Tailoring oxides of copper-Cu2O and CuO nanoparticles and evaluation of organic dyes degradation

Raghav, Ragini; Aggarwal, Priyanka; Srivastava, Sudha

doi:10.1063/1.4945198

Cited by 29 publications

(8 citation statements)

References 19 publications

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“…Pan et al fabricated CuO photocatalyst via Pyrus Pyrifolia leaf extract method showed the decolorization percentage of methylene blue around 45% at 30 h under visible irradiation (Sundaramurthy & Parthiban 2015). After introduction of chemical reduction, the photocatalytic activity of CuO photocatalyst was almost 82% dye decolorization at the same time under UV light irradiation (Raghav et al 2016), the highest decolorization of MB was recorded 93% at 120 min under heating of 600°C (sunlight) by electrochemically prepared of CuO NPs (Katwal et al 2015). Manjari et al reported an biosynthesized CuO NPs showed 91% conversion efficiency for 6 cycles in the decolorization of methylene blue (Manjari et al 2017).…”

Section: Introductionmentioning

confidence: 99%

CuO as efficient photo catalyst for photocatalytic decoloration of wastewater containing Azo dyes

Ramesh¹

2021

Water Practice and Technology

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Cupric oxide nanoparticles (CuO NPs) were prepared via a chemical precipitation method using the precursor of copper (II) nitrate trihydrate. X-ray diffraction analysis confirms that the CuO NPs were monoclinic crystal structure. The energy band gap of CuO NPs was found to be about 1.76 eV. The obtained CuO NPs were used as a photo catalyst to decolorize various dyes, such as methylene blue (MB), acid yellow 23 (AY 23) and reactive black 5 (RB 5), with a low concentration in the presence of visible light. The results show that the highest decolorization achieved was 67.8% and 66.3% for RB-5 dye and AY-23 dye, while 43.5% for MB dye from aqueous solution at 5 h illumination. The obtained CuO NPs were used as a photo catalyst to decolorize various dyes, RB-5, AY-23 and MB dye obeys pseudo first order kinetics with values of −0.112, −0.174 and −0.201 h−1, respectively.

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Section: Introductionmentioning

confidence: 99%

CuO as efficient photo catalyst for photocatalytic decoloration of wastewater containing Azo dyes

Ramesh¹

2021

Water Practice and Technology

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“…As can be seen in Figure 11, nanoparticles deposited by laser ablation in open air (samples a and c) show a higher rate of ion release than Cu-NPs deposited in argon (samples b and d), being almost four times higher in the first 8 h. This suggests that although the mass of copper nanoparticles deposited in each sample is the same (2 mg), the composition of the environment determines to a The mean peak, present in all samples at approximately 300 nm, is characteristic of surface plasmon resonance (SPR), a feature of CuO nanoparticles [25,26], although curves corresponding to samples a and b seem to be a convolution of two peaks. The mean peak corresponds to CuO and there is another at 350 nm, which corresponds with Cu 2 O [25]. This hypothesis is supported by the results previously obtained by means of the crystallographic analysis.…”

Section: Copper Ion Releasementioning

confidence: 93%

“…In order to study the optical properties of the obtained nanoparticles, the absorbance of each sample was measured in the range of 280-800 nm by UV-VIS spectroscopy (Figure 10). The mean peak, present in all samples at approximately 300 nm, is characteristic of surface plasmon resonance (SPR), a feature of CuO nanoparticles [25,26], although curves corresponding to samples a and b seem to be a convolution of two peaks. The mean peak corresponds to CuO and there is another at 350 nm, which corresponds with Cu2O [25].…”

Section: Uv-vis Absorptionmentioning

confidence: 99%

“…The mean peak, present in all samples at approximately 300 nm, is characteristic of surface plasmon resonance (SPR), a feature of CuO nanoparticles [25,26], although curves corresponding to samples a and b seem to be a convolution of two peaks. The mean peak corresponds to CuO and there is another at 350 nm, which corresponds with Cu2O [25]. This hypothesis is supported by the results previously obtained by means of the crystallographic analysis.…”

