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Citation: WANG Yu-Dong, HAO Zhi-Xian, GAN Li-Hua, WANG Zi-Shen, CHEN Long-Wu. Photocatalytic Degradation of Pyridine by TiO₂/SiO₂ Aerogel[J]. Chinese Journal of Applied Chemistry, ;2004, 21(10): 1002-1005. shu

Photocatalytic Degradation of Pyridine by TiO₂/SiO₂ Aerogel

1.
Department of Chemistry, Tongji University, Shanghai 200092

Corresponding author: CHEN Long-Wu,
Received Date: 28 November 2003
Available Online: 20 February 2004
Fund Project: 上海市科技发展基金资助项目(0216nm035) (0216nm035)

TiO₂/SiO₂ aerogel was prepared by non supercritical drying process. The molar ratio of TiO₂ to SiO₂ was 1:3. After calcination at 500℃ the TiO₂/SiO₂ aerogel still had a high BET area(283.26 m²/g) and the pore diameter between 2~30 nm. The results of photocatalytic degradation of pyridine over the aerogel in weak acidic, neutral, and weak basic pyridine solution indicate that the aerogel is more active than TiO₂ powder. At pH=9, the TiO₂/SiO₂ aerogel shows the highest photocatalytic activity, and the degradation ratio of pyridine increases up to 97% when the reaction time is 6.5 h, compared to only 70% for TiO₂ powders.
- TiO₂/SiO₂ aerogel,
- photocatalytic degradation,
- pyridine
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Photocatalytic Degradation of Pyridine by TiO₂/SiO₂ Aerogel