催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (1): 31-36.

• 研究论文 • 上一篇    下一篇

中孔石墨碳负载TiO2复合材料光催化降解罗丹明B和苯酚

肖义1,党利琴1,安丽珍1,白士英1,雷志斌1,2   

  1. 1 辽宁师范大学化学化工学院功能材料化学研究所, 辽宁大连 116029; 2 福建省光催化重点实验室-省部共建国家重点实验室培育基地, 福建福州 350002
  • 收稿日期:2008-01-25 出版日期:2008-01-25 发布日期:2011-12-25

Photocatalytic Degradation of Rhodamine B and Phenol by TiO2 Loaded on Mesoporous Graphitic Carbon

XIAO Yi1, DANG Liqin1, AN Lizhen1, BAI Shiying1, LEI Zhibin1,2*   

  1. 1 Institute of Chemistry for Functionalized Materials, Faculty of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, Liaoning, China; 2 State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, Fujian, China
  • Received:2008-01-25 Online:2008-01-25 Published:2011-12-25

PDF

1224

被引次数

55

摘要： 以26 nm单分散的SiO2球为模板,苯乙烯为碳源, Ni为催化剂,在950 ℃合成了比表面积为298.2 m2/g的中孔石墨碳材料. 采用粉末X射线衍射、低温N2吸附、热重分析和透射电镜等对碳材料进行了结构表征. 结果发现,通过Ni的催化作用,可在较低温度下得到高度石墨化的中孔碳材料. 采用溶胶-凝胶法将TiO2负载在中孔石墨碳材料上,形成TiO2/石墨碳复合材料. 以罗丹明B和苯酚的光催化降解为探针反应,考察了TiO2/石墨碳复合材料的光催化降解活性. 结果表明,在紫外光照射下,罗丹明B和苯酚在该复合材料上的光催化降解反应遵循一级反应动力学,复合材料对罗丹明B和苯酚的光催化降解活性明显高于相同条件下制备的纯锐钛矿型TiO2.

关键词: 中孔碳, 催化石墨化, 二氧化钛, 罗丹明B, 苯酚, 光降解

Abstract: Mesoporous graphitic carbon with high surface area (298.2 m2/g) was fabricated at 950 ℃ using monodisperse colloid SiO2 with diameter of 26 nm as the template, styrene as the carbon precursor, and Ni as the catalyst. The obtained carbon material was characterized by powderX-raydiffraction, N2 adsorption, thermogravimetric analysis, and transmission electron microscopy. The presence of Ni was crucial to the formation of graphitized mesoporous carbon. The TiO2/graphitic carbon composite was prepared by loading TiO2 in the mesopores of the graphitic carbon via the sol-gel method. Both the surface area and pore volume of the composite were significantly reduced in contrast to the mesoporous graphitic carbon. The photoactivity of TiO2/graphitic carbon was investigated by photocatalytic degradation aqueous solutions of rhodamine B and phenol. The degradation of both rhodamine B and phenol followed first-order reaction kinetics, and the composite showed higher photoactivity than the pure anatase TiO2.

Key words: mesoporous carbon, catalytic graphitization, titania, rhodamine B, phenol, photodegradation