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Catalysts 2016, 6(8), 117; doi:10.3390/catal6080117

Highly Crystallized C-Doped Mesoporous Anatase TiO2 with Visible Light Photocatalytic Activity

Center of Nanomaterials for Renewable Energy (CNRE), State Key Lab of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi′an Jiaotong University, Xi′an 710045, China
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Authors to whom correspondence should be addressed.
Academic Editor: Dionysios (Dion) Demetriou Dionysiou
Received: 14 April 2016 / Revised: 22 July 2016 / Accepted: 25 July 2016 / Published: 1 August 2016
(This article belongs to the Special Issue Photocatalytic Wastewater Treatment)
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Abstract

Highly crystallized C-doped mesoporous anatase TiO2 is prepared using a multi-walled carbon nanotube (MWCNT) mat as both a “rigid” pore template and a carbon doping source. SEM and TEM characterization shows that the MWCNT template imposed a pore structure in reverse of that of the MWCNT mat. The pore walls are formed by chain-like interconnected TiO2 nanocrystals with an average diameter about 10 nm, and pores are derived from spaces occupied by MWCNTs before removal. XRD characterization shows that TiO2 is crystallized with a pure anatase phase. XPS characterization reveals that the relative carbon content in the TiO2 is related to the duration of TiO2/MWCNT composite annealing before removal of MWCNT template. Three samples prepared contain 2.3%, 2.8% and 3.9% carbon; show a ~30 nm red shift and a plateau of adsorption from 450–800 nm in UV–Vis spectra in comparison to that of P25; and display visible light photocatalytic activity for decomposition of methyl orange (MO) in relationship with the carbon content and crystallinity of the anatase TiO2. View Full-Text
Keywords: TiO2; MWCNT; carbon doped; nanoparticles; mesoporous; catalysts; photocatalyst; photocatalysis TiO2; MWCNT; carbon doped; nanoparticles; mesoporous; catalysts; photocatalyst; photocatalysis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Xie, C.; Yang, S.; Shi, J.; Niu, C. Highly Crystallized C-Doped Mesoporous Anatase TiO2 with Visible Light Photocatalytic Activity. Catalysts 2016, 6, 117.

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