Novel I-BiOBr/BiPO4 heterostructure: synergetic effects of I− ion doping and the electron trapping role of wide-band-gap BiPO4 nanorods. Issue 61 (10th June 2016)

• Record Type: Journal Article
• Authors: Jia, Xuemei; Cao, Jing; Lin, Haili; Zhang, Meiyu; Guo, Xiaomin; Chen, Shifu
• Is Part Of: RSC advances. Volume 6:Issue 61(2016)
• Page Start: 55755
• Page End: 55763
• Publication Date: 2016-06-10
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra06330f
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Outstanding activity of I-BiOBr/BiPO4 was displayed due to the synergetic effects of doped I − ions in I-BiOBr and I-BiOBr/BiPO4 interface. Abstract : A novel I − -doped BiOBr/BiPO4 (I-BiOBr/BiPO4 ) heterostructure was constructed by a facile deposition-precipitation method using wide-band-gap BiPO4 nanorods as the substrate. The as-prepared I-BiOBr/BiPO4 composite exhibited a notably enhanced photocatalytic performance in the decomposing of methyl orange and phenol under visible light ( λ > 420 nm) irradiation in comparison with BiOBr, I-BiOBr, BiPO4 and BiOBr/BiPO4 reference samples. The photocatalytic activity improvement of I-BiOBr/BiPO4 mainly resulted from the synergetic effects of doped I − ions in I-BiOBr and the heterojunction interface between I-BiOBr and BiPO4 . I − ions doping narrowed the band-gap energy of BiOBr to generate more photocharges under visible light irradiation. Moreover, BiPO4 quickly trapped and transferred the electrons originating from I-BiOBr. This study affords a facile strategy to intensively improve the visible light photocatalytic activity of the BiOX system for water contaminants removal.