@article { ISI:000255001300003, title = {Physicomechanical and magnetic properties of neoprene based rubber ferrite composites}, journal = {Polymer-Plastics Technology and Engineering}, volume = {47}, number = {2}, year = {2008}, month = {JAN}, pages = {137-146}, publisher = {TAYLOR \& FRANCIS INC}, address = {325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA}, abstract = {

Fine (approximately 18nm) particles of nickel ferrite were synthesized by the sol-gel technique, and their structural properties were evaluated by X-ray diffraction. Neoprene-based rubber ferrite composites were prepared by incorporating these nickel ferrite powders in the rubber matrix according to a specific recipe. The cure characteristics were analyzed, and the samples were molded into particular shapes whose properties were determined according to ASTM standards. Magnetization studies were carried out using a Vibrating Sample Magnetometer. This study indicates that neoprene rubber-based flexible magnets with desired magnetic properties and appropriate mechanical properties can be prepared by incorporating an adequate amount of nanoscale nickel ferrite particles within the rubber matrix.

}, keywords = {Ferrite, ferrite composites, flexible magnets, neoprene rubber, rubber, Sol-gel method}, issn = {0360-2559}, doi = {10.1080/03602550701815946}, author = {Prema, K. H. and Kurian, Philip and Joy, Pattayil Alias and Anantharaman, Maliemadom R.} } @article { ISI:000254416300052, title = {Synthesis and magnetic properties of barium-calcium hexaferrite particles prepared by sol-gel and microemulsion techniques}, journal = {Journal of Magnetism and Magnetic Materials}, volume = {320}, number = {6}, year = {2008}, month = {MAR}, pages = {1095-1101}, publisher = {ELSEVIER SCIENCE BV}, type = {Article}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

The preparation of W-type hexaferrite particles with the composition BaCa2Fe16O27 by microemulsion and a stearic acid sol - gel method with and without surfactant has been investigated at various sintering temperatures. The structural and magnetic characteristics have been studied by X-ray diffraction ( XRD), a vibrating sample magnetometer ( VSM), scanning electron microscopy ( SEM), thermogravimetric analysis ( TGA), differential scanning calorimetric ( DSC) and Fourier transform infrared ( FTIR) techniques. The effect of sintering temperature on the properties of BaCa2Fe16O27 hexaferrites has been studied. The value of saturation magnetization ( M-s) depends on types of surfactant used. The sample prepared in the presence of polyoxyethylene ( 20) sorbitan monooleat ( Tween 80) shows low saturation magnetization ( M-s 15.10 emu/g), whereas the other sample prepared in the presence of a surfactant cetyltrimethylammonium bromide (CTAB) exhibits high saturation magnetization (M-s = 24.60 emu/g) compared to the normal sample. (C) 2007 Elsevier B. V. All rights reserved.

}, keywords = {BaCa2Fe16O27, hexaferrite, magnetic property, Microemulsion, Sol-gel method, surfactant}, issn = {0304-8853}, doi = {10.1016/j.jmmm.2007.10.032}, author = {Jotania, R. B. and Khomane, Ramdas B. and Chauhan, C. C. and Menon, Shamal K. and Kulkarni, B. D.} } @article { ISI:000265811500010, title = {MoO3/SiO2: an efficient and selective catalyst for the synthesis 1,3-dioxolane and 1,3-dioxane}, journal = {Catalysis Communications}, volume = {10}, number = {10}, year = {2009}, month = {MAY}, pages = {1404-1409}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

A series of MoO3/SiO2 catalysts with varying amounts of MoO3 has been synthesized and the catalytic activities of these were compared with the known solid acid catalysts in the synthesis of 1,3-dioxolane. MoO3/SiO2 catalyst showed a better activity and selectivity in 1,3-dioxolane synthesis compared to the other catalysts. MoO3/SiO2 catalyst system was further successfully applied for the synthesis of 1,3-dioxanes in the Prins cyclization of olefins and formaldehyde. The proposed catalyst was thermally stable and could be recovered and reused at least in four consecutive cycles with no significant loss in the substrates conversions and products selectivities. (C) 2009 Elsevier B.V. All rights reserved.

}, keywords = {1, 3-Dioxolanes, Cycloaddition, MoO3/SiO2, Prins cyclization, Sol-gel method, solid acid catalysts}, issn = {1566-7367}, doi = {10.1016/j.catcom.2009.03.007}, author = {Amrute, Amol P. and Sahoo, Suman and Bordoloi, Ankur and Hwang, Young Kyu and Hwang, Jin-Soo and Halligudi, Shiva B.} } @article {45478, title = {Evolution of ZnO nanostructures as hexagonal disk: Implementation as photoanode material and efficiency enhancement in Al: ZnO based dye sensitized solar cells}, journal = {Applied Surface Science}, volume = {470}, year = {2019}, month = {MAR}, pages = {1130-1138}, type = {Article}, abstract = {

Hexagon shaped pristine and Al doped ZnO nanodisks (NDs) with exposed +/- [0001] polar facets were successfully synthesized using modified sol-gel method without the involvement of any structural directing or capping agents. It was investigated that OH- ions in mixed solvent system is responsible for pore formation and inhibit the growth of ZnO along the direction of c-axis leading to a high percentage exposure of active +/- [0001] polar facets and encourage the formation of ZnO NDs. Crystallographic analysis revealed that crystallite size and lattice constants are decreased, with the addition of Al3+ ions. The results obtained from Raman, and XPS analysis further corroborated with the XRD results, revealed the successful incorporation of Al3+ ions into ZnO lattice. Optical study revealed the band gap tunability with the incorporation of Al ion as dopant. Enhanced power conversion efficiency (PCE) of 1.96\% (J(sc) similar to 7.69 +/- 0.23 mA/cm(2)) was observed for Al: ZnO hexagonal NDs based DSSC. The increased PCE in Al: ZnO based DSSC can be attributed to the higher inner surface area for dye anchoring by the interconnected network of the disk-like structure. The obtained results were satisfactory and most importantly the synthesis procedure proposed in present work is excellent for the synthesis of perfectly hexagonal shaped disks under precised synthesis parameters. The device interface study was further conducted using electrochemical impedance spectroscopy which revealed better charge transport process and charge storage ability with the incorporation of Al3+ ions into ZnO lattice.

}, keywords = {dye sensitized solar cells, Hexagonal disks, Sol-gel method, ZnO}, issn = {0169-4332}, doi = {10.1016/j.apsusc.2018.11.077}, author = {Parra, Mohammad Ramzan and Pandey, Padmini and Siddiqui, Hafsa and Sudhakar, Vediappan and Krishnamoorthy, Kothandam and Haque, Fozia Z.} }