首页|Built-in electric field intensified by photothermoelectric effect drives charge separation over Z-scheme 3D/2D In2Se3/PCN heterojunction for high-efficiency photocatalytic CO2 reduction

Built-in electric field intensified by photothermoelectric effect drives charge separation over Z-scheme 3D/2D In2Se3/PCN heterojunction for high-efficiency photocatalytic CO2 reduction

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It is a challenging issue to further drive charge separation through the oriented design of Z-scheme het-erojunction in the exploitation of cost-effective photocatalytic materials.In this contribution,the unique Z-scheme 3D/2D In2Se3/PCN heterojunction is developed through implanting In2Se3 microspheres on PCN nanosheets using an in situ growth technique,which acquires the effective CO generation activity from photocatalytic CO2 reduction(CO2R).The CO yield of 4 h in the CO2R reaction over the optimal In2Se3/PCN-15 sample reaches up to 11.40 and 2.41 times higher than that of individual PCN and In2Se3,respectively.Such greatly enhanced photocatalytic performance is primarily the improvement of photo-generated carrier separation efficiency.To be more specific,the formed built-in electric field is signifi-cantly intensified by producing the temperature difference potential between In2Se3 and PCN owing to the photothermoelectric effect of ln2Se3,which actuates the high-efficiency separation of photogenerated charge carriers along the Z-scheme transfer path in the ln2Se3/PCN heterojunction.The effective strat-egy of enhancing the built-in electric field to drive photogenerated charge separation proposed in this work opens up an innovative avenue to design Z-scheme heterojunction applied to high-efficiency pho-tocatalytic reactions,such as hydrogen generation from water splitting,CO2R,and degradation of organic pollutants.

In2Se3/PCNZ-scheme heterojunctionPhotocatalytic CO2 reductionEnhanced built-in electric fieldPhotothermoelectric effect

Hongjun Dong、Lei Tong、Pingfan Zhang、Daqiang Zhu、Jizhou Jiang、Chunmei Li

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Institute of Green Chemistry and Chemical Technology,School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang 212013,China

School of Environmental Ecology and Biological Engineering,Key Laboratory of Green Chemical Engineering Process of Ministry of Education,Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education,Novel Catalytic Materials of Hubei Engineering Research Center,Wuhan Institute of Technology,Wuhan 430205,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaKey R&D Program of Hubei ProvincePostdoctoral Science Foundation of ChinaGraduate Research Innovation Program of Jiangsu ProvincialGraduate Research Innovation Program of Jiangsu ProvincialZhenjiang Key R&D Programmes

52072153620041432022BAA0842021M690023KYCX22_3694KYCX23_3649SH2021021

2024

10.1016/j.jmst.2023.10.012

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.179(12)
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