low temperature hydrothermal synthesis of monodispersed flower - like titanate nanosheets

... 2008Keywords:Titania Flower- like Sphere Nanosheets Template-free Hydrothermal abstract Monodispersed ﬂower -like titanate superstructure was successfully prepared by simple hydrothermal process ... AS(d) Flower- like TiO2 (calcined 500 oC)(c) Flower- like titanate Fig. 6. Photocatalytic H2evolution from water splitting reaction over (a) ST-01(anatase powder), (b) AS, (c) as-prepared ... Low temperature hydrothermal synthesis of monodispersed ﬂower -like titanate nanosheets Jaturong Jitputtia, Thitima Rattanavoravipaa,...

a rapid hydrothermal synthesis of rutile sno2 nanowires

... SnO2nanowires at low temperature for 15–20 min.We investigated the synthesis of SnO2nanowires/nanoneedlesby a low- temperature (95–98◦C) hydrothermal method. The as-grown SnO2nanowires ... reported a low- temperature hydrothermal synthesis of SnO2nanorods at 160◦C,but the process requires at least 12h. Vayssieres and Graetzel [15]reported SnO2nanorods arrays grown on F-SnO2glass ... nanoelectronics/nanotechnologies andcan ﬁnd a wide range of applications.2. ExperimentalRutile-structured SnO2nanowires/nanoneedles were synthe-sized at a low temperature by a hydrothermal method withoutany other...

hydrothermal synthesis of monodisperse wo3 - h2o square platelet particles

... OkawaaaGraduate School of Science and Technology, Chiba University, Yayoicho 1-3 3, Inageku, Chiba 26 3-8 522, JapanbFaculty of Engineering, Chiba University, Yayoicho 1-3 3, Inageku, Chiba 26 3-8 522, JapanReceived ... etc. Hydrothermal synthesis from Na2WO4in a low pH region isone of the typical ways to prepare tungsten oxide hydrates.Freedman [5] investigated influence of acid concentration and temperature ... condition and(b) standard of WO3·H2O on the basis of JCPDS data (JCPDS No. 1 8-1 418).Fig. 3. Time evolutions of (a) the mean size of particle and COV and corres-ponding TEM images at (b)...

hydrothermal synthesis of na2ti6o13 and tio2 whiskers

... structures of alkali-metal titanates,A2TinO2n+1are well-known. All of them have amonoclinic structure with almost the same b value[4,8]. Alkali-metal titanates with a high alkali-metal ... Journal of Crystal Growth 275 (2005) e2371–e2376 Hydrothermal synthesis of Na2Ti6O13and TiO2whiskersDong-Seok Seoa, Hwan Kima, Jong-Kook Leeb,ÃaSchool of Materials Science ... ability and catalytic activ-ity [9–12]. On the other hand, alkali-metaltitanates with a low alkali-metal contentARTICLE IN PRESSwww.elsevier.com/locate/jcrysgro002 2-0 248/$ - see front matter r...

hydrothermal synthesis of tio2 nanofibres

... Hydrothermal synthesis of TiO2nanofibresFei-Bao Zhang, Hu-Lin Li⁎College of Chemistry and Chemical Engineering, Lanzhou University, ... 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. © ... synthesize TiO2nanofibres under hydrothermal conditions in alkaline solution.Compared with the other reporters who use hydrothermal me-thod to synthesize TiO2, the reaction temperature we used...

hydrothermal synthesis of tungsten oxide nanobelts

... Song).016 7-5 77X/$ - see front matter © 2006 Elsevier B.V. All rights reserved.doi:10.1016/j.matlet.2006.03.022The composition of the product was an alyzed by energy dis-persive X-ray detector ... 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 ... solution. Theselective interaction of the capping molecules on the facets of the first-formed nanoparticles is crucial to the anisotropic growth of nano-structures. For example, we have chosen...

hydrothermal synthesis of uniform wo3 submicrospheres

... solu bility of WO3is influencedby the pH value of solution. In our experiments, the rod-shaped WO3particles could decompose into primary nano-particlesduetothechangeofpHvalueofthesolutioncaused ... self- assemble to submicroscale sphereswith the proceeding of the reaction. Such self-assembly of nanoparticles is favorable to decrease the surface energy of the system.Fig. 2 – SEM images of ... produced besides rod-shaped pro-ducts (Fig. 2b). When the reaction system is proceeding to 24 h,all of the rod-shaped particles disappear and only highlyuniform submicro-sized spherical particles...

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

... particle size and low- temperature, cost-effective,and less-complicated techniques. Under hydrothermal conditions,many starting materials can undergo quite unexpected reactions,which are often accompanied ... al. [20]. The 1D nanostructure synthesis using inorganic salt instead of surfactant and water-soluble highmolecule has strong points in non-pollution, low- cost, easy-cleanout and recovery. Herein, ... Large-scale hydrothermal synthesis of WO3nanowiresin the presence of K2SO4Xu Chun Songa,⁎, Yi Fan Zhengb, E. Yanga, Yun WangaaDepartment of Chemistry, Fujian...

synthesis of pd or pt titanate nanotube and its application

... Evaluation of sensor performanceFig. 9 shows the responses of typical sensors pre-pared with the compositions of (a) Pd and Pt /titanate nanotubes (30 wt%) + ␥-Al2O3(70 wt%), (b) titanate nan-otubes ... (2007) 320–325 Synthesis of Pd or Pt /titanate nanotube and its applicationto catalytic type hydrogen gas sensorChi-Hwan Hana, Dae-Woong Honga, Il-Jin Kima, Jihye Gwaka,Sang-Do Hana,∗, ... response temperature to 120◦C [4]. We have also reported reduced maxi-mum temperature of a ﬂat-type catalytic hydrogen sensor usingTiO2and UV LED [21].It is well-known that noble metals like...

Báo cáo y học: "Low temperature tolerance of human embryonic stem cells"

... extended durations of 24h and 48h respectively. Cell survival after low temperature exposure was assessed through the MTT (Tetrazolium salt 3-( 4, 5-dimethylthiazol-2-yl )-2 , 5- diphenyltetrazolium ... expression of TRA- 1-8 1 was indicated by red fluores-cence under a wavelength of 570 nm (Rhoda-mine). The hESC colonies were assigned into 3 grades [9] ac-cording to their degree of spon-taneous ... under bright-field and phase-contrast microscopy, as well as by immunocytochemical staining for the pluripotency markers SSEA-3 and TRA- 1-8 1 [4]. Finally, chromosome analysis of the low temperature...

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