CuS负载的二氧化钛纳米线的制备及其光催化性能研究
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- 英文论文题名：Preparation and Catalytic Activity of CuS sensitized Titania Nanowires
- 论文作者：祝文豪 ; 汪丽娜
- 英文论文作者：Wenhao Zhu ; Lina Wang ; Faculty of Science ; Zhejiang Sci-Tech University
- 年：2016
- 作者机构：浙江理工大学纳米科技研究中心浙江理工大学理学院;
- 论文关键词：TiO_2纳米线 ; CuS ; 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-第三十六分会：纳米材料合成与组装
- 语种：中文
- 分类号：O643.36;TB383.1
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十六分会 ; 纳米材料合成与组装
- 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：288k
- 原文格式：D
- 会议级别：全国
摘要
利用光催化技术降解有机污染物受到越来越多关注,TiO_2作为一个环保的廉价材料,是目前广泛研究的半导体光催化剂,但是TiO_2禁带宽度为3.2eV,在可见光范围内几乎无吸收,而且在光照下产生的电子-空穴极易复合,这就限制了其使用。为了提高TiO_2的光催化性能,本论文通过表面修饰的方法增强了TiO _2对光的响应范围,同时将其制成线状结构,这不仅增大了其比表面积,并且提高了光催化量子效率。本文在利用水热法制备出TiO_2纳米线基础上,通过溶剂热过程添加铜源(Cu SO_4)及硫源(Na S_2O_3),制备出TiO_2NW@CuS纳米复合材料。实验结果表明:通过Cu S与TiO_2纳米线的复合,使其在可见光范围内有较好的吸收,并其制备方法简单,且制备出的TiO_2纳米线及其复合物具有较高的稳定性,增大了其在催化领域的应用。
TiO_2 has been extensively investigated as one of the most promising candidates for water splitting, due to its high chemical stability, favorable band edge positions and inexpensive cost. However, the photocatalytic efficiency of TiO_2 is limited by its wide band gap energy, which is only sensitive to the UV light. Therefore, narrowing the band gap and prolonging the exciton life are the most challenge in the photo-catalytic utilization of TiO_2 though multiple strategies have been developed such as compositing TiO_2 with metal sulfides(Cu S). The TiO_2 nanowires were immersed into the mixed solution of Cu and S precursors and hydrothermally reacted for 10 h at different tem-perature in the oven to obtain the TiO_2@CuS nanostructures, and the UV-Vis tests showed that the nanostructures can enhance the visible light absorption.
TiO_2 has been extensively investigated as one of the most promising candidates for water splitting, due to its high chemical stability, favorable band edge positions and inexpensive cost. However, the photocatalytic efficiency of TiO_2 is limited by its wide band gap energy, which is only sensitive to the UV light. Therefore, narrowing the band gap and prolonging the exciton life are the most challenge in the photo-catalytic utilization of TiO_2 though multiple strategies have been developed such as compositing TiO_2 with metal sulfides(Cu S). The TiO_2 nanowires were immersed into the mixed solution of Cu and S precursors and hydrothermally reacted for 10 h at different tem-perature in the oven to obtain the TiO_2@CuS nanostructures, and the UV-Vis tests showed that the nanostructures can enhance the visible light absorption.
引文
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[2]Liu B.;Aydil E.S.J.Am.Chem.Soc.2009,131:985
[2]Liu B.;Aydil E.S.J.Am.Chem.Soc.2009,131:985