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<sub>2</sub> nan...
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| Format: | Article |
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MDPI AG
2023-03-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/5/947 |
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| author | Brhane A. Tesfahunegn Maurício Nunes Kleinberg Camilah D. Powell Christopher J. Arnusch |
| author_facet | Brhane A. Tesfahunegn Maurício Nunes Kleinberg Camilah D. Powell Christopher J. Arnusch |
| author_sort | Brhane A. Tesfahunegn |
| collection | DOAJ |
| description | 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<sub>2</sub> nanoparticles in laser-induced graphene (LIG) and obtained a highly efficient photocatalyst composite with pollutant adsorption properties. TiO<sub>2</sub> was added to LIG and lased to form a mixture of rutile and anatase TiO<sub>2</sub> with a decreased band gap (2.90 ± 0.06 eV). The LIG/TiO<sub>2</sub> 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<sub>2</sub> 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. |
| first_indexed | 2024-03-11T07:16:00Z |
| format | Article |
| id | doaj.art-df5f5f444b3246bca7a5ad560d975026 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T07:16:00Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-df5f5f444b3246bca7a5ad560d9750262023-11-17T08:18:44ZengMDPI AGNanomaterials2079-49912023-03-0113594710.3390/nano13050947A Laser-Induced Graphene-Titanium(IV) Oxide Composite for Adsorption Enhanced Photodegradation of Methyl OrangeBrhane A. Tesfahunegn0Maurício Nunes Kleinberg1Camilah D. Powell2Christopher J. Arnusch3Department of Desalination and Water Treatment, Zuckerberg Institute for Water Research, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede-Boqer Campus, Midreshet Ben-Gurion 8499000, IsraelDepartment of Desalination and Water Treatment, Zuckerberg Institute for Water Research, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede-Boqer Campus, Midreshet Ben-Gurion 8499000, IsraelDepartment of Desalination and Water Treatment, Zuckerberg Institute for Water Research, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede-Boqer Campus, Midreshet Ben-Gurion 8499000, IsraelDepartment of Desalination and Water Treatment, Zuckerberg Institute for Water Research, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede-Boqer Campus, Midreshet Ben-Gurion 8499000, IsraelNumerous 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<sub>2</sub> nanoparticles in laser-induced graphene (LIG) and obtained a highly efficient photocatalyst composite with pollutant adsorption properties. TiO<sub>2</sub> was added to LIG and lased to form a mixture of rutile and anatase TiO<sub>2</sub> with a decreased band gap (2.90 ± 0.06 eV). The LIG/TiO<sub>2</sub> 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<sub>2</sub> 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.https://www.mdpi.com/2079-4991/13/5/947laser-induced graphenetitanium(IV) oxidenanocompositeadsorbatephotocatalystemerging contaminants |
| spellingShingle | Brhane A. Tesfahunegn Maurício Nunes Kleinberg Camilah D. Powell Christopher J. Arnusch A Laser-Induced Graphene-Titanium(IV) Oxide Composite for Adsorption Enhanced Photodegradation of Methyl Orange Nanomaterials laser-induced graphene titanium(IV) oxide nanocomposite adsorbate photocatalyst emerging contaminants |
| title | A Laser-Induced Graphene-Titanium(IV) Oxide Composite for Adsorption Enhanced Photodegradation of Methyl Orange |
| title_full | A Laser-Induced Graphene-Titanium(IV) Oxide Composite for Adsorption Enhanced Photodegradation of Methyl Orange |
| title_fullStr | A Laser-Induced Graphene-Titanium(IV) Oxide Composite for Adsorption Enhanced Photodegradation of Methyl Orange |
| title_full_unstemmed | A Laser-Induced Graphene-Titanium(IV) Oxide Composite for Adsorption Enhanced Photodegradation of Methyl Orange |
| title_short | A Laser-Induced Graphene-Titanium(IV) Oxide Composite for Adsorption Enhanced Photodegradation of Methyl Orange |
| title_sort | laser induced graphene titanium iv oxide composite for adsorption enhanced photodegradation of methyl orange |
| topic | laser-induced graphene titanium(IV) oxide nanocomposite adsorbate photocatalyst emerging contaminants |
| url | https://www.mdpi.com/2079-4991/13/5/947 |
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