The average size of titania decreased from 38.4 nm in pure TiO2 to 3.9 nm in SiO2/TiO2 with a SiO2/TiO2 molar ratio of 2/1. In addition, the photocatalytic activity decreased with the increase of rutile content.

 
  • 在纳米TiO2中复合SiO2能有效抑制锐钛矿向金红石的转变;增加锐钛矿的稳定性;并阻止TiO2晶粒的聚集生长.
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