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化学学报
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化学学报 ›› 2003, Vol. 61 ›› Issue (1): 74-77. 上一篇    下一篇

研究论文

制备具有光催化活性的金红石相纳米氧化钛粉体

孙静;高濂;张青红   

  1. 中国科学院.上海(200050);中国科学院上海硅酸盐研究所高性能陶瓷与超微 结构国家重点实验室.上海(200050)
  • 发布日期:2003-01-15

Preparation of Nano Rutile Titania Powders with High Photocatalytic Properties

Sun Jing;Gao Lian;Zhang Qinghong   

  1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences.Shanghai(200050)
  • Published:2003-01-15

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被引次数

195 | 19

以TiCl4为原料，通过控制盐浓度和水解温度可以在温和条件下制备出晶粒尺 寸为6nm的金红石相氧化钛粉体，比表面积为175m^2/g。测定了粉体的X衍射、红外 和拉曼光谱。TEM照片显示粉体呈放射状颗粒，其粒径尺寸在200－400nm。苯酚的 光催化降解实验表明它比具有相同比表面积的锐钛矿粉体有更高的光催化活性。其 较大的团聚颗粒尺寸有利于光催化反应后的分离。

关键词: 光催化, 活性, 四氯化钛, 金红石, 纳米相材料, 氧化钛, 粉末, 反应, 苯酚, 降解

Rutile nano titania powders have been synthesized by the direct hydrolysis of TiCl_4 solutions under mild conditions. The crystalline size is about 6nm calculated from XRD data and the specific surface area is 175m~2/g. The powder was characterized by XRD, FT-IR and Raman spectra. TEM image shows that the round particle is about 200～400nm with small acicular at edge. It shows higher photocatalytic activity in the phenol degradation reaction than anatase that has very similar specific surface area. The agglomeration form of the prepared rutile titania with larger size of several hundred nano meters is very beneficial for further separation.

Key words: PHOTOCATALYSIS, ACTIVITY, TITANIUM TETRACHLORIDE, RUTILE, NANOPHASE MATERIALS, TITANIUM OXIDE, POWDER, REACTION, PHENOL, DEGRADATION

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