Section: Uv-vis Absorptionmentioning

confidence: 99%

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Fabrication and Deposition of Copper and Copper Oxide Nanoparticles by Laser Ablation in Open Air

et al. 2020

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The proximity of the "post-antibiotic era", where infections and minor injuries could be a cause of death, there are urges to seek an alternative for the cure of infectious diseases. Copper nanoparticles and their huge potential as a bactericidal agent could be a solution. In this work, Cu and Cu oxide nanoparticles were synthesized by laser ablation in open air and in argon atmosphere using 532 and 1064 nm radiation generated by nanosecond and picosecond Nd:YVO 4 lasers, respectively, to be directly deposited onto Ti substrates. Size, morphology, composition and the crystalline structure of the produced nanoparticles have been studied by the means of field emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), the energy dispersive spectroscopy of X-rays (EDS), selected area electron diffraction (SAED) and X-ray diffraction (XRD). The UV-VIS absorbance of the thin layer of nanoparticles was also measured, and the antibacterial capacity of the obtained deposits tested against Staphylococcus aureus. The obtained deposits consisted of porous coatings composed of copper and copper oxide nanoparticles interconnected to form chain-like aggregates. The use of the argon atmosphere contributed to reduce significantly the formation of Cu oxide species. The synthesized and deposited nanoparticles exhibited an inhibitory effect upon S. aureus.

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“…[18] The results match with the pristine Cu 2 O powder (Figure S3, Supporting Information), which is in agreement with the previous reports. [18,24] For the n-g-C 3 N 4 composite film, the XRD pattern identified the presence of g-C 3 N 4 phase with the diffraction peaks at 13.1°and 27.5°. These are the (100) and (002) planes matching with the g-C 3 N 4 powder with tri-s-triazine unit (Figure S3, Supporting Information), and the standard JCPDS No.…”

Section: Characterizations Of P-cu 2 O and N-g-c 3 N 4 Composite Filmsmentioning

confidence: 99%

Highly Flexible Tribovoltaic Nanogenerator Based‐on P‐N Junction Interface: Comparative Study on Output Dependency Dominated by Photovoltaic Effect in Freestanding‐Mode

Sriphan,

Worathat,

Pharino

et al. 2023

Adv Funct Materials

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The emergence of tribovoltaic nanogenerators (TVNGs) paves the way for developing a new kind of semiconductor‐based energy harvester that overcomes the restriction of low output current in a conventional approach. The traditional TVNG generally depends on the frictional pair between two rigid semiconductors (or metal‐semiconductor), limiting the practicability of flexible and portable electronics. Recent developments require the fundamental understanding of charge generation in diverse operating modes and structures. Here, a flexible TVNG based on the p‐Cu2O/n‐g‐C3N4 interface is presented. Operating in a freestanding mode, the proposed TVNG can generate a stable signal in any optical conditions including UV illumination, dark, and ambient. Under UV illumination, the electrical outputs of the TVNG reach 0.43 V and 2.1 µA cm−2, which are significantly larger than those obtained from dark and ambient conditions. The results demonstrate the coupling effect of three phenomena: tribovoltaic, photovoltaic, and triboelectric effects, and the unique mechanism to the observed signal is proposed. Additionally, the TVNG shows the practical feasibility of energy harvesting with capacitor charging and charge‐boosting circuits. This study showcases the unique concept with potential for developing a novel flexible nanogenerator in many aspects, including material, structure, and fundamental mechanism.

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Tailoring oxides of copper-Cu2O and CuO nanoparticles and evaluation of organic dyes degradation

Cited by 29 publications

References 19 publications

CuO as efficient photo catalyst for photocatalytic decoloration of wastewater containing Azo dyes

CuO as efficient photo catalyst for photocatalytic decoloration of wastewater containing Azo dyes

Fabrication and Deposition of Copper and Copper Oxide Nanoparticles by Laser Ablation in Open Air

Highly Flexible Tribovoltaic Nanogenerator Based‐on P‐N Junction Interface: Comparative Study on Output Dependency Dominated by Photovoltaic Effect in Freestanding‐Mode

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