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The superiority of CNT over graphene in BiVO4 nanocomposites for visible light photocatalysis
Samadi, M
The superiority of CNT over graphene in BiVO4 nanocomposites for visible light photocatalysis
Samadi, M ; Sharif University of Technology | 2024
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- Type of Document: Article
- DOI: 10.1016/j.optmat.2024.115611
- Publisher: 2024
- Abstract:
- In this research, the effect of carbon analogs on the photocatalytic activity of BiVO4 nanocomposites is studied. Nanocomposites of BiVO4 with carbon nanotube (CNT) and reduced graphene oxide (RGO) were prepared. Scanning electron microscopy (SEM) showed BiVO4 particles adhered on RGO sheets, and CNTs were attached to the surface of BiVO4 nanoparticles. Different mass ratios of CNT and RGO were added to BiVO4 to optimize its photocatalytic activity. The photocatalyst containing 2.5%CNT demonstrates the highest efficiency in the photodegradation of methylene blue as a model organic pollutant. The reason for the greater photodegradation of the BiVO4-CNT as compared to BiVO4-RGO is analyzed by density functional theory (DFT) calculations, which was due to the different directions of the built-in electric field between carbon analogs and BiVO4. Furthermore, different photodegradation pathways are governed by pure BiVO4, BiVO4-RGO, and BiVO4-CNT photocatalysts, and a mechanistic study is elucidated based on examining various electron and hole scavengers. © 2024 Elsevier B.V
- Keywords:
- Bismuth vanadate ; Graphene oxide ; Multiwall carbon nanotubes ; Nanocarbon materials ; Nanocarbon-based photocatalysts ; Aromatic compounds ; Bismuth compounds ; Density functional theory ; Dyes ; Electric fields ; Graphene ; Multiwalled carbon nanotubes (MWCN) ; Nanocomposites ; Organic pollutants ; Photocatalytic activity ; Scanning electron microscopy ; Bismuth vanadates ; Graphene oxides ; Multiwall carbon nanotube ; Nano-carbon material ; Nanocarbon-based photocatalyst ; Nanocarbons ; Reduced graphene oxides ; Visible light ; Visible-light-active ; Solar light
- Source: Optical Materials ; Volume 153 , 2024 ; 09253467 (ISSN)
- URL: https://www.sciencedirect.com/science/article/abs/pii/S0925346724007948