MOF-808/AgBr的制备及光催化降解盐酸四环素性能研究  

Preparation and photocatalytic degradation oftetracycline hydrochloride using MOF-808/AgBr

作　　者：杜书雅 王旭东[1,2] 董永浩 吕嘉辰 李洁 DU Shuya;WANG Xudong;DONG Yonghao;LYU Jiachen;LI Jie(School of Environment and Municipal Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China;Key Laboratory of Membrane Separation in Shaanxi Province,Xi'an 710055,China;Beijing Beitou Sports Industry Co.Ltd.,Beijing 101100,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055 [2]陕西省膜分离重点实验室,西安710055 [3]北京北投体育产业有限公司,北京101100

出　　处：《功能材料》2024年第11期11137-11146,共10页Journal of Functional Materials

基　　金：陕西省重点科技创新团队计划项目(2024RS-CXTD-51)。

摘　　要：采用水热法和原位沉淀法合成了MOF/AgBr复合材料,应用于模拟太阳光照射下光催化降解盐酸四环素(TC-HCl)。结果表明,AgBr掺杂量为30%时,复合材料MOF/AgBr-3在可见光照射180 min后展示出较高的光催化活性,对TC-HCl的降解率达84.50%;拟一阶动力学拟合得出复合材料的反应速率常数约为0.0121/min,约为原始AgBr的6.1倍;MOF-808和AgBr之间构建的单光子激发途径提高了光生载流子传输和分离效率,拓宽了可见光响应范围,并实现了空穴(h^(+))和电子(e^(-))在空间上的有效分离;超氧自由基(·O_(2)^(-))和羟基自由基(·OH)是光催化反应的主要活性物种;该复合材料具有良好的稳定性,经5次循环后其光降解能力保持率高达84.35%;TC-HCl的降解途径包括自身的水解、脱氨基、去甲基、氧化和开环等过程。MOF/AgBr composite materials were synthesized using hydrothermal and in-situ precipitation methods,and applied to simulate the photocatalytic degradation of tetracycline hydrochloride(TC-HCl)under solar irradiation.The results showed that when the AgBr doping amount was 30%,the composite material MOF/AgBr-3 exhibited high photocatalytic activity after 180 minutes of visible light irradiation,with a degradation rate of 84.50%for TC-HCl.The reaction rate constant of the composite material is approximately 0.0121/min,which is about 6.1 times that of the original AgBr,according to the fitting of first-order kinetics.The single photon excitation pathway constructed between MOF-808 and AgBr improves the efficiency of photo generated carrier transport and separation,expands the visible light response range,and achieves effective separation of holes(h^(+))and electrons(e^(-))in space.Superoxide radicals(·O_(2)^(-))and hydroxyl radicals(·OH)are the main active species in photocatalytic reactions.This composite material has good stability,and after five cycles,its photodegradation ability retention rate is as high as 84.35%.The degradation pathways of TC-HCl include its own hydrolysis,deamination,demethylation,oxidation,and ring opening processes.

关 键 词：金属有机框架 可见光催化 盐酸四环素 异质结 中间产物 

分 类 号：X703[环境科学与工程—环境工程]