物理化学学报 >> 2013, Vol. 29 >> Issue (02): 403-410.doi: 10.3866/PKU.WHXB201211022

催化和表面科学 上一篇    下一篇

金红石相TiO2-石墨烯复合材料的制备及其光催化性能

甘永平, 秦怀鹏, 黄辉, 陶新永, 方俊武, 张文魁   

  1. 浙江工业大学化学工程与材料学院, 杭州 310014
  • 收稿日期:2012-09-11 修回日期:2012-11-01 发布日期:2013-01-14
  • 通讯作者: 张文魁 E-mail:msechem@zjut.edu.cn
  • 基金资助:

    浙江省自然科学基金(Y4110523, LY12E01003)资助项目

Preparation and Photocatalytic Activity of Rutile TiO2-Graphene Composites

GAN Yong-Ping, QIN Huai-Peng, HUANG Hui, TAO Xin-Yong, FANG Jun-Wu, ZHANG Wen-Kui   

  1. College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, P. R. China
  • Received:2012-09-11 Revised:2012-11-01 Published:2013-01-14
  • Supported by:

    The project was supported by the Natural Science Foundation of Zhejiang Province, China (Y4110523, LY12E01003).

摘要:

以鳞片石墨为原料, 用改进的Hummers法制备氧化石墨烯(GO), 以异丙醇钛为钛源经一步水热法制备得到金红石相TiO2-石墨烯复合材料(rGO-TiO2), 考察了氧化石墨烯用量对复合材料光催化性能的影响. 采用X射线衍射(XRD), 比表面积(BET), 透射电镜(TEM), 扫描电镜(SEM), 拉曼光谱, 紫外-可见(UV-Vis)吸收光谱和荧光光谱(PL)等测试手段对复合材料进行表征. 结果表明: 复合材料中TiO2为针簇状结构的金红石相, 与石墨烯能够均匀复合; 与纯金红石相TiO2相比, 复合材料具有较大的比表面积. 研究了该复合材料在紫外光下对罗丹明B 以及可见光下对甲基橙光降解效果. 当氧化石墨烯浓度为0.5 mg·mL-1时, 制备得到的复合材料rGO-TiO2具有较好的光催化效果.

关键词: 金红石TiO2, 石墨烯, 水热法, 光催化, 有机污染物

Abstract:

In this work, graphene oxide (GO) was prepared from natural flake graphite by the modified Hummers method. A series of composites consisting of rutile TiO2 and graphene (rGO-TiO2) were synthesized via a one-step hydrothermal reaction of graphene oxide and titanium isopropylate. The influence of the amount of graphene oxide on the photocatalytic activity of the rGO-TiO2 composites was studied. The photocatalysts were characterized by Brunauer-Emmett-Teller sorption (BET), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, UV-Vis absorbance spectroscopy, and photoluminescence (PL) spectroscopy. The as-formed TiO2 was formed in the rutile phase with a needle-cluster structure, and dispersed uniformly on the surface of graphene sheets. The composites possess higher specific areas than pure rutile TiO2. The photo-degradation performance of Rhodamine B and methyl orange by the rGO-TiO2 composites under ultraviolet and visible light was studied. The results indicated that rGO-TiO2 composites prepared with 0.5 mg·mL-1 of graphene oxide had the greatest photocatalytic activity.

Key words: Rutile TiO2, Graphene, Hydrothermal method, Photocatalysis, Organic pollutants

MSC2000: 

  • O643