hydrothermal synthesis of dumbbell-shaped zno microstructures

... prepared ZnO products are mainly composed of dumbbell-shaped microstructures with a few nanorods. The length of the dumbbell-shaped ZnO microstructures is about 5–20 μm, the diameters of the two ... respectively. The dumbbell-shaped ZnO microstructures may be formed by self-assembly of ZnO nanorods with 1– 5 μm in length and 100–200 nm in diameter. The PL spectrum...

Ngày tải lên: 06/05/2014, 13:24

... www.elsevier.com/locate/apsusc Controllable hydrothermal synthesis of ZnO nanowires arrays on Al-doped ZnO seed layer and patterning of ZnO nanowires arrays via surface modification of substrate Jin ... the length of the ZnO- NWA is much longer that of the ZnO- NWZ and the diam- eter of the ZnO- NWA is much sma...

Ngày tải lên: 06/05/2014, 13:22

... micrographs of ZnO prepared with different concentration of NaOH are shown in Fig. 7.With the molar ratio of Zn 2+ to NaOH Fig. 6. TEM images of ZnO with ... The preparation of ZnO micro/nanostructures ZnO nanostructures were synthesized by using a simple hydrothermal method. A certain amount of zinc nit...

Ngày tải lên: 06/05/2014, 13:23

... [12]. The absence of the E 1 (LO) mode of ZnO crystal at 583 cm − 1 which is associated with oxygen deficien- cy reveals the high quality of the ZnO nanorods [13,14]. SEM images of ZnO nanorods are ... on improving the sensing performance of 1D ZnO based gas sensors. Consequently, synthesis of 1D ZnO nanostructure with different morphologies and sizes is of significant...

Ngày tải lên: 06/05/2014, 13:24

... change of ZnO nanostructures with different pH in the hydrothermal process [17]. Alver et al. investigated the influence of pH on the optical and morphological properties of ZnO fabricated by hydrothermal method ... dried at 100 °C. The ZnO samples prepared at the pH of 11, 12, 13 and 14 were denoted as ZnO- 11, ZnO- 12, ZnO- 13 and ZnO- 14, respectively. In order to inve...

Ngày tải lên: 06/05/2014, 13:26

... www.elsevier.com/locate/mseb A rapid hydrothermal synthesis of rutile SnO 2 nanowires O. Lupan a,b,∗ , L. Chow a , G. Chai c , A. Schulte a ,S.Park a , H. Heinrich a,d a Department of Physics, University of Central Florida, ... Sn(OH) 2− 6 anions. Sn(OH) 4 hydrothermal condition −→ SnO 2 + 2H 2 O (7) (Sn(OH) 6 ) 2− hydrothermal condition −→ SnO 2 + 2H 2 O + 2OH − (8) The concent...

Ngày tải lên: 19/03/2014, 16:47

... 2006 Abstract Monodisperse particles of tungsten(VI) oxide monohydrate were prepared in a hydrothermal system at 40 °C, where 20 ml of HCl solution (1.50 mol/l) was added to the same volume of Na 2 WO 4 aqueous ... patterning of the EC materials. Monodisperse particles are particularly expected to give sharp distributions of properties such as response time, precise controls of...

Ngày tải lên: 19/03/2014, 16:48

... 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 ... purification, decomposition of NO x and improvement of living conditions by removal of various pollutants, etc. [19–21]. In this paper, we also demonstrated the preparation of TiO 2 whis...

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. © ... report a novel strategy to s...

Ngày tải lên: 20/03/2014, 13:04

... Hydrothermal synthesis of tungsten oxide nanobelts Xuchun Song a, ⁎ , Yang Zhao b , Yifan Zheng c a Department of Chemistry, Fujian Normal University, ... Na 2 S and CTAB as assisted by a hydrothermal method at 180 °C. This strategy may offer an opportunity for the further investigation of some fundamental properties of 1D tungsten oxides and may ... TEM, (d) TEM images of WO...

Ngày tải lên: 20/03/2014, 13:04