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Synthesis of Mesoporous TiO2−xNx Spheres by Template Free Homogeneous Co-precipitation Method and their Photo-catalytic Activity under Visible Light Illumination

IR@IMMT: CSIR-Institute of Minerals and Materials Technology, Bhubaneswar

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Title Synthesis of Mesoporous TiO2−xNx Spheres by Template Free Homogeneous Co-precipitation Method and their Photo-catalytic Activity under Visible Light Illumination
 
Creator Parida, K M
Naik, B
 
Subject Mesoporous Materials
 
Description The article presents preparation, characterization and catalytic activity evaluation of an efficient nitrogen doped mesoporous titania sphere photo-catalyst for degradation of methylene blue (MB) and methyl orange (MO) under visible light illumination. Nitrogen doped titania was prepared by soft chemical route i.e. template free, low and controlled homogeneous co-precipitation from titanium oxysulfate sulfuric acid complex hydrate, urea, ethanol and water. The molar composition of TiOSO4 to urea was varied to prepare different atomic % nitrogen doped titania. Mesoporous anatase TiO2−xNx spheres with average crystallite size of 10 nm and formation of titanium oxynitride center were confirmed from HRTEM, XRD and XPS study. UV–vis DRS showed a strong absorption in the range of 400–500 nm which supports its use in visible spectrum of light. Nitrogen adsorption–desorption study supports the porous nature of the doped material. All the TiO2−xNx samples showed higher photo-catalytic activity than Degussa P25 and undoped mesoporous titania. Sample containing around one atomic % nitrogen showed highest activity among the TiO2−xNx samples.
 
Publisher Elsevier
 
Date 2009
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://eprints.immt.res.in/49/1/Parida1.pdf
Parida, K M and Naik, B (2009) Synthesis of Mesoporous TiO2−xNx Spheres by Template Free Homogeneous Co-precipitation Method and their Photo-catalytic Activity under Visible Light Illumination. Journal of Colloid and Interface Science, 333 (1). pp. 269-276.
 
Relation http://dx.doi.org/10.1016/j.jcis.2009.02.017
http://eprints.immt.res.in/49/