Temperature effect on CuO nanoparticles via facile hydrothermal approach to effective utilization of UV–visible region for photocatalytic activity

Bruno, E.; Haris, M.; Mohan, A.; Senthilkumar, M.

doi:10.1007/s00339-021-05081-9

Cited by 20 publications

(4 citation statements)

References 44 publications

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“…The pure CuO nanoparticles under sunlight irradiation exhibit better degradation due to their e-h pair restriction [42]. The UV light irradiation induces the OH radicals which can dissociate the dye compounds into noxious products [43][44][45][46]. The lowest bandgap and combination of other materials enhanced the catalytic activity because of their large surface area and electron tapping on the surface [45][46][47].…”

Section: Photocatalyst Comparison Of Cuo-based Nanomaterialsmentioning

confidence: 99%

“…The UV light irradiation induces the OH radicals which can dissociate the dye compounds into noxious products [43][44][45][46]. The lowest bandgap and combination of other materials enhanced the catalytic activity because of their large surface area and electron tapping on the surface [45][46][47]. The large surface area and metal tapping on the surface increase the free radical formation.…”

Section: Photocatalyst Comparison Of Cuo-based Nanomaterialsmentioning

confidence: 99%

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Green method for synthesis and characterization of copper oxide nanoparticles using Mulberry plant extract and their antibacterial, antioxidant and photocatalytic activity

Shkir¹

2022

Phys. Scr.

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The green synthesis of metal oxide nanoparticles is treated to be an eco-friendly path and cost-effectiveness. Mulberry plant extract was used to synthesize CuO nanoparticles in this study. UV spectroscopy absorbance at 370 nm was used to analyze the resulting synthesized nanoparticles. The distribution of nanoparticles and particle sizes were discovered to be in the range of 40-60 nm using scanning electron microscopy. Copper nanoparticles have characteristic diffraction peaks in the X-ray diffraction spectrum at 38.81°, and 66.35° which correspond to lattice planes (111) and (202), respectively. The antioxidant and antibacterial activity of the CuO nanoparticles was tested against gram-positive and gram-negative microorganisms. The results support the hypothesis that green synthesized CuO NPs could be a viable treatment option for diseases caused by microbial pathogens. This fact-finding result is that Mulberry plant extract-based green synthesized CuO nanoparticles destroyed or considerably inhibited pathogen activity, as well as having high antioxidant activity.

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Section: Photocatalyst Comparison Of Cuo-based Nanomaterialsmentioning

confidence: 99%

Section: Photocatalyst Comparison Of Cuo-based Nanomaterialsmentioning

confidence: 99%

Green method for synthesis and characterization of copper oxide nanoparticles using Mulberry plant extract and their antibacterial, antioxidant and photocatalytic activity

Shkir¹

2022

Phys. Scr.

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“…[ 23 ] In addition, the location of the CuO Raman peak was mainly related to the size effect. [ 24 ] For the chrysanthemum‐like CuO–TiO 2 ‐2.5 nanocomposite film, in addition to the CuO Raman characteristic peak, a new Raman characteristic peak appeared at 145 cm −1 , which corresponded to the Eg peak of anatase TiO 2. [ 25 ] The Raman characteristic peak of Ag metal was not found in the chrysanthemum‐like CuO–TiO 2 ‐2.5‐Ag‐2.…”

Section: Resultsmentioning

confidence: 99%

Ag‐Decorated Chrysanthemum‐Like CuO–TiO₂ Thin Film: Enhanced Photocatalytic Degradation of Rhodamine B

Zhang,

Yang,

2024

Physica Status Solidi (a)

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Photocatalysis has attracted attention as a method for purifying pollutants, but how to simply and efficiently prepare catalyst films with high surface areas is still a challenge. Herein, a chrysanthemum‐like CuO–TiO2–Ag photocatalyst is prepared by anodic oxidation and magnetron sputtering. Scanning electron microscopy and energy dispersive spectrometry analyses show that Ag nanoparticles are uniformly modified on the surface of chrysanthemum‐like CuO–TiO2. Moreover, the influences of the thickness of the TiO2 film and the content of Ag nanoparticles on the degradation of rhodamine B (RhB) are studied by controlling the sputtering time. Among the prepared nanocomposites, the chrysanthemum‐like CuO–TiO2‐2.5‐Ag‐2 proves to have the maximal degradation level with regard to RhB by removing 91.16% RhB after 120 min under UV light. This is because the large surface area offers more active sites. In addition, the trapping experiments show that when CuO–TiO2 is decorated by Ag nanoparticles, this contributes to the movement of a number of photogenerated electrons from the conduction band of TiO2 to Ag, thereby improving the efficiency of charge transfer. The findings reveal that the photodegradation efficiency of the prepared nanocomposites in this study is greatly related to the thickness of the TiO2 film and the content of Ag nanoparticles.

