Citation: Chao Zhou, Run Shi, Lu Shang, Li-Zhu Wu, Chen-Ho Tung, Tierui Zhang. Two-step hydrothermal synthesis of Sn₂Nb₂O₇ nanocrystals with enhanced visible-light-driven H₂ evolution activity[J]. Chinese Journal of Catalysis, ;2018, 39(3): 395-400. doi: 10.1016/S1872-2067(17)62963-2 shu

Two-step hydrothermal synthesis of Sn₂Nb₂O₇ nanocrystals with enhanced visible-light-driven H₂ evolution activity

Chao Zhou ^a, ,
Run Shi ^a,b ,
Lu Shang ^a ,
Li-Zhu Wu ^a ,
Chen-Ho Tung ^a ,
Tierui Zhang ^a,b

a Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
b University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 27 September 2017
Revised Date: 29 October 2017

Fund Project: This work was supported by the Ministry of Science and Technology of China (2014CB239402, 2013CB834505), the National Key Projects for Fundamental Research and Development of China (2016YFB0600901, 2017YFA0206904, 2017YFA0206900), the National Natural Science Foundation of China (51772305, 51572270, U1662118, 21401207), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB17000000), and the Youth Innovation Promotion Association of the CAS.

We use a two-step hydrothermal method to successfully synthesize Sn₂Nb₂O₇ nanocrystals with an average size of approximately 20 nm. The as-obtained samples are characterized by powder X-ray diffraction, ultraviolet-visible diffuse reflectance spectroscopy, Brunauer-Emmett-Teller analysis, scanning electron microscopy, and transmission electron microscopy. The photocatalytic activity of the Sn₂Nb₂O₇ nanocrystals is evaluated by photocatalytic water splitting under visible light irradiation. The Sn₂Nb₂O₇ nanocrystals with a large surface area of 52.2 m²/g show an enhanced visible-light-driven photocatalytic H₂ production activity, approximately 5.5 times higher than that of bulk Sn₂Nb₂O₇ powder. The higher photocatalytic activity of Sn₂Nb₂O₇ nanocrystals is mainly attributed to its relatively high dispersity of nanosized particles and larger specific surface area when compared with the bulk powder.
- Hydrothermal synthesis,
- Sn₂Nb₂O₇,
- Photocatalysis,
- Water splitting,
- Visible-light-driven
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Two-step hydrothermal synthesis of Sn₂Nb₂O₇ nanocrystals with enhanced visible-light-driven H₂ evolution activity