In:
Sustainable Energy & Fuels, Royal Society of Chemistry (RSC), Vol. 6, No. 16 ( 2022), p. 3858-3871
Abstract:
Photocatalytic H 2 production and degradation of pollutants are promising strategies for energy conversion and environmental protection, where highly efficient photocatalysts are required. Herein, a novel type of Y, C, and O tridoped g-C 3 N 4 bifunctional photocatalyst was prepared via a simple one-step low-cost thermal polymerization technique, which exhibits a significant enhancement in photocatalytic redox efficiency under visible light for H 2 production and degradation of pollutants compared to bulk g-C 3 N 4 . The optimized Y0.1/C/O tridoped g-C 3 N 4 photocatalyst exhibits a remarkable H 2 evolution rate (HER = 2542.4 μmol g −1 h −1 ) which is 5 times higher than that of pristine g-C 3 N 4 with a high apparent quantum yield of 6% at 420 nm, besides excellent degradation efficiencies for organic pollutants (∼100, 98.5 and 82.4% for mixed dyes, congo red, and methylene blue, respectively). The influence of Y 3+ concentration on the photocatalytic performance and electronic structure of Y/C/O–CN was also investigated. The major reactive species involved in the photodegradation process were found to be superoxide (O 2 ˙ − ) radicals. Moreover, the experimental and computational results suggest that the enhanced photocatalytic performance is due to the synergistic effect of Y, C, and O tridoping, which can adjust the band structure of g-C 3 N 4 , reduce the bandgap, improve visible-light absorption, and accelerate charge separation. This study paves the way to fabricate extremely effective tridoped photocatalysts for efficiently evolving hydrogen under visible light and resolving future environmental pollution.
Type of Medium:
Online Resource
ISSN:
2398-4902
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2882651-6
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