Citation: Chengjiang Zhang, Lijun Tian, Lianqin Chen, Xiaofang Li, Kangle Lv, Kejian Deng. One-pot topotactic synthesis of Ti³⁺ self-doped 3D TiO₂ hollow nanoboxes with enhanced visible light response[J]. Chinese Journal of Catalysis, ;2018, 39(8): 1373-1383. doi: 10.1016/S1872-2067(18)63106-7 shu

One-pot topotactic synthesis of Ti³⁺ self-doped 3D TiO₂ hollow nanoboxes with enhanced visible light response

a Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, 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: 11 December 2017
Revised Date: 13 May 2018

Fund Project: The work was supported by the National Natural Science Foundation of China (20702064, 21177161, 31402137), Hubei Province Science Fund for Distinguished Yong Scholars (2013CFA034) and the Program for Excellent Talents in Hubei Province (RCJH15001), the Opening Project of Key Laboratory of Green Catalysis of Sichuan Institutes of High Education (LYZ1107), and the Fundamental Research Funds for the Central University, South-Central University for Nationalities (CZP17077).

Ti³⁺ self-doped anatase three-dimensional (3D) TiO₂ hollow nanoboxes were synthesized via a topological transformation process involving template participation by a facile one-pot hydrothermal treatment with an ethanol solution of zinc powder and TiOF₂. It is worth noting that the 3D TiO₂ hollow nanoboxes are assembled from six single-crystal nanosheets and have dominant exposure of the {001} facets. It is found from EPR spectra that adding zinc powder is an environment-friendly and effective strategy to introduce Ti³⁺ and oxygen vacancy (O_v) into the bulk of 3D hollow nanoboxes rather than the surface, which is responsible for their enhanced visible photocatalytic properties. The photocatalytic activity was evaluated by measuring the formation rate of hydroxide free radicals using 7-hydroxycoumarin as a probe. The sample prepared with zinc/TiOF₂ mass ratio of 0.25 exhibited the highest RhB photodegradation activity under visible-light irradiation with a degradation rate of 96%, which is 4.0-times higher than that of pure TiO₂. The results suggest a novel approach to construct in-situ 3D hierarchical TiO₂ hollow nanoboxes doped with Ti³⁺ and O_v without introducing any impurity elements for superior visible-light photocatalytic activity.
- Ti³⁺ self-doped,
- Topological transformation,
- Three-dimensional hollow nanoboxes,
- Visible light response,
- Photocatalytic activity
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One-pot topotactic synthesis of Ti3+ self-doped 3D TiO2 hollow nanoboxes with enhanced visible light response

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通讯作者: 陈斌, bchen63@163.com

One-pot topotactic synthesis of Ti³⁺ self-doped 3D TiO₂ hollow nanoboxes with enhanced visible light response