Back to Search
Start Over
ZnO-based heterostructures as photocatalysts for hydrogen generation and depollution: a review.
- Source :
- Environmental Chemistry Letters; Apr2022, Vol. 20 Issue 2, p1047-1081, 35p
- Publication Year :
- 2022
-
Abstract
- Energy shortage and escalating pollution are major challenges globally. Heterogeneous photocatalysis is one of the most cost-effective methods for producing renewable energy and removing pollutants. In particular, ZnO nanostructures are promising photocatalysts that are economic, stable, and biologically safe. ZnO-based nanoheterostructures have been used for heavy metal reduction, organic pollutants degradation, photocatalytic hydrogen production, and drug mineralization. Here, we review ZnO-based nanoheterojunctions as photocatalysts for hydrogen production and pollutant degradation. Hydrogen production has reached 1200 mol g<superscript>−1</superscript> h<superscript>−1</superscript> using Ce-doped ZnO/ZnS heterojunction, with a 8.5-fold higher efficiency than bare ZnO. Nearly complete removal of a dye pollutant was achieved in 15 min using hybrid ethyl cellulose-modified g-C<subscript>3</subscript>N<subscript>4</subscript>/ZnO. Moreover, ZnO/Ag<subscript>2</subscript>WO<subscript>4</subscript>/Fe<subscript>3</subscript>O<subscript>4</subscript> showed a 152% and 143% higher antibiotic degradation rate than bare Ag<subscript>2</subscript>WO<subscript>4</subscript> and ZnO, respectively. We present methods to modify ZnO, including coupling with other semiconductors, metal/non-metal doping, and carbon-based materials coupling; and methods for charge divergence in binary and ternary ZnO-based nanocomposites. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 16103653
- Volume :
- 20
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Environmental Chemistry Letters
- Publication Type :
- Academic Journal
- Accession number :
- 156025415
- Full Text :
- https://doi.org/10.1007/s10311-021-01361-1