Synthesis and characterization of copper nanoparticles on walnut shell for catalytic reduction and C-C coupling reaction

Zamani, Asghar; Marjani, Ahmad Poursattar; Nikoo, Abbas; Heidarpour, Mojtaba; Dehghan, Ahmad

doi:10.1080/24701556.2018.1503676

Cited by 16 publications

(10 citation statements)

References 21 publications

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“…Three sizes of supported CuNPs were prepared via the mixing of walnut shell and Cu (II) aqueous solution followed by evaporation of water and reduction of copper ions by an ethanolic solution of NaBH 4 . The formation of copper nanoparticles was observed by transmission electron microscopy (TEM) and energy dispersive X-ray spectroscope (EDX) The structure stability of CuNPs was investigated by the thermogravimetric (TGA) under air (supplementary material) (Zamani et al, 2018). TEM image give 15-22 and 60-80 nm particle size for CuNP-WS1, CuNP-WS2 respectively and clear aggregation of nanoparticles and non-supported ones were detected in the case of CuNP-WS3 (supplementary material, Figure 1).…”

Section: Resultsmentioning

confidence: 99%

“…The reduction of Cu 2þ was carried out by the drop-wise addition of 0.25 M ethanol (Merck Millipore) solution of NaBH 4 (30 mL, 70 mL, 140 mL) to the ethanol mixture of obtained solid and intensive stirring was continued for three hours. In the final stage Cu loading on WS was 1.35% (CuNP-WS1), 3.03% (CuNP-WS2) and 8.14% (CuNP-WS3), respectively, based on Atomic Absorption Spectroscopy (AAS) analysis (Zamani et al, 2018).…”

Section: Methodsmentioning

confidence: 99%

“…According to the principles of green chemistry, walnut shellsupported CuNPs were synthesized and investigated in previous studies (Zamani et al, 2018). The present study was set out to investigate the antibacterial and antioxidant effects.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of Cu nanoparticles fixed on cellulosic walnut shell material and investigation of its antibacterial, antioxidant and anticancer effects

Mehdizadeh

Zamani

Froushani

2020

Heliyon

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In this study, antibacterial, antioxidant, and anticancer effects of Cu nanoparticles (CuNPs) fixed on cellulosic walnut shell material were investigated. Firstly, three types of walnut shell-supported copper nanoparticles with various sizes (CuNP-WS1 15-22 nm, CuNP-WS2 60-80 nm and, CuNP-WS3 aggregated of metallic nanoparticles) were synthesized. Antibacterial properties of CuNPs were studied on three strains of bacteria; Staphylococcus aureus, Escherichia coli, and Listeria monocytogenes. DPPH (1, 1-Diphenyl-2-picrylhydrazyl) method was used to examining antioxidant properties. Cytotoxic effects of the synthesized nanoparticles on the cancer cell line were studied. Antimicrobial properties of CuNPs showed that these nanomaterials affect both Gram-positive and Gramnegative bacteria. The antioxidant properties of CuNPs increased significantly by increasing the concentration to 10%. CuNPs appeared to have a dose-dependent cytotoxic effect on K562 cells. However, the IC50 of the synthesized nanoparticles against the K562 (25.24 AE 5 μg/mL) cancer cells was lower significantly (P < 0.01) of the IC50 of these compounds against PBMCs (42.54 AE 6.2 μg/mL).

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Preparation of Cu nanoparticles fixed on cellulosic walnut shell material and investigation of its antibacterial, antioxidant and anticancer effects

Mehdizadeh

Zamani

Froushani

2020

Heliyon

Self Cite

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“…This copper nanocomposite was employed in the synthesis of propargylamines via the three-component reaction between benzaldehydes, secondary cyclic amines and phenyl acetylene (Scheme 5). Also, walnut shell-stabilized copper nanoparticles were found to be an efficient, inexpensive, easy to prepare, green and reusable catalyst in the reduction of aromatic nitro and nitrile compounds to their corresponding amines with NaBH 4 at 35°C in an aqueous medium (Scheme 6) [48]. We continued our studies on the application of this nanocomposite in the classic Ullman reaction to synthesize biaryl (Scheme 7) [48].…”

