直接Z型异质结BaCO_(3)/BaTiO_(3)@TiO_(2)光催化还原U(Ⅵ)性能与机理研究  

Performance and Mechanism of Photocatalytic Reduction on U(Ⅵ)by Direct Z-scheme Heterojunction BaCO_(3)/BaTiO_(3)@TiO_(2)

作　　者：李小燕 温馨 张益硕 吴兴农 刘小亮 黄希 LI Xiaoyan;WEN Xin;ZHANG Yishuo;WU Xingnong;LIU Xiaoliang;HUANG Xi(School of Nuclear Science and Engineering,East China University of Technology,Nanchang 330013,China;Jiangxi Engineering Research Center for Nuclear Radiation Detection and Application,Nanchang 330013,China)

机构地区：[1]东华理工大学核科学与工程学院,江西南昌330013 [2]江西省核辐射探测及应用工程技术研究中心,江西南昌330013

出　　处：《东华理工大学学报(自然科学版)》2025年第2期192-200,共9页Journal of East China University of Technology(Natural Science)

基　　金：国家自然科学基金项目(41761090,12005037,12105044);江西省研究生科技创新项目(YC2023-S563,YC2022-s614);核资源与环境国家重点实验室开放基金项目(2022NRE30)。

摘　　要：为了有效处理与回收含铀废水中的铀,减小其对生态环境的影响,采用简单的溶剂热法制备直接Z型异质结复合材料BaCO_(3)/BaTiO_(3)@TiO_(2)(简称ZBaTi),探究其在可见光下对溶液中U(Ⅵ)的去除性能,探讨溶液pH、ZBaTi投加量、反应时间等因素对去除U(Ⅵ)性能的影响。结果表明,在pH=4.0、ZBaTi质量浓度0.1 g/L、反应时间40 min、反应温度25℃、U(Ⅵ)初始质量浓度15.0 mg/L的条件下,自然光照射下对U(Ⅵ)的去除率达到95.74%,去除量为143.29 mg/g。还原动力学和活性物种捕获实验结果表明,ZBaTi材料在去除U(Ⅵ)的过程中,反应初始阶段是快速的还原过程,起主要作用的是光生电子和超氧自由基。The direct Z-type heterojunction BaCO_(3)/BaTiO_(3)@TiO_(2)(abbreviated as ZBaTi)composite was prepared by a simple solvothermal method,and its removal performance of U(Ⅵ)in solution under natural light was investigated.The effects of solution pH,composite dosage,initial mass concentration of U(Ⅵ)solution,and other factors on the removal performance were discussed.The results showed that under the conditions of pH was 4.0,ZBaTi dosage was 0.1 g/L,reaction time was 40 min,reaction temperature was 25℃,concentration of U(Ⅵ)was 15.0 mg/L and under natural light irradiation,the removal rate of U(Ⅵ)reached 95.74%,and the removal amount reached 143.29 mg/g.The kinetic analysis showed that the initial stage of the reaction was a rapid reduction process.The results of active species capture experiments showed that the photogenerated electrons and·O_(2)-play a major role in the photocatalytic removal of U(Ⅵ)by ZBaTi.

关 键 词：铀(Ⅵ) 直接Z型异质结 光催化 钛酸钡 二氧化钛 

分 类 号：O643.36[理学—物理化学] X703[理学—化学]