A Initiative Intercalating Strategy for Conversion of Bi2O3 to Bi2O2[BO2(OH)] and Double Internal Electric Field‐Dependent Photoelectrochemistry Properties. Issue 14 (8th September 2016)

• Record Type: Journal Article
• Authors: Yu, Dongfang; Teng , Fei; Yang, Liquan; Pang, Lu; Xu, Qi; Zhang, Qiqi
• Is Part Of: ChemistrySelect. Volume 1:Issue 14(2016)
• Page Start: 4209
• Page End: 4217
• Publication Date: 2016-09-08
• Subjects: Anion intercalation -- Bi2O2[BO2(OH)] -- Double internal electric field; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201600681
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Herein, we, for the first time, have developed a facile anion intercalation method to prepare uniform Bi2 O2 [BO2 (OH)]/Bi2 O3 and Bi2 O2 [BO2 (OH)] nanosheets, in which H2 O2 is employed as the exfoliating reagent to break the weak Bi−O bonds (2.572 Å) between [Bi2 O2 ]n 2n+ layers, then allowing borate ion to precisely intercalate into [Bi2 O2 ]n 2n+ layers. Further, density functional theory (DFT) calculations reveal that both O 2p and B 2p of [BO3 ] 3− layer obviously contribute to an downshift of valence band (VB) and upshift of conduction band (CB), leading to a wider band gap of Bi2 O2 [BO2 (OH)]. Thus, Bi2 O2 [BO2 (OH)]/Bi2 O3 exhibit a higher photocatalytic activity than Bi2 O3 for the degradations of rhodamine B (RhB) under ultraviolet light irradiation (λ < 420 nm), which may be resultant from a synergetic effect of double internal electronic field that has improved charge separation efficiency. For featured layered materials, anion intercalation is an artful facile strategy to develop new, efficient photocatalysts. Abstract : A facile anion intercalation method has been reported to prepare uniform Bi2 O2 [BO2 (OH)]/Bi2 O3 and Bi2 O2 [BO2 (OH)] nanosheets, in which H2 O2 is employed as the exfoliating reagent to break the weak Bi−O bond (2.572 Å) between [Bi2 O2 ]n 2n+ layers, then allowing borate ion to precisely intercalate into [Bi2 O2 ]n 2n+ layers. For featured layered materials, the anion intercalation is an artful facile strategy to develop new, efficient photocatalysts.