Enhanced photocatalytic and photoelectrochemical activities of SnO2/SiC nanowire heterostructure photocatalysts
Enhanced photocatalytic and photoelectrochemical activities of SnO2/SiC nanowire heterostructure photocatalysts
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DOI：
10.1016/j.jallcom.2015.10.269
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发表时间：
2016-02-15
影响因子：
6.2
通讯作者：
Li, Ye
中科院分区：
文献类型：
--
作者：
Liao, Xin;Chen, Jianjun;Li, Ye
采用溶剂热法制备了SnO 2/SiC纳米线异质结构光催化剂。对SnO 2/SiC异质结构的微观结构、形貌和光学特性进行了表征。在模拟太阳光照射下，研究了该复合光催化剂的光催化和光电化学分解水反应。复合光催化剂的最高析氢速率为274 μ mol g（-1）h（-1），约为未掺杂SiC纳米线的4倍。混合SnO 2/SiC光电极的光电化学分解水的性能也显着增强相比，原始的SiC纳米线光电极。在0.6V偏压下，SnO 2/SiC纳米线阴极的电流密度为62.0mA·cm（-2），是未掺杂SiC纳米线光电极的6.9倍。SnO 2/SiC纳米线的异质结构可以促进光生电荷的分离和转移，这是因为两种半导体的带边位置不同。(C)2015 Elsevier B. V.版权所有。
The SnO2/SiC nanowire heterostructure photocatalysts were successfully synthesized by a solvothermal synthesis process. The microstructural, morphological and optical properties of SnO2/SiC heterostructures were characterized. Photocatalytic and photoelectrochemical water splitting reactions of the hybrid photocatalyst were investigated under the simulated sunlight irradiation. The highest hydrogen evolution rate of the hybrid photocatalyst is 274 mu mol g(-1) h(-1), which is about 4 times than that of the pristine SiC nanowires. The photoelectrochemical water-splitting performance of the hybrid SnO2/SiC photoelectrode was also significantly enhanced compared with the pristine SiC nanowire photoelectrode. The current density of SnO2/SiC nanowires cathode is 62.0 mA cm(-2) at 0.6 V bias potential, which is 6.9 times than that of pristine SiC nanowire photoelectrode. The heterostructure of SnO2/SiC nanowires may facilitate the separation and transfer of photogenerated charges because the difference in the band edge positions of the two semiconductors. (C) 2015 Elsevier B.V. All rights reserved.