Rocksalt-Zincblende-Wurtzite Mixed-Phase ZnO Crystals With High Activity as Photocatalysts for Visible-Light-Driven Water Splitting.
ZnO photocatalysts
impurity levels
mixed-phase
overall water splitting
visible light absorption
Journal
Frontiers in chemistry
ISSN: 2296-2646
Titre abrégé: Front Chem
Pays: Switzerland
ID NLM: 101627988
Informations de publication
Date de publication:
2020
2020
Historique:
received:
21
02
2020
accepted:
03
04
2020
entrez:
16
5
2020
pubmed:
16
5
2020
medline:
16
5
2020
Statut:
epublish
Résumé
Finding out the factors that dominate photocatalytic activity is always an essential topic toward the development of highly active photocatalysts. The increased photoactivity of ZnO:Ga (L) may be attributed to the existence of homojunctions and resultant oxygen vacancies in triphasic ZnO:Ga (L), which can reduce the recombination of photogenerated carriers and provide them higher doping efficiency and higher optical gain. Then, the photocatalytic behaviors of as-prepared N doped crystals have been studied and rationalized to understand the role of each of species played in light absorption and photo activation. The N-doped ZnO:Ga (L) sample which showed higher activity than N-doped ZnO:Ga (B) and ZnO:Ga (L), the high activity could be explained by increase of visible light absorption and presence of empty impurity levels introduced by N doping.
Identifiants
pubmed: 32411673
doi: 10.3389/fchem.2020.00351
pmc: PMC7201987
doi:
Types de publication
Journal Article
Langues
eng
Pagination
351Informations de copyright
Copyright © 2020 Li, Cai, Li, Liu and Huang.
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