Synthesis of metal oxide nanoparticles (CuO and ZnO NPs) via biological template and their optical sensor applications

Zinc oxide is of significant importance for many industries due to its versatile properties, which have been enhanced with the production of this material in the nanoscale. Recent interest in the preparation of metal oxide nanoparticles using biological approaches has been reported in the literature. This technique known as “green synthesis” is an environmentally benign process than conventional methods like physical and chemical synthesis methods. Zinc oxide nanoparticles (ZnO-NPs) have been successfully obtained by green synthesis using different biological substrates like chitosan. Chitosan is biocompatible, biodegradable polymer having exclusive physical and chemical properties. Chitosan/metal oxide nanocomposite is a promising nanomaterial with enhanced properties for multiple functionalities. Therefore, this review discusses favorable approach in the formation of cross-linked Chitosan/ZnO nanocomposites attracting significant attention in various fields such biomedical due to their unique biodegradable, biocompatible, non-toxic nature. The use of biological sources, fabrication of green synthesized ZnO nanoparticles and its applications is briefly discussed. Overall, this review is a comprehensive study for the synthesis of ZnO-NPs using biological sources counting on their features and applications.

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The Biolog EcoPlate™ Technique for Assessing the Effect of Metal Oxide Nanoparticles on Freshwater Microbial Communities

Nanomaterials ◽

10.3390/nano11071777 ◽

2021 ◽

Vol 11 (7) ◽

pp. 1777

Author(s):

Imre Németh ◽

Szabina Molnár ◽

Emese Vaszita ◽

Mónika Molnár

Keyword(s):

Metal Oxide ◽

Microbial Communities ◽

Functional Diversity ◽

Metal Oxide Nanoparticles ◽

Diversity Indices ◽

Oxide Nanoparticles ◽

Zno Nps ◽

Biolog Ecoplate ◽

Short Term Exposure ◽

Colour Development

The application of Biolog EcoPlate™ for community-level physiological profiling of soils is well documented; however, the functional diversity of aquatic bacterial communities has been hardly studied. The objective of this study was to investigate the applicability of the Biolog EcoPlate™ technique and evaluate comparatively the applied endpoints, for the characterisation of the effects of metal oxide nanoparticles (MONPs) on freshwater microbial communities. Microcosm experiments were run to assess the effect of nano ZnO and nano TiO2 in freshwater at 0.8–100 mg/L concentration range. The average well colour development, substrate average well colour development, substrate richness, Shannon index and evenness, Simpson index, McIntosh index and Gini coefficient were determined to quantify the metabolic capabilities and functional diversity. Comprehensive analysis of the experimental data demonstrated that short-term exposure to TiO2 and ZnO NPs affected the metabolic activity at different extent and through different mechanisms of action. TiO2 NPs displayed lower impact on the metabolic profile showing up to 30% inhibition. However, the inhibitory effect of ZnO NPs reached 99% with clearly concentration-dependent responses. This study demonstrated that the McIntosh and Gini coefficients were well applicable and sensitive diversity indices. The parallel use of general metabolic capabilities and functional diversity indices may improve the output information of the ecological studies on microbial communities.

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Green Synthesis, Characterization & Antibacterial Studies of Silver (Ag) and Zinc Oxide (Zno) Nanoparticles

Journal of Pure and Applied Microbiology ◽

10.22207/jpam.14.3.39 ◽

2020 ◽

Vol 14 (3) ◽

pp. 1999-2008

Author(s):

H. Syed Jahangir ◽

T. Tamil Kumar ◽

M. Mary Concelia ◽

R. Alamelu

Keyword(s):

