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Volume 14, Issue 4
  • ISSN: 2210-6812
  • E-ISSN: 2210-6820

Abstract

Background

The discharging of crystal violet dye can contaminate water and soil, which causes serious environmental pollution and health problems for human beings. SbO/CaAlO nanoscale composites possess good catalytic performance for crystal violet removal. This study aimed to research the effects of the SbO content, content of the nanoscale composites, and metallic cations on the photocatalytic activity of the SbO/CaAlO nanoscale composites.

Objective

The objective was to synthesize SbO/CaAlO nanoscale composites by a simple route and research the photocatalytic activity for crystal violet degradation.

Methods

SbO/CaAlO nanoscale composites were obtained a simple route using Ca aluminate nanosheets and Sb acetate. The photocatalytic activity of the SbO/CaAlO nanoscale composites was evaluated using crystal violet as a model pollutant.

Results

The obtained nanoscale composites consisted of orthorhombic CaAlO and orthorhombic SbO phases, nanosheets with a thickness of about 50 nm, and nanoparticles with a size of less than 100 nm. SbO enhanced the light absorption ability of the Ca aluminate nanosheets. The nanoscale composites with the SbO content of 20wt.% decreased to 3.03 eV, which is beneficial for improving the photo-degradation ability of the organic pollutants. The reaction ratio constant for crystal violet (CV) degradation was 0.045 min-1 and 0.055 min-1 using the nanoscale composites with SbO content of 10wt.% and 20wt.%, respectively, which was 1.4 and 1.7 times higher than that of the Ca aluminate nanosheets (0.032 min-1). Hydroxyl radicals (●OH), hole (h+), and superoxide radicals (●O−) were reaction-active species for CV removal. SbO/CaAlO nanoscale composites exhibited fast interfacial charge transfer and efficient separation ability of photo-induced electron-hole pairs, which enhanced the photocatalytic activity of the Ca aluminate nanosheets for CV degradation.

Conclusion

The SbO/CaAlO nanoscale composites can be easily separated and reused, showing great potential for practical application in wastewater treatment.

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2024-11-29

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Photocatalytic Activity of the Sb2O3/Ca5Al6O14 Nanoscale Composites for Crystal Violet Degradation
Nanoscience & Nanotechnology-Asia 14, E22106812319718 (2024); https://doi.org/10.2174/0122106812319718240812112538
/content/journals/nanoasi/10.2174/0122106812319718240812112538
/content/journals/nanoasi/10.2174/0122106812319718240812112538
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  • Article Type:     Research Article
Keyword(s): Ca aluminate; crystal violet; CV degradation; electron microscopy; nanoscale composites; Sb2O3

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