A green method for the synthesis of Copper Nanoparticles using L-ascorbic acid

Umer, Asim; Naveed, Shahid; Ramzan, Naveed; Rafique, Muhammad; Imran, Muhammad

doi:10.1590/s1517-70762014000300002

Cited by 113 publications

(65 citation statements)

References 23 publications

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“…In this Figure, sharp and strong peaks at 2θ = 21.0, 26.8, 28.7 and 55° are several characteristic peaks of the matrix of zirconium silicate . The observed XRD peaks at 50.1° and 68.2° are assigned to (200) and (220) planes of the face‐centered cubic ( fcc ) Cu crystals, respectively, which are in a good agreement with the reported XRD pattern of Cu NPs (JCPDS No.04–0836) …”

Section: Resultssupporting

confidence: 86%

Green synthesis of Cu/zirconium silicate nanocomposite by using Rubia tinctorum leaf extract and its application in the preparation of N‐benzyl‐N‐arylcyanamides

Nasrollahzadeh

Sajjadi

Sajadi

2018

Applied Organom Chemis

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A simple and convenient protocol was established for the synthesis of the N‐benzyl‐N‐arylcyanamides through N‐benzylation of a wide variety of arylcyanamides using copper nanoparticles immobilized on natural zirconium silicate as a novel and green heterogeneous catalyst. In this study, we showed a novel, cost efficient, convenient and simple method for green synthesis of Cu/zirconium silicate nanocomposite by using Rubia tinctorum leaf extract as capping and reducing agent. The structure of the novel catalyst was successfully characterized using a number of micro/spectroscopic techniques such as XRD, FESEM, BET, EDS, TEM, FT‐IR and elemental mapping. TEM micrographs of obtaining biocatalyst revealed mostly spherical particles with an average diameter of about 15–25 nm on the surface of natural support. The prepared catalyst was used in the N‐benzylation of a variety of arylcyanamides with benzyl bromide and showed high activity and stability for the efficient synthesis of N‐benzylarylcyanamides in good yields. Remarkably, the catalyst can be easily recovered from the reaction medium and reused up to five runs without losing its catalytic activity.

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Section: Resultssupporting

confidence: 86%

Green synthesis of Cu/zirconium silicate nanocomposite by using Rubia tinctorum leaf extract and its application in the preparation of N‐benzyl‐N‐arylcyanamides

Nasrollahzadeh

Sajjadi

Sajadi

2018

Applied Organom Chemis

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“…Chitosan has strong affinity toward metal ions due to the presence of many amine and hydroxyl groups, and thus leading to Chi-CuO nanocomposite formation [25]. Ascorbic acid act as a reducing and capping agent to impart stability to the nanocomposite [26]. The antimicrobial property of metal/polymer nanocomposites may be due to the adsorption of bacteria and causes disruption of the membrane [27].…”

Section: Anti-microbial Activitymentioning

confidence: 99%

Preparation and characterization of ascorbic acid-mediated chitosan–copper oxide nanocomposite for anti-microbial, sporicidal and biofilm-inhibitory activity

Logpriya¹,

Bhuvaneshwari²,

Vaidehi³

et al. 2018

J Nanostruct Chem

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The chitosan-copper oxide (Chi-CuO) biopolymer nanocomposites were synthesized by a simple green chemistry method using ascorbic acid as a reducing and capping agent. The intense peak around 300 nm was observed in the UV-visible spectrum indicating the formation of CuO nanoparticles. The prepared Chi-CuO nanocomposites were characterized using energy-dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), X-ray diffraction spectroscopy (XRD), and Fourier transform-infrared spectroscopy (FT-IR). SEM and XRD pattern showed cubic shape for Chi-CuO nanocomposites with average crystalline size of 17 nm, as calculated using Debye-Scherrer's formula. The FT-IR spectral studies showed the Cu-O bond formation with chitosan to form nanocomposites. Synthesized nanocomposites showed significant anti-microbial activity against Bacillus subtilis, Pseudomonas aeruginosa, Escherichia coli and Penicillium notatum, assayed using the agar well diffusion method. It also showed sporicidal activity against B. subtilis and exhibited effective biofilminhibitory activity against B. subtilis (69%/100 μg/mL) and P. aeruginosa (63%/100 μg/mL).

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“…The spectrum of synthesized chitosan/ZnO nanoparticles present a acute band below 600 cm -1 which related to the stretching vibration of Zn-O bond and broad peak between 3341 and 2912 cm -1 associated to the vibration of O-H bond of the chemosorbed water. Besides that, the absorption bands centered at about 1981, 1640, 1556, and 1375 cm -1 that exist on all the cases of FTIR spectrums can be designated to the O-H stretching vibrations, CO2 mode, and asymmetric and symmetric C=O stretching modes, respectively [26]. As mentioned by Pandiselvi & Thambidurai [27], a broad absorption peak for the vibration of the O-Zn-O group was in the range of 580 to 400 cm -1 .…”

Section: Ftir Analysismentioning

confidence: 79%

Synthesis of Chitosan/Zinc Oxide Nanoparticles Stabilized by Chitosan via Microwave Heating

Yusof

Zain

Pauzi

2019

Bull. Chem. React. Eng. Catal.

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Nowadays, zinc oxide (ZnO) has attracted attention in research and development because of its remarkable antibacterial properties. Chitosan/ZnO nanoparticles were successfully synthesized via microwave heating. The objectives of this work were to investigate the effect of stabilizer, power heating and time heating on size of chitosan/ZnO nanoparticles and to determine antibacterial activity against pathogenic bacteria, where chitosan was used as a stabilizing agent. Chitosan/ZnO nanoparticles were analyzed by Fourier Transform Infra Red (FTIR), X-ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), and Zetasizer instrument. The power heating and time heating were varied from 400 to 800 Watt and 4 to 8 minutes, respectively. The presence of chitosan has role on preventing the nanoparticles from agglomeration by producing a milky solution of chitosan/ZnO nanoparticles without any suspensions. The increase of power and time heating improved the size of nanoparticles. The peak in FTIR spectrum at around 427 cm -1 was confirmed the existence of the ZnO phase. XRD patterns showed that the chitosan/ZnO nanoparticles materials were pure phase with average crystalline size is 130 nm. FESEM revealed that chitosan/ZnO nanoparticles were uniformly distributed with the mean value of size is 70 nm and spherical shaped. Further impact of power and time heating on the size of the chitosan/ZnO nanoparticles can be shown by a nanoparticles size distribution with the average of 30 to 90 nm. The results showed that chitosan/ZnO nanoparticles have displayed an antibacterial inhibition zone against Gram-positive S. aureus and Gram-negative E. coli which 16.0 and 13.3 mm, respectively. Chitosan/ZnO nanoparticles were synthesized in this work presented have potential application to prevent bacterial infections.

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A green method for the synthesis of Copper Nanoparticles using L-ascorbic acid

Cited by 113 publications

References 23 publications

Green synthesis of Cu/zirconium silicate nanocomposite by using Rubia tinctorum leaf extract and its application in the preparation of N‐benzyl‐N‐arylcyanamides

Green synthesis of Cu/zirconium silicate nanocomposite by using Rubia tinctorum leaf extract and its application in the preparation of N‐benzyl‐N‐arylcyanamides

Preparation and characterization of ascorbic acid-mediated chitosan–copper oxide nanocomposite for anti-microbial, sporicidal and biofilm-inhibitory activity

Synthesis of Chitosan/Zinc Oxide Nanoparticles Stabilized by Chitosan via Microwave Heating

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