Cyclodextrin-boosted photocatalytic oxidation for efficient bisphenol A removal  

作　　者：Qinwei Lu Jinjie Lu Juying Lei Xubiao Luo Yanbo Zhou 

机构地区：[1]State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process,East China University of Science and Technology,Shanghai 200237,China [2]Shanghai Institute of Pollution Control and Ecological Security,Shanghai 200092,China [3]School of Life Science,Jinggangshan University,Ji’an 343009,China

出　　处：《Chinese Chemical Letters》2025年第3期156-163,共8页中国化学快报(英文版)

基　　金：supported by Program of Shanghai Outstanding Technology Leaders(No.20XD1433900);the National Natural Science Foundation of China(No.52370168).

摘　　要：Wastewater contains various high-risk trace organic pollutants,such as antibiotics and endocrine disruptors,which seriously restrict wastewater reuse.Cyclodextrin-based functional materials show great potential in the removal of trace pollutants because of their adsorption catalytic synergy.Clarifying the synergistic mechanism of cyclodextrin in oxidation is the key issue in confined catalytic oxidation process design.In this work,we fabricated a BiOIO_(3)@BiOBr/β-CD heterojunction photocatalyst to study the synergistic mechanism of cyclodextrin in the photocatalytic oxidation process.The synergistic mechanism of cyclodextrin was investigated by combining radical chemistry,electrochemistry,spectroscopy,and timedependent density functional theory.Results showed that the excited intermediate free radicals played an important role in promoting the photocatalytic degradation process.The heterojunction photocatalyst loaded withβ-cyclodextrin(β-CD)at the electronic end(C[Cat.]=0.2mg/mL)removed about 97%of bisphenol A(BPA)within 30min,and the first-order kinetic constant(k_(CDBIB)=0.112 min^(−1))was about twice that of the unloadedβ-CD(k_(BIB)=0.057 min^(−1)).Cyclodextrin loading improved the photocatalytic performance of the heterojunction and stimulated the intermediate to increase the free radical yield and regulate the reaction path.

关 键 词：PHOTOCATALYSIS Β-CYCLODEXTRIN Bisphenol A Confined catalysis Organic free radical 

分 类 号：O643.3[理学—物理化学]