CdS/TiO2复合纳米网的制备及光催化性能研究

doi:10.7517/j.issn.1674-0475.2018.03.008

影像科学与光化学 ›› 2018, Vol. 36 ›› Issue (3): 275-282.DOI: 10.7517/j.issn.1674-0475.2018.03.008

CdS/TiO₂复合纳米网的制备及光催化性能研究

李玥, 宋育泽, 陶雁忠, 高风仙, 汤宁

河南工程学院材料与化学工程学院, 河南郑州 450007

收稿日期:2017-08-15 修回日期:2017-09-15 出版日期:2018-05-15 发布日期:2018-05-15
通讯作者: 李玥
基金资助:
国家自然科学基金青年基金项目（51608175）、河南省教育厅科学技术研究重点项目（17B610004，15A150043）和河南工程学院博士基金项目（D2015020）资助

Facial Fabrication of CdS Nanoparticles Sensitized TiO₂ Nanomesh with Enhanced Photocatalytic Activity

LI Yue, SONG Yuze, TAO Yanzhong, GAO Fengxian, TANG Ning

Department of Material and Chemistry Engineering, Henan University of Engineering, Zhengzhou 450007, Henan, P. R. China

Received:2017-08-15 Revised:2017-09-15 Online:2018-05-15 Published:2018-05-15

摘要/Abstract

摘要： 采用阳极氧化法和连续离子层吸附方法，制备出高催化活性的CdS/TiO₂复合纳米材料并研究其催化活性。制得的CdS纳米粒子未堵塞管口并均匀地分布在TiO₂纳米网上。相对于未修饰的TiO₂纳米网，CdS/TiO₂复合催化剂大大改善了TiO₂对光的吸收并表现出更高的光催化活性。在光照120 min后，CdS/TiO₂复合纳米材料对亚甲基蓝的降解率为98.3%，远高于未修饰的TiO₂纳米网的71.3%。此外，通过光电流实验可知，当沉积CdS圈数为15圈时，CdS/TiO₂复合纳米材料的光电流最强。复合材料表现出比TiO₂更高的光催化活性可能是因为CdS是一个窄带隙的半导体，可增强TiO₂对可见光的吸收以及降低空穴和电子对的复合率。

关键词: 二氧化钛纳米网, 硫化镉, 复合纳米材料, 光催化

Abstract: CdS nanoparticles coated on TiO₂ mesh with high photocatalytic activity were successfully synthesized by a simple anodic oxidation method combined with continuous ion layer adsorption method. The CdS nanoparticles were evenly distributed on the top surface of the TiO₂ nanotubes without clogging the tube entrances. Compared with the unmodified TiO₂, the CdS/TiO₂ composited catalyst possessed extended light absorption region and highest photocatalytic activities. After 120 min of irradiation, MB was degraded with the removal ratio of 71.3% on the bare TiO₂ mesh, much lower than 98.3% on the CdS/TiO₂ composited catalyst. Furthermore, the highest photocurrents were obtained on CdS/TiO₂ composited catalyst when the depositing cycles of CdS reached to 15. The improved photodegradation efficiency on the composited catalyst mainly results from the enhanced visible-light absorption and lowest recombination rate of the electron-hole pairs due to the narrow-band-gap semiconductor of CdS.

Key words: TiO₂ mesh, CdS, nanocomposites, photocatalysis

李玥, 宋育泽, 陶雁忠, 高风仙, 汤宁. CdS/TiO₂复合纳米网的制备及光催化性能研究[J]. 影像科学与光化学, 2018, 36(3): 275-282.

LI Yue, SONG Yuze, TAO Yanzhong, GAO Fengxian, TANG Ning. Facial Fabrication of CdS Nanoparticles Sensitized TiO₂ Nanomesh with Enhanced Photocatalytic Activity[J]. Imaging Science and Photochemistry, 2018, 36(3): 275-282.

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CdS/TiO₂复合纳米网的制备及光催化性能研究

Facial Fabrication of CdS Nanoparticles Sensitized TiO₂ Nanomesh with Enhanced Photocatalytic Activity

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