Spontaneous Adsorption and Efficient Photodegradation of Indigo Carmine under Visible Light by Bismuth Oxyiodide Nanoparticles Fabricated Entirely at Room Temperature

Bismuth oxyiodide (BiOI) is a targeted material for its relative safety and photocatalytic activity under visible light. In this study, a successful simple and energy-saving route was applied to prepare BiOI through a sonochemical process at room temperature. The characterization of the prepared BiO...

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Bibliographic Details
Published in:Inorganics 2022-05, Vol.10 (5), p.65
Main Authors: Elamin, Mohamed R., Ibnaouf, Khalid H., Elamin, Nuha Y., Adam, Fatima A., Alolayan, Abdulrahman H., Abdulkhair, Babiker Y.
Format: Article
Language:English
Subjects:
Adsorption
Analysis
Bismuth
bismuth oxyiodide
Catalysts
Catalytic activity
Chemical processes
Energy gap
Fourier transforms
Identification and classification
Image transmission
Indigo
indigo carmine
Light
Methods
Nanomaterials
Nanoparticles
Nitrates
Organic carbon
Photocatalysis
Photodegradation
Pollutants
Properties
Radiation
Room temperature
Scanning electron microscopy
sonochemical synthesis
Total organic carbon
Transmission electron microscopes
Tungsten
visible-light photodegradation
Water treatment
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Summary:Bismuth oxyiodide (BiOI) is a targeted material for its relative safety and photocatalytic activity under visible light. In this study, a successful simple and energy-saving route was applied to prepare BiOI through a sonochemical process at room temperature. The characterization of the prepared BiOI was conducted by physical means. The transmission electron microscope (TEM) image showed that the BiOI comprises nanoparticles of about 20 nm. Also, the surface area of the BiOI was found to be 34.03 m2 g−1 with an energy gap of 1.835 eV. The adsorption and photocatalytic capacities of the BiOI were examined for the indigo carmine dye (IC) as a model water-pollutant via the batch experiment methodology. The solution parameters were optimized, including pH, contact time, IC concentration, and temperature. Worth mentioning that an adsorption capacity of 185 mg·g−1 was obtained from 100 mg L−1 IC solution at 25 °C within 60 min as an equilibrium time. In addition, the BiOI showed a high degradation efficiency towards IC under tungsten lamb (80 W), where 93% was removed within 180 min, and the complete degradation was accomplished in 240 min. The fabricated BiOI nanoparticles completely mineralized the IC under artificial visible light, as indicated by the total organic carbon analysis.
ISSN:2304-6740
2304-6740
DOI:10.3390/inorganics10050065