Synthesis of Tungsten-Modified Sn3O4 through the Cetyltrimethylammonium Bromide-Assisted Solvothermal Method for Dye Decolorization under Visible Light Irradiation

Novel tungsten-modified mixed-valence tin oxides (Sn3O4) with two oxidation numbers, such as Sn2+ and Sn4+, were successfully prepared by the cetyltrimethylammonium bromide (CTAB)-assisted solvothermal method in one-step using tin (II) chloride dihydrate and sodium tungstate (IV) dihydrate as the pr...

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Bibliographic Details
Published in:Catalysts 2023-08, Vol.13 (8), p.1179
Main Authors: Furukawa, Mai, Iwamoto, Daichi, Inamori, Koki, Tateishi, Ikki, Katsumata, Hideyuki, Kaneco, Satoshi
Format: Article
Language:English
Subjects:
Adsorption
Alternative energy sources
Catalysts
Catalytic activity
Cetyltrimethylammonium bromide
Chemical reactions
Crystal structure
Decoloring
decolorization
Dyes
Efficiency
Electromagnetic absorption
Light
Light irradiation
Metal oxides
Morphology
Optical properties
Oxidation
Photocatalysis
Photodegradation
Pollutants
Polyethylene glycol
Scanning electron microscopy
Sn3O4
solvothermal method
Tin
Tin oxides
Toxicity
Tungsten
visible light irradiation
Water pollution
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Summary:Novel tungsten-modified mixed-valence tin oxides (Sn3O4) with two oxidation numbers, such as Sn2+ and Sn4+, were successfully prepared by the cetyltrimethylammonium bromide (CTAB)-assisted solvothermal method in one-step using tin (II) chloride dihydrate and sodium tungstate (IV) dihydrate as the precursors for dye degradation of methyl orange (MO) under visible light irradiation. The synthesized materials were characterized by various techniques to investigate the surface/structural morphology and the optical property. The presence of tungsten and the optimized amount of CTAB in the preparation method were favorable for the photocatalytic dye degradation reaction. In particular, when 0.03 of CTAB was added to W-modified Sn3O4 (W-Sn3O4@CTAB) and its concentration was 0.6 mg/mL, 10 mg/L of MO could be decolorized almost completely in 40 min, with the apparent reaction rate constant of 0.0496 min−1. The improvement of photocatalytic activity for this proposed W-Sn3O4 results from increased reduction power, enhanced separation of electron–hole pairs, extended visible light absorption range, and optimized band structure by CTAB additive. The radical trapping experiments showed that the main reactive species during the photocatalytic reaction are superoxide ions. The developed photocatalysts may contribute to the development of environmental improvement technology.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal13081179