Preparation and Characterization of La-CdS/TiO2 Photocatalyst

GAO Hongtao; LIU Yuanyuan

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Preparation and Characterization of La-CdS/TiO2 Photocatalyst

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- Preparation and Characterization of La-CdS/TiO2 Photocatalyst
- Acta Scientiarum Naturalium Universitatis SunYatseni Vol. 50, Issue 1, Pages: 85-88(2011)
- 作者机构：
  
  1. ．济宁学院化学与化工系，山东曲阜,273155
  2. 2．青岛科技大学生态化工教育部重点实验室,山东,青岛,266042
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2011，
  
  Published Online：25 January 2011，
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GAO Hongtao, LIU Yuanyuan. Preparation and Characterization of La-CdS/TiO2 Photocatalyst. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 50(1):85-88(2011)
DOI：

GAO Hongtao, LIU Yuanyuan. Preparation and Characterization of La-CdS/TiO2 Photocatalyst. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 50(1):85-88(2011) DOI：

摘要

采用金属掺杂和半导体复合两种方法结合制备La3+掺杂、CdS复合TiO2光催化剂。通过SEM、XRD和UV-DRS等对样品形貌、结构及光吸收性能进行了表征，并以甲基橙溶液为目标降解物考察了改性TiO2的光催化性能。结果表明，La-CdS/TiO2光催化剂在可见光区的吸收能力显著提高，光吸收发生明显红移，吸收边波长为452 nm；La3+掺杂降低了光生电子-空穴对的复合率，CdS复合扩展了光谱响应范围，光催化活性明显提高，光照15 min后，La-CdS/TiO2对甲基橙的降解率高达99%。

Abstract

The La-CdS/TiO2 photocatalysts were prepared using hydrothermal method by metal doping coupled with semiconductor composite method. The products were characterized by SEM

XRD and UVvisible DRS

respectively. The photocatalytic performances of samples were studied on the degradation of methyl orange (MO). It was found that the absorption of La-CdS/TiO2 enhanced significantly

both in ultraviolet and visible light region. And the absorption edge was 452 nm

which shifted to the low energies (visible light region). Compared to bare TiO2

La doping reduced combination rates of the electronhole pairs and the coupled of CdS improved the response of TiO2 to visible light

which resulted in the optical response enhancement. After being irradiated for 15 minutes

the degradation rate on MO for the La-CdS/TiO2 catalyst almost reached 99%.

关键词

镧掺杂CdS二氧化钛光催化活性

Keywords

La3+ dopingCdSTiO2photocatalytic activity

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