Inducing photocarrier separation via 3D porous faveolate cross-linked carbon to enhance photothermal/pyroelectric property

Meng Li; Jingxue Sun; Gang Chen; Shuang Wang; Shunyu Yao

Advanced Powder Materials (Jul 2022)

Inducing photocarrier separation via 3D porous faveolate cross-linked carbon to enhance photothermal/pyroelectric property

Meng Li,
Jingxue Sun,
Gang Chen,
Shuang Wang,
Shunyu Yao

Affiliations

Meng Li: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
Jingxue Sun: Corresponding author.; MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
Gang Chen: Corresponding author.; MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
Shuang Wang: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
Shunyu Yao: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China

Journal volume & issue: Vol. 1, no. 3
p. 100032

Abstract

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The CdS/Bi2S3 supported three-dimensional (3D) porous faveolate carbon structure (CdS/Bi2S3@C) composite photocatalyst was constructed. Bi2S3 nanoparticles are regarded as photothermal agents and pyroelectric materials to absorb near infrared light (NIR) and convert it into heat. 3D porous faveolate of carbon acts as incubator to reduce heat loss and optimize photothermal effects. There is a greater fluctuating temperature difference (ΔΤ) between photothermal effect of Bi2S3 and cold photocatalytic system. This enhances the pyroelectric effect that Bi2S3 undergoes spontaneous polarization and releases the surface charge. Therefore, the separation of electrons and holes in the CdS photocatalyst can be induced. The COMSOL simulation results show that, the higher pyroelectric potential producted by larger ΔΤ is more favorable to the photocatalytic process. The hydrogen evolution rate of CdS/Bi2S3@C photocatalyst can reach 5.88 mmol·g−1·h−1 with excellent cycle stability.

Published in Advanced Powder Materials

ISSN: 2772-834X (Online)
Publisher: KeAi Communications Co. Ltd.
Country of publisher: China
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.keaipublishing.com/en/journals/advanced-powder-materials/

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