Ferroelectric polarization and thin-layered structure synergistically promoting CO2 photoreduction of Bi2MoO6. Issue 18 (29th April 2020)

• Record Type: Journal Article
• Authors: Li, Shuguan; Bai, Liqi; Ji, Ning; Yu, Shixin; Lin, Sen; Tian, Na; Huang, Hongwei
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 18(2020)
• Page Start: 9268
• Page End: 9277
• Publication Date: 2020-04-29
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0ta02102d
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Ferroelectric field and thin-layered structure greatly accelerate charge transfer from the bulk to the surface and enrich catalytic sites, synergistically boosting CO2 photoreduction activity of Bi2 MoO6 . Abstract : Photocatalytic CO2 reduction for producing solar fuels is promising but severely restricted by the fast recombination of photogenerated electrons and holes and insufficient reactive sites of photocatalysts. Formation of an internal electric field is an effective route for facilitating charge separation, and two-dimensional structure construction is beneficial to increasing catalytic sites. Herein, ultrathin Bi2 MoO6 nanosheets with strong ferroelectricity were prepared by a combined CTAB-assisted hydrothermal and corona poling post-treatment process for synergistically improving the CO2 photoreduction activity. Without sacrificial agents and co-catalysts, the polarized Bi2 MoO6 ultrathin nanosheets demonstrate a remarkable CO2 reduction activity for CO production with a rate of 14.38 μmol g −1 h −1 in the gas–solid system, over 10 times enhancement than that of bulk Bi2 MoO6 . The combined strategies considerably promote the separation of photogenerated electrons and holes and enrich the reactive sites for CO2 adsorption, which co-boost the photocatalytic CO2 reduction performance of Bi2 MoO6 . In addition, a synergistically enhanced effect between corona poling and thin-layered structure was disclosed. This work provides corona poling as an efficient route for promoting charge separation of particulate photocatalysts, and offers new insights into synergistically improving the CO2 photoreduction activity.