A novel strategy for green synthesis of colloidal porphyrins/silver nanocomposites by Sesbania sesban plant and their catalytic application in the clean oxidation of alcohols

The first and low cost copper Schiff base/manganese oxide bio nanocomposite from unwanted plants as a robust industrial catalyst

In this paper, the first bio-nano colloid including manganese oxide nanoparticles and copper nanocomplex in the presence of Amaranthus spinosus as one unwanted plant was prepared (Mn₃O₄/CuL bio-nanocolloid). As-prepared bio nanocolloid was analysed completely by different techniques such as FT-IR, ICP-AES, SEM, EDX, TEM and elemental analysis to have the size, structure, morphology and elements in this compound. This bio-nanocolloid showed high catalytic activity towards green oxidation reactions of alcohols using hydrogen peroxide under solvent free conditions. The longevity, easy and practical recoverability of the solid catalyst was also confirmed for six times. The natural starting material for a long-term stability catalyst preparation, using ideal oxidant (H₂O₂), solventless and easy work up show the great potential in scalability for actual industries applications.

In vivo evaluation of the wound healing properties of bio-nanofiber chitosan/ polyvinyl alcohol incorporating honey and Nepeta dschuparensis

Engineering bioscaffolds for improved cutaneous tissue regeneration remains a healthcare challenge. To help address this problem, we report on the fabrication and characterization of electrospun polyvinyl alcohol and chitosan (PVA/Chit) nanofiber mats loaded honey and Nepeta dschuparensis plant for faster wound healing applications. The morphology of nanofiber mats was examined by SEM and TEM. The physicochemical and thermal stability characterizations were done by FT-IR and TGA/DTA, which reveal the presence of honey and desired plant into the nanofibers. PVA/Chit@Nep/Hon was investigated for wound healing therapy as a potential therapeutic agent. The in vivo wound healing studies on the rats for 21 days revealed the wound healing faster within three weeks by the incorporation of honey and plant into the nanofiber mats and hence these nanofiber mats show great potential in acute and chronic wound healing applications.

Ultrasonic assisted fabrication of first MoO3/copper complex bio-nanocomposite based on Sesbania sesban plant for green oxidation of alcohols

MoO₃ nanoparticles were obtained using Sesbania sesban. Novel Schiff base ligand and its nanocomplex of copper were synthesized under ultrasonic irradiation. First MoO₃/Copper Schiff base complex nanocomposite (NMCS) based on this natural plant was prepared and characterized by TEM, SEM, AFM, FT-IR, TGA, EDAX and elemental analysis. Then atom-efficient and selective oxidation of alcohols using hydrogen peroxide catalyzed by NMCS bio-nanocomposite under ultrasonic irradiation was reported. Structurally diverse set of alcohols was transformed into desired aldehyde and ketone products with high conversion and excellent selectivity under solvent free conditions. Products were isolated easily from green media, and the catalyst could be reused six times without any appreciable decrease in catalytic activity and selectivity.

Morphology control of colloidal silver bio-nanoparticles leaves shape using Sesbania sesban

Sesbania sesban extract solution (SSL) was used as a reducing and stabilizing agent for the synthesis of colloidal silver nanoparticles (AgNPs). The effect of time on the formation of nanoparticles was investigated using ultraviolet–visible spectroscopy. The AgNPs were synthesized after 25 min and characterized by high-resolution transmission electron microscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD). The average sizes of nanoparticles were estimated to be between 10 and 30 nm. The XRD of AgNPs, after 4 months, showed the stability of nanoparticles in air. The effects of silver nitrate concentrations and SSL concentrations on the morphology and size of synthesized AgNPs were observed by SEM.