hydrothermal synthesis of na2ti6o13 and tio2 whiskers

... Journal of Crystal Growth 275 (2005) e2371–e2376 Hydrothermal synthesis of Na2Ti6O13 and TiO2 whiskers Dong-Seok Seoa, Hwan Kima, Jong-Kook Leeb,ÃaSchool of Materials Science and Engineering, ... materials and highinsulators, and TiO2 whiskers can be applied for catalyst support and photocatalysts. Na2Ti6O13 whiskers were easilysynthesized by hydrothermal treatment of the mixed ... shape of theparticles from needle-like, ﬁber, and eventuallyto the long and thin whiskers with a smoothsurface. The morphology of the whiskers seemedto be inﬂuenced by the reaction time and temperature...

hydrothermal synthesis of tio2 nanofibres

... Hydrothermal synthesis of TiO2nanofibresFei-Bao Zhang, Hu-Lin Li⁎College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou ... 2006AbstractTiO2nanofibres were synthesized by the hydrothermal method. The result shows that the growth of TiO2nanofibres is sensitive to theconcentration of NaOH and the heating temperature.© ... NaOHsolutions up to 80% of its capacity, maintained at 160 °C for24 h, and then cooled to room temperature naturally. A whiteprecipitation was filtered and washed with distilled water and absolute ethanol...

a rapid hydrothermal synthesis of rutile sno2 nanowires

... USAdAdvanced Materials Processing and Analysis Center, and Department of Mechanical, Materials, and Aerospace Engineering,University of Central Florida, Orlando, FL 32816, USAarticle infoArticle ... to the c-axis [25]. Seven modes of A2u, and 3Eu, are infrared (IR) active and two modes of A2g, and B1u,areinactive [23].Fig. 4 shows the Raman spectra of the nanowires in thewavenumber ... investigated the synthesis of SnO2nanowires/nanoneedlesby a low-temperature (95–98◦C) hydrothermal method. The as-grown SnO2nanowires have diameters of 50–150 nm and lengths of 10–100 ␮m....

hydrothermal synthesis of monodisperse wo3 - h2o square platelet particles

... standard condition and (b) standard of WO3·H2O on the basis of JCPDS data (JCPDS No. 18-1418).Fig. 3. Time evolutions of (a) the mean size of particle and COV and corres-ponding TEM images ... image of obtained particles in the standard condition and their sizedistribution evaluated from TEM observations.Fig. 2. XRD patterns of (a) particles obtained in the standard condition and (b) ... distributions of properties such as response time, precise controls of properties,regular arrangement of particles on electrode, etc. Hydrothermal synthesis from Na2WO4in a low pH region isone of...

hydrothermal synthesis of tungsten oxide nanobelts

... speed and orientation of crystals. The size and structure for growth units depend on the hydrothermal reactionconditions. The addition Na2S and proper content of HCl produceddifferent kinds of ... Results and discussionThe morphologies of as-prepared WO3nanobelts were determinedby SEM and TEM (Fig. 1). Fig. 1a and b shows the typical patterns of WO3nanobelts prepared via the hydrothermal ... during the hydrothermal reaction. From the re-sults, it can be concluded that addition of Na2S and CTAB at the sametime is important and both of them affect corporately on the formation of WO3nanobelts.The...

hydrothermal synthesis of uniform wo3 submicrospheres

... Laboratory of Oil and Gas Fine Chemicals, College of Chemistry and Chemical Engineering, Xinjiang University, No. 14 ShengliRoad, Urumqi 830046, ChinabCollege of Physics Science and Technology, ... applications of electrochromicdevices, gas sensors and photocatalysts due to its relativenarrower band gap (between 2.6 and 2.8 eV) [1–3]. Many researchefforts have been devoted to the fabrication of ... distilled water and dried at roomtemperature in air for 2 h. Then 0.5 g of the above tungstenacid powder and 1 g of thiourea were mixed into 30 ml distilledwater. After 10 min of stirring, the...

large-scale hydrothermal synthesis of wo3 nanowires in the presence of k2so4

... withdiameter of about 100 nm. With the addition of 15 g K2SO4, themorphologies of synthesized WO3shown in Fig. 4b are the mixture of nanorods and nanoparticles. Nanorods and nanowires ... process and the growth of the WO3nanowires. With the addition of different inorganic salts, thecompositions and the corresponding properties of the solution aredifferent in t he hydrothermal ... oxide.Recently, the hydrothermal synthesis of ultralong and single-crystalline Cd(OH)2nanowires using alkali salts as mineralizerswas reported by Tang et al. [20]. The 1D nanostructure synthesis using...

low temperature hydrothermal synthesis of monodispersed flower - like titanate nanosheets

... (SEM), and X-ray diffraction (XRD) observation of as-synthesized product revealed the formation of flower-liketitanate with diameter of about 250–450 nm and BET surface area (SBET) of 350.7 ... techniques, the hydrothermal method offers an inexpensive and environmentallyfriendly route and the ability to control chemical, homogeneity,purity, morphology, shape, and phase composition of the powderunder ... [1,19], due to the factthat the synthesis of these TiO2nanomaterials offer fundamentalscientific opportunities for investigating the influence of size and dimensionality of materials with respect...

synthesis of y-branched tio2 nanotubes

... However, thereis no report on the synthesis of branched TiO2nanotubes. In thiscommunication, we report for the first time, the synthesis, and characterization of Y-branched TiO2nanotube structures ... nanotubesFig. 1. FESEM images of: (a) front view and (b) cross sectional of the Y-branched TiO2nanotube arrays prepared at 20 V and two different temperatures.Fig. 2. TEM image of a Y-branched TiO2nanotube ... Synthesis of Y-branched TiO2nanotubesS.K. Mohapatra, M. Misra⁎, V.K. Mahajan, K.S. RajaCenter for Materials Reliability, Chemical and Metallurgical Engineering, MS 388, University of...

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