@article { ISI:000250735600035, title = {Fungus-based synthesis of chemically difficult-to-synthesize multifunctional nanoparticles of CuAlO2}, journal = {Advanced Materials}, volume = {19}, number = {20}, year = {2007}, month = {NOV}, pages = {3295+}, publisher = {WILEY-V C H VERLAG GMBH}, type = {Article}, address = {PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY}, abstract = {

Fungal nanosynthesis of ternary CuAlO2 phase is achieved at 50 degrees C. This phase is chemically difficult to synthesize at low temperatures because of the incompatible oxidation chemistry of Cu and Al. The synthesized protein-capped water-dispersible nanoparticles show blue luminescence and radio-frequency absorption (see figure).

}, issn = {0935-9648}, doi = {10.1002/adma.200602605}, author = {Ahmad, Absar and Jagadale, Tushar C. and Dhas, Vivek V. and Khan, Shadab and Patil, Shankar and Pasricha, Renu and Ravi, Venkat and Ogale, Satishchandra B.} } @article { ISI:000251870400005, title = {Microwave assisted low temperature rapid synthesis of manganite system using La0.67Ce0.03Sr0.3MnO3 mini-cavity furnace}, journal = {Materials Letters}, volume = {62}, number = {2}, year = {2008}, month = {JAN}, pages = {191-193}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

Amorphous La0.7Sr0.3MnO3 (LSMO) and La0.7Ca0.3MnO3 (LCMO) precursor powders synthesized by the citrate gel method at 673 K, have been found to crystallize by microwave irradiation in just 60 s using La0.67Ce0.03Sr0.3MnO3 (Ce-LSMO) as couplant. This is the lowest temperature treatment and synthesis time so far reported in literature for the fort-nation of manganite systems. Using ceramic route, the same amorphous samples crystallize on heat treatment only at temperatures greater than 1000 K. The microwave heating through this method is novel and has tremendous potential for accelerating the evolution of the product phase in very shorter durations, with just low temperature processing of the precursors, which cannot be realized in normal process. (c) 2007 Elsevier B.V. All rights reserved.

}, keywords = {Citrate gel method, LSMO, Manganites, Microwave, Oxides}, issn = {0167-577X}, doi = {10.1016/j.matlet.2007.05.002}, author = {Kale, Sangeeta N. and Rajagopal, Rajashree and Mona, J. and Londhe, D. P. and Joshi, Rakesh S. and Jagadale, Tushar C. and Satyanarayana, C. and Ravi, V.} } @article { ISI:000259140700055, title = {N-doped TiO2 nanoparticle based visible light photocatalyst by modified peroxide sol-gel method}, journal = {Journal of Physical Chemistry C}, volume = {112}, number = {37}, year = {2008}, month = {SEP}, pages = {14595-14602}, publisher = {AMER CHEMICAL SOC}, type = {Article}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

The peroxide gel route is employed to synthesize N-doped TiO2 nanoparticles (NP) at low temperature using titanium tetraisopropoxide, ethylmethylamine, and hydrogen peroxide as precursors. Structural studies show anatase phase in the undoped titania NPs as well as at 5 at. \% N-doped titania NPs, although with a degree of matrix disorder in the latter case. The annealing of N-doped titania NPs at different temperatures shows that above 400 degrees C nitrogen escapes the O-Ti-O matrix and at 500 degrees C the sample becomes crystalline. Transmission electron microscopy reveals that the particle size is in the range of 20-30 nm for the undoped TiO2 but only 5-10 nm for N-doped TiO2. At higher nitrogen concentration (10 at. \%) bubble-like agglomerates form. FTIR and photoluminescence quenching also confirm the incorporation of nitrogen in anatase TiO2. Optical properties reveal an extended tailing of the absorption edge toward the visible region upon nitrogen doping. X-ray photoelectron spectroscopy is used to examine the electronic state of doped nitrogen and the associated possible electronic modification of the TiO2 matrix. Under visible light irradiation the undoped TiO2 NPs do not show any significant photocatalytic activity, as expected; however, the 5 at. \% N-doped TiO2 NPs show excellent activity.

