混合相二氧化钛石墨烯复合物的制备及光催化性能

doi:10.3866/PKU.WHXB201412291

物理化学学报 >> 2015, Vol. 31 >> Issue (3): 519-526.doi: 10.3866/PKU.WHXB201412291

混合相二氧化钛石墨烯复合物的制备及光催化性能

于建华¹, 范闽光^1,2, 李斌¹, 董丽辉¹, 张飞跃¹

1. 广西大学化学化工学院, 南宁 530004;
2. 广西石化资源加工及过程强化技术重点实验室, 南宁 530004

收稿日期:2014-10-27 修回日期:2014-12-26 发布日期:2015-03-06
通讯作者: 范闽光 E-mail:fanmg@gxu.edu.cn
基金资助:
国家重点基础研究发展规划项目(973) (2012CB21500203)及广西石化资源加工及过程强化技术重点实验室院长项目(2013K009, 2013Z001)资助

Preparation and Photocatalytic Activity of Mixed Phase TiO₂-Graphene Composites

YU Jian-Hua¹, FAN Min-Guang^1,2, LI Bin¹, DONG Li-Hui¹, ZHANG Fei-Yue¹

1. School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, P. R. China;
2. Guangxi Key Laboratory Petrochemical Rescource Processing and Process Intensification Technology, Nanning 530004, P. R. China

Received:2014-10-27 Revised:2014-12-26 Published:2015-03-06
Contact: FAN Min-Guang E-mail:fanmg@gxu.edu.cn
Supported by:
The project was supported by the National Key Basic Research Program of China (973) (2012CB21500203) and Dean Project of Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, China (2013K009, 2013Z001).

摘要/Abstract

摘要：

采用水热法制备了一系列混合相二氧化钛-石墨烯(TrG)的复合物, 并考察了石墨烯的用量对降解污染物甲基蓝的影响. 采用X射线衍射(XRD), 傅里叶变换红外(FTIR)光谱, 高分辨透射电镜(HRTEM), 拉曼光谱,紫外-可见漫反射吸收光谱(UV-Vis DRS), X射线光电子能谱(XPS)和比表面积(BET)等测试手段对复合材料进行表征. 结果表明, 复合材料中TiO₂为棒状的混合相, 且均匀分散在石墨烯表面. 由于石墨烯良好的吸光性能,混合相中的异质结和复合物的良好光电子传递能力以及高比表面积, 复合材料具有较高的光催化活性. 所制备的TrG复合材料在紫外光下降解甲基蓝的催化活性均高于纯TiO₂, 且当氧化石墨烯负载量为0.8% (质量分数,w)时, 复合材料TrG具有较好的光催化效果.

关键词: 混合相TiO₂, 异质结, 石墨烯, 光电子传递, 水热法, 光催化

Abstract:

A series of composites consisting of anatase-rutile TiO₂ and graphene (TrG) were synthesized by a hydrothermal route. The influence of the amount of graphene oxide on the photocatalytic activity during the degradation of methyl blue was studied. The photocatalysts were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, high-resolution transmission electron microscopy (HRTEM), Raman spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS), X-ray photoelectron spectroscopy (XPS), and Brunauer-Emmett-Teller (BET) specific surface area measurements. The results show that as-prepared TiO₂ formed in the anatase and rutile phase with a bar structure and it dispersed uniformly over the surface of the graphene sheets. The composites possess higher catalytic activity because of the strong absorption capacity of graphene, the establishment of heterojunctions between rutile and anatase TiO₂, the remarkable electrical transport between TiO₂ and graphene and the high specific surface areas. The photodegradation performance of methyl blue by the TrG composites under UV light was studied. Our results indicate that the photocatalytic activities of titanium dioxide-graphene composites were higher than those of pure TiO₂. We also found that the TrG composites prepared with a loading of 0.8%(mass fraction, w) graphene oxide had the best photocatalytic activity.

Key words: Mixed phase TiO₂, Heterojunction, Graphene, Photoelectron transfer, Hydrothermal route, Photocatalysis

于建华, 范闽光, 李斌, 董丽辉, 张飞跃. 混合相二氧化钛石墨烯复合物的制备及光催化性能[J]. 物理化学学报, 2015, 31(3), 519-526. doi: 10.3866/PKU.WHXB201412291

YU Jian-Hua, FAN Min-Guang, LI Bin, DONG Li-Hui, ZHANG Fei-Yue. Preparation and Photocatalytic Activity of Mixed Phase TiO₂-Graphene Composites[J]. Acta Phys. -Chim. Sin. 2015, 31(3), 519-526. doi: 10.3866/PKU.WHXB201412291

链接本文: https://www.whxb.pku.edu.cn/CN/10.3866/PKU.WHXB201412291

https://www.whxb.pku.edu.cn/CN/Y2015/V31/I3/519

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混合相二氧化钛石墨烯复合物的制备及光催化性能

Preparation and Photocatalytic Activity of Mixed Phase TiO₂-Graphene Composites

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混合相二氧化钛石墨烯复合物的制备及光催化性能

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Preparation and Photocatalytic Activity of Mixed Phase TiO₂-Graphene Composites