Zinc Oxide ◽

Metal Oxide ◽

Green Synthesis ◽

Zno Nanoparticles ◽

Size Structure ◽

Metal Oxide Nanoparticles ◽

Chemical Properties ◽

Oxide Nanoparticles ◽

Zno Nps ◽

Leaf Extracts

Green synthesis nanoparticles were considered as an alternative effective resource instead of chemically engineered metal oxide nanoparticles. Using leaf extracts for green synthesis, essential for the reduction and oxidation process of the metals. Phyllanthus niruri (L.) and Aristolochia indica (L.) leaf extracts were used to synthesize yellowish brown coloured silver (Ag) and white coloured zinc oxide (ZnO) nanoparticles. Synthesized green nanoparticles characterized by different spectroscopic analysis (XRD, XPS, FTIR, PL) and TEM. Characterization results confirmed the particles morphology, size, structure and also their optical and photonic properties. Three different concentrations of Ag and ZnO NPs were analysed against three (gram positive) and five (gram negative) bacteria. Increased levels of green synthesized Ag and ZnO NPs showed increased zone of inhibition than amoxicillin (positive control). Our study proved that the green synthesized Ag and ZnO NPs showed similar unique physical and chemical properties with metal oxide nanoparticles but less toxic while their discharge into the ecosystem.

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Development of a Solid-Phase Extraction (SPE) Cartridge Based on Chitosan-Metal Oxide Nanoparticles (Ch-MO NPs) for Extraction of Pesticides from Water and Determination by HPLC

International Journal of Analytical Chemistry ◽

10.1155/2018/3640691 ◽

2018 ◽

Vol 2018 ◽

pp. 1-16 ◽

Cited By ~ 6

Author(s):

Mohamed E. I. Badawy ◽

Mahmoud A. M. El-Nouby ◽

Abd El-Salam M. Marei

Keyword(s):

Metal Oxide ◽

Water Samples ◽

Solid Phase ◽

Metal Oxide Nanoparticles ◽

Infrared Spectrometry ◽

Oxide Nanoparticles ◽

Zno Nps ◽

Cuo Nps ◽

Ft Ir ◽

Agitation Time

The present study aims to prepare two new types of chitosan-metal oxide nanoparticles (Ch-MO NPs), namely, chitosan-copper oxide nanoparticles (Ch-CuO NPs) and chitosan-zinc oxide nanoparticles (Ch-ZnO NPs), using sol-gel precipitation mechanism, and test them new as adsorbent materials for extraction and clean-up of different pesticides from water. The design of core-shell was implemented by metal oxide core with chitosan as a hard shell after crosslinking mechanism by glutaraldehyde and then epichlorohydrin. The characterizations of the prepared nanoparticles were investigated using Fourier transform infrared spectrometry (FT-IR), zeta potential, scanning electron microscopy (SEM), transmission electron microscope (TEM), and X-ray diffraction (XRD). FT-IR confirmed the interaction between chitosan, metal oxide, and crosslinking mechanism. SEM and TEM explained that the nanoparticles have a spherical morphology and nanosize of 93.74 and 97.95 nm for Ch-CuO NPs and Ch-ZnO NPs, respectively. Factorial experimental design was applied to study the effect of pH, concentration of pesticide, agitation time, and temperature on the efficiency of adsorption of pesticides from water samples. The results indicated that optimum conditions were pH of 7, temperature of 25°C, and agitation time of 25 min. The SPE cartridges were then packed with Ch-MO NPs, and seven pesticides of abamectin, diazinon, fenamiphos, imidacloprid, lambda-cyhalothrin, methomyl, and thiophanate-methyl were extracted from water samples and determined by HPLC. The extraction efficiency of Ch-ZnO NPs was higher than Ch-CuO NPs, but both removed a larger amount of most of tested pesticides than the standard ODS cartridge (C18). The results showed that this method achieves rapid and simple extraction in small quantities of adsorbents (Ch-MO NPs) and solvents. In addition, the method is highly sensitive to pesticides and has a high recovery rate.

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Effect of Metal Oxide Nanoparticles on Plant Enzymatic Activities Under Drought

10.21203/rs.3.rs-664294/v1 ◽

2021 ◽

Author(s):

Esfandiar Jahantab ◽

Jalil Farzadmehr ◽

Nikoo Abadi ◽

Habib Yazdanshenas

Keyword(s):

