Enhanced photocatalytic water splitting of g-C3N4 loaded with Fe doped Co3O4 and Pt dual-cocatalysts

被引：27
作者：
Wang, Kailin [1 ]
Yang, Songyu [1 ]
Wu, Yan [1 ]
机构：
[1] China Univ Geosci, Fac Mat Sci & Chem, Engn Res Ctr Nanogeo Mat, Minist Educ, 388 Lumo Rd, Wuhan 430074, Peoples R China
来源：
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2022年 / 10卷 / 05期
基金：
中国国家自然科学基金;
关键词：
g-C3N4; Fe-Co3O4; Photocatalysis; Hydrogen production; Dual cocatalysts; HIGHLY-EFFICIENT; NANOSHEET; HETEROSTRUCTURE; HETEROJUNCTION; ELECTROLYTE; PERFORMANCE; GENERATION; INTERFACE; COMPOSITE; EVOLUTION;
D O I：
10.1016/j.jece.2022.108353
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Dual cocatalysts play an important role in photocatalytic water splitting to hydrogen production. In this paper, Fe-doped Co3O4 (Fe-Co3O4) and Pt were loaded on the surface of g-C3N4 to enhance the water photocatalytic splitting, in which Fe-Co3O4 was used as an oxidation cocatalyst to capture the photo-generated holes of g-C3N4, and Pt was used as a reduction cocatalyst to transfer photo-generated electrons. Under the irradiation of visible light, its hydrogen production rate reaches up to 3.015 mmol g(-1 )h(-1), which is 3.01 times higher than that of g-C3N4 loaded with Pt. Pt and Fe-Co3O4 dual cocatalysts not only promote the migration rate of photo-generated electrons and holes on the surface of g-C3N4 , but also improve the light absorption capacity of visible light. The interfacial electric field built from the p-n heterojunction of Fe-Co3O4 /g-C3N4 drives photo-generated electrons in Fe-Co3O4 flowing to the holes of g-C3N4, which further inhibiting the recombination of g-C3N4 photo-generated carriers. This work provides a reference for the development of high-efficiency photocatalyst and an effective support for the development of semiconductor cocatalyst.
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页数：10
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