CuS nanosheet-induced local hot spots on g-C3N4 boost photocatalytic hydrogen evolution

被引：21

作者：

Xue, Fei ^{[1
,2
,3
]}

Wu, Haochen ^{[1
,2
]}

Liu, Yuting ^{[1
,2
]}

Min, Moya ^{[1
,2
]}

Hatami, Mohammad ^{[4
]}

Li, Naixu ^{[5
]}

Liu, Maochang ^{[1
,2
,6
]}

机构：

[1] Xi An Jiao Tong Univ, Int Res Ctr Renewable Energy, Xian 710049, Shaanxi, Peoples R China

[2] Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Shaanxi, Peoples R China

[3] Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Fujian, Peoples R China

[4] Ferdowsi Univ Mashhad, Mech Engn Dept, POB 91775-111, Mashhad, Iran

[5] Southeast Univ, Sch Chem & Chem Engn, Nanjing 211189, Jiangsu, Peoples R China

[6] Xi An Jiao Tong Univ, Suzhou Acad, Suzhou 215123, Jiangsu, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2023年 / 48卷 / 16期

基金：

中国国家自然科学基金;

关键词：

Photothermal effect; Photochemical effect; Photocatalytic hydrogen evolution; CuS nanosheet; HETEROJUNCTION; EFFICIENT; TEMPERATURE; PERFORMANCE; SHELL;

D O I：

10.1016/j.ijhydene.2022.05.087

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An ideal model composite made of CuS nanosheet (photothermal material) and g-C3N4 was constructed through in-situ assembly procedure, along with integration of dual photo-chemical effect and photothermal effect. Consequently, optimized CN/CuS composite approaches remarkable photocatalytic performance improved by 44.5 times with regarding to that of pristine CN. This superiority can be assignable to inherent characteristic of CuS as photochemical component, with improved charge separation and enriched surface active-sites. Additionally, the critical contribution of photothermal effect in boosting water photosplitting was also experimentally validated. CuS nanosheet as hot spots enables rapid temperature increment around photocatalysts under visible/near-infrared (NIR) light irradiation. The heat converted from solar is conducive to increase carrier density, accel-erate carrier mobility, alleviate onset potential and facilitate surface redox kinetics, so as to promote photocatalytic activity. It is believed that synergetic incorporation of photo-thermal and photochemical conversion could be expanded to other photocatalytic systems towards effective solar energy conversion.& COPY; 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：6346 / 6357

页数：12

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