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A simple, green method is described for the synthesis of Silver (Ag) nanoparticles (NPs) from the peel extract of Pistachio. The synthesized particles were characterized using UV‐Vis, FT‐IR spectroscopy, XRD, EDAX, FESEM, and TEM images. The effect of pH of the reaction, time, temperature, and amount of Pistachio peel on the synthesis of AgNPs was evaluated. Unlike other biological methods for NPs synthesis, the uniqueness of our method lies in its appropriate synthesis rates and the ability to tune the nanoparticle size via the used extract in the experiment. AgNPs were used as a heterogeneous photocatalyst for the degradation of eosin Y under visible light. Also, the reduction of 4‐nitrophenol to 4‐aminophenol by AgNPs was investigated and after 15 min this reaction was completed. These results demonstrate a very efficient, cost‐effective, and benign method in the field of synthesis of nanoparticles and catalysis technology development. [ABSTRACT FROM AUTHOR]

A novel bio‐nanocomposite was developed by incorporating the extracted nanochitosan from shrimp wastes with Schiff base cobalt complex (Chit–Co complex). The phytosynthesis of Chit–Co complex/Ag bio‐nanocomposite was designed utilizing Chit–Co complex at the presence of Ferulago angulate extraction and characterized by AFM, SEM, EDAX, TEM, FT‐IR, and elemental analysis. The radioprotective application of this bio‐nanocomposite on human lymphocyte cells was evaluated using micronucleus (MN) assay. Total antioxidant activities of it were evaluated using FRAP and DPPH assays. Chit–Co complex/Ag bio‐nanocomposite significantly decreased the frequency of micronuclei in human lymphocytes exposed to ionization irradiation (IR). The highest protection was observed at 200 μg/ml. Also, maximum antioxidant activities of bio‐nanocomposite were provided at the same dose. These data exhibit the radioprotective effect of a bio‐nanocomposite based on wastes of living organisms can be an excellent radioprotective agent, which can protect the normal cells of human against the genetic damage by IR. [ABSTRACT FROM AUTHOR]

In this study, a novel nano‐biocomposite, polyvinylalcohol/Mn3O4/water‐soluble copper complex (PVA/Mn3O4/CuWSC), was produced from Amaranthus spinosus. By combining water‐soluble copper nanocomplex and Mn3O4 nanoparticles along with polyvinyl alcohols and extracts of this plant, this bio nanomaterial was prepared via electrospinning process. This nanohybrid was characterized using transmission electron microscopy, scanning electron microscopy, atomic force microscopy, Fourier‐transform infrared spectroscopy, X‐ray diffraction, energy‐dispersive X‐ray spectroscopy, and elemental analysis. Based on its catalytic activities, it is considered a heterogeneous catalyst and is used for the oxidation of alcohols in industrial reactions. It can oxidize the primary and secondary alcohols to corresponding aldehyde and ketone products with high yield and excellent selectivity using H2O2 under solvent‐free conditions. The recyclability and reusability of PVA/Mn3O4/CuWSC show that it can be a promising catalyst for clean industrial catalytic applications. [ABSTRACT FROM AUTHOR]

A novel, magnetically recoverable porphyrin catalyst has been prepared by the coordinative anchoring of the [Mn(Br2TPP)OAc] complex on silica-coated magnetic nanoparticles (Fe3O4@SiO2, SMNP) through an amine functionality. The heterogeneous catalyst was characterized by powder X-ray diffraction, transmision electron microscopy, scanning electron microscopy, and FTIR spectroscopy. The catalyst loading on the magnetic support was determined by thermogravimetric (TG) analysis and inductively coupled plasma atomic emission spectroscopy. The catalyst nanoparticles were estimated to have a diameter of less than 10 nm. The TG curve demonstrated that the nanocatalyst was thermally stable up to almost 350 °C, exhibiting high thermostability. The epoxidation of olefins and the oxidation of saturated hydrocarbons to the corresponding ketones as well as sulfides to sulfones in an aqueous solution of tetra- n-butylammonium peroxomonosulfate ( n-Bu4NHSO5, TBAOX) were efficiently enhanced with excellent selectivity under the influence of the magnetically separable catalyst. Sulfoxides could also be selectively produced in a mixture of water and ethanol, which makes the title methodology a good alternative for both sulfoxide and sulfone production. The separation and recycling of the catalyst and the byproduct of the oxidant were simple, effective, and economic in this clean oxidation method. FTIR and leaching experiments after seven successive cycles showed that the catalyst was very strongly anchored to the SMNP support. [ABSTRACT FROM AUTHOR]

We report a simple and facile self‐assembly method for the successful fabrication of a biological macromolecule, MnTPPCl (manganese(III) chloride 5,10,15,20‐tetraphenylporphyrin), intercalated into gold nanoparticles using the cooperative effects of Sesbania sesban plant. This biohybrid was characterized using various techniques for further investigation. The catalytic activity of this biological hybrid was considered in the production of aldehydes and ketones from primary and secondary alcohols, respectively. Excellent conversions and selectivties were obtained applying Au@MnTPPCl colloidal nanocomposite and NaIO4 as an oxygen donor in ethanol. [ABSTRACT FROM AUTHOR]