Citation: Ting Wang, Wanwen Li, Dandan Xu, Xuanmin Wu, Liwei Cao, Jianxin Meng. Strong visible absorption and excellent photocatalytic performance of brown TiO₂ nanoparticles synthesized using one-step low-temperature process[J]. Chinese Journal of Catalysis, ;2017, 38(7): 1184-1195. doi: 10.1016/S1872-2067(17)62855-9 shu

Strong visible absorption and excellent photocatalytic performance of brown TiO₂ nanoparticles synthesized using one-step low-temperature process

Department of Chemistry, Jinan University, Guangzhou 510632, Guangdong, China

Received Date: 17 March 2017
Revised Date: 8 May 2017

Fund Project: This work was supported by Teamwork Project Funded by Guangdong Natural Science Foundation (S2013030012842).

We report a facile and modified sol-gel approach to synthesize brown TiO₂ nanoparticles at low temperature (100-600℃). The TiO₂ nanoparticles dried at 180 ℃ (TiO₂-180℃) possessed a small particle size (5.0 nm), large specific surface area (213.45 m²/g), and efficient response to broadband light over the entire ultraviolet-visible spectrum with a narrow band gap of 1.84 eV. In addition, TiO₂-180℃ exhibited the optimal reaction rate constant for the degradation of methylene blue (0.08287 mg/(L·min)), which is six times higher than that of the mixed rutile/anatase phase TiO₂ photocatalytic standard P25 (0.01342 mg/(L·min)). Furthermore, cycling photodegradation ex-periments confirmed the stability and reusability of this catalyst. The unique physicochemical properties resulting from the low-temperature preparation of TiO₂-180℃, including its broadband visible absorption associated with a high concentration of oxygen vacancies, large surface area, and enriched surface -OH/H₂O may be responsible for this excellent photocatalytic performance. The use of as-prepared TiO₂-180℃ for practical applications is expected after further optimization.
- Titanium dioxide,
- Visible light,
- Broadband absorption,
- Oxygen vacancy,
- Photocatalytic degradation
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沈阳化工大学材料科学与工程学院沈阳 110142

Strong visible absorption and excellent photocatalytic performance of brown TiO2 nanoparticles synthesized using one-step low-temperature process

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通讯作者: 陈斌, bchen63@163.com

Strong visible absorption and excellent photocatalytic performance of brown TiO₂ nanoparticles synthesized using one-step low-temperature process