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Mechanochemical preparation and application of graphdiyne coupled with cdSe nanoparticles for efficient photocatalytic hydrogen production

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chinese Journal of catalysis 2022年第10期43卷 2708-2719页

作者： Zhaobo Fan Xin Guo Mengxue Yang Zhiliang Jin School of chemistry and chemical Engineering Ningxia Key Laboratory of Solar Chemical Conversion TechnologyKey Laboratory for Chemical Engineering and TechnologyState Ethnic Affairs CommissionNorth Minzu UniversityYinchuan 750021NingxiaChina

Graphdiyne(GDY)has attracted considerable attention as a new two-dimensional(2D)carbon hybrid material because of its good conductivity,adjustable electronic structure,and special electron transfer enhancement *** has great potential in the field of photocatalytic water splitting for hydrogen evolution,owing to its unique *** this study,GDY was successfully prepared by the mechanochemical coupling of precursors c_(6)br_(6) and cac_(2) using a ball-milling *** prepared GDY,especially its microstructure and composition,was well characterized using different techniques such as X-ray diffraction,scanning electron microscopy,transmission electron microscopy,X-ray photoelectron spectroscopy(XPS),Fourier-transform infrared,and Raman characterization *** exploiting the unique two-dimensional(2D)structure and outstanding light absorption properties of GDY,GDY/cdSe 2D/0D heterojunctions were successfully established and applied to photocatalytic hydrogen *** hydrogen evolution activity of GDY/cdSe-20,a type of composite material,reached 6470μmol g^(-1) h^(-1),which is 461 and 40 times higher than that of GDY and cdSe,***,the fine electrical conductivity of GDY enabled rapid and effective transfer of the photogenerated electrons in cdSe into the hydrogen evolution *** transfer path of the photogenerated electrons was studied through XPS with in situ irradiation,and a reasonable mechanism for the hydrogen evolution reaction was *** study provides a feasible approach for the large-scale preparation of GDY and demonstrates the prospects of GDY in the field of photocatalysis.

关键词： Graphdiyne Mechanical ball-milling cac2 c6br6 Hydrogen evolution

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