Preparation of SiO2 Encapsulated ZnO Nanopowders by Sol-Gel Method

Abstract:

Article Preview

The shell-core structures of SiO2/ZnO nanopowders were obtained by simple two-step technique based on low-temperature crystallization from liquid phase. The influence of molar ratio of SiO2/ZnO in the reaction mixture on the morphology of obtained SiO2/ZnO nanopowders was studied. Crystalline structure of SiO2/ZnO nanocrystals obtained was proofed by the X-ray diffraction data. The average diameter of SiO2/ZnO nanocrystals was about 80~100nm according to FSEM and TEM data. It is shown that SiO2 components on the surface prevent the thermal interfusion of ZnO particles. Morphology and diameter of raw ZnO, SiO2/ZnO nanopowders prepared with molar ratio of SiO2/ZnO 0.1, 0.2, and 0.5 were almost same. When molar ratio of SiO2/ZnO was 0.5, ZnO core was coated with SiO2, and the thickness of shell was about 10nm. At the same time, SiO2 nanocrystals also formed the islands structure.

Info:

Periodical:

Edited by:

Cheng Zhang and Jin Hu

Pages:

13-16

DOI:

10.4028/www.scientific.net/AMR.412.13

Citation:

Y. X. Wang et al., "Preparation of SiO2 Encapsulated ZnO Nanopowders by Sol-Gel Method", Advanced Materials Research, Vol. 412, pp. 13-16, 2012

Online since:

November 2011

Export:

Price:

$38.00

[1] Q.F. Zhang, C.S. Dandeneau, X.Y. Zhou and G. Z Cao: Adv. Mater. Vol. 21 (2009), p.1.

[2] R. Katoh, A. Furube, T. Yoshihara, et al.: J. Phys. Chem. B Vol. 108 (2004), p.4.

[3] N. A. Anderson, X. Ai, and T. Lian: J. Phys. Chem. B Vol. 107 (2003), p.4414.

[4] H. Horiuchi, R. Katoh, K. Hara, et al.: J. Phys. Chem. B. Vol. 107 (2003), p.570.

[5] C. Bauer, G. Boschloo, E. Mukhtar, and A. Hagfeldt: J. Phys. Chem. B Vol. 105 (2001), p.5585.

[6] M. Law, L.E. Greene, A. Radenovic, et al.: J. Phys. Chem. B Vol. 110 (2006), p.22652.

[7] Y.J. Shin, J.H. Lee, J.H. Park, and N.G. Park: Chem. Lett. Vol. 36 (2007), p.1505.

In order to see related information, you need to Login.