E. tirucalli plant latex mediated green combustion synthesis of ZnO nanoparticles: Structure, photoluminescence and photo-catalytic activities

Kumar, K. Suresh; Dhananjaya, N.; Yadav, L.S. Reddy

doi:10.1016/j.jsamd.2018.07.005

Cited by 19 publications

(3 citation statements)

References 25 publications

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“…According to the literature, bands in the range of 400-600 cm −1 indicate the stretching vibration of zinc and oxygen bonds in the ZnO, which can vary depending on the pH of the reaction, as well as the crystalline structure and morphology of ZnO. [54][55][56][57][58][59][60][61][62][63] In this study, bands suggesting the in situ generation of ZnO in NR were difficult to observe in the FTIR spectra, possibly owing to overlap with bands for cis-1,4-polyisoprene. However, a band around 653 cm −1 was observed in the spectra of NR/ZnO and NR/ZnO (no NaOH), whereas it was not detected in that of NR.…”

Section: Resultsmentioning

confidence: 99%

Protein‐Mediated ZnO Synthesis for Self‐Healing in Natural Rubber

Fueangphakdee,

Nimpaiboon,

Junkong

2024

Macro Materials & Eng

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Natural rubber (NR) consists of mainly cis‐1,4‐polyisoprene with proteins as notable nonrubber components that significantly influence its properties. A relatively unexplored aspect is the role of these proteins in reducing and stabilizing metal ions to form metallic particles. Here, the NR/ZnO composite is successfully prepared by in situ generation of ZnO in the NR latex for the first time. With the aid of the proteins, the amount of ZnO is slightly higher than that formed in the saponified NR latex (SPNR), where some proteins are removed. Importantly, the noncovalent bonds between the proteins and/or amino acids with the ZnO formed in the NR latex can provide the self‐healing behavior of the NR/ZnO composite. However, heating at ≈40 °C is still necessary for reducing the healing time and increasing the self‐healing efficiency of the composite. Nevertheless, greater noncovalent bonds within NR/ZnO hinder rubber molecular chain interdiffusion and rearrangement essential for self‐healing behavior in uncross‐linked rubber, resulting in lower healing efficiency compared to SPNR/ZnO. This study underscores the significance of proteins and/or amino acids on NR's properties, despite their minor presence. Without sophisticated NR modification, this is a very simple and low‐cost technique to achieve the NR/ZnO composite with self‐healing behavior.

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Section: Resultsmentioning

confidence: 99%

Protein‐Mediated ZnO Synthesis for Self‐Healing in Natural Rubber

Fueangphakdee,

Nimpaiboon,

Junkong

2024

Macro Materials & Eng

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“…Adding Co composites increases the bandgap, as indicated by the Tauc plot. The introduction of Co composites results in an increased concentration of charge carriers, leading to a higher bandgap [41–44]. The minimal energy required for an electron to move from the valence band (VB) to the conducting band (CB) in Co material contributes to the increase in bandgap when NiO nanoparticles are added.…”

Section: Resultsmentioning

confidence: 99%

Enhanced photocatalytic and electrochemical performance of hydrothermally prepared NiO‐doped Co nanocomposites

Venkatachalapathy,

Sambathkumar,

Rajasaravanan

et al. 2024

Luminescence

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In this study, we synthesize nanostructured nickel oxide (NiO) and doped cobalt (Co) by combining nickel(II) chloride hexahydrate (NiCl2.6H2O) and sodium hydroxide (NaOH) as initial substances. We analyzed the characteristics of the product nanostructures, including their structure, optical properties, and magnetic properties, using various techniques such as x‐ray diffraction (XRD), scanning electron microscopy (SEM), ultraviolet absorption spectroscopy (UV–Vis), Fourier transform infrared (FTIR) spectroscopy, and vibrating sample magnetometers (VSM). The NiO nanoparticles doped with Co showed photocatalytic activity in degrading methylene blue (MB) dye in aqueous solutions. We calculated the degradation efficiencies by analyzing the UV–Vis absorption spectra at the dye's absorption wavelength of 664 nm. It was observed that the NiO‐doped Co nanoparticles facilitated enhanced recombination and migration of active elements, which led to more effective degradation of organic dyes during photocatalysis. We also assessed the electrochemical properties of the materials using cyclic voltammetry (CV) and impedance spectroscopy in a 1 mol% NaOH solution. The NiO‐modified electrode exhibited poor voltammogram performance due to insufficient contact between nanoparticles and the electrolyte solution. In contrast, the uncapped NiO's oxidation and reduction cyclic voltammograms displayed redox peaks at 0.36 and 0.30 V, respectively.

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“…(Agarwal et al, 2017;Rajeshkumar and Bharath, 2017). The method involves the formation of nanoparticles which are harmless, environmentally friendly, biocompatible and cost-effective (SudheerKumar et al, 2018;Menon et al, 2017). The commonly synthesised nanoparticles using this method are gold (Au), silver (Ag), copper oxide (CuO), and zinc oxide (ZnO) nanoparticles (Singh et al, 2018a;Santhoshkumar et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Free Radical Scavenging Activity of Fruit Formulation Mediated Zinc Oxide Nanoparticles

L¹,

Hannah²,

Rajeshkumar³

2020

ijrps

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To determine the free radical scavenging activity of fruit formulation mediated zinc oxide nanoparticle. Zinc oxide nanoparticles are widely known for their antimicrobial agent, anti-diabetic, anti-inflammatory, wound healing, antioxidant and optic properties. Oxidative degradation of lipids, proteins, food and cosmetics involves a radical-chain reaction with release of free radicals. These free radicals are extremely reactive and can even attack relatively stable molecules like the DNA bases. With a recent rise in diseases associated with increased oxidative stress, a good antioxidant seems to be the need of the hour. Synthesis of zinc oxide nanoparticles using Punica granatum and Elettaria cardamomum extract. Characterisation of the nanoparticles using UV–Visible spectroscopy and Scanning electron microscope. It is followed by the DPPH radical scavenging assay to determine the antioxidant activity. With an increase in the concentration of zinc oxide nanoparticles, there was an increase in the percentage of inhibition. When compared to the standard, the zinc oxide nanoparticles showed increased antioxidant activity even in small concentrations. Punica granatum and Elettaria cardamomum mediated Zinc oxide nanoparticles showed considerable antioxidant property even in small quantity when compared with standard vitamin C. Further studies need to be carried out to check for its potency as a prophylactic agent.

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E. tirucalli plant latex mediated green combustion synthesis of ZnO nanoparticles: Structure, photoluminescence and photo-catalytic activities

Cited by 19 publications

References 25 publications

Protein‐Mediated ZnO Synthesis for Self‐Healing in Natural Rubber

Protein‐Mediated ZnO Synthesis for Self‐Healing in Natural Rubber

Enhanced photocatalytic and electrochemical performance of hydrothermally prepared NiO‐doped Co nanocomposites

Free Radical Scavenging Activity of Fruit Formulation Mediated Zinc Oxide Nanoparticles

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