https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46850 2 photoreduction into solar fuels is promising for generating renewable energy. Herein, SrBi₂Nb₂O₉ nanosheets are prepared as high-performance photocatalysts for CO₂ reduction, highlighting superiority of ferroelectric polarization and anisotropic charge migration. Ferroelectric polarization within SrBi₂Nb₂O₉ nanosheets provides an in-built electric field, which greatly facilitates the bulk charge separation. Also, the photogenerated electrons and holes migrate separately to the NbO₆ octahedral layers and within the ab-plane in the Bi₂O₂ layers, achieving efficient anisotropic charge migration. Without co-catalyst or sacrificial agent, SrBi₂Nb₂O₉ nanosheets show outstanding CO₂ reduction activity in producing CH₄. The ferroelectric polarization is further enhanced by electric poling and annealing post-treatments. The electrically poled SrBi₂Nb₂O₉ shows a high CH₄ evolution rate of 25.91 μmol g⁻¹ h⁻¹ with an AQE of 1.96 % at 365 nm, exceeding most of state-of-the-art photocatalysts reported to date. This work paves an avenue for development of highly efficient photocatalysts and beyond by tuning the ferroelectricity and electronic structure.]]> Mon 29 Jan 2024 18:48:21 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:36540 Mon 01 Jun 2020 12:07:38 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:44274 2Bi₂Nb₂TiO₁₂ nanosheets, which were prepared by a mineralizer‐assisted soft‐chemical method. Introduction of OVs on the surface of Sr₂Bi₂Nb₂TiO₁₂ extends photoresponse to cover the whole visible region and also tremendously promotes separation of photoinduced charge carriers. Adsorption and activation of CO₂ molecules on the surface of the catalyst are greatly enhanced. In the gas‐solid reaction system without co‐catalysts or sacrificial agents, OVs‐abundant Sr₂Bi₂Nb₂TiO₁₂ nanosheets show outstanding CO₂ photoreduction activity, producing CO with a rate of 17.11 μmol g⁻¹ h⁻¹, about 58 times higher than that of the bulk counterpart, surpassing most previously reported state‐of‐the‐art photocatalysts. Our study provides a three‐in‐one integrated solution to advance the performance of photocatalysts for solar‐energy conversion and generation of renewable energy.]]> Fri 23 Jun 2023 09:56:26 AEST ]]>