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金属Ag负载于X状CeO2的制备及可见光催化性能
作者:郑小刚1 黄敏1 文静2 由耀辉1 刘勇1 付孝锦1 
单位:1. 内江师范学院化学化工学院 纳米功能材料技术与工程应用实验室 四川 内江 641100 2. 中国科学院青海盐湖研究所 盐湖资源综合高效利用重点实验室 西宁 810008 
关键词:X状二氧化铈 Ag负载 降解 光催化活性 
分类号:TQ13
出版年,卷(期):页码:2018,46(4):0-0
DOI:
摘要:
以三氯化铈(CeCl3)和尿素(CO(NH2)2)为原料,采用水热法制备X状CeO2 (X-CeO2),利用光沉积法制备Ag负载于X-CeO2的负载型催化剂Ag/X-CeO2。考察了X-CeO2的制备参数和催化剂Ag/X-CeO2对罗丹明(RhB)的可见光催化降解性能。结果表明:在Ce3+/urea计量比1:6、Ce3+/表面活性剂(PVP)质量比1:3、反应温度160 ℃和反应时间60 min条件下制备出长度20 μm、宽度4 μm的X-CeO2。金属Ag能够改善X-CeO2的可见光催化活性,Ag负载量8%的催化剂8-Ag/CeO2对RhB呈现出最好的光降解活性,循环使用5次后光催化活性轻微降低。这是因为金属Ag粒子的表面等离子体共振效应和Ce4+/Ce3+氧化还原对的协同作用提高了光生电子的快速移除和实现光电电子?空穴对的高效分离。
基金项目:
基金项目:国家自然科学基金项目(21506103,51608512)。
作者简介:
第一作者:郑小刚(1986—),男,博士,讲师。
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