Citation: Xuan Zhao, Yanting Du, Chengjiang Zhang, Lijun Tian, Xiaofang Li, Kejian Deng, Lianqing Chen, Youyu Duan, Kangle Lv. Enhanced visible photocatalytic activity of TiO₂ hollow boxes modified by methionine for RhB degradation and NO oxidation[J]. Chinese Journal of Catalysis, ;2018, 39(4): 736-746. doi: 10.1016/S1872-2067(18)63039-6 shu

Enhanced visible photocatalytic activity of TiO₂ hollow boxes modified by methionine for RhB degradation and NO oxidation

a Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, Hubei Province, South-Central University for Nationalities, Wuhan 430074, Hubei, China;
b College of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China

Received Date: 7 December 2017
Revised Date: 15 January 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (31402137, 51672312, 21373275), Hubei Province Science Fund for Distinguished Yong Scholars (2013CFA034), the Program for Excellent Talents in Hubei Province (RCJH15001), the Science and Technology Program of Wuhan (2016010101010018), and the Fundamental Research Funds for the Central University, South-Central University for Nationalities (CZP17077, CZP18016).

Hierarchical TiO₂ hollow nanoboxes (TiO₂-HNBs) assembled from TiO₂ nanosheets (TiO₂-NSs) show improved photoreactivity when compared with the building blocks of discrete TiO₂-NSs. However, TiO₂-HNBs can only be excited by ultraviolet light. In this paper, visible-light-responsive N and S co-doped TiO₂-HNBs were prepared by calcining the mixture of cubic TiOF₂ and methionine (C₅H₁₁NO₂S), a N-and S-containing biomacromolecule. The effect of calcination temperature on the structure and performance of the TiO₂-HNBs was systematically studied. It was found that methionine can prevent TiOF₂-to-anatase TiO₂ phase transformation. Both N and S elements are doped into the lattice of TiO₂-HNBs when the mixture of TiOF₂ and methionine undergoes calcination at 400℃, which is responsible for the visible-light response. When compared with that of pure 400℃-calcined TiO₂-HNBs (T400), the photoreactivity of 400℃-calcined methionine-modified TiO₂-HNBs (TM400) improves 1.53 times in photocatalytic degradation of rhodamine-B dye under visible irradiation (λ > 420 nm). The enhanced visible photoreactivity of methionine-modified TiO₂-HNBs is also confirmed by photocatalytic oxidation of NO. The successful doping of N and S elements into the lattice of TiO₂-HNBs, resulting in the improved light-harvesting ability and efficient separation of photo-generated electron-hole pairs, is responsible for the enhanced visible photocatalytic activity of methionine-modified TiO₂-HNBs. The photoreactivity of methionine modified TiO₂-HNBs remains nearly unchanged even after being recycled five times, indicating its promising use in practical applications.
- TiO₂ hollow nanoboxes,
- TiOF₂,
- Photocatalytic degradation,
- Rhodamine B,
- NO oxidation
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Enhanced visible photocatalytic activity of TiO2 hollow boxes modified by methionine for RhB degradation and NO oxidation

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通讯作者: 陈斌, bchen63@163.com

Enhanced visible photocatalytic activity of TiO₂ hollow boxes modified by methionine for RhB degradation and NO oxidation