Metal Oxide ◽

Metal Oxide Nanoparticles ◽

Cadmium Oxide ◽

Foliar Spray ◽

Life Forms ◽

Enzymatic Activities ◽

Oxide Nanoparticles ◽

High Concentration ◽

Zno Nps ◽

Plant Life

Abstract The aim of this work was to study the effect of metal oxide nanoparticles (MO NPs) on enzymatic activities (EAs) of two main plant life forms under drought stress (DS). Foliar spray of silver oxide (AgO), iron oxide (FeO), zinc oxide (ZnO) and cadmium oxide (CdO) at levels of 30, 60, 90 and 120 mg.L-1 were used on aerial parts of forb Sanguisorba officinalis L. and grass Agropyron cristatum (L.) Gaertn. under DS levels of 25-100% field capacity (FC). Glutathione reductase (GR), catalase (CAT), peroxidase (POD) and superoxide dismutase (SOD) were measured after two weeks of the experiment. The results indicate that the EAs changes varied depending on the plant life form, levels of DS, type and levels of NPs. Overall, application of 30- 60 mg.L-1 MO NPs under 25-50%FC significantly reduced EAs, especially in forb (P<0.001). Higher concentration of MO NPs significantly increase EAs. A decrease in CAT (20.90%, 18.80%), POD (21.30%, 17.67%) and SOD (23.14%, 16.88%) was observed under levels of 60 mg.l-1 of ZnO NPs under 25-50%FC in forb and grass, respectively. High concentration of CdO NPs (90-120 mg.l-1) caused by increase (max= 24.0%) in EAs in both life forms under 25%FC.

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Synthesis, Characterization and Evaluation of the Antibiofouling Potential of Some Metal and Metal Oxide Nanoparticles

Applied Sciences ◽

10.3390/app10175864 ◽

2020 ◽

Vol 10 (17) ◽

pp. 5864

Author(s):

Lucía Blanco-Covián ◽

José Ramón Campello-García ◽

María Carmen Blanco-López ◽

Manuel Miranda-Martínez

Keyword(s):

Metal Oxide ◽

Metal Oxide Nanoparticles ◽

Experimental Methodology ◽

Hybrid Coatings ◽

Poly Vinyl Alcohol ◽

Oxide Nanoparticles ◽

Hybrid Polymer ◽

Zno Nps ◽

Tio2 Nps ◽

Better Than

This study explores the potential antibiofouling capacity of coatings based on mixes of poly vinyl alcohol (PVA)-glutaraldehyde (GA) incorporating additions of metal and metal oxide nanoparticles (TiO2, ZnO, CuO, AgNPs and Ag-TiO2NPs). Such a kind of hybrid polymer-nanoparticle mix (PVA/GA/ nanoparticles (NPs)) was uniformly applied by spin coating on the surface of a laboratory raceway and tested in freshwater loaded with green algae communities. The results showed PVA/GA was a convenient carrier for the nanoparticles tested. Image analysis of the coatings showed that Ag-TiO2 nanoparticles exhibited a significant improvement of the antibiofouling effect when compared with that of AgNPs and TiO2-NPs. The effect of the Ag-TiO2 NPs loaded coating about four times better than that of ZnO-NPs. A consistent experimental methodology was developed to test the antibiofouling capacity of the coatings and the hybrid coatings developed have demonstrated promising results as environmentally friendly antibiofouling materials.

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Nano ZnO and its Perspective in Anti-Cancer Activities

Mapana Journal of Sciences ◽

10.12723/mjs.41.5 ◽

2017 ◽

Vol 16 (2) ◽

pp. 41-52

Author(s):

N Shobhaa ◽

N Nandab ◽

B M Nagabhushana

Keyword(s):

Zinc Oxide ◽

Metal Oxide ◽

Zinc Oxide Nanoparticles ◽

Metal Oxide Nanoparticles ◽

Nano Particles ◽

Oxide Nanoparticles ◽

Zno Nps ◽

Large Bandwidth ◽

Anti Cancer ◽

Potential Applications

Several methods are used to counter the deadly disease cancer. Zinc oxide nanoparticles (ZnO NPs) is one of the metal oxide nanoparticles which had been used in anti-cancer activities due to its large bandwidth and high exciting binding energy and it has potential applications like antibacterial, antifungal, anti-diabetic, anti-inflammatory, wound healing, antioxidant, optic properties and also which holds promise to treat cancer effectively. Studies have shown that Zinc metal oxide nano particles induce cytotoxicity in cancer cells. The mechanism for antitumor could work through apoptosis or the generation of reactive oxygen species or and necrosis, among other possibilities. This review is on some of the most significant antitumor results obtained with zinc oxide nanoparticles depending on their size, surface morphology, methods of preparation and also cytotoxicity result.

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