物理化学学报 >> 2014, Vol. 30 >> Issue (1): 141-149.doi: 10.3866/PKU.WHXB201311211

催化和表面科学 上一篇    下一篇

C@CdS/埃洛石纳米管复合光催化剂一步热解法的制备及光降解性能

邢伟男1, 倪良1, 颜学升2, 刘馨琳3, 罗莹莹1, 逯子扬1, 闫永胜1, 霍鹏伟1   

  1. 1 江苏大学化学化工学院, 江苏镇江 212013;
    2 江苏贝斯特环保科技工程有限公司, 江苏镇江 212013;
    3 江苏大学材料科学与工程学院, 江苏镇江 212013
  • 收稿日期:2013-07-15 修回日期:2013-11-20 发布日期:2014-01-01
  • 通讯作者: 霍鹏伟 E-mail:huopw@mail.ujs.edu.cn
  • 基金资助:

    国家自然科学基金(21207053),江苏省自然科学基金(SBK2011460),博士后科学基金(2011M500861,2012M511219,2011M500869)和江苏大学研究生创新项目(CXLX12_0634)资助

Preparation of C@CdS/Halloysite Nanotube Composite Photocatalyst Using One-Step Pyrolytic Method and Its Photodegradation Properties

XING Wei-Nan1, NI Liang1, YAN Xue-Sheng2, LIU Xin-Lin3, LUO Ying-Ying1, LU Zi-Yang1, YAN Yong-Sheng1, HUO Peng-Wei1   

  1. 1 School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu Province, P. R. China;
    2 JiangSu BeiSiTi Environmental Technology Project Co., Ltd., Zhenjiang 212013, Jiangsu Province, P. R. China;
    3 School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu Province, P. R. China
  • Received:2013-07-15 Revised:2013-11-20 Published:2014-01-01
  • Contact: HUO Peng-Wei E-mail:huopw@mail.ujs.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21207053), Natural Science Foundation of Jiangsu Province, China (SBK2011460), China Postdoctoral Science Foundation (2011M500861, 2012M511219, 2011M500869), and Program for Postgraduate Research Innovation in University of Jiangsu University, China (CXLX12_0634).

摘要:

通过一步热解法合成了一种新的复合光催化剂C@CdS/埃洛石纳米管(HNTs). 用扫描电镜(SEM),X射线能谱(EDS),透射电镜(TEM),X 射线衍射(XRD),紫外-可见漫反射光谱(UV-Vis DRS),傅里叶变换红外(FT-IR)光谱,比表面积和拉曼光谱(RS)对材料进行表征. 利用可见光下降解四环素探究了C@CdS/HNTs 的光催化活性. 结果表明,所制备的不同热解温度的样品中,400 ℃热解温度下的样品降解四环素效果最好,可见光照射60 min 降解率能达到86%. 此外,得益于碳层、CdS和HNTs 的共同作用,光催化剂展示了很好的稳定性. 放置一年对催化活性没有任何影响,并且经过三次循环实验,光催化剂活性没有很大变化. 最后讨论了光催化剂的制备机理,并且对光催化降解过程的中间产物进行了分析.

关键词: 硫化镉, 碳, 埃洛石纳米管, 光催化降解, 四环素, 重复性

Abstract:

A novel photocatalyst, C@CdS/halloysite nanotubes (HNTs), was synthesized using a facile and effective pyrolytic method. The as-prepared photocatalyst was characterized using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, specific surface area measurements, and X-ray energy dispersive, ultraviolet-visible diffuse reflectance, Fourier-transform infrared, specific surface area, and Raman spectroscopies. The photocatalytic activity of the sample was evaluated by the degradation of tetracycline (TC) under visible-light irradiation. The influence of different pyrolysis temperatures on the photocatalytic degradation of TC was investigated. The optimal pyrolysis temperature was found to be 400 ℃. The photodegradation rate reached 86% in 60 min under visible-light irradiation. In addition, benefiting from the common effects of carbon, CdS, and HNTs, the photocatalyst exhibited good chemical stability. After being laid aside for one year, the photocatalytic efficiency was unaffected and the photocatalyst retained its high catalytic activity after three catalytic cycles. Based on our experimental results, the preparation mechanism and degradation of the intermediate product of TC are discussed.

Key words: Cadmium sulfide, Carbon, Halloysite nanotube, Photocatalytic degradation, Tetracycline, Reusability

MSC2000: 

  • O643