International Journal Of Bio-Inorganic Hybrid Nanomaterials
Volume:4 Issue: 4, Winter 2016

A feasible and fast method to fabricate hydrogen peroxide sensor was investigated by graphene-manganase nanocomposite carbone paste electrode. In the present work, in first step, the graphene was synthesized by chemical method and in second step, manganese oxide nanoparticle was doped on graphene. graphene-manganase nanocomposite was characterized by FTIR and SEM. The nanocomposite shows a high conductive and sensitivity for hydrogen peroxide determination as shown by electrochemical impedance spectroscopy. Graphene-manganase nanocomposite carbone paste electrode was used for sensing of hydrogen peroxide by choronoamperometry with a potential of 250 mV (Ag/AgCl), in 0.1 M phosphate buffer solution at pH= 7. The linear concentration rang of sensor is 8.8-263.3 µM, and with detection limit of 1.04 µM. Also, the life time of sensor is infinite.

In this paper functionalized multiwall carbon nanotubes (FMWCNT) were modified using doxycycline, containing reactable nitrogen, which can attach chemically to functionalized MWCNT. The synthesized nano compounds were characterized by Fourier transform infrared spectroscopy (FT-IR) and Raman spectroscopy. These spectrums proved the existence of nitrogen atoms of amide functional groups. The morphology was also determined by scanning electron microscopy (SEM) and Transmission electron microscopy (TEM). Also the SEM and TEM images confirmed the uniformly attachment of doxycycline, onto functionalized MWCNTs.

In this paper, macrocyclic cobalt(II) complexes [CoL1](NO3)2.4H2O (1) and [CoL2] (NO3)2.2H2O (2) have been synthesized from the reaction of dialdehydes 1,2-bis(2-formylphenyl)ethane and 1,3-bis(2-formylphenyl)propane, Co(NO3)2.6H2O and 1,2-cyclohexanediamine with molar ration 1:1:1 in methanole and characterized by elemental analyses and FT-IR spectroscopy. Then used as precursors for preparation of Co3O4 nanoparticles via solid-state thermal decomposition without the need a catalyst, employing toxic solvent, template or surfactant and complicated equipment, which makes it efficient, one-step, simple and environment-friendly. The structure and morphology of the Co3O4 products were characterized by FT-IR spectroscopy, XRD and TEM. The XRD result shows that the Co3O4 products are pure, single phase and crystalline. The TEM result shows Co3O4 nanoparticles with the size between

To determine the non-bonded interaction energies between Naphthalene and B12N12 Nano ring in different orientations and distances, geometry of molecules with B3LYP method and 6-31g* basis set optimized. Also reactivity and stability of Naphthalene alone and in the presence B12N12 Nano ring checked. Then calculated the NBO, NMR, FREQ, NICS and muliken charge of Naphthalene atoms alone and in the presence B12N12 done. The results of any order to reduce the reactivity and increase stability of Naphthalene in the presence B12N12 Nano ring tells. The Gaussian quantum chemistry package is used for all calculations.

3,4-Dihydropyrimidinones and their derivatives are synthesized via Biginelli routes involving an aromatic aldehydes, ethylacetoacetates and urea in one-pot procedure by using CdS nanoparticles as efficient heterogeneous catalyst in solvent-free conditions. Compared with classical Biginelli reaction reported in 1893, this new method provides much improved modification in terms of simplicity. The present methodology offers several advantages such as a simple procedure with an easy work-up, short reaction times and excellent yields. Excellent yields and mild reaction conditions as well as the environmentally friendly character of CdS make it an important alternative to the classic acid catalyzed Biginelli's reactions. The catalysts could be recycled and reused for five times, without substantial reduction in their catalytic activities. The results are shown that electron-releasing group on aromatic ring causes reduced rate of reaction and electron with drawing group's causes increased the rate of reactions. The structure of products has been characterized by IR and 1HNMR spectra.

MnCo2O4 (MnO-Co2O3) nanocomposite as a binary oxide has been successfully prepared by precipitation method using cobalt nitrate and manganese nitrate as the precursors and then characterized by scanning electron microscopy-energy dispersive micro-analysis (SEM-EDX) and X-ray diffraction (XRD) techniques. In this work, we report the hydrolysis kinetics reactions of semi mustard (chloroethyl ethyl sulfide (CEES)/S.M), a mimic of bis (chloroethyl) sulfide (i.e. sulfur mustard) that were carried out on the surface of MnCo2O4 nanocomposite as a destructive sorbent catalyst and were performed using GC-FID and GC-MS instruments. The effect of different parameters including solvent type and reaction time on the reaction efficiency were investigated. GC-FID analysis results emphasized that the maximum hydrolysis of CEES was related to n-hexane nonpolar solvent after the elapse of the reaction (12 h) at room temperature (25±1°C) with a 95% yield. On the other hand, minimum hydrolysis was reported for methanol polar solvent under similar conditions. The rate constant and half-life (t1/2) have been calculated 6.91×10-6 s-1 and 6.98×10-5 s-1, and 105 s and 9.9×103 s for methanol and n-hexane solvents, respectively. Also, Data explore the role of the hydrolysis product, i.e. hydroxyl ethyl ethyl sulfide (HEES) in the reaction of CEES with MnCo2O4 nanocomposite and GC-MS analysis was applied to identify and quantify semi mustard destruction product.

New forms of vanadium oxide Nanoporous were fabricated using a simple chemical synthesis method. Vanadium pentoxide (V2O5) Nanoporous were synthesized by sodium metavanadate as precursor and ethylene glycol as surfactant. The samples were characterized by high resolution transmission electron microscopy (HRTEM), field effect scanning electron microscopy (FESEM) and X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and UV-Vis spectrophotometer. Structures of the nanoparticles were characterized by XRD technique to identify α-vanadium and γ-vanadium. The smallest particle size of sponge-like as-prepared sample was around 20 nm in diameter and for annealed sample was around 25 nm as estimated by XRD technique and direct HRTEM observation. The surface morphological studies from SEM depicted increasing dimension of sponge-like shaped structure by increasing ratio of the EG surfactant from 25 nm to 30 nm. The sharp peaks in FTIR spectrum determined the purity of V2O5 nanoparticles.

In this research at the first Metoprolol drug and its fullerene derivative were optimized. Natural bond orbital (NBO), nuclear Indepndent chemical shift (NICS) and finally IR calculations, for these compounds were carried out at the B3LYP/6-31G* quantum chemistry level. Different parameters such as energy levels, the amount of chemical shift in different atoms, the amount of HOMO/LUMO, chemical potential (µ), chemical hardness (η), Thermodynamic properties were determined. Metoprolol is the generic form of the brand-name drug Lopressor, prescribed to treat high blood pressure. In this study we used fullerenes, as nano drug carriers, and Fulleren drevatives of Metoprolol drug were studied. The data in Tables and graphs and shapes were compared and discussed.