hydrothermal synthesis of monodisperse wo3 - h2o square platelet particles

. Hydrothermal synthesis of monodisperse WO 3 ·H 2 O square platelet particles Fumiyuki Shiba a, ⁎ , Masakazu Yokoyama a , Yousei Mita b , Tomohiro. of the EC materials. Monodisperse particles are particularly expected to give sharp distributions of properties such as response time, precise controls of properties, regular arrangement of particles. patterns of (a) particles obtained in the stand...

Ngày tải lên: 19/03/2014, 16:48

. solu bility of WO 3 is influenced by the pH value of solution. In our experiments, the rod- shaped WO 3 particles could decompose into primary nano- particlesduetothechangeofpHvalueofthesolution caused. primary particles gradually self- assemble to submicroscale spheres with the proceeding of the reaction. Such self-assembly of nanoparticles is favorable to decrease the surface energy of the...

Ngày tải lên: 20/03/2014, 13:04

. instead of surfactant and water-soluble high molecule has strong points in non-pollution, low-cost, easy- cleanout and recovery. Herein, we describe a facile inorganic route for synthesis of uniform. synthesize one-dimensional nanostructured materials [5–14]. Of the meth- ods used in 1D nanostructure synthesis, hydrothermal processes have emerged as powerful tools for the fabrication of anisotro...

Ngày tải lên: 20/03/2014, 13:04

. investigated the synthesis of SnO 2 nanowires/nanoneedles by a low-temperature (95–98 ◦ C) hydrothermal method. The as- grown SnO 2 nanowires have diameters of 50–150 nm and lengths of 10–100 ␮m.. diameters of tin oxide nanowires are in the range of 70–150 nm with lengths of the order of 20–100 ␮m. When the ratio between SnCl 4 and NH 4 OH is as high as 1:20 we obtain long tetragonal square-...

Ngày tải lên: 19/03/2014, 16:47

. Journal of Crystal Growth 275 (2005) e2371–e2376 Hydrothermal synthesis of Na 2 Ti 6 O 13 and TiO 2 whiskers Dong-Seok Seo a , Hwan Kim a , Jong-Kook Lee b,Ã a School of Materials Science. structures of alkali-metal titanates, A 2 Ti n O 2n+1 are well-known. All of them have a monoclinic structure with almost the same b value [4,8]. Alkali-metal titanates with a high alkali- metal. powder made...

Ngày tải lên: 20/03/2014, 13:04

. Hydrothermal synthesis of TiO 2 nanofibres Fei-Bao Zhang, Hu-Lin Li ⁎ College of Chemistry and Chemical Engineering, Lanzhou University,. March 2006 Abstract TiO 2 nanofibres were synthesized by the hydrothermal method. The result shows that the growth of TiO 2 nanofibres is sensitive to the concentration of NaOH and the heating temperature. ©. novel strategy to synthesize TiO 2 nanofibres under...

Ngày tải lên: 20/03/2014, 13:04

. solution. The selective 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. during the hydrothermal reaction. From the re- sults, it can be concluded that addition of Na 2 S and CTAB at the same time is important and both of them affect corporately on the formation of WO 3 na...

Ngày tải lên: 20/03/2014, 13:04

. N 2 -sorption analysis, scanning electron microscopy (SEM), and X-ray diffraction (XRD) observation of as-synthesized product revealed the formation of flower-like titanate with diameter of about. Preparation of monodispresed amorphous TiO 2 spheres Monodispersed amorphous spherical TiO 2 particles were syn- thesized through controlled hydrolysis of titanium tetraisopropox- ide (TTIP, Ti-(OC 3 H...

Ngày tải lên: 20/03/2014, 13:04

... the length of the ZnO-NWA is much longer that of the ZnO-NWZ and the diam- eter of the ZnO-NWA is much smaller than that of the ZnO-NWZ. These results ... different hydrothermal temperatures that the length of the ZnO-NWZ increases and the diameter of the ZnO-NWZ enlarge extremely with the increase of...

Ngày tải lên: 06/05/2014, 13:22

... been prepared by using the hydrothermal synthesis. For examp le, Lian et al. [15] synthesized hexagonal ZnO micro-cups and micro-rings assem bled by nanoparticles via a template-free hydrothermal synthetic ... 8969– 8973 Hydrothermal synthesis of dumbbell-shaped ZnO microstructures Feng Wang a,n , Xiaofang Qin a , Zhenliang Guo a , Yanfeng Meng a , Lixia Yang a , Yongfei Ming b a S...

Ngày tải lên: 06/05/2014, 13:24