Surfactant assisted solvothermal synthesis of ZnO nanoparticles and study of their antimicrobial and antioxidant properties

Zare, Mina; Namratha, K.; Byrappa, K.; Surendra, D.M.; Yallappa, S.; Hungund, Basavaraj S.

doi:10.1016/j.jmst.2017.09.014

Cited by 119 publications

(49 citation statements)

References 45 publications

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“…This response may explain the large accumulation of these compounds in fruits from plants exposed to ZnO NPs [89], and it could be the main reason for the observed higher antioxidant activities [90]. A study conducted by Zare et al [91] showed that synthesized ZnO NPs had higher antioxidant activity (ABTS and DPPH) compared to ZnO microparticles. The biological and antioxidant effectiveness of ZnO NPs depends on particle size and shape [12].…”

Section: Resultsmentioning

confidence: 99%

Foliar Application of Zinc Oxide Nanoparticles and Zinc Sulfate Boosts the Content of Bioactive Compounds in Habanero Peppers

García-López

Niño-Medina

Olivares‐Sáenz

et al. 2019

Plants

131

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The physiological responses of habanero pepper plants (Capsicum chinense Jacq.) to foliar applications of zinc sulphate and zinc nano-fertilizer were evaluated in greenhouse trials. The effect of the supplement on fruit quality of habanero pepper was particularly observed. Habanero pepper plants were grown to maturity, and during the main stages of phenological development, they were treated with foliar applications of Zn at concentrations of 1000 and 2000 mg L−1 in the form of zinc sulfate (ZnSO4) and zinc oxide nanoparticles (ZnO NPs). Additional Zn was not supplied to the control treatment plants. ZnO NPs at a concentration of 1000 mg L−1 positively affected plant height, stem diameter, and chlorophyll content, and increased fruit yield and biomass accumulation compared to control and ZnSO4 treatments. ZnO NPs at 2000 mg L−1 negatively affected plant growth but significantly increased fruit quality, capsaicin content by 19.3%, dihydrocapsaicin by 10.9%, and Scoville Heat Units by 16.4%. In addition, at 2000 ZnO NPs mg L−1 also increased content of total phenols and total flavonoids (soluble + bound) in fruits (14.50% and 26.9%, respectively), which resulted in higher antioxidant capacity in ABTS (2,2′azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)), DPPH (2,2-diphenyl-1-picrylhydrazyl), and FRAP (ferric reducing antioxidant power) (15.4%, 31.8%, and 20.5%, respectively). These results indicate that application of ZnO NPs could be employed in habanero pepper production to improve yield, quality, and nutraceutical properties of fruits.

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Section: Resultsmentioning

confidence: 99%

Foliar Application of Zinc Oxide Nanoparticles and Zinc Sulfate Boosts the Content of Bioactive Compounds in Habanero Peppers

García-López

Niño-Medina

Olivares‐Sáenz

et al. 2019

Plants

131

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“…vulgaris leaf extract at 1041 is due to to C–N stretching in primary amine 39 . The small peak at 1615 cm −1 is ascribed to the O–H bending mode due to adsorption of water molecules 40 . T .…”

Section: Resultsmentioning

confidence: 99%

“…An antioxidant is a substance that protects cells against the damaging influence of Reactive oxygen species (ROS) 49 . The DPPH assay is a quick, simple and sensitive method for the antioxidant screening of nanomaterials 40 . Molecules of antioxidant property possess extensive industrial and biomedical uses.…”

Section: Resultsmentioning

confidence: 99%

Novel Green Biomimetic Approach for Synthesis of ZnO-Ag Nanocomposite; Antimicrobial Activity against Food-borne Pathogen, Biocompatibility and Solar Photocatalysis

Zare

Namratha

Alghamdi

et al. 2019

Sci Rep

Self Cite

152

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A simple, eco-friendly, and biomimetic approach using Thymus vulgaris ( T . vulgaris ) leaf extract was developed for the formation of ZnO-Ag nanocomposites (NCs) without employing any stabilizer and a chemical surfactant. T . vulgaris leaf extract was used for the first time, in a novel approach, for green fabrication of ZnO-Ag NCs as a size based reducing agent via the hydrothermal method in a single step. Presence of phenols in T . vulgaris leaf extract has served as both reducing and capping agents that play a critical role in the production of ZnO-Ag NCs. The effect of silver nitrate concentration in the formation of ZnO-Ag NCs was studied. The in-vitro Antimicrobial activity of NCs displayed high antimicrobial potency on selective gram negative and positive foodborne pathogens. Antioxidant activity of ZnO-Ag NCs was evaluated via (2,2-diphenyl-1-picrylhydrazyl) DPPH method. Photocatalytic performance of ZnO-Ag NCs was appraised by degradation of phenol under natural sunlight, which exhibited efficient photocatalytic activity on phenol. Cytotoxicity of the NCs was evaluated using the haemolysis assay. Results of this study reveal that T . vulgaris leaf extract, containing phytochemicals, possess reducing property for ZnO-Ag NCs fabrication and the obtained ZnO-Ag NCs could be employed effectively for biological applications in food science. Therefore, the present study offers a promising way to achieve high-efficiency photocatalysis based on the hybrid structure of semiconductor/metal.

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“…Over the years, a wide number of physical, chemical and hybrid synthetic strategies have been developed and employed to obtain ZnO NPs. [50][51][52][53][54][55][56][57][58][59] However, these approaches appear to suffer through certain serious setbacks, such as the usage/ emission of highly toxic and hazardous materials, impurities (leading to biological risking), inconsistent yields/size/ morphology, high temperature/pressure conditions, etc. On the other hand, green synthetic procedures, using either plant (extract) or biological species (microorganisms, & enzymes), are gaining importance as they are simple (generally single-step processes), produce clean nanomaterials, inexpensive, safe and eco-friendly.…”

Section: Introductionmentioning

confidence: 99%

Green and low-cost synthesis of zinc oxide nanoparticles and their application in transistor-based carbon monoxide sensing

et al. 2020

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Surfactant assisted solvothermal synthesis of ZnO nanoparticles and study of their antimicrobial and antioxidant properties

Cited by 119 publications

References 45 publications

Foliar Application of Zinc Oxide Nanoparticles and Zinc Sulfate Boosts the Content of Bioactive Compounds in Habanero Peppers

Foliar Application of Zinc Oxide Nanoparticles and Zinc Sulfate Boosts the Content of Bioactive Compounds in Habanero Peppers

Novel Green Biomimetic Approach for Synthesis of ZnO-Ag Nanocomposite; Antimicrobial Activity against Food-borne Pathogen, Biocompatibility and Solar Photocatalysis

Green and low-cost synthesis of zinc oxide nanoparticles and their application in transistor-based carbon monoxide sensing

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