Constructing S-scheme charge separation in cobalt phthalocyanine/oxygen-doped g-C3N4 heterojunction with enhanced photothermal-assisted photocatalytic H2 evolution

Wei-Long Shi ¹Zheng Xu ²Yu-Xing Shi ²Ling-Ling Li ²Jia-Lin Lu ²Xin-Hai Sun ²Xin Du ³Feng Guo ²Chang-Yu Lu⁴

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作者信息

1. School of Material Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China
2. School of Energy and Power,Jiangsu University of Science and Technology,Zhenjiang 212003,Jiangsu,China
3. College of Chemistry,Zhengzhou University,Zhengzhou 450001,China
4. School of Water Resource and Environment,Hebei Province Key Laboratory of Sustained Utilization and Development of Water Recourse,Hebei Center for Ecological and Environmental Geology Research,Hebei Geo University,Shijiazhuang 050031,China
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Abstract

Hydrogen acquisition from solar energy is an effective way to address energy crisis,which makes the development of efficient photocatalysts become the main direction of scientific research.Herein,cobalt phthalocya-nine/oxygen-doped g-C3N4(CoPc/OCN)S-scheme hetero-junction photocatalyst was designed by coupling multi-step calcination with solvothermal method for enhanced pho-tothermal-assisted photocatalytic H2 evolution.The multi-step calcined g-C3N4 is easier for O-doping formation,and the ethanol solvothermal strategy is utilized to enhance the dispersion of CoPc on OCN nanosheet surface and forms sufficient S-scheme heterojunction through H-bonds.In addition,the active sites and excellent photothermal properties of CoPc itself further improve the integrated photocatalytic activity of CoPc/OCN S-scheme hetero-junction.The optimal photocatalytic hydrogen evolution rate of CoPc/OCN S-scheme heterojunction photocatalyst reached 9.56 mmol·g-1·h-1,which is 2.69 and 1.23 times higher than that of CN and OCN,respectively.This work provides a valuable design idea and scheme for enhancing the multi-factor co-assisted photocatalytic H2 evolution performance.

Key words

Photothermal/Photocatalytic H2 evolution/Cobalt phthalocyanine/Oxygen-doped g-C3N4/S-scheme heterojunction

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基金项目

National Natural Science Foundation of China(21906072)

National Natural Science Foundation of China(21906039)

National Natural Science Foundation of China(21908115)

National Natural Science Foundation of China(22006057)

Hebei Province 333 Talents Project(A202101020)

Science and Technology Project of Hebei Education Department(BJ2021010)

Graduate Student Innovation Ability Training Funding Project of Hebei Province(CXZZSS2023129)

Open Fund for Hebei Province Key Laboratory of Sustained Utilization & Development of Water Recourse(HSZYL2022002)

Instrumental Analysis Center,Jiangsu University of Science and Technology()

出版年

2024

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDCSCDEI

影响因子：0.801

ISSN：1001-0521

参考文献量78

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