改性钨酸铋纳米材料用于六价铬与环丙沙星光催化共降解研究  

Modified Bismuth Tungstate Nanomaterials for Photocatalytic Codegradation of Hexavalent Chromium and Ciprofloxacin

作　　者：于涛[1] 赵瑞暄 聂瑀 谭欣[2] Yu Tao;Zhao Ruixuan;Nie Yu;Tan Xin(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China;School of Environmental Science and Engineering,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学化工学院,天津300350 [2]天津大学环境科学与工程学院,天津300350

出　　处：《天津大学学报（自然科学与工程技术版）》2024年第9期958-966,共9页Journal of Tianjin University：Science and Technology

基　　金：国家自然科学基金资助项目(22066022).

摘　　要：抗生素与重金属离子常在废水中共存,提高了废水处理难度,因此亟需高效的处理方法实现二者的共降解.在此,通过一种简单的溶剂热法合成了具有氧空位和3D中空结构钨酸铋光催化材料,实现了六价铬和环丙沙星的高效光催化共降解,光催化反应40 min后可将二者降解99%.实验及表征结果表明,氧空位的引入促进了光生载流子的分离与迁移,使得更多的电子和空穴参与氧化还原反应,进而显著提高了光催化共降解效率.同时,结合降解转化产物检测结果,分析了降解机理与路径.本工作为抗生素/重金属共存废水的处理提出了一种可行的高效方法.The coexistence of antibiotics and heavy metal ions in wastewater often makes wastewater treatment challenging;therefore,efficient treatment methods are urgently needed to achieve the codegradation of both.Herein,a bismuth tungstate photocatalytic material with oxygen vacancies and hollow 3D structures was synthesized using a simple solvothermal method to achieve efficient photocatalytic codegradation of hexavalent chromium and ciprofloxacin,and the concentration of both could be reduced by 99%after 40 min of photocatalytic degradation reaction.The experimental and characterization findings revealed that the introduction of oxygen vacancies promoted the separation and migration of photogenerated carriers,enabling more electrons and holes to participate in the redox reaction and considerably improve the photocatalytic degradation efficiency of the material.Meanwhile,the degradation mechanism and pathway were analyzed in combination with the detected transformation products.This work offers a prospective method for efficiently treating antibiotics and heavy metals coexisting in wastewater.

关 键 词：钨酸铋 光催化降解 六价铬 环丙沙星 

分 类 号：X505[环境科学与工程—环境工程] O644.1[理学—物理化学] O643.36[理学—化学]