Preparation and photoelectrochemical properties of BiFeO3/BiOI composites. Issue 45 (16th July 2020)

• Record Type: Journal Article
• Authors: Lei, Yuxuan; Zhang, Yaping; Ding, Wenming; Yu, Lianqing; Zhou, Xinpeng; Lawrence Wu, Chi-Man
• Is Part Of: RSC advances. Volume 10:Issue 45(2020)
• Page Start: 26658
• Page End: 26663
• Publication Date: 2020-07-16
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d0ra02457k
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : We report the preparation, optical absorption and enhanced photoelectrochemical properties of novel BiOI-decorated BFO thin films heterostructures. Abstract : BiFeO3 thin films were spin coated onto FTO. BiFeO3 /BiOI composites have been successfully synthesized by an electrochemical deposition method. The morphology, structure and optical absorption properties of the as-synthesized samples were characterized via XRD, SEM, and UV-Vis DRS. The effect of the BiOI electrodeposition cycles on the photoelectrochemical properties of the BiFeO3 /BiOI composites were investigated. The results showed that the photoelectrochemical properties were enhanced under simulated solar light. The composite could achieve an optimum photocurrent density of 16.03 μA cm −2 at 0 V ( vs. Ag/AgCl), which is more than twice that of pure BiFeO3 thin films (6.3 μA cm −2 ). In addition, the Mott–Schottky curves indicate an improvement in the carrier density of the composite. The enhanced photoelectrochemical properties of the composites can be attributed to the formation of a heterojunction at the interface and the band bending of the ferroelectric material BiFeO3 .