화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.110, 168-177, June, 2022
DOI10.1016/j.jiec.2022.02.051  Export Citation
Hierarchical Sr-Bi2WO6 photocatalyst for the degradation of 4-nitrophenol and methylene blue
Munisamy Maniyazagan, Manzoor Hussain, Woo Seung Kang1, and Sun-Jae Kim†
  • Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea
  • 1Department of Metallurgical and Materials Engineering, Inha Technical College, Incheon 22212, Republic of Korea
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There is an urgent need to build effective and environmentally friendly photocatalysts due to environmental pollution caused by primarily organic molecules. Bismuth tungstate (Bi2WO6) nanocomposites have a wide range of compositions and morphologies, making them intriguing materials for environmental applications. Hierarchical Strontium-based Bismuth tungstate (Sr-Bi2WO6) catalysts made from these nanocomposites have improved photocatalytic effectiveness against organic contaminants. We created hierarchical strontium-based bismuth tungstate (Sr-Bi2WO6) composites using a single-step hydrothermal synthesis process. Fourier-transform infrared spectroscopy, X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, ultraviolet–visible diffuse reflectance spectra, specific surface area, and X-ray photoelectron spectroscopy were used to characterize the synthesized catalysts. The photocatalytic activity of hierarchical 15% Sr-Bi2WO6 composites for both the reduction of p-nitrophenol (4-NP) and degradation of methylene blue (MB) under UV light is outstanding. When reducing 4-NP to 4-aminophenol (4-AP) in the presence of NaBH4, the 15% Sr-Bi2WO6 catalyst demonstrated good catalytic activity and recycling properties. In comparison to pristine Bi2WO6, 5% Sr- Bi2WO6, 10% Sr-Bi2WO6, photocatalyst containing 15% Sr-Bi2WO6 perform exceptionally well, degrading 99.5 percent MB in 25 minutes and 99.4 percent 4-NP reduction in 15 minutes under UV light and NaBH4, respectively. This remarkable increase in photocatalytic activity could be attributed to the fact that Sr2+ may aid charge carrier separation by trapping Sr ions and creating oxygen vacancies.
Keywords:Hierarchical;Photocatalysts;Bismuth tungstate;4-Nitrophenol;Methylene blue
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