共查询到10条相似文献,搜索用时 109 毫秒
1.
Faouzi Achouri Serge Corbel Abdelhay Aboulaich Lavinia Balan Ahmed Ghrabi Myriam Ben Said Raphaël Schneider 《Journal of Physics and Chemistry of Solids》2014
We report a facile synthesis of ZnO/Fe2O3 heterostructures based on the hydrolysis of FeCl3 in the presence of ZnO nanoparticles. The material structure, composition, and its optical properties have been examined by means of transmission electron microscopy, scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and diffuse reflectance UV–visible spectroscopy. Results obtained show that 2.9 nm-sized Fe2O3 nanoparticles produced assemble with ZnO to form ZnO/Fe2O3 heterostructures. We have evaluated the photodegradation performances of ZnO/Fe2O3 materials using salicylic acid under UV-light. ZnO/Fe2O3 heterostructures exhibited enhanced photocatalytic capabilities than commercial ZnO due to the effective electron/hole separation at the interfaces of ZnO/Fe2O3 allowing the enhanced hydroxyl and superoxide radicals production from the heterostructure. 相似文献
2.
H.W. Kim J.H. Myung S.H. Shim C. Lee 《Applied Physics A: Materials Science & Processing》2006,84(1-2):187-189
We have successfully grown the rod-like structures of bismuth oxide (Bi2O3) on silicon substrate by a reaction of a trimethylbismuth (TMBi) and oxygen (O2) mixture without using any catalyst. We have characterized the samples by means of X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The products consisted of bundles of rod-like structures. The Bi2O3 rods were of monoclinic structure. PACS 81.07.-b; 81.15.Gh 相似文献
3.
Yun-long ZhaoHong-xia Lu Xiu-jun YuBing-bing Fan De-liang ChenLi-wei Zhang Hai-long WangDao-yuan Yang Hong-liang XuRui Zhang 《Applied Surface Science》2011,257(24):10634-10638
Core-shell structured ZnO/In2O3 composites were successfully synthesized via situ growth method. Phase structure, morphology, microstructure and property of the products were investigated by X-ray diffraction (XRD), TG-DTA, field emission scanning electron microscopy (FESEM), energy-dispersive spectrometry (EDS), transmission electron microscope (TEM) and photoluminescence (PL). Results show that the core-shell structures consist of spindle-like ZnO with about 800 nm in length and 200 nm in diameter, and In2O3 particles with a diameter of 50 nm coated on the surface of ZnO uniformly. HMTA plays an important role in the formation of core-shell structures and the addition of In2O3 has a great effect on PL spectrum. Possible mechanism for the formation of core-shell structures is also proposed in this paper. 相似文献
4.
Muzafar A. Kanjwal Faheem A. SheikhNasser A.M. Barakat Ioannis S. Chronakis Hak Yong Kim 《Applied Surface Science》2011,257(18):7975-7981
A new hierarchical nanostructure that consists of cobalt oxide (Co3O4) and zinc oxide (ZnO) was produced by the electrospinning process followed by a hydrothermal technique. First, electrospinning of a colloidal solution that consisted of zinc nanoparticles, cobalt acetate tetrahydrate and poly(vinyl alcohol) was performed to produce polymeric nanofibers embedding solid nanoparticles. Calcination of the obtained electrospun nanofiber mats in air at 600 °C for 1 h, produced Co3O4 nanofibers with rough surfaces containing ZnO nanoparticles (i.e., ZnO-doped Co3O4 nanofibers). The rough surfaced nanofibers, containing ZnO nanoparticles (ZnNPs), were then exploited as seeds to produce ZnO nanobranches using a specific hydrothermal technique. Scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were employed to characterize the as-spun nanofibers and the calcined product. X-ray powder diffractometery (XRD) analysis was used to study the chemical composition and the crystallographic structure. 相似文献
5.
Hai Wang Yong Liu Ming Li Hong Huang Hongmei Xu Hui Shen 《Applied Physics A: Materials Science & Processing》2011,103(2):463-466
A novel three-dimensional (3D) hierarchical structured ZnO was prepared on TiO2 nanoparticles film by electrodeposition process from aqueous ZnCl2 solution. The hierarchical structured ZnO was observed by scanning electron microscopy. The results showed that the deposition
time had an obvious effect on the morphology of the ZnO structures. Accordingly, a possible growth mechanism was proposed.
Furthermore, the room-temperature optical properties of hierarchical structured ZnO were investigated by photoluminescence
spectrum, indicating that a strong green emission peak centered at 542 nm. 相似文献
6.
Li ZhangYoshio Hashimoto Toshinori TaishiIsao Nakamura Qing-Qing Ni 《Applied Surface Science》2011,257(15):6577-6582
A novel flower-shaped Bi2O3 superstructure has been successfully synthesized by calcination of the precursor, which was prepared via a citric acid assisted hydrothermal process. The precursor and Bi2O3 were characterized with respect to morphology, crystal structure and elemental chemical state by field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). It was shown that both the precursor and Bi2O3 flower-shaped superstructure were constructed of numerous nanosheets while the nanosheets consisted of a great deal of nanoparticles. Furthermore, key factors for the formation of the superstructures have been proposed; a mechanism for the growth of the superstructure has been presented based on the FESEM investigation of different growth stages. 相似文献
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8.
I. V. Babkina K. S. Gabriel’s T. I. Epryntseva O. V. Zhilova V. A. Makagonov A. V. Sitnikov P. M. Hlopovskikh 《Bulletin of the Russian Academy of Sciences: Physics》2016,80(9):1168-1171
The effect heat treatment has on the electrotransport mechanisms in films of ZnO and In2O3, and in a multilayer (In2O3/ZnO)83 structure obtained via ion-beam sputtering, is studied. It is shown that there is a mechanism of weak electron localization in the In2O3 and (In2O3/ZnO)83 samples. The relaxation processes that occur during the heat treatment of In2O3 films are found to increase the length of elastic electron scattering, but to reduce this parameter in multilayer heterostructures. 相似文献
9.
We have demonstrated the synthesis of one-dimensional (1D) structures of bismuth oxide (Bi2O3) by a reaction of a trimethylbismuth (TMBi) and oxygen (O2) mixture at 450 °C. Scanning electron microscopy showed that the product consisted of 1D materials with width or diameters less than 1 μm and lengths up to several tens of micrometers. The X-ray energy dispersive spectroscopy revealed that the materials contained elements of Bi and O. The results of X-ray diffraction and selected area electron diffraction pattern indicated that the obtained Bi2O3 were crystalline with monoclinic structure. 相似文献