The Effect of Composition on the Properties and Application of CuO-NiO Nanocomposites Synthesized Using a Saponin-Green/Microwave-Assisted Hydrothermal Method
In this study, we explored the formation of CuO nanoparticles, NiO nanoflakes, and CuO-NiO nanocomposites using saponin extract and a microwave-assisted hydrothermal method. Five green synthetic samples were prepared using aqueous saponin extract and a microwave-assisted hydrothermal procedure at 20...
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MDPI AG
2024-04-01
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| Series: | International Journal of Molecular Sciences |
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| Online Access: | https://www.mdpi.com/1422-0067/25/7/4119 |
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| author | Amnah Al-Yunus Wafa Al-Arjan Hassan Traboulsi Manal Hessien |
| author_facet | Amnah Al-Yunus Wafa Al-Arjan Hassan Traboulsi Manal Hessien |
| author_sort | Amnah Al-Yunus |
| collection | DOAJ |
| description | In this study, we explored the formation of CuO nanoparticles, NiO nanoflakes, and CuO-NiO nanocomposites using saponin extract and a microwave-assisted hydrothermal method. Five green synthetic samples were prepared using aqueous saponin extract and a microwave-assisted hydrothermal procedure at 200 °C for 30 min. The samples were pristine copper oxide (100C), 75% copper oxide–25% nickel oxide (75C25N), 50% copper oxide–50% nickel oxide (50C50N), 25% copper oxide–75% nickel oxide (25C75N), and pristine nickel oxide (100N). The samples were characterized using FT-IR, XRD, XPS, SEM, and TEM. The XRD results showed that copper oxide and nickel oxide formed monoclinic and cubic phases, respectively. The morphology of the samples was useful and consisted of copper oxide nanoparticles and nickel oxide nanoflakes. XPS confirmed the +2 oxidation state of both the copper and nickel ions. Moreover, the optical bandgaps of copper oxide and nickel oxide were determined to be in the range of 1.29–1.6 eV and 3.36–3.63 eV, respectively, and the magnetic property studies showed that the synthesized samples exhibited ferromagnetic and superparamagnetic properties. In addition, the catalytic activity was tested against para-nitrophenol, demonstrating that the catalyst efficiency gradually improved in the presence of CuO. The highest rate constants were obtained for the 100C and 75C25N samples, with catalytic efficiencies of 98.7% and 78.2%, respectively, after 45 min. |
| first_indexed | 2024-04-24T10:42:38Z |
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| institution | Directory Open Access Journal |
| issn | 1661-6596 1422-0067 |
| language | English |
| last_indexed | 2024-04-24T10:42:38Z |
| publishDate | 2024-04-01 |
| publisher | MDPI AG |
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| series | International Journal of Molecular Sciences |
| spelling | doaj.art-c62c915dfcb74a96b6fe2a426642e2a22024-04-12T13:20:42ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672024-04-01257411910.3390/ijms25074119The Effect of Composition on the Properties and Application of CuO-NiO Nanocomposites Synthesized Using a Saponin-Green/Microwave-Assisted Hydrothermal MethodAmnah Al-Yunus0Wafa Al-Arjan1Hassan Traboulsi2Manal Hessien3Department of Chemistry, College of Science, King Faisal University, Al Ahsa 31982, Saudi ArabiaDepartment of Chemistry, College of Science, King Faisal University, Al Ahsa 31982, Saudi ArabiaDepartment of Chemistry, College of Science, King Faisal University, Al Ahsa 31982, Saudi ArabiaDepartment of Chemistry, College of Science, King Faisal University, Al Ahsa 31982, Saudi ArabiaIn this study, we explored the formation of CuO nanoparticles, NiO nanoflakes, and CuO-NiO nanocomposites using saponin extract and a microwave-assisted hydrothermal method. Five green synthetic samples were prepared using aqueous saponin extract and a microwave-assisted hydrothermal procedure at 200 °C for 30 min. The samples were pristine copper oxide (100C), 75% copper oxide–25% nickel oxide (75C25N), 50% copper oxide–50% nickel oxide (50C50N), 25% copper oxide–75% nickel oxide (25C75N), and pristine nickel oxide (100N). The samples were characterized using FT-IR, XRD, XPS, SEM, and TEM. The XRD results showed that copper oxide and nickel oxide formed monoclinic and cubic phases, respectively. The morphology of the samples was useful and consisted of copper oxide nanoparticles and nickel oxide nanoflakes. XPS confirmed the +2 oxidation state of both the copper and nickel ions. Moreover, the optical bandgaps of copper oxide and nickel oxide were determined to be in the range of 1.29–1.6 eV and 3.36–3.63 eV, respectively, and the magnetic property studies showed that the synthesized samples exhibited ferromagnetic and superparamagnetic properties. In addition, the catalytic activity was tested against para-nitrophenol, demonstrating that the catalyst efficiency gradually improved in the presence of CuO. The highest rate constants were obtained for the 100C and 75C25N samples, with catalytic efficiencies of 98.7% and 78.2%, respectively, after 45 min.https://www.mdpi.com/1422-0067/25/7/4119saponin aqueous extractgreen microwave-assisted hydrothermalmonoclinic copper oxidecubic nickel oxidemagnetic propertiesoptical bandgap |
| spellingShingle | Amnah Al-Yunus Wafa Al-Arjan Hassan Traboulsi Manal Hessien The Effect of Composition on the Properties and Application of CuO-NiO Nanocomposites Synthesized Using a Saponin-Green/Microwave-Assisted Hydrothermal Method International Journal of Molecular Sciences saponin aqueous extract green microwave-assisted hydrothermal monoclinic copper oxide cubic nickel oxide magnetic properties optical bandgap |
| title | The Effect of Composition on the Properties and Application of CuO-NiO Nanocomposites Synthesized Using a Saponin-Green/Microwave-Assisted Hydrothermal Method |
| title_full | The Effect of Composition on the Properties and Application of CuO-NiO Nanocomposites Synthesized Using a Saponin-Green/Microwave-Assisted Hydrothermal Method |
| title_fullStr | The Effect of Composition on the Properties and Application of CuO-NiO Nanocomposites Synthesized Using a Saponin-Green/Microwave-Assisted Hydrothermal Method |
| title_full_unstemmed | The Effect of Composition on the Properties and Application of CuO-NiO Nanocomposites Synthesized Using a Saponin-Green/Microwave-Assisted Hydrothermal Method |
| title_short | The Effect of Composition on the Properties and Application of CuO-NiO Nanocomposites Synthesized Using a Saponin-Green/Microwave-Assisted Hydrothermal Method |
| title_sort | effect of composition on the properties and application of cuo nio nanocomposites synthesized using a saponin green microwave assisted hydrothermal method |
| topic | saponin aqueous extract green microwave-assisted hydrothermal monoclinic copper oxide cubic nickel oxide magnetic properties optical bandgap |
| url | https://www.mdpi.com/1422-0067/25/7/4119 |
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