}, issn = {1932-7447}, doi = {10.1021/jp803567f}, author = {Jagadale, Tushar C. and Takale, Shrikant P. and Sonawane, Ravindra S. and Joshi, Hrushikesh M. and Patil, Shankar I. and Kale, Bharat B. and Ogale, Satishchandra B.} } @article { ISI:000253767100014, title = {Rapid phase-controlled microwave synthesis of nanostructured hierarchical tetragonal and cubic beta-In2S3 dandelion flowers}, journal = {Chemical Physics Letters}, volume = {452}, number = {4-6}, year = {2008}, month = {FEB}, pages = {301-305}, publisher = {ELSEVIER SCIENCE BV}, type = {Article}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

Phase controlled synthesis of hierarchical nanostructured beta-In2S3 dandelion flowers is realized by a rapid microwave solvothermal process using indium metal, nitric acid and thiourea as precursors. The tetragonal and cubic phases of the compound have been successfully and separately stabilized in the same type of dandelion morphology by using aqueous-mediated and methanol-mediated synthesis, respectively. The possible mechanism responsible for phase control is discussed. Optical properties of the flowers as well as their hydrogen generation capability by photodecomposition of H2S under visible light are also reported. (c) 2007 Elsevier B.V. All rights reserved.

}, issn = {0009-2614}, doi = {10.1016/j.cplett.2007.12.048}, author = {Naik, S. D. and Jagadale, Tushar C. and Apte, S. K. and Sonawane, S. and Kulkarni, M. V. and Patil, S. I. and Ogale, Satishchandra B. and Kale, B. B.} } @article { ISI:000269310700020, title = {Non-templated hydrothermal growth of anisotropic magnetite nanostructures using hexamine as the directing agent}, journal = {Journal of Nanoscience and Nanotechnology}, volume = {9}, number = {10}, year = {2009}, month = {OCT}, pages = {5823-5828}, publisher = {AMER SCIENTIFIC PUBLISHERS}, address = {25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USA}, abstract = {

Anisotropic growth of magnetite (Fe(3)O(4)) nanoparticles is achieved in a hydrothermal growth process using hexamine to play a dual role of oxide forming and directing agent. The samples are characterized by X-ray diffraction, scanning electron microscopy, high resolution transmission electron microscopy, squid magnetometry, ferromagnetic resonance technique, diffuse reflectance spectroscopy and Mossbauer spectroscopy, which collectively establish the formation of Fe(3)O(4) phase. Anisotropic structures such as nanorods and nanotubules are revealed and these are shown to exhibit good humidity sensing properties.

}, keywords = {Anisotropic Nanostructures, Hexamine, hydrothermal, magnetite, Mossbauer}, issn = {1533-4880}, doi = {10.1166/jnn.2009.1244}, author = {Bhagwat, S. V. and Jouen, Samuel and Kundaliya, D. C. and Singh, H. and Jagadale, Tushar C. and Athawale, A. A. and Lofland, S. E. and Hannoyer, Beatrice and Ogale, Satishchandra B.} } @article { ISI:000281347500022, title = {Surface texture and specific adsorption sites of sol-gel synthesized anatase TiO2 nanoparticles}, journal = {Materials Research Bulletin}, volume = {45}, number = {10}, year = {2010}, month = {OCT}, pages = {1470-1475}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

The surface properties of sot-gel synthesized anatase titania (TiO2) nanoparticles are probed by sorptiometry, infrared absorption spectroscopy, UV-vis diffuse reflectance spectroscopy and high resolution transmission electron microscopy. The results reveal strong correlations of the surface area, porosity, pyridine adsorption capacity and strength, and catalytic methylbutynol decomposition activity. (C) 2010 Elsevier Ltd. All rights reserved.

