Nanoscale Assembly of CdS/BiVO₄ Hybrids for Coupling Selective Fine Chemical Synthesis and Hydrogen Production under Visible Light.

ABSTRACT: Simultaneously utilizing photogenerated electrons and holes in one photocatalytic system to synthesize value-added chemicals and clean hydrogen (H₂) energy meets the development requirements of green chemistry. Herein, we report a binary material of CdS/BiVO₄ combining one-dimensional (1D) CdS nanorods (NRs) with two-dimensional (2D) BiVO₄ nanosheets (NSs) constructed through a facile electrostatic self-assembly procedure for the selectively photocatalytic oxidation of aromatic alcohols integrated with H₂ production, which exhibits significantly enhanced photocatalytic performance. Within 2 h, the conversion of aromatic alcohols over CdS/BiVO₄-25 was approximately 9-fold and 40-fold higher than that over pure CdS and BiVO₄, respectively. The remarkably improved photoactivity of CdS/BiVO₄ hybrids is mainly ascribed to the Z-scheme charge separation mechanism in the 1D/2D heterostructure derived from the interface contact between CdS and BiVO₄, which not only facilitates the separation and transfer of charge carriers, but also maintains the strong reducibility of photogenerated electrons and strong oxidizability of photogenerated holes. It is anticipated that this work will further stimulate interest in the rational design of 1D/2D Z-scheme heterostructure photocatalysts for the selective fine chemical synthesis integrated with H₂ evolution.

SUBMITTER: Shang FK 

PROVIDER: S-EPMC9718317 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature