Options
Alkaline induced indium gradient distribution in Znm In2 S3+m/In(OH)3 heterojunction for improved photocatalytic H2 generation
Publikationstyp
Journal Article
Publikationsdatum
2020-11-15
Sprache
English
TORE-URI
Enthalten in
Volume
530
Article Number
147241
Citation
Applied Surface Science (530): 147241 (2020-11-15)
Publisher DOI
Scopus ID
Building a heterojunction composite which contains two or more semiconductors with matching energy band structures is an effective way to boost the photocatalytic performance. In this paper, a perfectly matching heterojunction constructed by semiconductors with a continuously changing energy band structure was demonstrated. It was found that migration of indium in layered ZnIn2S4 could be driven from the bulk to the surface under alkaline condition. Based on this, In(OH)3 was in situ grown on the surface of ZnIn2S4, and meanwhile, ZnIn2S4 was converted to ZnmIn2S3+m with m continuously variable. Due to the concentration gradient of indium, the conduction band (CB) of ZnmIn2S3+m/In(OH)3, which was formed by In5s5p orbitals mixed with Zn4s4p orbitals, displays a continuous change that can efficiently promote photogenerated charge separation and transfer.
Schlagworte
Heterojunction
In(OH) 3
Photocatalytic H production 2
ZnIn S 2 4