文献类型：期刊文献

英文题名：Fabrication of a coated BiVO4@LDHs Z-scheme heterojunction and photocatalytic degradation of norfloxacin

作者：Zhang, Lianyang[1];Meng, Yue[2,3];Dai, Tiantian[4];Yao, Yiyang[5];Shen, Hui[5];Xie, Bo[4];Ni, Zheming[4];Xia, Shengjie[4]

机构：[1]Shaoxing Univ, Coll Text & Fash, Key Lab Clean Dyeing & Finishing Technol Zhejiang, Shaoxing 312000, Zhejiang, Peoples R China;[2]Huzhou Coll, Dept Life & Hlth Sci, Huzhou 313000, Peoples R China;[3]Huzhou Univ, Sch Life Sci, 759 East Erhuan Rd, Huzhou 313000, Peoples R China;[4]Zhejiang Univ Technol, Coll Chem Engn, Dept Chem, 18 Chaowang Rd, Hangzhou 310014, Peoples R China;[5]Zhejiang Huayuan Pigment Co Ltd, Deqing 310024, Zhejiang, Peoples R China

年份：2022

卷号：219

外文期刊名：APPLIED CLAY SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000794292500002)、、WOS

基金：Acknowledgment This work is supported by National Natural Science Foundation of China (92061126, 51871091) .

语种：英文

外文关键词：Z -scheme heterojunction; Layered double hydroxides (LDHs); BiVO 4; Photodegradation; Antibiotic

外文摘要：The decahedral morphology of BiVO(4 )and ZnCr-layered double hydroxides (LDHs) nanosheets enables the construction of a BiVO4@LDHs Z-scheme heterojunction (BiVO4 as core and LDHs as a shell) for photocatalytic degradation of norfloxacin, typical antibiotic. The effects of initial concentration of norfloxacin, catalyst loading, reaction temperature, and pH value on the performance of photodegradation were studied. It was found that the removal of norfloxacin can reach 90.3% under the optimized conditions. The core-shell structure enhances the specific surface area, improves the energetic alignment of the band structures, and produces enough hydroxyl and superoxide radicals to degrade norfloxacin. Density functional theory (DFT) calculations show that a built-in electric field is formed between ZnCr-LDHs and BiVO4, which promotes the transfer of photogenerated electrons from the valence band of ZnCr-LDHs to the conduction band of BiVO4. This transfer accelerates the flow of photogenerated electrons and reduces the recombination of electron-hole pairs, so that BiVO4@LDHs heterojunction shows excellent photocatalytic activity for norfloxacin.