Green synthesis of copper oxide (CuO) nanoparticles by Punica granatum peel extract

Siddiqui, Vasi Uddin; Ansari, Afzal; Chauhan, Ruchi; Siddiqi, Weqar Ahmad

doi:10.1016/j.matpr.2020.05.504

Cited by 67 publications

(31 citation statements)

References 24 publications

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“…Due to the hydrogen‐bonding interaction between melamine and phytic acid, the absorption bands situated at 1055 and 1163 cm −1 corresponding to phosphate groups for the MPCSN move to higher values than those of the phytic acid 22 . The absorption band at 3387 cm −1 of MPCSN is indexed to –OH groups, corresponding to 3482 cm −1 for copper acetate 23 . These results demonstrate that supramolecular self‐assembly networks are successfully formed between melamine, phytic acid, and copper ions, which is similar to the results in previous literatures 18,24,25 .…”

Section: Resultsmentioning

confidence: 99%

Synergistic function of N‐P‐Cu containing supermolecular assembly networks in intumescent flame retardant thermoplastic polyurethane

Chen

Yang

Shi

et al. 2021

Polymers for Advanced Techs

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The design of high‐performance compounded flame retardants based on multielement can be of great significance for reducing the flammability of polymer materials. In this article, a new type of N‐P‐Cu containing supermolecular assembly network (MPCSN) flame retardant was prepared and subsequently added into thermoplastic polyurethane elastomer (TPU)/silicon microencapsulated ammonium polyphosphate (SiAPP) composites. The obtained results indicated that a series of TPU/SiAPP/MPCSN composites exhibited strong adhesions with the TPU matrix. Additionally, the thermal and flame retardant performances of TPU composites were markedly improved after the introduction of different proportions of SiAPP to MPCSN. For example, the peak of heat release rate, the total heat release, the peak of smoke production rate, the total smoke release of the TPU composite containing 7.5 wt% SiAPP and 2.5 wt% MPCSN (TPU/SiAPP3/MPCSN1) remarkably decreased by 68.7%, 52.9%, 52.4%, and 49.4%, respectively, besides the highest LOI value (27.5 vol%) and UL‐94 V‐0 rating, compared with those of pure TPU. The improved flame retardance of the TPU/SiAPP3/MPCSN1 composite was due to the explanations: On one hand, a compact intumescent char effectively protected the TPU matrix from heat and oxygen and retarded the gaseous products permeation into the combustion zone; on the other hand, evolved phosphorus‐containing free radicals captured the H• and HO• generated from the TPU material. The synergistic effect of SiAPP and MPCSN resulted in strong flame suppression, accompanied by 10.8% and 37.8% reductions in FIGRA and Av‐EHC, respectively. This article offers a facile approach to fabricate highly effective flame‐retardant TPU composites.

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Section: Resultsmentioning

confidence: 99%

Synergistic function of N‐P‐Cu containing supermolecular assembly networks in intumescent flame retardant thermoplastic polyurethane

Chen

Yang

Shi

et al. 2021

Polymers for Advanced Techs

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“…These results demonstrate that the CuO NPs were free of any impurities. Additionally, the results indicate the successful preparation of the monoclinic CuO NPs using chia seed extract, and the highly crystalline nature of the prepared NPs[21].…”

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confidence: 83%

“…EDX analysis of the synthesized CuO NPs was used to confirm their elemental composition and purity (Figure 3). The copper peaks centered on 1 keV and 8 keV and the oxygen peak centered on 0.5 keV [21], as shown in Figure 3…”

Section: Edx Spectrummentioning

confidence: 93%

“…Then, the solution was centrifuged at 15000 rpm for 20 min. The synthesized CuO NPs were washed several times with double-distilled water and dried for 12 h in the oven at 80 • C. After that, the dried NPs were annealed in a muffle furnace at 300 • C for 3 h [21] to achieve stable CuO NPs. Finally, the synthesized CuO NPs were stored in a glass vial for characterization.…”

Section: Green Synthesis Of the Cuo Npsmentioning

confidence: 99%

“…Such synthetic methods have, however, generated other challenges for scientific communities, as they are time-consuming and expensive; moreover, they also involve the release of toxic reagents into the environment, causing significant pollution [11][12][13][14]. Therefore, to mitigate these issues, researchers have focused on employing alternative eco-friendly approaches, such as the usage of plant extracts or microorganisms, to synthesize MONPs [15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Facial Eco-Friendly Synthesis of Copper Oxide Nanoparticles Using Chia Seeds Extract and Evaluation of Its Electrochemical Activity

Al-Qasmi

2021

Processes

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In the current study, copper oxide nanoparticles (CuO NPs) were synthesized using chia seed extract in a simple, rapid, and eco-friendly manner for the first time. The synthesized CuO NPs were characterized using different analytical techniques. The images of field emission scanning electron microscopy revealed that the CuO NPs were triangular and pyramid in structure, with a mean particle size of 61.5 nm. The absorption peak of the synthesized CuO NPs was measured using ultraviolet-visible spectroscopy and was recorded at a wavelength of 291 nm. The results of energy-dispersive X-ray analysis confirmed that the CuO NPs synthesized using chia seed extract yielded high-purity CuO NPs. Moreover, the X-ray diffraction analysis indicated the highly crystalline nature of the CuO NPs, and the X-ray photoelectron spectroscopy results indicated that the CuO NPs were prepared successfully. Additionally, electrochemical impedance spectroscopy measurements revealed excellent electrocatalytic conductivity and fast electron transfer at the electrode/electrolyte interface of the synthesized CuO NP-modified glassy carbon electrode.

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Potential application of supercritical extract of pomegranate peel as bio‐antioxidant for biodiesel

Witt

Johann

Triques

et al. 2021

Env Prog and Sustain Energy

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The performance of the pomegranate peel extract against the synthetic antioxidant additives on the oxidation stability of commercial biodiesel B100 derived from soybean was evaluated. The experimental extraction was conducted under 200 bar, 35, 45, and 55 C, and 0.0, 2.5, and 5.0 mL of ethanol as co-solvent. Due to the rich in squalene and α-tocopherol composition, all extracts presented high antioxidant capacity, 16.70 to 1.68 μg mL À1 . In the oxidation stability tests, the addition of 1000 ppm of the supercritical extracts of pomegranate peel to biodiesel resulted in the increment of the induction time of pure biodiesel by up to 1.83. In contrast, the biodiesel added at 1000 ppm with commercial antioxidants increased the times up to 1.58 and 1.79, respectively for butylated hydroxyanisole and butylated hydroxytoluene. Biodiesel added with supercritical extract of pomegranate peel, obtained under 35 C and with 5.0 mL of ethanol, presented higher efficiency in the prevention of the oxidative process and was in accordance with norm European Standard EN 14214. The findings revealed that the extract is a promising natural antioxidant for biodiesel, that, besides being eco-friendly, is an additive that can substitute commercial synthetic antioxidants, extending biodiesel stability.

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Green synthesis of copper oxide (CuO) nanoparticles by Punica granatum peel extract

Cited by 67 publications

References 24 publications

Synergistic function of N‐P‐Cu containing supermolecular assembly networks in intumescent flame retardant thermoplastic polyurethane

Synergistic function of N‐P‐Cu containing supermolecular assembly networks in intumescent flame retardant thermoplastic polyurethane

Facial Eco-Friendly Synthesis of Copper Oxide Nanoparticles Using Chia Seeds Extract and Evaluation of Its Electrochemical Activity

Potential application of supercritical extract of pomegranate peel as bio‐antioxidant for biodiesel

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