Enhanced visible-light photocatalytic hydrogen evolution activity of Er3+:Y3Al5O12/PdS–ZnS by conduction band co-catalysts (MoO2, MoS2 and MoSe2). (10th August 2016)

• Record Type: Journal Article
• Authors: Song, Yahui; Wei, Shengnan; Rong, Yang; Lu, Chunxiao; Chen, Yang; Wang, Jun; Zhang, Zhaohong
• Is Part Of: International journal of hydrogen energy. Volume 41:Number 30(2016)
• Page Start: 12826
• Page End: 12835
• Publication Date: 2016-08-10
• Subjects: Conduction band co-catalyst -- Valence band co-catalyst -- Visible-light photocatalytic hydrogen evolution -- Up-conversion luminescence agent; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2016.06.065
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Several conduction band co-catalysts (CBCOs), MoO2, MoS2 and MoSe2, were prepared to improve the visible-light photocatalytic hydrogen evolution activity of Er 3+ :Y3 Al5 O12 /PdS–ZnS from water splitting, in which the PdS is a valence band co-catalyst (VBCO) used to facilitate the photo-generated hole transfer and the Er 3+ :Y3 Al5 O12 is an up-conversion luminescence agent from visible light to ultraviolet light used to provide the ultraviolet light satisfying the energy demands of wide band-gap ZnS photocatalyst. XRD, SEM, TEM and EDX analyses were employed to confirm the morphology, microstructure and composition of the prepared photocatalysts. UV–vis absorption and PL spectra were also determined to explore luminescence effect of the Er 3+ :Y3 Al5 O12 . The visible-light photocatalytic hydrogen evolution activity of the prepared photocatalysts was evaluated by using Na2 S and Na2 SO3 as sacrificial reagents in aqueous solution under visible light irradiation. The influential factors such as contents of CBCOs (MoO2, MoS2 and MoSe2 ) and visible-light irradiation time on visible-light photocatalytic hydrogen evolution of Er 3+ :Y3 Al5 O12 /PdS–ZnS–MoX2 (X = O, S and Se) were investigated in detail. Particularly, Er 3+ :Y3 Al5 O12 /PdS–ZnS–MoSe2 with 0.30 wt% MoSe2 shows the highest photocatalytic hydrogen evolution activity. Graphical abstract: Several conduction band co-catalysts (CBCOs), MoO2, MoS2 and MoSe2, were prepared to improve the visible-light photocatalytic hydrogen evolution activity of Er 3+ :Y3 Al5 O12 /PdS-ZnS from water splitting. The visible-light photocatalytic hydrogen evolution activity of the prepared photocatalysts was evaluated by using Na2 S and Na2 SO3 as sacrificial reagents in an aqueous solution under visible light irradiation. Er 3+ :Y3 Al5 O12 /PdS-ZnS-MoSe2 with 0.30 wt% MoSe2 shows the highest visible-light photocatalytic hydrogen evolution activity. Highlights: ZnS was modificated with PdS and MoSe2 to enhance photocatalytic activity. Er:YAG provides UV light to satisfy demands of ZnS for effective H2 evolution. Er:YAG/PdS–ZnS–MoSe2 shows high visible-light photocatalytic H2 evolution activity.