International Journal Of Bio-Inorganic Hybrid Nanomaterials
Volume:10 Issue: 3, Autumn 2021

Graphene oxide is an emanating nanoparticle with diverse applications for energy storage, conversation and industrial wastewater treatment (adsorbent and photocatalysts) due to their outstanding electrical, thermal and chemical attributes.graphene oxide-based nanocomposites a hot area of investigation in the past decade because of their considerable mechanical, electrical, thermal, and barrier properties. Magnetic graphene oxide nanocomposites were prepared via a facile co-precipitation and hydrothermal methods and characterized by X-ray powder diffraction (XRD), Transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM) and techniques and Bruner-Emmett-Teller (BET). The nanoparticles were found to have a size of 20-60 nm and were spread out on the graphene oxide nanosheets. Magnetic studies demonstrated that graphene oxide nanocomposites can be easily separated from the solution by an external magnetic field. The photocatalytic degradation of Congo red dye (CR) was evaluated based on the removal of Congo red (CR) in aqueous solution under visible light irradiation. The photocatalytic activity was affected by the structural and optical properties as well as the surface area of the samples. Compared with pure nanocomposites, the MnFe2O4@ZnO-GO nanocomposite compare to ZnFe2O4@MnO-GO nanocomposite displayed a high photocatalytic activity on the photodegradation of Congo red. The prepared graphene oxide nanocomposite can be potentially applied as a visible-light responsive catalyst and magnetically separable photocatalyst.

Magnesium oxide nanoparticles are characterized with a wide variety of applications and are massproduced throughout the world. However, questions remain regarding their safety. In this study, the hepatoprotective effects of fig and olive hydroethanolic extract in Quranic ratios of 1: 7 in the prevention of thioacetamide-induced liver damage in male Syrian mice were investigated. In addition, hematology, biochemistry, and histopathology of the rats are examined at various concentrations (75,150,300 mg / kg) over 28-days period. In this experimental study, 36 male rats were divided into 6 groups of 6. Control without any drug treatment, the control group treated with thioacetamide 100 mg / kg, the third group treated with 300 mg / kg metformin, and groups 4, 5 and 6 with coated concentrations of 75,150,300 mg / kg, were gavaged every other day for 28 days. At the end of the experiment and the mean activity of ALT, AST and ALP enzymes was compared with the control group. The results of one-way analysis of variance (ANOVA) showed a significant increase in serum SGOT level in thioacetamide + metformin and thiostamide groups compared to other groups (P <0.001). Thioacetamide + metformin and thioacetamide were seen compared to other groups (P <0.001). A significant increase in ALP enzyme activity was observed in all groups compared to the control group receiving 150mg / kg coated nanoparticles (P <0.01). The combination of hydroathanolic extract of fig and olive fruit with Quranic ratios may modulate liver enzymes.

In the past, cold plasma is used for sterilization of sensitive materials and now it is extended to food industries as a novel technology. For years cold plasma processing has been viewed as useful for microbial inactivation while maintaining quality of fresh produce. However, this process is not effective for in vitro model food systems for inactivation of microbes or enzymes which are present in intact tissues, as it is a surface phenomenon. Cold plasma technology is also used to inactivate endogenous enzymes which are responsible for browning reactions particularly polyphenoloxidase and peroxidases. Several research investigations showed a reduced growth of microorganism via different mode of actions by etching phenomenon, cell disruption by electrophoration etc. Plasma technology is considered as modern non conventional technique which is used for the preparation of modified Oyster mushroom, altering its physical and chemical properties. Overall application of cold plasma for microbial destruction on different food substrates Oyster mushroom. was discussed. Besides this, it is also used to alter the germination rate of seeds. It is an eco-friendly process which is used in the preservation of food and other potential applications as an alternative to common techniques.

A simple method has been developed for the preconcentration of chromium (VI) based on the adsorption of its modified by2-aminopyridine/graphene oxide nano-plates.A novel and selective method has been developed for the fast determination of trace amounts of chromium (VI) ions in water samples .The procedure is based on the selective formation of chromium (VI) ions using modified 2-aminopyridine/graphene oxide nano-plates at different pH values followed by elution with organic eluents and determination by atomic absorption spectrometry The preconcentration factor was 20. The limit of detection of the proposed method is 9.7 ng mL-1. The maximum sorption capacity of the sorbent under the optimum conditions has been found to be 5mg of chromium (VI) per gram of sorbent. The relative standard deviation under the optimum conditions was 2.5% (n = 10). Accuracy and application of the method was estimated by using the test samples of natural and synthetic water spiked with different amounts of chromium (VI) ion.

In this research, the contributions of effective factors on the structural and conformational properties of the halogenated derivatives of Vinyl azides and Vinyl isocyanates, Formyl azides, and Formyl isocyanates have been investigated using the methods of initial quantum mechanics computations. For this purpose, the quantum method of LC-ωPBE/ with 6-311+G** basis set has been used on the conformational behavior of halogenated derivatives of Vinyl azides and Vinyl isocyanates including Fluoro vinyl azide (compound 1), Chloro vinyl azide (compound 2), Bromo vinyl azide (compound 3), Fluoro vinyl isocyanate (compound 4), Chloro vinyl isocyanate (compound 5), and Bromo vinyl isocyanate (compound 6). Also, quantum computations methods were studied on the Formyl azide (compound 7) and Formyl isocyanate (compound 8). The following parameters were examined in this study: compounds stability, enthalpy, entropy, Gibbs free energy, calculated energy between cis and trans-forms, structural parameters and conformational behavior of compounds. Obtained results indicated that trans-form is the more stable form between cis and trans-forms of compounds 1 to 6 and also, the cis-forms are more stable between two compounds, 7 and 8. The stability of cis or trans-forms of compounds 1 to 8 was analyzed using the evaluation of factors and effects mentioned above.

Volatile organic compounds (VOCs) have attracted worldwide attention due to their serious risks to the environment and human health. Industrial processes such as the combustion of fossil fuels, petrochemicals, dyes, coatings, pesticides, and plastics all contribute to the emission of VOCs. Degradation methods (catalytic oxidation and biofiltration) and recovery methods (adsorption, compaction, and membrane separation) have been developed to remove VOCs. Adsorption has been established as one of the most promising strategies to reduce VOCs due to its cost-effective properties, simplicity, and low energy consumption. Prominent advances in the adsorption of VOCs by various types of porous materials (such as carbon-based materials, oxygen-containing materials, organic polymers, and composites) have been carefully summarized in this study. This study aims to provide a comprehensive understanding of the mechanisms of VOCs adsorption for different porous materials.