Green route synthesis of nanoporous copper oxide for efficient supercapacitor and capacitive deionization performances |
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Authors: | Paskalis Sahaya Murphin Kumar Htet Htet Kyaw Myo Tay Zar Myint Lamya Al-Haj Ala'a H. Al-Muhtaseb Mohammed Al-Abri Vembuli Thanigaivel Vinoth Kumar Ponnusamy |
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Affiliation: | 1. Department of Petroleum and Chemical Engineering, College of Engineering, Sultan Qaboos University, Muscat, Oman;2. Nanotechnology Research Center, Sultan Qaboos University, Muscat, Oman;3. Department of Physics, College of Science, Sultan Qaboos University, Muscat, Oman;4. Department of Biology, College of Science, Sultan Qaboos University, Muscat, Oman;5. Department of Applied Science and Technology, Anna University, Chennai, India;6. Research Center for Environmental Medicine, and Department of Medicinal and Applied Chemistry, Kaohsiung Medical University (KMU), Kaohsiung City, Taiwan |
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Abstract: | We demonstrate a simple template-free green method to prepare copper oxide (CuO) nanoporous material using copper acetate as a single precursor with Piper nigrum (Indian black pepper) dried fruit extract as a reducing medium under microwave irradiation. The surface properties and morphology of the obtained CuO material were assessed using powder X-ray diffractometer, X-ray photoelectron spectrometer, field-emission scanning electron microscope with elemental mapping analysis, focused ion beam high-resolution transmission electron microscope, and N2 adsorption-isotherm techniques. The characterization results reveal that the prepared CuO is a single monoclinic crystalline phase, and nanoporous in morphology with a specific surface area of 81.23 m2 g−1 and containing pore sizes between 3–8 nm. Nanoporous CuO showed excellent electrochemical energy storage performance with the specific capacitance of 238 Fg−1 at 5 mVs−1 when compared with commercially available CuO (75 Fg−1). Also, nanoporous CuO showed efficient desalting performance in the capacitive deionization system. This eco-friendly synthesis derived nanoporous CuO can be applied as high-performance supercapacitor material for high-energy storage devices and desalination processes. |
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Keywords: | desalination high-performance supercapacitor microwave-assisted synthesis nanoporous copper oxide plant-extract template-free |
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