Fabrication of γ-In2Se3/α-In2Se3/rGO homo-heterojunction for efficient photocatalytic hydrogen evolution. (27th November 2020)

• Record Type: Journal Article
• Authors: Zhang, Qiqi; Wang, Ruimiao; Xie, Xiang; Tang, Chunni; Hu, Xiaoyun; Fan, Jun; Liu, Enzhou
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 58(2020)
• Page Start: 33370
• Page End: 33380
• Publication Date: 2020-11-27
• Subjects: In2Se3 -- Reduced graphene oxide -- Homo-heterojunction -- Photocatalytic hydrogen evolution; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.09.029
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: In this work, unique γ-In2 Se3 nanoparticles/α-In2 Se3 nanosheets (In2 Se3 NPS) homojunction was prepared to facilitate the transfer and separation of internal carriers, and then reduced graphene oxide (rGO) was introduced to enhance the photocatalytic activity of In2 Se3 NPS by in-situ solvothermal method. The obtained In2 Se3 NPS/rGO homo-heterojunctions exhibited 3.25 times higher H2 evolution rate (4497.24 μmol g −1 h −1 ) and good stability compared with pristine In2 Se3 NPS, which was ascribed to efficient separation and migration of photogenerated electron-hole pairs, abundant active sites and reduced overpotential of H2 evolution over the above homo-heterojunction structure with strong interaction between rGO and In2 Se3 NPS. This work provides a promising approach and new insight to fabricate homo-heterojunction photocatalyst with an excellent electronic structure toward photocatalytic water splitting. Highlights: γ-In2 Se3 /α-In2 Se3 /rGO homo-heterojunctions was synthesized by solvothermal strategy. Steady interaction in homo-heterojunctions facilitates carriers separation. Low recombination rate of electron-hole pairs is obtained by homo-heterojunctions. Reduced overpotential and abundant active sites improve H2 evolution activity.