}, keywords = {Catalytic properties, Nanostructures, Oxides, Sol-gel chemistry, X-ray diffraction}, issn = {0025-5408}, doi = {10.1016/j.materresbull.2010.06.026}, author = {Zaki, Mohamed I. and Mekhemer, Gamal A. H. and Fouad, Nasr E. and Jagadale, Tushar C. and Ogale, Satishchandra B.} } @article { ISI:000294586400026, title = {TiO2 nanoparticle size dependence of porosity, adsorption and catalytic activity}, journal = {Colloids and Surfaces A-Physicochemical and Engineering Aspects}, volume = {385}, number = {1-3}, year = {2011}, month = {JUN}, pages = {195-200}, publisher = {ELSEVIER SCIENCE BV}, type = {Article}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

The issue of size-sensitivity of the surface properties of anatase TiO2 is addressed by examining three samples synthesized by aqueous sol-gel method having different particle sizes on the nanoscale (8-19 nm). A number of characterization methods, namely, X-ray powder diffractometry, infrared spectroscopy, UV-vis diffuse reflectance spectroscopy, sorptiometry and electron microscopy are employed. The data obtained reveal interrelated dependencies of the surface area, porosity, nitrogen and pyridine adsorption capacity and strength, and catalytic methylbutynol decomposition activity on the size of titania nanoparticles. Pertinent size-dependent bulk properties are also revealed and used to account for the changes conceded by the surface properties. Accordingly, going from 19 to 8-nm sized titania particles has been found to stabilize the anatase structure, weaken the surface acidity, and blueshift the UV absorption edge of titania. (C) 2011 Elsevier B.V. All rights reserved.

}, keywords = {Catalytic methylbutynol decomposition activity, Nano-titania, Particle size dependencies, Pyridine sorptiometry, Surface texture}, issn = {0927-7757}, doi = {10.1016/j.colsurfa.2011.06.010}, author = {Zaki, Mohamed I. and Fouad, Nasr E. and Mekhemer, Gamal A. H. and Jagadale, Tushar C. and Ogale, Satishchandra B.} } @article { ISI:000303280000009, title = {Photocatalytic degradation of Azo dyes using Au:TiO2, gamma-Fe2O3:TiO2 functional nanosystems}, journal = {Journal of Nanoscience and Nanotechnology}, volume = {12}, number = {2}, year = {2012}, month = {FEB}, pages = {928-936}, publisher = {AMER SCIENTIFIC PUBLISHERS}, address = {26650 THE OLD RD, STE 208, VALENCIA, CA 91381-0751 USA}, abstract = {

We report photocatalytic degradation studies on Navy Blue HE2R (NB) dye on significant details as a representative from the class of azo dyes using functional nanosystems specifically designed to allow a strong photocatalytic activity. A modified sol-gel route was employed to synthesize Au and gamma-Fe2O3 modified TiO2 nanoparticles (NPs) at low temperature. The attachment strategy is better because it allows clear surface of TiO2 to remain open for photo-catalysis. X-ray diffraction, Raman and UV-VIS spectroscopy studies showed the presence of gold and iron oxide phases along-with the anatase TiO2 phase. TEM studies showed TiO2 nanocomposite particles of size similar to 10-12 nm. A detailed investigation on heterogeneous photocatalytic performance for Navy Blue HE2R dye was done using the as-synthesized catalysts Au:TiO2 and gamma-Fe2O3:TiO2 in aqueous suspension under 8 W low-pressure mercury vapour lamp irradiation. Also, the photocatalytic degradation of Amranth and Orange G azo dyes were studied. The surface modified TiO2 NPs showed significantly improved photocatalytic activity as compared to pure TiO2. Exposure of the dye to the UV light in the presence of pure and gold NPs attached TiO2 catalysts caused dye degradation of about similar to 20\% and similar to 80\%, respectively, in the first couple of hours. In the presence of gamma-Fe2O3 NPs attached TiO2, a remarkable similar to 95\% degradation of the azo dye was observed only in the first 15 min of UV exposure. The process parameters for the optimum catalytic activity are established which lead to a complete decoloration and substantial dye degradation, supported by the values of the Chemical Oxygen Demand (COD) similar to 93\% and Total Organic Carbon (TOC) similar to 65\% of the treated dye solution after 5 hours on the employment of the UV/Au:TiO2/H2O2 photocatalytic process.

}, keywords = {Azo Dye, COD, H2O2, Photocatalysis, TiO2}, issn = {1533-4880}, doi = {10.1166/jnn.2012.5171}, author = {Jagadale, Tushar C. and Kulkarni, Manjusha and Pravarthana, D. and Ramadan, Wegdan and Thakur, Pragati} }