Sun;Shuying [1,2]Dong 机构地区：[1]School of Environment,Henan Normal University,Xinxiang 453007,China;[2]Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control,Ministry of Education,Xinxiang 453007,China 出　　处：《Frontiers of Chemical Science and Engineering》索引2023年第17卷第4期,共11页 基　　金：supported by the National Natural Science Foundation of China (Grants Nos.22076039,and 22176051);Natural Science Foundation of Henan Province (Grant No.222300420054);excellent Science and Technology Innovation Team of Henan Normal University (Grant No.2021TD03). 摘　　要：Metal-organic frameworks are recognized as promising multifunctional materials,especially metal-organic framework-based photocatalysts,which are considered to be ideal photocatalytic materials.Herein,a new type of UiO-66/MoSe_(2) composite was prepared using the solvothermal method.The optimum composite was selected by adjusting the mass ratio of UiO-66 and MoSe_(2).X-ray diffraction analysis showed that the mass ratio influenced the crystal plane exposure rate of the composite,which may have affected its photocatalytic performance.The composite is composed of ultra-thin flower-like MoSe_(2) that wrapped around cubic UiO-66,a structure that increases the abundance of active sites for reactions and is more conducive to the separation of carriers.The photocatalytic properties of the composite were evaluated by measuring the degradation rate of Rhodamine B and the catalyst’s ability to reduce Cr(VI)-containing wastewater under visible light irradiation.Rhodamine B was decolorized completely in 120 min,and most of the Cr(VI)was reduced within 150 min.The photochemical mechanism of the complex was studied in detail.The existence of Mo^(6+)and oxygen vacancies,in addition to the Z-type heterojunction promote the separation of electrons and holes,which enhances the photocatalytic effect. 关 键 词：UiO-66 MoSe_(2) PHOTOCATALYSIS dye-containing wastewater heavy metal wastewater oxygen vacancies