Preparation of high-concentration substitutional carbon-doped TiO2 film via a two-step method for high-performance photocatalysis

Jun Wu; Xudong Jiang; Yupeng Zhang; Qiang Fu; Chunxu Pan

doi:10.1039/C8RA07082B

Preparation of high-concentration substitutional carbon-doped TiO₂ film via a two-step method for high-performance photocatalysis

Jun Wu,

†^a Xudong Jiang,†^b Yupeng Zhang,*^c Qiang Fu^ad and Chunxu Pan

*^ad

Author affiliations

* Corresponding authors

^a School of Physics and Technology, MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan 430072, China
E-mail: cxpan@whu.edu.cn

^b Department of Conservation, Hubei Provincial Museum, Wuhan 430077, China

^c College of Electronic Science and Technology, Shenzhen University, Shenzhen 518000, China
E-mail: ypzhang@szu.edu.cn

^d Center for Electron Microscopy, Wuhan University, Wuhan 430072, China

Abstract

In this paper, we present a facile two-step method for preparing a high-concentration substitutional carbon-doped TiO₂ (TiO_2−xC_x) film. First, the titanium substrate undergoes gas carburizing, followed by micro-arc oxidation (MAO) to form a carbon-doped TiO₂ film on the surface. The process can be described as direct oxidation of titanium carbide (O→TiC_x). The experimental results reveal that compared with traditional thermal annealing, this process could increase the carbon doping concentration to 6.07 at% and x to 0.24 in TiO_2−xC_x. The TiO_2−xC_x film exhibits a significant red-shift in the band-gap transition, a narrow band gap of 2.77 eV, and excellent photocatalytic performance, more than two times higher than that of undoped TiO₂ film. This method is simple, efficient, economical, environmentally friendly, and adapts to mass production. This experimental strategy can also be used in preparing other doped elements.

Article information

https://doi.org/10.1039/C8RA07082B

Article type

Paper

Submitted

24 Aug 2018

Accepted

17 Oct 2018

First published

30 Oct 2018

This article is Open Access

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RSC Adv., 2018,8, 36691-36696

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Preparation of high-concentration substitutional carbon-doped TiO₂ film via a two-step method for high-performance photocatalysis

J. Wu, X. Jiang, Y. Zhang, Q. Fu and C. Pan, RSC Adv., 2018, 8, 36691 DOI: 10.1039/C8RA07082B

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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Preparation of high-concentration substitutional carbon-doped TiO₂ film via a two-step method for high-performance photocatalysis

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Preparation of high-concentration substitutional carbon-doped TiO₂ film via a two-step method for high-performance photocatalysis

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