Oxygen Vacancies Enriched Hollow Bi₂MoO₆ Microspheres for Efficient Photocatalytic Oxidation of Hydrocarbons

Abstract

Photocatalytic aerobic oxidation of hydrocarbons to ketones is an attractive route for synthesizing high-value-added chemicals. However, the main challenge of photocatalytic oxidation reactions is their low activity. Herein, hollow Bi 2 MoO 6 microspheres were synthesized by a facile two-step synthesis route combining ethylene glycol solvothermal with postannealing treatment. In the photocatalytic aerobic oxidation of ethylbenzene to the corresponding ketones under visible light irradiation using O 2 as an oxidant, the hollow Bi 2 MoO 6 microspheres exhibit a record acetophenone production rate of 1.1 mmol g −1 h −1 with 90% selectivity. The photoactivity of oxygen vacancy-enriched Bi 2 MoO 6 is 61 times higher than that of uncalcined Bi 2 MoO 6 , which can be attributed to the effective separation of photogenerated carriers and the abundant catalytic active sites (i.e., oxygen vacancies) on hollow Bi 2 MoO 6 microspheres. This work provides more insights into understanding how to construct highly efficient and active visible-light-responsive photocatalysts for the aerobic oxidation of organic compounds.

Stable and Flexible Polyurethane Membranes with WO3/Bi2MoO6 Nanoparticles for the Photocatalytic Degradation of 2,4-Dichlorophenol

“…As shown in Figure d, four subpeaks are seen in the high-resolution XPS spectrum of O 1s. The peak with a binding energy of 531.64 eV is attributed to oxygen molecules adsorbed on the surface (O–H) Figure e shows the high-resolution XPS spectrum of C 1s, and three characteristic peaks of 284.82, 286.34, and 287.58 eV were observed, corresponding to C–C, C–N, and C–O bonds, respectively .…”