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Solar Fuel Generation by 2D Self-Assembled g-C3N4/BiVO4 Z-Scheme.

Authors :
LaChance, Robert
Adeli, Babak
Taghipour, Fariborz
Source :
Solar RRL; Jan2024, Vol. 8 Issue 2, p1-12, 12p
Publication Year :
2024

Abstract

Graphitic carbon nitride (g-CN) is a promising photocatalyst for solar fuel generation due to its medium band gap and facile synthesis from earth-abundant materials. However, low charge carrier mobility and high charge recombination have hampered the observed rate of H<subscript>2</subscript> evolution and CO<subscript>2</subscript> reduction. Herein, an electrostatically self-assembled 2D Z-scheme heterojunction between g-CN and bismuth vanadate (BiVO4) is investigated with and without reduced graphene oxide (rGO) acting as an electron transfer mediator to speed charge carrier mobility and hamper charge recombination. Protonation of the g-CN surface allow for self-assembly between 2D sheets of g-CN, rGO, and BiVO<subscript>4</subscript>. The mass ratio between g-CN and BiVO<subscript>4</subscript> is incrementally adjusted to optimize synergistic charge transportation effects versus shadowing effects of multicomponent photocatalysts. Further, a selectivity effect is observed across mass ratios of photocatalyst constituents, allowing tuning of photocatalyst yield. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
2367198X
Volume :
8
Issue :
2
Database :
Complementary Index
Journal :
Solar RRL
Publication Type :
Academic Journal
Accession number :
175776373
Full Text :
https://doi.org/10.1002/solr.202300677