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Silicon nanowires@Co3O4 arrays film with Z-scheme band alignment for hydrogen evolution

作     者:Lu, Kang-Qiang Lin, Xin Tang, Zi-Rong Xu, Yi-Jun 

作者机构:Fuzhou Univ Coll Chem State Key Lab Photocatalysis Energy & Environm Fuzhou 350116 Fujian Peoples R China Fuzhou Univ Coll Chem New Campus Fuzhou 350116 Fujian Peoples R China 

出 版 物:《CATALYSIS TODAY》 (Catal Today)

年 卷 期:2019年第335卷

页      面:294-299页

核心收录:

学科分类:081704[工学-应用化学] 07[理学] 0817[工学-化学工程与技术] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0703[理学-化学] 

基  金:National Natural Science Foundation of China [U1463204, 21872029, 20903023, 21173045] Award Program for Minjiang Scholar Professorship Independent Research Project of State Key Laboratory of Photocatalysis on Energy and Environment [2014A05] 1st Program of Fujian Province for Top Creative Young Talents Natural Science Foundation (NSF) of Fujian Province for Distinguished Young Investigator Rolling Grant [2017J07002] Program for Returned High-Level Overseas Chinese Scholars of Fujian province 

主  题:Silicon nanowires Composites Charge transfer 1D arrays Band alignment 

摘      要:Photocatalytic water splitting for hydrogen evolution provides an attractive strategy for clean, low-cost, and environment-friendly production of hydrogen from solar energy. Here, the film composite of Co3O4 nanoparticles decorated well-defined one-dimensional (1D) silicon nanowires arrays (SiNWs@Co3O4) are constructed by employing SiNWs arrays as a building block via a facile calcination approach. In comparison with bare SiNWs arrays, the resultant SiNWs@Co3O4 arrays composite exhibits distinctly enhanced photocatalytic performance for the evolution of hydrogen. The enhanced photoactivity is attributed to the formation of a direct Z-scheme band alignment in the SiNWs@Co3O4 film composite, which results in an improved spatial separation and migration of photoinduced electron-hole pairs as compared to bare SiNWs under light irradiation. Our work is anticipated to promote ongoing interest in the design of high-performance artificial 1D-based Z-scheme film photocatalysts with enhanced performance.

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