胶体碳球制备新型Sn/Se共掺杂TiO2及其光催化性能
Preparation of Novel Sn/Se Codoped TiO2 by Colloidal Carbon Spheres and Their Photocatalytic Properties
邢方莉 1李娜娜 1陈润东 1蒋兰 1谢辉1
作者信息
- 1. 贵州师范大学 化学与材料科学学院,贵州 贵阳 550000
- 折叠
摘要
TiO2的光催化性能改性是水污染治理和光催化领域研究的重点方向.为了增强TiO2 的光催化性能,以胶体碳球为模板,采用水热-煅烧法首次制备了TiO2空心球、硒掺杂二氧化钛(Se-TiO2)空心球和锡/硒共掺杂二氧化钛(Sn/Se-TiO2)空心球.同时,对Sn/Se-TiO2空心球的形貌、结构以及元素组成进行了表征,并以罗丹明B为模拟污染物,评价了样品的光催化性能.结果表明:TiO2为单一的锐钛矿相,Sn和Se成功地掺杂进入了TiO2 晶格中;Sn/Se共掺杂形成了缺陷能级,降低了禁带宽度和电子-空穴对的复合几率,提高了可见光的响应范围.当Se掺杂2.0%(物质的量分数,下同),Sn掺杂0.5%时,样品光催化性能最好,去除率为76.92%.同等条件下空心球的光催化去除率:TiO2<Se-TiO2<Sn/Se-TiO2,说明Sn/Se共掺杂TiO2空心球成功提高了TiO2的光催化性能.
Abstract
In this paper,TiO2 hollow spheres,Se-doped TiO2 hollow spheres and Sn/Se-doped TiO2 hollow spheres were prepared by hydrothermal-calcination method using colloidal carbon spheres as templates,in order to enhance the photocatalytic performance of TiO2.At the same time,the morphol-ogy,structure and elemental composition of Sn/Se-TiO2 hollow spheres were characterized.The photo-catalytic performance of the samples was evaluated by using Rhodamine B as a simulated pollutant.The results show that TiO2 is a single anatase phase,and Sn and Se are successfully doped into the TiO2 lattice.The Sn/Se co-doping results in the formation of defect levels,decreases the band gap width and the recombination probability of electron-hole pairs,and improves the response range of visi-ble light.When the Se doping amount is 2.0%and the Sn doping amount is 0.5%,the photocatalytic performance of the sample is the best,and the removal rate is 76.92%.Under the same conditions,the photocatalytic efficiency of hollow spheres is as follows:TiO2<Se-TiO2<Sn/Se-TiO2.The results indicated that the photocatalytic performance of TiO2 was improved by Sn/Se codoped hollow spheres.
关键词
二氧化钛/空心球/光催化/共掺杂/去除率Key words
TiO2/hollow sphere/photocatalytic/co-dope/removal rate引用本文复制引用
基金项目
贵州师范大学自然科学类博士科研项目(11904/0516034)
国家级大学生创新创业项目(202210663006)
出版年
2024
NETL
NSTL
万方数据