Multi-Prismatic Hollow Cube CeVO4 with Adjustable Wall Thickness Directed towards Photocatalytic CO2 Reduction to CO

Abstract

Ternary orthovanadate compounds have received increasing attention due to their broad light absorption and diverse crystal structure. However, their multi-assembled crystal morphologies are limited mainly due to their initially polyatomic VO4 groups. In this study, multi-prismatic hollow cubic CeVO4 microstructures were fabricated by a one-step solvothermal method without any organic agents. The increase in wall thickness is in accordance with the radial direction of the quadrangular prism. Moreover, the overdose of the V precursor is favorable for the formation of hollow micro-cubic CeVO4, and the wall thickness changes from 200 to 700 nm. Furthermore, these CeVO4 microstructures were applied to photocatalytic CO2 reduction with a maximum CO generation rate of up to 78.12 μmol g−1 h−1 under visible light irradiation, which was several times higher than that of the other samples. This superior photocatalytic activity might be attributed to its good crystallinity and unique exposed interior structure. This study provides guidelines for the multi-assembled structure fabrication of ternary compounds and expands upon the exploration of the spatial structure of multivariate compounds.

Biomedical applications of cerium vanadate nanoparticles: a review

“…Additionally, the study extends the investigation of spatial structures in multivariate compounds and provides a direction for producing multiassembled ternary compound structures. 123 According to the reviewed research, summarized in Table 3, the unique physicochemical characteristics of CeVO 4 NPs have shown tremendous promise in photocatalytic applications. The strong photocatalytic activity of CeVO 4 NPs results from their unique band gap, crystal structure, and surface characteristics, which may change by altering the synthesis settings.…”

“…Additionally, the study extends the investigation of spatial structures in multivariate compounds and provides a direction for producing multi-assembled ternary compound structures. 123…”