CeO_2/TiO_2空心球异质结的构建及光催化活性
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- 英文论文题名：Construction and Photocatalytic Activity of CeO_2/TiO_2 Hollow Sphere Heterostructure
- 论文作者：孙彬 ; 孙学凤 ; 高婷婷 ; 周国伟
- 英文论文作者：Bin Sun ; Xuefeng Sun ; Tingting Gao ; Guowei Zhou ; Key Laboratory of Fine Chemicals in Universities of Shandong ; School of Chemistry and Pharmaceutical Engineering ; Qilu University of Technology
- 年：2016
- 作者机构：齐鲁工业大学化学与制药工程学院山东省高校轻工精细化学品重点实验室;
- 论文关键词：TiO2空心球 ; CeO2/TiO2空心球异质结 ; 甲基橙 ; 光催化
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十七分会：光化学
- 语种：中文
- 分类号：TB332;O643.36
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十七分会 ; 光化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：243k
- 原文格式：D
- 会议级别：全国
摘要
TiO_2空心球因其具有较大的比表面积、吸附能力强和渗透性好等优点,而被广泛应用于光催化领域[1]。但是,TiO_2纳米材料作为一种宽禁带半导体材料,存在对太阳光利用率低、电子迁移率低等问题,使其应用受到限制。为了解决上述问题,可以从抑制电子-空穴复合和扩展光吸收范围两个方面来改善其光催化效果[2]。本文通过在TiO_2空心球表面与窄带隙半导体CeO2复合,构建了CeO_2/TiO_2空心球异质结纳米材料(Fig.1a,b)。在紫外光和可见光下对甲基橙光催化降解,结果显示CeO_2/TiO_2空心球异质结提高了光催化降解效率和拓展了可见光吸收(Fig.1c,d)。
TiO_2 hollow spheres have been widely used in the field of photocatalytic for their large specific surface area, strong adsorption ability and good penetration ability. But, TiO2_ nanomaterials, as a kind of wide band gap semiconductor materials, have many disadvantages including low efficiency in use of solar energy and low mobility of electron, it has restricted in the field of application. In the paper, CeO_2/TiO_2 hollow sphere heterostructures were prepared by composite of TiO_2 hollow spheres and narrow band gap semiconductor CeO_2. In photocatalytic degradation of methyl orange under UV light and visible light irradiation, the results showed that CeO_2/TiO_2 hollow sphere heterostructures improved photocatalytic degradation effect and expanded the visible absorption.
TiO_2 hollow spheres have been widely used in the field of photocatalytic for their large specific surface area, strong adsorption ability and good penetration ability. But, TiO2_ nanomaterials, as a kind of wide band gap semiconductor materials, have many disadvantages including low efficiency in use of solar energy and low mobility of electron, it has restricted in the field of application. In the paper, CeO_2/TiO_2 hollow sphere heterostructures were prepared by composite of TiO_2 hollow spheres and narrow band gap semiconductor CeO_2. In photocatalytic degradation of methyl orange under UV light and visible light irradiation, the results showed that CeO_2/TiO_2 hollow sphere heterostructures improved photocatalytic degradation effect and expanded the visible absorption.
引文
[1]Leshuk,T.;Linley,Stuart.;Baxter,George.;Gu,Frank.ACS Appl.Mater.Interfaces,2012,4:6062.
[2]Wang,M.;Hu,Y.;Han,J.;Guo,R.;Xiong,H.;Yin,Y.J.Mater.Chem.A,2015,3:20727.
[2]Wang,M.;Hu,Y.;Han,J.;Guo,R.;Xiong,H.;Yin,Y.J.Mater.Chem.A,2015,3:20727.