Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/16015
Title: Performance improvement of TiO2 catalysts supported on adsorbents
Authors: LI GANG
Keywords: Photocatalysis, TiO2, supports, adsorption, photocatalytic activity, reuse
Issue Date: 9-Jun-2008
Source: LI GANG (2008-06-09). Performance improvement of TiO2 catalysts supported on adsorbents. ScholarBank@NUS Repository.
Abstract: TiO2 has been widely explored as a photocatalyst in wastewater treatment. However, its application has been largely impeded by the spontaneous aggregation in the reaction system and small surface area, resulting in the poor photocatalytic activity. In this thesis work, the spontaneous aggregation of TiO2 nanoparticles was investigated and two strategies, namely varying solution pH and surface modification by polyelectrolyte, were applied to prevent agglomeration. In addition, the TiO2 nanoparticles were supported on micro/meso porous materials to increase the surface area and subsequently enhance the photocatalytic activity. The non-porous silica spheres were also used as support to synthesize core/shell catalysts due to the easy light accessibility and less mass transfer resistance. The enhanced photoactivity can be achieved by monodisperse Pt particles on TiO2 shell. Furthermore, the synthesized photocatalyst can be separated from reaction media simply be sedimentation and the recycled catalyst remained good photoactivity.
URI: http://scholarbank.nus.edu.sg/handle/10635/16015
Appears in Collections:Ph.D Theses (Open)

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