Journal
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
Volume 343, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2023.123525
Keywords
Photocatalysis; U(VI) reduction; Benzyl alcohol; Selective oxidation
Ask authors/readers for more resources
In this study, an oxygen-deficient catalyst was developed for the simultaneous photoreduction of U(VI) and selective oxidation of benzyl alcohol to prepare benzaldehyde without the need for protective gases and sacrificial agents. The catalyst exhibited excellent performance in U(VI) removal and benzyl alcohol conversion, with high selectivity.
In the photoreduction of U(VI), protective gases and additional sacrificial agents are still the major obstacles. Herein, we developed an oxygen-deficient WOx/g-C3N4 catalyst for the simultaneous reduction of U(VI) and preparation of benzaldehyde by selective oxidation of benzyl alcohol without protective gases and sacrificial agents. The removal of U(VI) by WOx/g-C3N4 could reach 98.5% and the conversion of benzyl alcohol was nearly 32% with a selectivity close to 100%. Compared with single g-C3N4 and defect-free WO3, the photoreduction activity of WOx/g-C3N4 was 10.4 and 7 times higher, respectively. Besides, the role of oxygen and oxygen defects was explored. Owing to oxygen defects in the catalyst, oxygen was adsorbed on the oxidation end (WOx) of the catalyst and activated without entering the reduction end to interfere with the photoreduction of U(VI), while favoring the generation of center dot O2- to improve the selectivity of benzaldehyde. Finally, a new mechanism was proposed.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available