催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (4): 391-396.

• 研究论文 • 上一篇    下一篇

多孔二氧化钛微球的制备、表征及其光催化性能

王晓静1,刘超2,胡中华1,刘亚菲1,陈玉娟1,温祖标1   

  1. 1 同济大学化学系, 上海 200092; 2 石家庄经济学院宝石与材料工艺学院, 河北石家庄 050031
  • 收稿日期:2008-04-25 出版日期:2008-04-25 发布日期:2012-03-22

Preparation, Characterization and Photocatalytic Performance of Porous TiO2 Micro-beads

WANG Xiaojing1, LIU Chao2, HU Zhonghua1*, LIU Yafei1, CHEN Yujuan1, WEN Zubiao1   

  1. 1 Department of Chemistry, Tongji University, Shanghai 200092, China; 2 College of Gemmology and Material Technics, Shijiazhuang University of Economics, Shijiazhuang 050031, Hebei, China
  • Received:2008-04-25 Online:2008-04-25 Published:2012-03-22

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1586

被引次数

105

摘要： 以Lutensol TO(异构十三醇聚氧乙烯醚)系列非离子表面活性剂为辅助剂,采用溶胶-凝胶法制备了比表面积高、孔径分布窄的锐钛矿型TiO2多孔微球,并用透射电镜、扫描电镜、热重-差热分析、X射线衍射和氮吸附进行了表征. 以亚甲基蓝降解为模型反应评价了其光催化性能,并与商品化TiO2 Degussa P25进行了比较. 实验结果表明,样品在425 ℃焙烧后,形成具有孔状结构的锐钛矿型TiO2微球,粒径为0.7～1.0 μm, 比表面积为70.5 m2/g, 总孔容为0.12 cm3/g, 平均孔径为4.26 nm, 晶粒尺寸为12 nm. 这种多孔TiO2微球具有较高的催化活性,与Degussa P25纳米TiO2的催化活性相当.

关键词: 多孔二氧化钛微球, 光催化, 溶胶-凝胶法, 异构十三醇聚氧乙烯醚, 非离子表面活性剂

Abstract: Nanocrystal and porous TiO2 microbeads with high surface area and narrow pore size distribution were prepared by sol-gel technique in the presence of Lutensol TO series (iso-tridecanol) polyoxyethylene ether nonionic surfactants. The resultant TiO2 microbeads were characterized by TEM, SEM, TG-DSC, XRD, and N2 adsorption. The photocatalytic performance of TiO2 microbeads was evaluated through degradation of methylene blue and compared with the commercial Degussa P25 nano-TiO2. The results showed that at optimal treatment temperature of 425 ℃, anatase-type TiO2 microbeads with particle size of0.7-1.0μm were obtained. The microbeads have porous structure with a BET specific surface area of 70.5 m2/g, total pore volume of 0.12 cm3/g, average pore diameter of 4.26 nm, and crystal size of 12 nm. The TiO2 microbeads exhibited similar photocatalytic activity to Degussa P25 for the degradation of methylene blue.

Key words: porous titania microbead, photocatalysis, sol-gel method, iso-tridecanol polyoxyethylene ether, nonionic surfactant