南京工业大学学报（自然科学版）2024，Vol.46Issue(1)：36-45,10.DOI:10.3969/j.issn.1671-7627.2024.01.005
Tb掺杂Bi2WO6降解盐酸四环素性能
Performance in degradation of tetracycline hydrochloride over Tb-doped Bi2WO6
胡鑫 1王晟 1徐梦颖 1王洁溪 1薛峰 1汪雨 1余超翼1
作者信息
- 1. 南京工业大学化工学院,江苏南京 211800
- 折叠
摘要
Abstract
As a photocatalyst,Bi2WO6 has the disadvantages of a narrow light response range and low efficiency in separating photogenerated electron-hole pairs.To address these drawbacks,Tb-doped Bi2WO6(Tb-BWO)was synthesized using hydrothermal method.Its photocatalytic performance was evaluated by degrading tetracycline hydrochloride(TCH)under visible light irradiation.The improvement in photocatalytic activity,degradation mechanism and stability of the photocatalyst were analyzed.Results indicated that at 1.2％Tb cation concentration,1.2Tb-BWO showed the highest photocatalytic activity,degrading 60.1％of TCH after 240 min of reaction.The enhanced activity of Tb-BWO was attributed to the Tb ion doping introducing impurity levels near the conduction band level ofBWO,which reduced the band gap and promoted photogenerated electron-hole pair generation.Oxygen vacancies adsorbed oxygen and reacted with trapped electrons to form strong oxidant superoxide radicals(·O2),thereby inhibiting photogenerated electron-hole pair recombination.Photogenerated electrons reduced Tb4+to Tb3+,while Tb34 was oxidized to Tb4+ and ·O2- by O2,aiding in the separation of photogenerated electron-hole pairs.TCH was decomposed by active radicals ·O2-and h+,with·O2-playing a crucial role.The catalyst's stability was maintained by cleaning the adsorbed TCH on the surface with ethanol after each cycle.关键词
半导体/光催化降解/盐酸四环素/Tb掺杂/Bi2WO6Key words
semiconductors/photocatalytic degradation/tetracycline hydrochloride/Tb-doping/Bi2WO6分类
化学化工引用本文复制引用
胡鑫,王晟,徐梦颖,王洁溪,薛峰,汪雨,余超翼..Tb掺杂Bi2WO6降解盐酸四环素性能[J].南京工业大学学报（自然科学版）,2024,46(1):36-45,10.
