Citation: Ye Liu, Zhaozhong Xiao, Shuang Cao, Jinhui Li, Lingyu Piao. Controllable synthesis of Au-TiO₂ nanodumbbell photocatalysts with spatial redox region[J]. Chinese Journal of Catalysis, ;2020, 41(1): 219-226. doi: S1872-2067(19)63477-7 shu

Controllable synthesis of Au-TiO₂ nanodumbbell photocatalysts with spatial redox region

Ye Liu ^a,b, ,
Zhaozhong Xiao ^b,c ,
Shuang Cao ^b ,
Jinhui Li ^a ,
Lingyu Piao ^b

a School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China;
b CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, CAS Key Laboratory of Standardization and Measurement for Nanotechnology, Beijing 100190, China;
c School of chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

Received Date: 3 July 2019
Revised Date: 4 August 2019

Fund Project: This work was supported by the National Natural Science Foundation of China (21703046) and the National Key R&

Photocatalytic water splitting has increasingly attracted attention as one of the most useful methods of converting solar energy into chemical fuel. However, the undesirable reverse reaction significantly limits the enhancement of efficiency. Herein, we fabricated an Au nanorods/TiO₂ nanodumbbells structure photocatalyst (Au NRs/TiO₂ NDs) via a facile synthetic strategy, which has spatially separated oxidation and reduction reaction zones. Owing to the unique structure, the charge separation of these photocatalysts can be significantly improved and the reverse reaction can be efficiently inhibited. The photogenerated electrons were injected from the TiO₂ to the Au NRs, and a positively charged TiO₂ region and negatively charged Au region were formed under UV irradiation. An enhanced hydrogen production performance was obtained compared with that seen in normal Au-TiO₂ heterostructure. Under optimized conditions, the H₂-production rate can reach up to 60,264 μmol/g/h, about six times higher than previously reported Au/TiO₂ photocatalysts. Besides this, our work also demonstrates the key factors of precise synthesis of the Au NRs/TiO₂ NDs structure, which provides a new perspective and experience for the design of similar catalysts.
- Au nanorods,
- Dumbbell structure,
- Photocatalytic water splitting,
- Controllable synthesis
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Controllable synthesis of Au-TiO₂ nanodumbbell photocatalysts with spatial redox region