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Title: Hybridising nitrogen doped titania with kaolinite: a feasible catalyst for a semi-continuous photo-degradation reactor system
Authors: Sia, Tze H.
Dai, Sheng
Jin, Bo
Biggs, Mark J.
Chong, Meng N.
Keywords: Hybrid nanocatalysts
Titanium dioxide
Nitrogen doping
Photocatalytic degradation
Semi-continuous photoreactor
Issue Date: 2015
Publisher: © Elsevier B.V.
Citation: SIA, T.H. et al., 2015. Hybridising nitrogen doped titania with kaolinite: a feasible catalyst for a semi-continuous photo-degradation reactor system. Chemical Engineering Journal, 279, pp. 939 - 947.
Abstract: The application of TiO2 catalyst for an industrial water treatment process is still limited due to its poor reusability, low oxidation efficiency and UV light use. Taking these challenges as the objective of this study, we integrated particle impregnation with nitrogen-doping methods to hybrid nitrogen doped TiO2 nanoparticles with kaolinite (NTK) as the photocatalyst for water treatment. SEM/TEM, XPS and XRD results revealed that the doped nitrogen in the NTK particle inclined toward interstitial, and the TiO2 nanocrystals were hybridised into the layered kaolinite minerals. Kaolinite was found to be an excellent TiO2 nanocatalyst supporter, providing promising adsorption transitions to not only sensitise TiO2 nanocrystals, but also enhance their photocatalytic oxidation capacity and recoverability. Kinetic studies showed that the NTK catalysts demonstrated a superior interfacial oxidation and photocatalytic degradation ability under visible light irradiation. Importantly, the NTK catalysts could be easily recovered for reuse with stable photo-degradation performance in a semi-continuous photoreactor process. The high degradation capacity, reusability and visible light accessibility of the NTK catalysts make the NTK-catalysed technology promising for industrial applications.
Description: This paper was accepted for publication in the journal Chemical Engineering Journal and the definitive published version is available at http://dx.doi.org/10.1016/j.cej.2015.05.101
Sponsor: BioNanotechnology Laboratory: Energy, Water and Materials at the University of Adelaide, Adelaide, Australia
Version: Published
DOI: 10.1016/j.cej.2015.05.101
URI: https://dspace.lboro.ac.uk/2134/18601
Publisher Link: http://dx.doi.org/10.1016/j.cej.2015.05.101
ISSN: 1385-8947
Appears in Collections:Published Articles (Chemistry)

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