Two-dimensional Sn2Ta2O7 nanosheets as efficient visible lightdriven photocatalysts for hydrogen evolution
来源期刊：Rare Metals2019年第5期
论文作者：Xiao-Shuai Wang Chao Zhou Run Shi Qin-Qin Liu Tie-Rui Zhang
文章页码：397 - 403
摘 要：Two-dimensional Sn2 Ta2 O7 nanosheets with a thickness of～10 nm were successfully prepared through a novel tantalic acid-based solid-state reaction method at reduced temperature. The as-obtained samples were characterized by powder X-ray diffraction（XRD）, ultraviolet–visible（UV–Vis） diffuse reflectance spectra, scanning electron microscopy（SEM）, transmission electron microscopy（TEM） and Brunauer–Emmett–Teller（BET） analysis. The photocatalytic performance of Sn2 Ta2 O7 nanosheets was evaluated by photocatalytic water splitting for hydrogen evolution under visible light irradiation（k C 400 nm）. The Sn2 Ta2 O7 nanosheets with a large surface area of 25.9 m2ág-1 showed higher H2 production activity,which was about 4.4 times higher than that of bulk Sn2 Ta2 O7 in lactic acid aqueous solutions using Pt as a cocatalyst. The improved photocatalytic performance mainly benefited from the nanosheet structure, which provided abundant surface active sites and facilitated the photogenerated charge carrier separation efficiently. This workmay open up new opportunity to develop novel nanostructured tantalum-based semiconductors with improved catalytic performance for solar energy conversion.
Xiao-Shuai Wang1,2，Chao Zhou2，Run Shi2，Qin-Qin Liu1，Tie-Rui Zhang2,3
1. School of Materials Science and Engineering, Jiangsu University2. Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences3. Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences
摘 要：Two-dimensional Sn2 Ta2 O7 nanosheets with a thickness of～10 nm were successfully prepared through a novel tantalic acid-based solid-state reaction method at reduced temperature. The as-obtained samples were characterized by powder X-ray diffraction（XRD）, ultraviolet–visible（UV–Vis） diffuse reflectance spectra, scanning electron microscopy（SEM）, transmission electron microscopy（TEM） and Brunauer–Emmett–Teller（BET） analysis. The photocatalytic performance of Sn2 Ta2 O7 nanosheets was evaluated by photocatalytic water splitting for hydrogen evolution under visible light irradiation（k C 400 nm）. The Sn2 Ta2 O7 nanosheets with a large surface area of 25.9 m2ág-1 showed higher H2 production activity,which was about 4.4 times higher than that of bulk Sn2 Ta2 O7 in lactic acid aqueous solutions using Pt as a cocatalyst. The improved photocatalytic performance mainly benefited from the nanosheet structure, which provided abundant surface active sites and facilitated the photogenerated charge carrier separation efficiently. This workmay open up new opportunity to develop novel nanostructured tantalum-based semiconductors with improved catalytic performance for solar energy conversion.
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