Hollow core–shell Co9S8@In2S3 nanotube heterojunctions toward optimized photothermal–photocatalytic performance. Issue 22 (12th October 2021)

• Record Type: Journal Article
• Authors: Wang, Ke; Zhang, Zhen; Cheng, Tianzhi; Xing, Zipeng; Li, Zhenzi; Zhou, Wei
• Is Part Of: Catalysis science & technology. Volume 11:Issue 22(2021)
• Page Start: 7412
• Page End: 7419
• Publication Date: 2021-10-12
• Subjects: Catalysis -- Periodicals; 541.395
• DOI: 10.1039/d1cy01637g
• Languages: English
• ISSNs: 2044-4753

Abstract

Abstract : Hollow core–shell Co9 S8 @In2 S3 photocatalysts show excellent photothermal–photocatalytic hydrogen evolution, which is attributed to unique hollow structure, the successfully constructed heterojunction and core–shell nanostructure. Abstract : Reasonable design of advanced semiconductor photocatalyst structures is an effective strategy for solar-to-chemical energy conversion. Herein, hollow core–shell Co9 S8 @In2 S3 nanotube heterojunctions are designed through two-step hydrothermal and solvothermal strategies. The construction of the heterojunction between Co9 S8 and In2 S3 enhances the separation efficiency of electron–hole pairs, and the hollow structure of Co9 S8 @In2 S3 improves the scattering and refraction efficiency of incident light and the core–shell structure increases the contact area and provides adequate surface-active sites. In addition, the broad-spectrum absorption enables Co9 S8 @In2 S3 to possess a satisfactory photothermal conversion ability, which can promote the photocatalytic hydrogen production obviously by increasing the system temperature. The maximum photocatalytic H2 productivity achieved on the 20%Co9 S8 @In2 S3 heterojunction is up to 4072.0 μmol g −1 h −1 without any noble metal as co-catalysts, which is 11.7 times higher than that of pristine In2 S3 due to the efficient fabrication of the hollow core–shell heterojunction.