Citation: Liu Wen, Zhang Wei, Liu Mushi, Du Penghui, Dang Chenyuan, Liang Jialiang, Li Yunyi. Fabrication of niobium doped titanate nanoflakes with enhanced visible-light-driven photocatalytic activity for efficient ibuprofen degradation[J]. Chinese Chemical Letters, ;2019, 30(12): 2177-2180. doi: 10.1016/j.cclet.2019.07.050 shu

Fabrication of niobium doped titanate nanoflakes with enhanced visible-light-driven photocatalytic activity for efficient ibuprofen degradation

Liu Wen ^b,c ,
Zhang Wei ^a ,
Liu Mushi ^b ,
Du Penghui ^b ,
Dang Chenyuan ^b ,
Liang Jialiang ^a,*, ,
Li Yunyi ^a,*,

a.
Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment of Ministry of Education, Chongqing University, Chongqing 400044, China
b.
The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
c.
The Beijing Innovation Center for Engineering Science and Advanced Technology(BIC-ESAT), Peking University, Beijing 100871, China

liangjialiang@cqu.edu.cn

liyunyi@cqu.edu.cn

Received Date: 10 May 2019
Revised Date: 23 July 2019
Accepted Date: 24 July 2019
Available Online: 25 December 2019

Figures(4)

In this study, a novel class of niobium (Nb) doped titanate nanoflakes (TNFs) are fabricated through a onestep hydrothermal method. Nb doping affects the curving of titanate nanosheet, leading to the formation of nanoflake structure. In addition, Nb⁵⁺ filled in the interlayers of[TiO₆] alters the light adsorption property of pristine titanate. The band gap of Nb-TNFs is narrowed to 2.85 eV, while neat titanate nanotubes (TNTs) is 3.4 eV. The enhanced visible light adsorption significantly enhances the visible-lightdriven activity of Nb-TNFs for ibuprofen (IBP) degradation. The pseudo-first order kinetics constant for Nb-TNFs is calculated to be 1.04 h^-1, while no obvious removal is observed for TNTs. Photo-generated holes (h⁺) and hydroxyl radicals (^·OH) are responsible for IBP degradation. The photocatalytic activity of Nb-TNFs depends on pH condition, and the optimal pH value is found to be 5. In addition, Nb-TNFs exhibited superior photo-stability during the reuse cycles. The results demonstrated Nb-TNFs are very promising in photocatalytic water purification.
- Titanate,
- Niobium,
- Photocatalysis,
- Element doping,
- Ibuprofen
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