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材料研究学报  2007, Vol. 21 Issue (3): 245-249    
  论文 本期目录 | 过刊浏览 |
介孔SO42-/TiO2的一步法制备及其光催化性能
罗妮  沈俊  田从学  张昭
引用本文:

罗妮; 沈俊; 田从学; 张昭 . 介孔SO42-/TiO2的一步法制备及其光催化性能[J]. 材料研究学报, 2007, 21(3): 245-249.

全文: PDF(611 KB)  
摘要: 通过对TiOSO4溶液热水解用一步法制备出大比表面积、高活性的介孔SO42-/TiO2光催化剂.用低温氮吸附-脱附等温线、XRD、Hammett指示剂、艾氏卡等方法对SO42-/TiO2催化剂进行了表征,以亚甲基蓝的光催化氧化降解反应考察了催化剂的光催化性能.结果表明,在焙烧过程中硫酸根和偏钛酸孔壁上的自由羟基键合,不仅有效地抑制了TiO2晶粒的长大和晶相转变,而且起到了孔结构形成的导向及支撑作用,使TiO2保持了介孔结构、较高的比表面积和锐钛矿相,同时S=O键的强电子诱导效应还使邻近的Ti成为超强酸中心,促进了TiO2光生电子-空穴对的分离,延长了电子-空穴对的寿命,从而有效地提高了TiO2的光催化活性.
Key words
收稿日期: 1900-01-01     
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