All-solid-state Z-scheme system of RGO-Cu2O/Fe2O3 for simultaneous hydrogen production and tetracycline degradation. (September 2017)

• Record Type: Journal Article
• Authors: Shen, Hongqiang; Liu, Guiwu; Yan, Xu; Jiang, Jinhui; Hong, Yuanzhi; Yan, Ming; Mao, Baodong; Li, Di; Fan, Weiqiang; Shi, Weidong
• Is Part Of: Materials today energy. Volume 5(2017)
• Page Start: 312
• Page End: 319
• Publication Date: 2017-09
• Subjects: Graphene -- Z-Scheme -- Hydrogen production -- Visible light -- Tetracycline; Energy development -- Periodicals; Energy industries -- Periodicals; Power resources -- Periodicals; Energy policy -- Periodicals; Energy development; Energy industries; Energy policy; Power resources; Electronic journals; Periodicals; 621.042
• DOI: 10.1016/j.mtener.2017.07.008
• Languages: English
• ISSNs: 2468-6069

Abstract

Abstract: The Cu2 O and Fe2 O3 semiconductors were employed to construct a series of composite photocatalysts by one-step solvothermal synthesis. The reduced graphene oxide (RGO) was used as a solid-state medium to efficiently transport photogenerated electrons from the conduction band of Fe2 O3 to valence band of Cu2 O, which played a key role in the introduction of tetracycline (TC) degradation during H2 production. The RGO-Cu2 O/Fe2 O3 composites exhibited the more excellent photocatalytic performance than the single Cu2 O or Fe2 O3 on the H2 production and TC degradation. Moreover, it is the first time that TC was used as a scavenger to consume the holes during H2 production, resulting in a higher H2 production efficiency than that using methanol (equal mass). The H2 production from TC solution with the G50-7/3 composite was about eight times higher than that in pure water and five times higher than that from methanol solution. This work successfully concentrated H2 production and TC degradation in a system and TC in wastewater showed a huge development potential in the field of sacrificial agents for H2 production. Graphical abstract: Cu2 O and Fe2 O3 were used to construct a Z-scheme photocatalytic system with RGO. RGO was used to transport electrons efficiently from the CB of Fe2 O3 to VB of Cu2 O and played a key role in the introduction of TC degradation during H2 production. This work successfully concentrated H2 production and TC degradation in a system Highlights: RGO-Cu2 O/Fe2 O3 composites were prepared by one-step solvothermal synthesis. RGO-Cu2 O/Fe2 O3 exhibited the better photocatalytic performance than RGO-Cu2 O or RGO-Fe2 O3 . It is the first time that TC was used as the scavenger to consume the holes during H2 production. H2 production and tetracycline degradation were successfully concentrated in a system.