Collagen Biocomposites Derived from Fish Waste: Doped and Cross-Linked with Functionalized FeO Nanoparticles and Their Comparative Studies with a Green Approach.

Collagen-based nanobiocomposites can reabsorb and are biodegradable. These properties are effectively controlled by the number of cross-links. This study demonstrates an effortless and proficient approach for the functionalization of FeO NPs for cross-linking collagen obtained from biowaste, viz.

Design of an Efficient Tin Selenide-Based Ternary Nanocomposite Electrode for Simultaneous Determination of Paracetamol, Tryptophan, and Caffeine.

Electrochemical sensors play an essential role in the medical arena through assessing the drug quality and diagnosing diseases. The design of sensors relies on the electroactive properties of the material meticulously chosen to modify the electrode. Here in this work, a facile ternary SnSe/TiO@GO electroactive nanocomposite was prepared using tin selenide (SnSe) in combination with titanium dioxide (TiO) embedded on graphene oxide (GO).

Multiwalled Carbon Nanotubes/Gold Nanoparticles Hybrid Electrodes for Enzyme-Free Electrochemical Glucose Sensor.

We followed a facile strategy to fabricate glucose sensors using mildly oxidized multiwalled carbon nanotubes (MWCNTs), gold nanoparticles (AuNPs) and thiol acids including mercaptoacetic acid (MAA), mercaptopropionic acid (MPA), and mercaptosuccinic acid (MSA). The thiol acids separately bonded to MWCNTs anchored AuNPs of average diameter 14 nm, and yielded three different nanohybrids; MWCNTs-MAA-AuNPs, MWCNTs-MPA-AuNPs and MWCNTs-MSA-AuNPs. The nanohybrids after coating onto glassy carbon (GC) electrode resulted into enzyme free glucose sensors (GC-MWCNTs-MAA-AuNPs, GC-MWCNTs-MPA-AuNPs and GC-MWCNTs-MSA-AuNPs).

Fabrication of SnS/TiO@GO Composite Coated Glassy Carbon Electrode for Concomitant Determination of Paracetamol, Tryptophan, and Caffeine in Pharmaceutical Formulations.

Designing an electrochemical sensor which is simple, cheap, sensitive, fast, and accurate is inevitable, as it is important in drug quality control, point-of-care diagnosis, and other clinical studies. Sensors for simultaneous determination of paracetamol, tryptophan, and caffeine have not been reported so far, and we report an electrochemical sensor via incorporating tin sulfide (SnS) and titanium dioxide (TiO) on graphene oxide (GO) sheets (SnS/TiO@GO ternary composite) for their separate and simultaneous determination through cyclic voltammetry and differential pulse voltammetry techniques. The surface morphology and structural properties of the composite were characterized by analytical techniques.

Core-Shell Nanostructured FeO-Poly(styrene--vinylbenzyl chloride) Grafted PPI Dendrimers Stabilized with AuNPs/PdNPs for Efficient Nuclease Activity.

Four different novel magnetic core-shell nanocomposites stabilized with Au/Pd nanoparticles (NPs) were prepared by a simple procedure and demonstrated their catalytic activity for effective cleavage of pBR322 DNA. Initially, the FeO-poly(styrene-divinylbenzene-vinylbenzyl chloride) (ST-DVB-VBC) matrix functionalized with 3-aminobenzoic acid was prepared and grafted with PPI-G(2) and PPI-G(3) dendrimers. Each core-shell matrix was immobilized with AuNPs and PdNPs separately.

Surface Grafted Hyper-Branched Polyglycerol Stabilized Ag and AuNPs Heterogeneous Catalysts for Efficient Reduction of Congo Red.

Six types of insoluble polymer-supported beads immobilized with Ag and AuNPs nanoparticle catalysts were synthesized using newly prepared three different types of polymer-supported poly(styrene)-co-poly(vinyl benzene chloride) matrix (PS-PVBC), surface grafted with (i) triethanolamine (TEA), (ii) glycidyl trimethyl ammonium chloride (GTMAC) and (iii) hyper-branched polyglycerol (HPG) and Ag and AuNPs as a catalytic moiety and thus yield polymer-supported nanoparticle catalysts viz., PS-PVBC-TEA-AgNPs and AuNPs, PS-PVBC-g-GTMAC-AgNPs and AuNPs and PS-PVBC-g-GTMAC-AgNPs and AuNPs catalyst respectively. These bead-shaped heterogonous nanoparticle catalysts were characterized by UV-Vis, FTIR, FESEM, HRTEM and TGA techniques.

Development of stable pollution free TiO2/Au nanoparticle immobilized green photo catalyst for degradation of methyl orange.

Two types of heterogeneous nanoparticle immobilized photocatalysts viz., PSP4VP-TiO2 and PSP4VP-TiO2-Au were synthesized by immobilization of TiO2 and TiO2-Au nanoparticles individually onto the insoluble cross-linked poly(styrene)-co-poly(4-vinylpyridine) as a common matrix. These two different green photocatalysts were characterized by FT-IR, SEM, HRTEM and EDS analyses and proves that the respective nanoparticles were found to immobilize onto the matrix.

Environmentally benign heterogeneous nano-particle catalysts: synthesis, characterization and catalytic activity of 4-nitrophenol.

Pollution free catalyst is an attractive area of current interest. The p-Aminophenol is one of the most significant catalyst, because it involves the manufacture of various pharmaceuticals. Crosslinked poly(styrene)-co-poly(4-vinylimidazole) (PSPVIM) was prepared by varying the crosslinked monomer ratio as 2% and 10% respectively.

Catalysis by hydrophobically modified poly(propylenimine) dendrimers having quaternary ammonium and tertiary amine functionality.

Four different quaternary ammonium chloride-modified poly(propylenimine) (PPI) dendrimers were synthesized by alkylation of a PPI dendrimer having eight dimethylamino end groups with 1-bromooctane or 1-bromododecane. By varying the mole ratio of alkyl bromide to dendrimer, averages of 4-10 quaternary ammonium groups were formed. The new amphiphilic dendrimers are surface active and are micellar catalysts in water.