Giday G. Welegergs, H. G. Gebretinsae, M. T. Girmay, Azole Sindelo, Abebe Tedla, Z. Y. Nuru, S. Dube, Malik Maaza, Tebello Nyokong
{"title":"等离子体负载银(Ag)介孔CuO纳米复合材料光降解水中亚甲基蓝","authors":"Giday G. Welegergs, H. G. Gebretinsae, M. T. Girmay, Azole Sindelo, Abebe Tedla, Z. Y. Nuru, S. Dube, Malik Maaza, Tebello Nyokong","doi":"10.1007/s10562-025-05100-x","DOIUrl":null,"url":null,"abstract":"<div><p>Water decontamination remains a challenge in many developing and developed countries. And thus, efficient and affordable approaches are urgently needed. In this research work, a heterogeneous photocatalyst of Ag@CuO nanocomposites (NCs) has been successfully biogenic synthesized using <i>Cactus pears</i> extracts for the decomposition of methylene blue (MB) under visible light irradiation. The obtained nanocomposites consisted of plasmonic silver (Ag) NPs embedded in a semiconductor matrix of copper oxide (CuO). The scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), and Rutherford backscattering spectrometry (RBS) were employed to characterize the morphology, and microstructures of the samples. The SEM images of Ag@CuO NCs confirm the presence of better dispersibility of Ag nanoparticles (NPs) in the nanorod-like surface of CuO. XRD patterns revealed a well-crystalline nature of monoclinic phase of CuO and face centered cubic (fcc) of Ag metal, and EDX spectra confirms the compositions of the nanocomposites. The FT-IR confirmed the secondary metabolites in <i>Cactus pears</i> for the formation of Ag NPs, and Ag@CuO NCs. The Brunauer-Emmett-Teller (BET) surface area of CuO NPs, and Ag@CuO NCs were achieved from N<sub>2</sub> adsorption/desorption isotherm and revealed a specific area of 8.67 m<sup>2</sup> g<sup>−1</sup> and 15.14 m<sup>2</sup> g<sup>−1</sup>, respectively with a mesoporous nature. The heterogeneous biogenic Ag@CuO NCs was evaluated for the photocatalytic degradation of methylene blue (MB) dye upon light irradiation and demonstrated higher degradation kinetics rate (k = 0.0578 min<sup>−1</sup>) compared to CuO (k = 0.0362 min<sup>−1</sup>). The superior photocatalysis activity of Ag@CuO NCs is ascribed to the synergistic effects of enhanced light absorption, higher adsorption capacity, improved charge-separation and high surface area.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 8","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10562-025-05100-x.pdf","citationCount":"0","resultStr":"{\"title\":\"Plasmonic Silver (Ag) Supported Mesoporous CuO Nanocomposites for Photodegradation of Methylene Blue in Water\",\"authors\":\"Giday G. Welegergs, H. G. Gebretinsae, M. T. Girmay, Azole Sindelo, Abebe Tedla, Z. Y. Nuru, S. 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The SEM images of Ag@CuO NCs confirm the presence of better dispersibility of Ag nanoparticles (NPs) in the nanorod-like surface of CuO. XRD patterns revealed a well-crystalline nature of monoclinic phase of CuO and face centered cubic (fcc) of Ag metal, and EDX spectra confirms the compositions of the nanocomposites. The FT-IR confirmed the secondary metabolites in <i>Cactus pears</i> for the formation of Ag NPs, and Ag@CuO NCs. The Brunauer-Emmett-Teller (BET) surface area of CuO NPs, and Ag@CuO NCs were achieved from N<sub>2</sub> adsorption/desorption isotherm and revealed a specific area of 8.67 m<sup>2</sup> g<sup>−1</sup> and 15.14 m<sup>2</sup> g<sup>−1</sup>, respectively with a mesoporous nature. The heterogeneous biogenic Ag@CuO NCs was evaluated for the photocatalytic degradation of methylene blue (MB) dye upon light irradiation and demonstrated higher degradation kinetics rate (k = 0.0578 min<sup>−1</sup>) compared to CuO (k = 0.0362 min<sup>−1</sup>). 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Plasmonic Silver (Ag) Supported Mesoporous CuO Nanocomposites for Photodegradation of Methylene Blue in Water
Water decontamination remains a challenge in many developing and developed countries. And thus, efficient and affordable approaches are urgently needed. In this research work, a heterogeneous photocatalyst of Ag@CuO nanocomposites (NCs) has been successfully biogenic synthesized using Cactus pears extracts for the decomposition of methylene blue (MB) under visible light irradiation. The obtained nanocomposites consisted of plasmonic silver (Ag) NPs embedded in a semiconductor matrix of copper oxide (CuO). The scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), and Rutherford backscattering spectrometry (RBS) were employed to characterize the morphology, and microstructures of the samples. The SEM images of Ag@CuO NCs confirm the presence of better dispersibility of Ag nanoparticles (NPs) in the nanorod-like surface of CuO. XRD patterns revealed a well-crystalline nature of monoclinic phase of CuO and face centered cubic (fcc) of Ag metal, and EDX spectra confirms the compositions of the nanocomposites. The FT-IR confirmed the secondary metabolites in Cactus pears for the formation of Ag NPs, and Ag@CuO NCs. The Brunauer-Emmett-Teller (BET) surface area of CuO NPs, and Ag@CuO NCs were achieved from N2 adsorption/desorption isotherm and revealed a specific area of 8.67 m2 g−1 and 15.14 m2 g−1, respectively with a mesoporous nature. The heterogeneous biogenic Ag@CuO NCs was evaluated for the photocatalytic degradation of methylene blue (MB) dye upon light irradiation and demonstrated higher degradation kinetics rate (k = 0.0578 min−1) compared to CuO (k = 0.0362 min−1). The superior photocatalysis activity of Ag@CuO NCs is ascribed to the synergistic effects of enhanced light absorption, higher adsorption capacity, improved charge-separation and high surface area.
期刊介绍:
Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.