A novel combustion method to prepare CuO nanorods and its antimicrobial and photocatalytic activities

Christy, A. Jegatha; Nehru, L.C.; Umadevi, M.

doi:10.1016/j.powtec.2012.11.045

Cited by 54 publications

(32 citation statements)

References 9 publications

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“…The main peaks at 35.6° and 38.7° are correspond to (11-1) and (111) crystal planes of CuO, which is coincident with the HRTEM results. The average particle size of CuO nanoparticles was calculated by using the Debye-Scherrer formula [25].…”

Section: Morphological and Structural Characteristicsmentioning

confidence: 99%

Studies on Sensing Properties and Mechanism of CuO Nanoparticles to H2S Gas

Peng

Sun

et al. 2020

Nanomaterials

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In this work, the high crystalline copper oxide (CuO) nanoparticles were fabricated by a hydrothermal method, and their structural properties were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The sensing results show that CuO nanoparticles exhibit enhanced sensitivity and good selectivity for hydrogen sulfide (H2S) gas at a low temperature. There are two working mechanisms involved in the H2S sensing based on CuO nanoparticle sensors. They are the H2S oxidation mechanism and the copper sulphide (CuS) formation mechanism, respectively. The two sensing mechanisms collectively enhance the sensor’s response in the H2S sensing process. The Cu–S bonding is stable and cannot break spontaneously at a low temperature. Therefore, the CuS formation inhibits the sensor’s recovery process. Such inhibition gradually enhances as the gas concentration increases from 0.2 ppm to 5 ppm, and it becomes weaker as the operating temperature rises from 40 °C to 250 °C. The XPS results confirmed the CuS formation phenomenon, and the micro Raman spectra demonstrated that the formation of CuS bonding and its decomposition can be effectively triggered by a thermal effect. Gas-sensing mechanism analysis supplied abundant cognition for the H2S sensing phenomena based on CuO materials.

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Section: Morphological and Structural Characteristicsmentioning

confidence: 99%

Studies on Sensing Properties and Mechanism of CuO Nanoparticles to H2S Gas

Peng

Sun

et al. 2020

Nanomaterials

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“…Oxalic acid (C 2 H 2 O 4 ) is a commercially obtainable economical fuel that will produce a nominal volume of gases in combustion synthesis. There are some reports on the combustion synthesis of the CuO phase using fuels like glycine [41,43], citric acid [46], and malic acid [54]. These fuels have shown significance in the CuO phase stabilization and physicochemical properties.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, there are few reports on the synthesis of CuO with the aids of oxalic acid as a reducing agent by adopting different synthesis protocols by tuning various parameters [60][61][62][63][64]. In these reports [60][61][62][63][64], the procedure employed to synthesis the CuO nanoparticles is quite different from the typical solution combustion synthesis method [41,43,46,54].…”

Section: Introductionmentioning

confidence: 99%

Oxalic acid-derived combustion synthesis of multifunctional nanostructured copper oxide materials

et al. 2021

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Combustion-derived synthesis of nanostructured copper oxide (CuO) materials was synthesized by oxalic acid as a fuel, and copper nitrate as an oxidant. The combustion product showed mixed phases of CuO and Cu 2 O. The pure nanocrystalline CuO phase was obtained upon subsequent annealing of the combustion product at 700 °C for 3 h, whereas the planetary ball-milling of the combustion product at 300 rpm for 10 h yielded CuO phase with two weak peaks of Cu 2 O phase. The microstructural and optical properties of CuO nanomaterials were explored by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Fourier transform infrared (FT-IR), near infrared (NIR), and diffused reflectance spectroscopic (DRS) techniques. The annealed powder XRD pattern confirms that it crystallizes in a monoclinic C12/c1 (15) structure with lattice parameters: a = 0.4687( 4), b = 0.3419(3), c = 0.5128(4) nm, and β = 99° 39′ (4) with average crystalline size, D of 30.89 nm. The agglomeration of fine particles is seen for the ball-milled powder, while the annealed powder revealed different particle sizes in the range of 254 ~ 835 nm as evidenced from FESEM images. The NIR reflectance of (~ 45%) CuO powder (annealed) can be used as black pigments in color industries. The annealed CuO powder reveals narrow Raman peaks than ball-milled powder.

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“…A soluble silver salts (either in water or organic solvent) is reduced by any of the reducing agents as citrate, ethyl glycol, glucose, or sodium borohydride [27]. Christy et al [28] prepared Ag NPs by chemical reduction method using N, N -dimethylformamide and PVP under ultrasonic field. In chemical reduction method, the redox potential, temperature, concentration of the reactants and additions, and the solvent properties used are controlling factors in the size and particle distribution as well as the antimicrobial activity of produced nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Assessment of in situ-Prepared Polyvinylpyrrolidone-Silver Nanocomposite for Antimicrobial Applications

et al. 2017

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Polyvinylpyrrolidone (PVP) is employed in several potential applications, relying of its special chemical and physical properties in addition to its low toxicity and biocompatibility. The aim of this work is to prepare polyvinylpyrrolidone-silver (PVP-Ag) nanocomposite with high inhibiting effect on the microbial growth and low cytotoxicity. In situ prepared small stable spherical silver nanoparticles, with narrow range particle size distribution, were obtained by easy, economical and rapid chemical reduction method. Silver ions were reduced to silver nanoparticles using low amount of sodium borohydride (NaBH4) as a strong reducing agent. PVP-Ag nanocomposite was prepared using PVP as a stabilizing and capping agent. Formation of the spherical silver nanoparticles with mean particle size 5 nm was confirmed by ultraviolet-visible spectroscopy, high resolution transmission electron microscopy, and dynamic light scattering. The inhibiting growth effect of the nanocomposite toward Gram-positive bacteria (Staphylococcus aureus), Gram-negative bacteria (Pseudomonas aeruginosa), and yeast fungus (Candida albicans) were studied. The cytotoxicity of the nanocomposite against BJ1 normal skin fibroblast cell line was tested. Results of this work presented perfect antimicrobial activity of the PVP-Ag nanocomposite towards bacteria and fungi with low cytotoxicity, which may lead to promising applications in skin wound healing.

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A novel combustion method to prepare CuO nanorods and its antimicrobial and photocatalytic activities

Cited by 54 publications

References 9 publications

Studies on Sensing Properties and Mechanism of CuO Nanoparticles to H2S Gas

Studies on Sensing Properties and Mechanism of CuO Nanoparticles to H2S Gas

Oxalic acid-derived combustion synthesis of multifunctional nanostructured copper oxide materials

Assessment of in situ-Prepared Polyvinylpyrrolidone-Silver Nanocomposite for Antimicrobial Applications

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