Efficient visible-light-driven water oxidation by single-crystal Ta_(3)N_(5)nanoparticles  

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作  者:Zheng Wang Jeongsuk Seo Takashi Hisatomi Mamiko Nakabayashi Jiadong Xiao Shanshan Chen Lihua Lin Zhenhua Pan Mary Krause Nick Yin Gordon Smith Naoya Shibata Tsuyoshi Takata Kazunari Domen 

机构地区:[1]Research Initiative for Supra-Materials,Interdisciplinary Cluster for Cutting Edge Research,Shinshu University,4-17-1 Wakasato,Nagano-shi,Nagano 380-8553,Japan [2]Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China [3]Institute of Engineering Innovation,The University of Tokyo,2-11-16 Yayoi,Bunkyo-ku,Tokyo 113-8656,Japan [4]Global Advanced Metals Inc.,1223 County Line Road,Boyertown,PA 19512,USA [5]Office of University Professors,The University of Tokyo,2-11-16 Yayoi,Bunkyo-ku,Tokyo 113-8656,Japan

出  处:《Nano Research》2023年第4期4562-4567,共6页纳米研究(英文版)

基  金:supported by the Artificial Photosynthesis Project of the New Energy and Industrial Technology Development Organization(NEDO).Part of this work was conducted at the Advanced Characterization Nanotechnology Platform of the University of Tokyo,supported by the“Nanotechnology Platform”of the Ministry of Education,Culture,Sports,Science and Technology(MEXT),Japan(No.JPMXP09A-19-UT-0023).

摘  要:Ta3N5 is regarded as a promising photocatalyst for solar water splitting because of its excellent visible light absorption characteristics and simple composition.Conventional Ta3N5 photocatalysts prepared from oxide precursors typically comprise aggregated polycrystalline particles with defects and grain boundaries that reduce the water oxidation activity of the material.In the present work,well-dispersed Ta3N5 nanoparticulate single crystals were synthesized via a mild nitridation process using pure Ta metal nanopowder or Ta nanopowder mixed with NaCl.The resulting high-quality Ta3N5 nanoparticles,after loading with an oxygen evolution cocatalyst,exhibited impressively high photocatalytic performance during O_(2)evolution from a sacrificial AgNO3 solution,with an apparent quantum yield of 9.4%at 420 nm.Our findings suggest a new approach to the facile fabrication of nanostructured single-crystal photocatalysts for efficient solar water splitting,based on the use of metal nanopowders.

关 键 词:Ta3N5 photocatalyst nanoparticle single crystal O_(2)evolution metallic Ta precursor 

分 类 号:O64[理学—物理化学]

 

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