Boosting non-sacrificial H2O2 production on a Bi6S2O15 photocatalyst via creating a crystal surface-dependent internal electric field. Issue 2 (19th December 2022)

• Record Type: Journal Article
• Authors: Bian, Gaoming; Wang, Chen; Zhang, Yaning; Li, Junshan; Lou, Yang; Zhang, Ying; Dong, Yuming; Xu, Jing; Zhu, Yongfa; Pan, Chengsi
• Is Part Of: Journal of materials chemistry. Volume 11:Issue 2(2023)
• Page Start: 753
• Page End: 763
• Publication Date: 2022-12-19
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d2ta08722g
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A Bi6S2O15 photocatalyst without any cocatalyst loading is reported for the first time to exhibit considerable H2O2 production (3.4 mM h −1 g −1 ) from only H2O and O2 under a Xe lamp by creating a strong internal electric field (IEF) via exposing the (110) surface. Abstract : Photocatalytic H2 O2 production from H2 O and O2 is a green technology, but the available photocatalysts are limited, due to multi-step charge transfer-originated recombination. In this work, Bi6 S2 O15 (BSO) photocatalysts exposed with (110), (400), and (−130) surfaces, respectively, are newly studied to produce H2 O2 from only H2 O and O2 . The crystal surface-dependent internal electric field (IEF) is found to strongly inhibit the rapid charge recombination by generating high charge density at the surface and decreasing the electrostatic potential energy. In particular, BSO with the (110) surface exposed exhibits the highest H2 O2 production activity (3.4 mM h −1 g −1 ) under Xe lamp irradiation due to the strongest IEF. The effectiveness of IEF control on H2 O2 production gives guidelines for developing more efficient photocatalysts in the future.