Recycling waste for energy: Reusing methyl orange dye-adsorbed polythiophene/Fe3O4 nanorods/reduced graphene oxide nanocomposite as a supercapacitor electrode
This study presents a sustainable waste-to-wealth approach by repurposing methyl orange (MO) dye-adsorbed polythiophene/iron oxide/reduced graphene oxide nanocomposite (PTh/Fe3O4/RGO) for dual functionality in wastewater treatment and energy storage. PTh/Fe3O4/RGO nanocomposite was initially employe...
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Elsevier
2025-06-01
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| Series: | Journal of Science: Advanced Materials and Devices |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2468217925000188 |
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| author | Ahmad Husain Asim Ali Sara A. Alqarni Khalid Ansari Mohtaram Danish Prem Gunnasegaran Mohammad Kanan Jayant Giri M. Kandasamy M.M.A. Khan Kyeong Tae Kang |
| author_facet | Ahmad Husain Asim Ali Sara A. Alqarni Khalid Ansari Mohtaram Danish Prem Gunnasegaran Mohammad Kanan Jayant Giri M. Kandasamy M.M.A. Khan Kyeong Tae Kang |
| author_sort | Ahmad Husain |
| collection | DOAJ |
| description | This study presents a sustainable waste-to-wealth approach by repurposing methyl orange (MO) dye-adsorbed polythiophene/iron oxide/reduced graphene oxide nanocomposite (PTh/Fe3O4/RGO) for dual functionality in wastewater treatment and energy storage. PTh/Fe3O4/RGO nanocomposite was initially employed as an effective adsorbent to remove harmful MO dye from wastewater. After successful adsorption, the dye-saturated PTh/Fe3O4/RGO was repurposed as a supercapacitor electrode to investigate its energy storage capabilities. Electrochemical tests before MO adsorption revealed that the pristine PTh/Fe3O4/RGO electrode demonstrated promising performance with a specific capacitance of 467.3 Fg−1 at 1 Ag−1 and excellent cyclic stability of 95.3% retention over 5000 Galvanostatic charge-discharge (GCD) cycles. Further, the maximum adsorption of MO by the PTh/Fe3O4/RGO was achieved under optimal conditions: pH 3, 2.5 gL−1 dosage, 120 min contact time, and 50 mgL−1 MO concentration. The adsorption behaviour was well-explained by the Langmuir isotherm, pseudo-second-order kinetics, and Dubinin-Radushkevich (D-R) isotherm, indicating a physical adsorption process with a monolayer capacity of 151.34 mgg−1. Thermodynamic analysis, with a positive enthalpy (ΔH°) and negative Gibbs free energy (ΔG°), confirmed that the process is endothermic and spontaneous. Desorption studies showed that 88.72% of the MO could be desorbed in the first cycle, with effective regeneration up to six cycles using NaOH. Post-adsorption, the material still retained significant supercapacitor properties, with a specific capacitance of 380.9 Fg−1 at 1 Ag−1 and 83.2% cyclic stability over 5000 GCD cycles. This study demonstrates a circular, sustainable approach that integrates waste treatment with energy storage, highlighting the potential of reusing materials for multifunctional applications. |
| format | Article |
| id | doaj-art-262d32362afd48afa845832986cb8762 |
| institution | OA Journals |
| issn | 2468-2179 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
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| series | Journal of Science: Advanced Materials and Devices |
| spelling | doaj-art-262d32362afd48afa845832986cb87622025-08-20T02:30:11ZengElsevierJournal of Science: Advanced Materials and Devices2468-21792025-06-0110210086510.1016/j.jsamd.2025.100865Recycling waste for energy: Reusing methyl orange dye-adsorbed polythiophene/Fe3O4 nanorods/reduced graphene oxide nanocomposite as a supercapacitor electrodeAhmad Husain0Asim Ali1Sara A. Alqarni2Khalid Ansari3Mohtaram Danish4Prem Gunnasegaran5Mohammad Kanan6Jayant Giri7M. Kandasamy8M.M.A. Khan9Kyeong Tae Kang10Institute of Power Engineering, Universiti Tenaga Nasional, Kajang, 43000, Selangor, Malaysia; Corresponding author.Tel. No. +60-147311436Department of Physics, KNU G-LAMP Project Group, Kyungpook National University, Daegu 41566, Republic of KoreaDepartment of Chemistry, College of Science, University of Jeddah, Jeddah, Saudi ArabiaDepartment of Environmental Science and Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004, India; Corresponding author.School of Architecture, Civil, Environmental and Energy Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of KoreaInstitute of Power Engineering, Universiti Tenaga Nasional, Kajang, 43000, Selangor, MalaysiaDepartment of Industrial Engineering, College of Engineering, University of Business and Technology, Jeddah 