• 文献标题:   Efficient Visible-Light Photocatalytic Cycloaddition of CO2 and Propylene Oxide Using Reduced Graphene Oxide Supported BiNbO4
  • 文献类型:   Article
  • 作  者:   BAKIRO M, AHMED SH, ALZAMLY A
  • 作者关键词:   band gap, binbo4/rgo composite, visible light, red shift, photocatalyst, co2 cycloaddition
  • 出版物名称:   ACS SUSTAINABLE CHEMISTRY ENGINEERING
  • ISSN:   2168-0485
  • 通讯作者地址:   UAE Univ
  • 被引频次:   0
  • DOI:   10.1021/acssuschemeng.0c03363
  • 出版年:   2020

▎ 摘  要

In this study, a series of novel BiNbO4 and BiNbO4/reduced graphene oxide (BiNbO4/r-GO) visible-light photocatalysts were prepared. Pure BiNbO4 was prepared by simple co-precipitation; on the other hand, BiNbO4/r-GO composites were prepared by simple mechanical mixing, followed by hydrothermal treatment. The effect of r-GO on the structural, surface morphological, and optical properties of the prepared photocatalysts was investigated using ultraviolet-visible (UV-vis) diffuse reflectance spectroscopy (UV-vis DRS), powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) for the determination of the specific surface area and porosity and energy-dispersive X-ray spectroscopy (EDX) for determining the elemental composition. A red shift in optical band gap measurements was observed with the increasing r-GO mass percentage in the prepared BiNbO4/r-GO composites. Photocatalytic activities of pure BiNbO(4 )and the composites were evaluated using the photocatalytic cycloaddition of carbon dioxide to propylene oxide as a model reaction. All the prepared photocatalysts produced cyclic propylene carbonate selectively with no polymeric material observed. The highest photocatalytic efficiency was achieved using BiNbO4/5% r-GO composite photocatalyst, where the mass percentage of r-GO was 5%.