Sunlight mediated removal of toxic pollutants from Yamuna wastewater using efficient nano TeO-ZnO nanocomposites.

We have utilised our TeO-ZnO nanocomposites for Yamuna wastewater treatment in natural sunlight wherein the sampling site was Nigam Bodh Ghat, Kashmere Gate, Delhi. In BET isotherm, TZ NCs exhibited type IV isotherm forming a H3 like hysteric loop sustaining mesoporous characteristic with an increase in surface area, pore volume and pore diameter of 56.76 m/g, 0.

Formulation of dual functional gCN/TeO-ZnO nanocomposites as a controlled release nanofertilizer and antibacterial agent.

A simple cost-effective sono-chemical method was used for the synthesis of gCN/TeO-ZnO ternary (2%, 5%, and 10%) nanocomposites, having crystallite size of 12 nm. FE-SEM and transmission electron microscopy images revealed the formation of core-shell type nanocomposites with an average size of 50 nm. Further,MTCC 443 strain is used as a model organism to study the antibacterial activity of the prepared nanocomposites, using disc diffusion method.

Fabrication of chlorambucil loaded graphene- oxide nanocarrier and its application for improved antitumor activity.

The present study aims at designing a biodegradable and biocompatible nanocarrier using gelatin and reduced graphene oxide nanosheets functionalized with folic acid, for release of chlorambucil drug in controlled manner and achieving high loading efficiency. From scanning electron microscopic studies small pore like structure with rough and thick morphology on the plane of graphene oxide is clearly visible indicating high loading of drug. Further, Drug loading and encapsulation efficiency, in vitro release studies of the drug from the nanocarrier at different concentrations of reduced graphene oxide, different pH were studied.

Development of rGO encapsulated polymeric beads as drug delivery system for improved loading and controlled release of doxycycline drug.

The aim of this study was to design a biodegradable core-shell structure where in reduced graphene-oxide (rGO) and doxycycline (DXC) drug comprise the core while polymer such as chitosan (CS) and alginate (ALG) acts as shell for attaining high loading efficiency and sustained release of drug. Cytotoxic drug used in conventional chemotherapeutic methods usually suffer from poor site selectivity and this has been resolved by using targeted delivery of anticancer drug with controlled drug release property. The structural and morphological properties of as synthesized drug delivery carrier were characterized by a range of techniques.

Visible-light-driven photocatalytic degradation of safranin-T dye using functionalized graphene oxide nanosheet (FGS)/ZnO nanocomposites.

Photocatalysts suffer from a lack of separation of photogenerated excitons due to the fast recombination of charge carriers, so a strong synergistic effect exhibited by photocatalysts is promising for effective photocatalysis. Herein, we have synthesized efficient visible light functionalized graphene oxide nanosheet (FGS)/ZnO nanocomposite photocatalysts a simple and economical approach with large scale production for practical applications. A series of nanocomposites (FGS/ZnO NCs) with different amounts by weight of graphene oxide (GO) have been synthesized a facile solution route followed by calcination under environmental conditions.

Anomalous antibacterial activity and dye degradation by selenium doped ZnO nanoparticles.

Selenium doped ZnO nanoparticles synthesized by mechanochemical method were spherically shaped of size distribution of 10.2±3.4 nm measured by transmission electron microscopy.

Correlation between defects in capped ZnO nanoparticles and their antibacterial activity.

Antibacterial activity of ZnO nanoparticles (NPs) triggered by generation of reactive oxygen species (ROS) depends on the fate of photoexcited charge carriers. Batches of wide band gap ZnO NPs of 7-9nm sizes, capped with polyethylene glycol (PEG), ascorbic acid (AsA), mercaptoacetic acid (MAA) and polysorbate 80 (T-80) were synthesized by precipitation method. These capped ZnO NPs exhibited ROS induced antibacterial activity, where the ROS was measured by TBARS assay.

Antibacterial effect of chronic exposure of low concentration ZnO nanoparticles on E. coli.

The toxicity effect due to chronic exposure of ZnO nanoparticles (NPs) was systematically studied by repeatedly treating different lower concentrations of ZnO nanoparticles with culture media of E. coli strain. The chronic exposure of ZnO NPs of concentrations below minimum inhibitory concentration (MIC) exhibited higher toxicity than the single exposure of higher concentrations.

Studies on antibacterial activity of ZnO nanoparticles by ROS induced lipid peroxidation.

Recent studies indicated the role of ROS toward antibacterial activity. In our study we report ROS mediated membrane lipid oxidation of Escherichia coli treated with ZnO nanoparticles (NPs) as supported by detection and spectrophotometric measurement of malondialdehyde (MDA) by TBARS (thiobarbituric acid-reactive species) assay. The antibacterial effects of ZnO NPs were studied by measuring the growth curve of E.