光催化
X射线光电子能谱
异质结
光电流
材料科学
制氢
化学工程
催化作用
碳纤维
光化学
复合数
化学
光电子学
复合材料
有机化学
工程类
作者
Mengxue Yang,You–Lin Wu,Yueyang Zhang,Xin Li,Zhiliang Jin
标识
DOI:10.1016/j.jece.2023.110795
摘要
Due to its abundant carbon chemical bonds, large conjugated system and natural pore structure, graphdiyne (GD, CnH2n-2) shows great advantages in growth, assembly and performance regulation, and is a key material to promote innovative development in catalysis, energy and other fields. In this study, NiFe PBA cube was prepared by coprecipitate method, and then NiFe PBA/CuI/GD ternary composite photocatalyst was formed by tightly coating NiFe PBA and CuI with graphitylene material. In situ irradiated X-ray photoelectron spectroscopy characterizes the change in electron cloud density of a catalyst under illumination, so as to determine the series-type transfer path of photogenerated electrons between three single photocatalysts, thus revealing the formation of double S-scheme heterojunction. Photocurrent and fluorescence tests have confirmed that the photogenerated carriers in NiFe PBA/CuI/GD can be transferred rapidly and utilized efficiently to participate in the photocatalytic reaction under the action of strong interfacial electric field. In addition, the three-dimensional structure of NiFe PBA and CuI and the surface carbon layer synergistic effect to expand the utilization rate of visible light catalyst. This work provides a new idea for the construction of S-scheme heterojunction and the application of new carbon materials in the field of photocatalysis.
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