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“…These samples were further analyzed using visible Raman-scattering spectroscopy (Figure S5). Raman spectroscopy of the pure CuO shows a band centered at 282 cm –1 (A g ), corresponding to phase rotations of CuO, and two bands centered at 332 and 618 cm –1 (B g ) which were assigned to the bending of CuO and symmetrical stretching of oxygen, respectively. , Raman spectroscopy of bulk MgO did not show any significant Raman bands because of its inversion symmetry, and the peaks located at 276 and 442 cm –1 correspond to the transverse acoustic (TA) phonon at the nanostructure zone boundary and the zone center, respectively . Raman spectroscopy of Cu/MgO shows a conspicuous band centered at 569 cm –1 , and its intensity gradually increased with a rise of the Mg content in Cu/MgO catalysts.…”

Section: Resultsmentioning

confidence: 99%

Revealing the Interaction between Cu and MgO in Cu/MgO Catalysts for CO Hydrogenation to CH₃OH

Liu,

Dang,

Cheng

et al. 2024

ACS Catal.

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In this work, the structure−performance relationship of Cu/MgO catalysts was established to unravel the role of MgO and the active sites for CO hydrogenation to CH 3 OH synthesis, by intrinsic kinetics, chemical titration, and a series of in situ (operando) spectroscopic characterizations. The turnover rates of CH 3 OH formation on Cu/MgO catalysts, especially when the Mg/(Mg + Cu) atomic ratio is 0.67, were significantly higher than that on monometallic Cu particles. We have demonstrated that the rates were insensitive to the particle size of Cu but depended linearly on the quantity of Cu−MgO interfacial sites. The interaction between Cu and MgO particles improved the dispersion of Cu particles and formed more highly active Cu−MgO interfacial sites as identified by precise characterization. Moreover, this study has also unraveled that both the HCO* and HCOO* species are predominantly reactive intermediates, and their sequential hydrogenation occurs concurrently for CH 3 OH formation over Cu/MgO catalysts during the CO−H 2 reaction.

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Temperature effect on CuO nanoparticles via facile hydrothermal approach to effective utilization of UV–visible region for photocatalytic activity

Cited by 20 publications

References 44 publications

Green method for synthesis and characterization of copper oxide nanoparticles using Mulberry plant extract and their antibacterial, antioxidant and photocatalytic activity

Green method for synthesis and characterization of copper oxide nanoparticles using Mulberry plant extract and their antibacterial, antioxidant and photocatalytic activity

Ag‐Decorated Chrysanthemum‐Like CuO–TiO₂ Thin Film: Enhanced Photocatalytic Degradation of Rhodamine B

Revealing the Interaction between Cu and MgO in Cu/MgO Catalysts for CO Hydrogenation to CH₃OH

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Temperature effect on CuO nanoparticles via facile hydrothermal approach to effective utilization of UV–visible region for photocatalytic activity

Cited by 20 publications

References 44 publications

Green method for synthesis and characterization of copper oxide nanoparticles using Mulberry plant extract and their antibacterial, antioxidant and photocatalytic activity

Green method for synthesis and characterization of copper oxide nanoparticles using Mulberry plant extract and their antibacterial, antioxidant and photocatalytic activity

Ag‐Decorated Chrysanthemum‐Like CuO–TiO2 Thin Film: Enhanced Photocatalytic Degradation of Rhodamine B

Revealing the Interaction between Cu and MgO in Cu/MgO Catalysts for CO Hydrogenation to CH3OH

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Ag‐Decorated Chrysanthemum‐Like CuO–TiO₂ Thin Film: Enhanced Photocatalytic Degradation of Rhodamine B

Revealing the Interaction between Cu and MgO in Cu/MgO Catalysts for CO Hydrogenation to CH₃OH