Facile Synthesis of Nano-Flower β-Bi2O3/TiO2 Heterojunction as Photocatalyst for Degradation RhB

Molecules. 2023 Jan 16;28(2):882. doi: 10.3390/molecules28020882.

Abstract

Photocatalysis is a hopeful technology to solve various environmental problems, but it is still a technical task to produce large-scale photocatalysts in a simple and sustainable way. Here, nano-flower β-Bi2O3/TiO2 composites were prepared via a facile solvothermal method, and the photocatalytic performances of β-Bi2O3/TiO2 composites with different Bi/Ti molar ratios were studied. The nano-flower Bi2O3/TiO2 composites were studied by SEM, XRD, XPS, BET, and PL. The PL result proved that the construction of staggered heterojunction enhanced the separation efficiency of carriers. The degradation RhB was applied to study the photocatalytic performances of prepared materials. The results showed that the degradation efficiency of RhB increased from 61.2% to 99.6% when the molar ratio of Bi/Ti was 2.1%. It is a mesoporous approach to enhance photocatalytic properties by forming heterojunction in Bi2O3/TiO2 composites, which increases the separation efficiency of the generated carriers and improves photocatalytic properties. The photoactivity of the Bi2O3/TiO2 has no evident changes after the fifth recovery, indicating that the Bi2O3/TiO2 composite has distinguished stability.

Keywords: Bi2O3/TiO2; degradation RhB; heterojunction; photocatalysts.

MeSH terms

  • Bismuth*
  • Catalysis
  • Titanium*

Substances

  • titanium dioxide
  • Bismuth
  • Titanium

Grants and funding

This work was financially supported by the Science and Technology Department of Jiangxi Province (20181ACG70025) and the Key Project of Science and Technology Research of Jiangxi Provincial Department of Education (No. GJJ191044). This work was also supported by Shanghai Summit Discipline in Design (SJGFXK-2019-001), Jiangxi Province “double thousand plan” project (jxsq2019201007), and Jiangxi Province’s Scientific Planning Project (No. YG2021057).