Boron-doped nitrogen-deficient carbon nitride-based Z-scheme heterostructures for photocatalytic overall water splitting

doi:10.1038/s41560-021-00795-9

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题名:	Boron-doped nitrogen-deficient carbon nitride-based Z-scheme heterostructures for photocatalytic overall water splitting
作者:	Zhao, D.;Wang, Y.;Dong, C. L.;Huang, Y. C.;Chen, J.;Xue, F.;Shen, S.;Guo, and L.
日期:	2021-03-22
上传时间:	2023-04-28 17:36:55 (UTC+8)
出版者:	Nature Publishing Group
摘要:	Photocatalytic overall water splitting can be achieved using Z-scheme systems that mimic natural photosynthesis by combining dissimilar semiconductors in series. However, coupling well-suited H2- and O2-evolving components remains challenging. Here, we fabricate a Z-scheme system for photocatalytic overall water splitting based on boron-doped, nitrogen-deficient carbon nitride two-dimensional (2D) nanosheets. We prepare ultrathin carbon nitride nanosheets with varying levels of boron dopants and nitrogen defects, which leads to nanosheets that can act as either H2- or O2-evolving photocatalysts. Using an electrostatic self-assembly strategy, the nanosheets are coupled to obtain a 2D/2D polymeric heterostructure. Owing to their ultrathin nanostructures, strong interfacial interaction and staggered band alignment, a Z-scheme route for efficient charge-carrier separation and transfer is realized. The obtained heterostructure achieves stoichiometric H2 and O2 evolution in the presence of Pt and Co(OH)2 co-catalysts, and the solar-to-hydrogen efficiency reaches 1.16% under one-sun illumination.
關聯:	Nature Energy 6 ,p.388-397
DOI:	10.1038/s41560-021-00795-9
显示于类别:	[電機工程學系暨研究所] 期刊論文

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