Citation: Chen Zhao, Zhihua Wang, Xi Chen, Hongyu Chu, Huifen Fu, Chong-Chen Wang. Robust photocatalytic benzene degradation using mesoporous disk-like N-TiO₂ derived from MIL-125(Ti)[J]. Chinese Journal of Catalysis, ;2020, 41(8): 1186-1197. doi: S1872-2067(19)63516-3 shu

Robust photocatalytic benzene degradation using mesoporous disk-like N-TiO₂ derived from MIL-125(Ti)

Chen Zhao ^a,b, ,
Zhihua Wang ^a ,
Xi Chen ^b ,
Hongyu Chu ^b ,
Huifen Fu ^b ,
Chong-Chen Wang ^b

a State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
b Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation, Beijing University of Civil Engineering and Architecture, Beijing 100044, China

Received Date: 26 November 2019
Revised Date: 23 December 2019

Fund Project: This work was supported by the National Natural Science Foundation of China (21876008, 51578034 and 51878023), Great Wall Scholars Training Program Project of Beijing Municipality Universities (CIT&TCD20180323), Project of Construction of Innovation Teams and Teacher Career Development for Universities and Colleges Under Beijing Municipality (IDHT20170508), Beijing Talent Project (2018A35), Fundamental Research Funds for Beijing Universities (X18075/X18076/X18124/X18125/X18276), and Scientific Research Foundation of Beijing University of Civil Engineering and Architecture (KYJJ2017033/KYJJ2017008).

N-doped anatase-rutile titanium dioxide (N-TiO₂) is a classical semiconductor widely used in environmental remediation. Its photocatalytic performance is typically affected by its morphology, porous structure, and phase composition. Herein, disk-like mesoporous N-TiO₂ was prepared by calcining MIL-125(Ti) and melamine matrix at different temperatures in air. The photocatalytic efficiency of the prepared mesoporous N-TiO₂ for the photo-oxidation of gaseous benzene under visible-light irradiation was studied. With respect to light absorption and mass transfer, as-prepared N-TiO₂ annealed at 500℃ (MM-500) showed the best photocatalytic activity with corresponding photodegradation and mineralization efficiencies of 99.1% and 72.0%, respectively. In addition, MM-500 exhibited excellent reusability and stability in cyclic experiments, in which 84.8% of gaseous benzene could still be photodegraded after 10 experimental cycles. Furthermore, electron spin resonance analysis indicated that ^·OH and ^·O₂^- radicals were the dominating reactive oxygen species during the photo-oxidation process. Their excellent performance suggests that the as-prepared N-TiO₂ photocatalysts can be used to eliminate volatile organic compounds.
- Metal-organic framework,
- N-TiO₂,
- Visible light,
- Photocatalytic oxidation,
- Gaseous benzene
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Robust photocatalytic benzene degradation using mesoporous disk-like N-TiO2 derived from MIL-125(Ti)

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通讯作者: 陈斌, bchen63@163.com

Robust photocatalytic benzene degradation using mesoporous disk-like N-TiO₂ derived from MIL-125(Ti)