Section: Walnut Shellmentioning

confidence: 98%

“…Also, walnut shell-stabilized copper nanoparticles were found to be an efficient, inexpensive, easy to prepare, green and reusable catalyst in the reduction of aromatic nitro and nitrile compounds to their corresponding amines with NaBH 4 at 35°C in an aqueous medium (Scheme 6) [48]. We continued our studies on the application of this nanocomposite in the classic Ullman reaction to synthesize biaryl (Scheme 7) [48]. Also a sizedependence study showed that the catalytic efficiency of larger Cu nanoparticles was much lower than that of smaller ones under similar reaction conditions.…”

Section: Walnut Shellmentioning

confidence: 99%

Agricultural waste biomass-assisted nanostructures: Synthesis and application

Zamani

Marjani

Mousavi

2019

Green Processing and Synthesis

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Metal oxide nanoporous materials and nanoparticles have main potential uses in several different fields such as nanoelectronics, biomedical science, renewable solar energy, drug-gene delivery, thermal insulation, and so on. On the other hand, it is vital for scientists to understand that agricultural waste biomass-assisted synthesis is less costly, environmentally friendly and renewable strategy, and therefore, agricultural wastes are ideal renewable resources for production of nanostructures as a substitute for toxic chemicals. This present review includes significant recent improvements concerning the synthesis of agricultural waste biomass-assisted metal oxide nanostructures and their application. The goal is to provide a vision for the use of non-extracted agricultural waste, especially lignocellulosic biomass an inexpensive, green, differentiated resource and policy for the synthesis of valuable nanoporous materials and nanoparticles.

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An efficient and sustainable Pd‐nanomagnetic heterogeneous catalyst for the reduction of nitroarene and environmental pollutant

Yadav¹,

Chavan²

2023

Applied Organom Chemis

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This study reports the synthesis and characterization of an environmentally friendly, cost‐effective, and sustainable Pd‐heterogeneous catalyst anchored on superparamagnetic silica‐coated iron oxide. The synthesized Pd‐SB/MNP nanomagnetic catalyst was extensively characterized using Fourier transform infrared (FTIR), inductively coupled plasma optical emission spectroscopy (ICP‐OES), X‐ray photoelectron spectroscopy (XPS), X‐ray diffraction (XRD), energy‐dispersive spectrometry (EDS), vibrating sample magnetometry (VSM), field emission scanning electron microscopy (FE‐SEM), thermogravimetric analysis (TGA), Brunauer–Emmett–Teller (BET), and high‐resolution transmission electron microscopy (HR‐TEM). The Pd‐SB/MNP catalyst showed remarkable efficiency in catalyzing the reduction of nitroarene and Cr(VI) under mild reaction conditions using an eco‐friendly solvent. The catalyst exhibits facile recovery through external magnetization, enabling its efficient recycling and reutilization for at least 10 cycles while demonstrating minimal Pd loss, as confirmed by rigorous hot filtration testing and ICP‐OES analysis. These results comply with the industry's prescribed thresholds for permissible levels of residual metallic content. The results suggest that the synthesized Pd‐SB/MNP catalyst holds great potential for various industrial applications.

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Synthesis and characterization of copper nanoparticles on walnut shell for catalytic reduction and C-C coupling reaction

Cited by 16 publications

References 21 publications

Preparation of Cu nanoparticles fixed on cellulosic walnut shell material and investigation of its antibacterial, antioxidant and anticancer effects

Preparation of Cu nanoparticles fixed on cellulosic walnut shell material and investigation of its antibacterial, antioxidant and anticancer effects

Agricultural waste biomass-assisted nanostructures: Synthesis and application

An efficient and sustainable Pd‐nanomagnetic heterogeneous catalyst for the reduction of nitroarene and environmental pollutant

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