Construction of 2D BiVO<sub>4</sub>−CdS−Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> Heterostructures for Enhanced Photo‐redox Activities
Wuyou Wang, Zachary D. Hood, Xuanyu Zhang, Ilia N. Ivanov, Zhenghong Bao, Tongming Su, Mingzhou Jin, Lei Bai, Xuewen Wang, Rongbin Zhang, Zili Wu
Abstract
Abstract Photocatalytic evolution of hydrogen and oxygen from water splitting over semiconductors is an efficient method for solar energy conversion. In this study, the 2D/2D BiVO 4 −CdS heterostructures with Ti 3 C 2 T x (T x =O, OH, F) as a co‐catalyst were synthesized by two steps as the visible‐light‐driven photocatalysts. Compared with BiVO 4 and CdS, the heterostructured catalysis exhibit greatly enhanced photocatalytic hydrogen and oxygen production performances and excellent photodegradation and photoreduction activities of methylene blue (MB) and potassium dichromate Cr(VI), respectively. The remarkable enhancement is attributed to the proposed Z‐scheme carrier transfer derived from the 2D/2D BiVO 4 −CdS heterostructures. Charge separation and transfer of photoexcited electrons and holes pairs are further enhanced after loading Ti 3 C 2 T x in the BiVO 4 −CdS heterostructures. The potential Z‐scheme photocatalytic system and co‐catalyst endows the BiVO 4 −CdS−Ti 3 C 2 T x heterostructures with strong photo‐redox capacity and excellent stability in solar energy conversion.