文献类型：期刊文献

英文题名：Fabrication of Co3O4 and Au co-modified BiOBr flower-like microspheres with high photocatalytic efficiency for sulfadiazine degradation

作者：Guan, Zhipeng[1,2];Li, Qiaoying[1,2];Shen, Bin[1,2];Bao, Shenyuan[1,2];Zhang, Jinlong[1,2];Tian, Baozhu[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, Feringa Nobel Prize Scientist Joint Res Ctr, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2020

卷号：234

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20193907464771);WOS:【SCI-EXPANDED(收录号:WOS:000491627200033)】；

基金：This work has been supported by the National Natural Science Foundation of China (21573069, U1862112 and 21811540394), Shanghai Municipal Science and Technology Major Project (2018SHZDZX03), Programme of Introducing Talents of Discipline to Universities (B16017), and Fundamental Research Funds for the Central Universities (50321041917001).

语种：英文

外文关键词：BiOBr flower-like microspheres; Selective deposition; Photocatalytic degradation; Spacial charge carrier separation; Antibiotic

摘要：For the first time, we fabricated Au-BiOBr-Co3O4 hierarchical flower-like microspheres by hydrothermal and photo-deposition methods. Au and Co3O4 nanoparticles (NPs) were selectively deposited on the {0 0 1} and {1 1 0} facets of BiOBr nanopetals, respectively. The light absorption, photoluminescence (PL), and electrochemical analyses revealed that the selectively deposited Au and Co3O4 can effectively enhance both the visible-light absorption and charge carrier separation in space. The photocatalytic degradation of sulfadiazine (SD) indicated that the degradation of SD follows the pseudo-first-order reaction and the reaction rate constant was increased 17 times from BiOBr flower-like microspheres (0.00014 min(-1)) to Au and Co3O4 co-modified Au-BiOBr-Co3O4 flower-like microspheres (0.00254 min(-1)). From the high performance liquid chromatographymass spectrometry (HPLC-MS) measurement, it was disclosed that the desulfonated and bromized products are the main intermediates during SD degradation over Au-BiOBr-Co3O4. Meanwhile, the reactive species trapping experiments confirmed that Au-BiOBr-Co3O4 can produce h(+) , O-center dot(2)-, and Br-0 reactive species responsible for antibiotic degradation. On the basis of these experiment results and discussion, the degradation mechanism of SD over Au-BiOBr-Co3O4 was tentatively discussed. We think this work provides a reference to fabricate novel photocatalytic materials for the effective degradation of antibiotics.