标题：Ultrafine Si nanowires/Sn3O4 nanosheets 3D hierarchical heterostructured array as a photoanode with high-efficient photoelectrocatalytic performance
作者：Yang, Ruiqi ;Ji, Yanchen ;Li, Qiang ;Zhao, Zhenhuan ;Zhang, Ruitong ;Liang, Linlin ;Liu, Fan ;Chen, Yuke ;Han, Shuwei ;Yu, Xin ;Liu, Hong
作者机构：[Yang, Ruiqi ;Ji, Yanchen ;Zhang, Ruitong ;Liang, Linlin ;Liu, Fan ;Chen, Yuke ;Han, Shuwei ;Yu, Xin ;Liu, Hong ] Institute for Advanced Interdiscipli 更多
来源：Applied Catalysis B: Environmental
摘要：Constructing a high performance three-dimensional (3D) semiconductor photoelectrode for photoelectrocatalytic hydrogen (H2) production by water splitting is a promising method to resolve the current energy and environmental issues. Here, a ultrafine Si nanowires/Sn3O4 nanosheet (SiNWs/Sn3O4) 3D hierarchical heterostructured photoanode was synthesized via a facile approach with a metal-assisted chemical etching step following an in situ hydrothermal synthesis process. The ultrafine SiNWs/Sn3O4 3D hierarchical heterostructured photoanode exhibits significantly enhanced photoelectrochemical activity, and its photocurrent density is 8 times higher than that of single phase structures of SiNWs. This increase of catalytic activity may be attributed to the enhancement of the full-spectrum light absorption, decrease of the photocarrier recombination rate and a low transmission resistance at the catalyst/electrolyte interface. This work provides a novel design for preparing highly efficient Si based 3D heterostructured catalysts for the production of clean energy.
© 2019 Elsevier B.V.