A Laser-Induced Graphene-Titanium(IV) Oxide Composite for Adsorption Enhanced Photodegradation of Methyl Orange

Numerous treatment methods such as biological digestion, chemical oxidation, and coagulation have been used to treat organic micropollutants. However, such wastewater treatment methods can be either inefficient, expensive, or environmentally unsound. Here, we embedded TiO nanoparticles in laser-indu...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2023-03, Vol.13 (5), p.947
Main Authors: Tesfahunegn, Brhane A, Kleinberg, Maurício Nunes, Powell, Camilah D, Arnusch, Christopher J
Format: Article
Language:English
Subjects:
Acid-base indicators
Activated carbon
adsorbate
Adsorption
Analysis
Anatase
By products
Carbon black
Catalysts
Chemicals
Coagulation
Composite materials
Dyes
emerging contaminants
Ethanol
Graphene
Identification and classification
laser-induced graphene
Lasers
Metal oxides
Metals
Morphology
nanocomposite
Nanomaterials
Nanoparticles
Oxidation
Oxides
Photocatalysis
photocatalyst
Photodegradation
Pollutant removal
Pollutants
Properties
Quantum dots
Scanning electron microscopy
Titanium
Titanium compounds
Titanium dioxide
titanium(IV) oxide
Wastewater treatment
Water pollution
Water treatment
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Summary:Numerous treatment methods such as biological digestion, chemical oxidation, and coagulation have been used to treat organic micropollutants. However, such wastewater treatment methods can be either inefficient, expensive, or environmentally unsound. Here, we embedded TiO nanoparticles in laser-induced graphene (LIG) and obtained a highly efficient photocatalyst composite with pollutant adsorption properties. TiO was added to LIG and lased to form a mixture of rutile and anatase TiO with a decreased band gap (2.90 ± 0.06 eV). The LIG/TiO composite adsorption and photodegradation properties were tested in solutions of a model pollutant, methyl orange (MO), and compared to the individual and mixed components. The adsorption capacity of the LIG/TiO composite was 92 mg/g using 80 mg/L MO, and together the adsorption and photocatalytic degradation resulted in 92.8% MO removal in 10 min. Adsorption enhanced photodegradation, and a synergy factor of 2.57 was seen. Understanding how LIG can modify metal oxide catalysts and how adsorption can enhance photocatalysis might lead to more effective pollutant removal and offer alternative treatment methods for polluted water.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano13050947