21448, Saudi Arabia; Department of Mechanical Engineering, College of Engineering, Zarqa University, Zarqa, JordanDepartment of Mechanical Engineering, Yeshwantrao Chavan College of Engineering, Nagpur, India; Division of Research and Development, Lovely Professional University, Phagwara, IndiaDepartment of Chemistry, K. Ramakrishnan College of Technology, Samayapuram, Tiruchirappalli, 621112, Tamil Nadu, IndiaApplied Science and Humanities Section, University Polytechnic, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh, 202002, IndiaDepartment of Physics, KNU G-LAMP Project Group, Kyungpook National University, Daegu 41566, Republic of Korea; Corresponding author.This study presents a sustainable waste-to-wealth approach by repurposing methyl orange (MO) dye-adsorbed polythiophene/iron oxide/reduced graphene oxide nanocomposite (PTh/Fe3O4/RGO) for dual functionality in wastewater treatment and energy storage. PTh/Fe3O4/RGO nanocomposite was initially employed as an effective adsorbent to remove harmful MO dye from wastewater. After successful adsorption, the dye-saturated PTh/Fe3O4/RGO was repurposed as a supercapacitor electrode to investigate its energy storage capabilities. Electrochemical tests before MO adsorption revealed that the pristine PTh/Fe3O4/RGO electrode demonstrated promising performance with a specific capacitance of 467.3 Fg−1 at 1 Ag−1 and excellent cyclic stability of 95.3% retention over 5000 Galvanostatic charge-discharge (GCD) cycles. Further, the maximum adsorption of MO by the PTh/Fe3O4/RGO was achieved under optimal conditions: pH 3, 2.5 gL−1 dosage, 120 min contact time, and 50 mgL−1 MO concentration. The adsorption behaviour was well-explained by the Langmuir isotherm, pseudo-second-order kinetics, and Dubinin-Radushkevich (D-R) isotherm, indicating a physical adsorption process with a monolayer capacity of 151.34 mgg−1. Thermodynamic analysis, with a positive enthalpy (ΔH°) and negative Gibbs free energy (ΔG°), confirmed that the process is endothermic and spontaneous. Desorption studies showed that 88.72% of the MO could be desorbed in the first cycle, with effective regeneration up to six cycles using NaOH. Post-adsorption, the material still retained significant supercapacitor properties, with a specific capacitance of 380.9 Fg−1 at 1 Ag−1 and 83.2% cyclic stability over 5000 GCD cycles. This study demonstrates a circular, sustainable approach that integrates waste treatment with energy storage, highlighting the potential of reusing materials for multifunctional applications.http://www.sciencedirect.com/science/article/pii/S2468217925000188PTh/Fe₃O₄/RGO nanocompositeMethyl orange adsorptionEnergy storageSupercapacitor electrodeWaste-to-wealth conceptCircular sustainability |
| spellingShingle | Ahmad Husain Asim Ali Sara A. Alqarni Khalid Ansari Mohtaram Danish Prem Gunnasegaran Mohammad Kanan Jayant Giri M. Kandasamy M.M.A. Khan Kyeong Tae Kang Recycling waste for energy: Reusing methyl orange dye-adsorbed polythiophene/Fe3O4 nanorods/reduced graphene oxide nanocomposite as a supercapacitor electrode Journal of Science: Advanced Materials and Devices PTh/Fe₃O₄/RGO nanocomposite Methyl orange adsorption Energy storage Supercapacitor electrode Waste-to-wealth concept Circular sustainability |
| title | Recycling waste for energy: Reusing methyl orange dye-adsorbed polythiophene/Fe3O4 nanorods/reduced graphene oxide nanocomposite as a supercapacitor electrode |
| title_full | Recycling waste for energy: Reusing methyl orange dye-adsorbed polythiophene/Fe3O4 nanorods/reduced graphene oxide nanocomposite as a supercapacitor electrode |
| title_fullStr | Recycling waste for energy: Reusing methyl orange dye-adsorbed polythiophene/Fe3O4 nanorods/reduced graphene oxide nanocomposite as a supercapacitor electrode |
| title_full_unstemmed | Recycling waste for energy: Reusing methyl orange dye-adsorbed polythiophene/Fe3O4 nanorods/reduced graphene oxide nanocomposite as a supercapacitor electrode |
| title_short | Recycling waste for energy: Reusing methyl orange dye-adsorbed polythiophene/Fe3O4 nanorods/reduced graphene oxide nanocomposite as a supercapacitor electrode |
| title_sort | recycling waste for energy reusing methyl orange dye adsorbed polythiophene fe3o4 nanorods reduced graphene oxide nanocomposite as a supercapacitor electrode |
| topic | PTh/Fe₃O₄/RGO nanocomposite Methyl orange adsorption Energy storage Supercapacitor electrode Waste-to-wealth concept Circular sustainability |
| url | http://www.sciencedirect.com/science/article/pii/S2468217925000188 |
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