文献类型：期刊文献

英文题名：A novel hollow-sphere cyclodextrin nanoreactor for the enhanced removal of bisphenol A under visible irradiation

作者：Zhou, Yi[1,2];Lu, Jian[1];Liu, Qiming[1];Chen, Huafeng[1];Liu, Yongdi[1];Zhou, Yanbo[1,2]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Shanghai Inst Pollut Control & Ecol Secur, 1515 Zhongshan Second North Rd, Shanghai 200092, Peoples R China

年份：2020

卷号：384

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20193907483067);WOS:【SCI-EXPANDED(收录号:WOS:000535561100051)】；

基金：This work was supported by the National Natural Science Foundation of China (51778230), Shanghai Rising-Star Program (17QA1401000), China Postdoctoral Science Foundation (2018M641943) Shanghai Sailing Program (19YF1411900) and the Fundamental Research Funds for the Central Universities for their financial support(222201718003).

语种：英文

外文关键词：Biphenol A; Photocatalysis; Cyclodextrin; Spatially separated co-catalyst; Advanced treatment

摘要：A novel hybrid nanoreactor with spatially separated co-catalysts (SH-CD-Au@CdS@MnOx) was successfully synthesised to remove bisphenol-A (BPA) from water by visible light. The photooxidation intermediates, degradation pathway of BPA and the enhancement mechanism were investigated in particular. Gold (Au) nanoparticles modified with SH-beta-cyclodextrin and MnOx nanoparticles were selectively decorated on the interior and exterior surface of hollow CdS nanoreactors, respectively. The directed migration of photogenerated electrons and holes induced by spatially separated co-catalysts lead to high utilization of light, and SH-beta-cyclodextrin modification makes catalytic active sites more accessible for oxidation intermediates. Compared with pristine CdS, the hybrid nanoreactor increased the BPA photooxidation reaction rate and the TOC removal efficiency by 5.6-fold and 3.6-fold, respectively. Moreover, the toxic intermediates, such as phenol, were further degraded by visible light. Molecular orbital calculation predicted that the sites on BPA molecule values of (FEDHOMO2 + FEDLUMO2) can be easier attacked by the radical, whereas atoms with higher values of 2FEDL mo can easily be extracted into electrons. Thus, SH-CD-Au@CdS@MnOx can provide a new strategy for the high-efficiency photodegradation of endocrine disrupter compounds in advanced water treatments.