PMMA Based Polymer Gel Electrolyte Containing LiCF3SO3

Vol.2  No.1

Year : 2014

Issue : Apr-Jun

Title : PMMA Based Polymer Gel Electrolyte Containing LiCF3SO3

Author Name : Narinder Arora, Ajay Sharma , Amit Kumar , Rajesh Kumar

Synopsis :

Effect of polymer (PMMA) and salt (LiCF3SO3 ) on the conducting behaviour of polymer gel electrolytes in non-volatile solvent (PC) has been studied. The maximum ionic conductivity ( = 2.92 mS/cm) of polymer gel electrolyte has been observed at room temperature. An anomalous conducting behaviour is observed at small content of PMMA addition in o o gel electrolyte. Small increase in conductivity observed with increasing temperature (range 10 -70o C) is in factor-wise only, which makes these gel electrolytes suitable for many device applications.

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Preparation And Characterisation Of Rare Earth Doped Phosphate Glasses

Vol.2  No.1

Year : 2014

Issue : Apr-Jun

Title : Preparation And Characterisation Of Rare Earth Doped Phosphate Glasses

Author Name : Manpreet Kaur, Mehak Mahajan , Mohini Bhatia , Sarabjit Kaur , Lakhwant Singh

Synopsis :

Phosphate glasses with composition 50P O -30CaO-(20-x) Li O-xCeO with x varying from 0-2.0 mol % were prepared 2 5 2 2 using the conventional melt quench technique. The amorphous nature of prepared glasses was confirmed from the XRD(X-Ray Diffraction) spectra. The density and Molar volume of the glasses was found using the Archimedes principle. 3 The value of the density lies in the range of 3.58-3.71 g/cm . The density of the prepared glasses was found to increase with the concentration of CeO . This was explained as the molecular weight of CeO is more as compared to the 2 2 molecular weight of Li O. The Raman spectra was obtained for the prepared glass samples and it was found that no new 2 peaks are formed with the doping of CeO , and only there is a change in the intensity of peaks and the peaks are red 2 shifted. The bandgap energy is found to decrease with CeO doping due to the formation of more NBOs.

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Burnishing a Super Finishing Process – A Review

Vol.1  No.4

Year : 2014

Issue : Jan-Mar

Title : Burnishing a Super Finishing Process – A Review

Author Name : Aashish Sharma, S.B.S Kalsi

Synopsis :

Burnishing is considered as a super finishing process. In this process, the metallic surface of the work piece undergoes plastic deformation by the pressing action of a hard and highly polished rotating ball or roller. By using finishing processes such as reaming, boring, etc., we can have the good surface finish but there is no affect on the surface characteristics of the material. Improvements in surface finish, surface hardness, wear resistance and corrosion resistance can be achieved by the application of this process. Burnishing parameters such as burnishing speed, burnishing force, burnishing feed, plays an important role in the improvement of the surface characteristics of the material. To select the burnishing parameters to reduce the surface roughness and to increase the surface hardness is especially crucial. The aim of this paper is to critically discuss the affect of different parameters on burnishing.

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Enhanced Antioxidant Activity Of Gold Nanoparticles Embeded Solanum Tuberosum Extract And HPTLC Quantification

Vol.1  No.4

Year : 2014

Issue : Jan-Mar

Title : Enhanced Antioxidant Activity Of Gold Nanoparticles Embeded Solanum Tuberosum Extract And HPTLC Quantification

Author Name : Roopa Rani, Kiran Singh, Manmohan Srivastava

Synopsis :

The facile synthesis of stable gold nano particles embeded solanum tuberosum (GNPST) is demonstrated using extract of Solanum Tuberosum. The best parameters for the synthesis were NaAuCl4 salt (0.1M, 2 μL) at room temperature. The results were verified using UV-Vis spectrometry, XRD, AFM and SEM. GNPST were monodispersed and of the size (40 ± 20nm). DPPH and Fenton bioassay indicated that GNPST exhibit 12% enhancement in antioxidant activity. HPTLC detection identified ascorbic acid as major antioxidant compound in the potato extract.

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Effect Of Gamma Irradiation On Structural And Optical Properties Of Muscovite Mica

Vol.1  No.4

Year : 2014

Issue : Jan-Mar

Title : Effect Of Gamma Irradiation On Structural And Optical Properties Of Muscovite Mica

Author Name : Sukhnandan Kaur, Surinder Singh, Lakhwant Singh

Synopsis :

Present work reports the structural and optical properties of pristine and gamma irradiated muscovite mica. The XRD spectra are used to estimate structural parameters such as crystallite size and micro strain of pristine and irradiated samples. Williamson Hall analysis is employed to calculate crystallite size and micro strain of pristine and irradiated sheets. UV-VIS analysis provides the value of optical indirect, direct band gap and Urbach energy. It was found that the value of optical indirect and direct band gap increases with the increase of gamma dose upto 100 kGy and then decreases with further increase in gamma dose upto 2000 kGy. Thus, the increase of optical band gap makes natural muscovite fits for efficient optoelectronic devices.

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Synthesis of Polyaniline-Zinc Oxide Composites and Its Usage as Ammonia Gas Sensor

Vol.1  No.4

Year : 2014

Issue : Jan-Mar

Title : Synthesis of Polyaniline-Zinc Oxide Composites and Its Usage as Ammonia Gas Sensor

Author Name : Vivek Talwar, Ravi Chand Singh

Synopsis :

This paper present synthesis of Polyaniline-Zinc Oxide Composites and their usage as Ammonia Gas Sensor. The authors adopted a novel chemical route for the synthesis of polyaniline composites via chemical method. These samples were prepared by oxidation of aniline via rapid mixing method. Aniline solution is prepared in sulphuric acid with addition of fixed wt % of zinc oxide. PANI-ZnO composites were synthesized by rapid mixing of ammonium persulphate to aniline solution in an ice bath. The synthesized samples were characterized using X-ray Diffraction (XRD) and Field Emission Scanning Electron Microscope (FESEM) techniques. The morphology of synthesized samples exhibited fibrous and spherical structures. The thick films were prepared salt deposited on alumina substrate for gas sensing application. These sensors exhibited excellent response and recovery time, when exposed to different concentration of ammonia gas at room temperature.

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Cellulosic Nanocomposites: Functional Vector For Arsenic Remediation

Vol.1  No.4

Year : 2014

Issue : Jan-Mar

Title : Cellulosic Nanocomposites: Functional Vector For Arsenic Remediation

Author Name : Kiran Singh, TJM Sinha, Shalini Srivastava

Synopsis :

Surface Functionalization of Nanocrystalline Cellulose using Diethyl Amine was carried out to form an Anion Adsorbent (3-N-N' dimethylamino-2-hydroxypropyl Nanocrystalline Cellulose Ether) for Arsenic Remediation. The product was thoroughly characterized using modern tools. Nano-biosorbent had high efficiency of removal of trivalent (85.20 %) and pentavalent (97.60 %) arsenic from aqueous solutions, even at low concentrations. Adsorption capacity was found to be 8.28 and 9.56 mg/g for As (III) and As (V) respectively. Functionalized nano-biosorbent is ideally suited for economic biosorbent for pretreatment step before large scale chemical treatments for arsenic remediation.

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