Novel silica gel supported TiO2 photocatalyst synthesized by CVD method

Ding, Zhe, Hu, Xijun, Lu, Gao Q., Yue, Po-Lock and Greenfield, Paul F. (2000) Novel silica gel supported TiO2 photocatalyst synthesized by CVD method. Langmuir, 16 15: 6216-6222.


Author Ding, Zhe
Hu, Xijun
Lu, Gao Q.
Yue, Po-Lock
Greenfield, Paul F.
Title Novel silica gel supported TiO2 photocatalyst synthesized by CVD method
Formatted title Novel silica gel supported TiO2 photocatalyst synthesized by CVD method
Journal name Langmuir   Check publisher's open access policy
Publication date 2000-07-25
Sub-type Article
DOI 10.1021/la000119l
Volume number 16
Issue number 15
ISSN 0743-7463
1520-5827
Start page 6216
End page 6222
Total pages 7
Place of publication Washington, DC, U.S.A.
Publisher American Chemical Society
Collection year 2000
Language eng
Subject C1
670707 Inorganic industrial chemicals
670903 Clay products
291804 Nanotechnology
250102 Chemistry of Catalysis
Formatted abstract TiO2 in anatase crystal phase is a very effective catalyst in the photocatalytic oxidation of organic compounds in water. To improve the recovery rate of TiO2 photocatalysts, which in most cases are in fine powder form, the chemical vapor deposition (CVD) method was used to load TiO2 onto a bigger particle support, silica gel. The amount of titania coating was found to depend strongly on the synthesis parameters of carrier gas flow rate and coating time. XPS and nitrogen ads/desorption results showed that most of the TiO2 particles generated from CVD were distributed on the external surface of the support and the coating was stable. The photocatalytic activities of TiO2/silica gel with different amounts of titania were evaluated for the oxidation of phenol aqueous solution and compared with that of Degussa P25. The optimum titania loading rate was found around 6 wt % of the TiO2 bulk concentration. Although the activity of the best TiO2/silica gel sample was still lower than that of P25, the synthesized TiO2/silica gel catalyst can be easily separated from the treated water and was found to maintain its TiO2 content and catalytic activity.
© 2000 American Chemical Society
Q-Index Code C1

 
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