Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/12060
Title: A comparative study of preparation methods of nanoporous TiO2 films for microfluidic photocatalysis
Authors: Wang, N
Lei, L
Zhang, XM 
Tsang, YH 
Chen, Y
Chan, HLW 
Keywords: Microfluidics
Photocatalysis
Planar reactor
TiO2 film
Issue Date: 2011
Source: Microelectronic engineering, 2011, v. 88, no. 8, p. 2797-2799 How to cite?
Journal: Microelectronic Engineering 
Abstract: This paper presents a comparative study of three methods for preparing integrated nanoporous TiO2 films for microfluidic based photocatalytic reactors. These porous films have inherent merit of large surface-to-volume ratio and should significantly improve the device photoreactivity. It is also expected that nanoporous thin films have different performance in microfluidic chambers from that in an open environment. Experimentally, films produced by water-based P25 TiO2 colloids and alcohol-based P25 TiO2 colloids as well as tetrabutyl titanate sol-gel have been implemented into both microfluidic chambers and bulk containers for a close comparison using photocatalytic induced degradation of methylene blue model chemical. The results show that although the water-based P25 method produces TiO2 films with lower performance than the alcohol-based P25 method in the bulk container, it achieves the highest reaction rate in the microreactor (1.4% s-1, 17% higher than the alcohol-based P25 method and seven times higher than the TBT synthesis method). Such comparison suggests that the water-based P25 method may be a good choice for the microreactor.
URI: http://hdl.handle.net/10397/12060
ISSN: 0167-9317
DOI: 10.1016/j.mee.2010.12.051
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