MSA  Vol.1 No.5 , November 2010
A Novel Synthesis of Nanostructured ZnO via Thermal Oxidation of Zn Nanowires Obtained by a Green Route
ABSTRACT
ZnO nanowires were synthesised in a green and novel, two-step process: (1) the production of Zn nanowires by carbo-thermal reduction of a mixture of ZnO/biopitch (Eucalyptus sp. tar pitch) at 900°C for 1 h in a quartz tube placed in an electric furnace in a N2 atmosphere and (2) the oxidation of the as-prepared Zn nanowires in air at 300°C for 3 h and 6 h and at 400°C for 3 h. The structural properties and phase compositions of the oxidised samples were studied by X-ray diffraction (XRD), and the morphologies were investigated by scanning electron microscopy (SEM). The XRD results demonstrated the formation of ZnO phase, as the main product. The oxidised products exhibited good crystallinity. Maximal conversion of the Zn nanowires into ZnO nanowires (99%) resulted from oxidation of the sample for 3 h in air at 300°C. The formation of ZnO was also confirmed by Fourier transform infrared (FTIR) spectroscopy.

Cite this paper
nullA. Maciel, W. Mussel and V. Pasa, "A Novel Synthesis of Nanostructured ZnO via Thermal Oxidation of Zn Nanowires Obtained by a Green Route," Materials Sciences and Applications, Vol. 1 No. 5, 2010, pp. 279-284. doi: 10.4236/msa.2010.15041.
References
[1]   T.-J. Hsueh and C.-L. Hsu, “Fabrication of Gas Sensing devices with ZnO Nanostructure by the Low-Temperature Oxidation of Zinc Particles,” Sensors and Actuators B: Chemical, Vol. 131, No. 2, 2008, pp. 572-576.

[2]   G. G. Rusu, M. Girtan and M. Rusu, “Preparation and Characterization of Thin Films Prepared by Thermal Oxidation of Evaporated Zn Thin Films,” Su-perlattices and Microstructures, Vol. 42, No. 1-6, 2007, pp. 116-122.

[3]   N. Bouhssira, S. Abed, E. Tomasella, J. Cellier, A. Mosbah, M. S. Aida and M. Jacquet, “Influence of Annealing Temperature on the Properties of ZnO Thin Films Deposited by Thermal Evaporation,” Applied Surface Science, Vol. 252, No. 15, 2006, pp. 5594-5597.

[4]   L. Z. Pei, H. S. Zhao, W. Tan, H. Y. Yu, Y. W. Chen and Q.-F. Zhang, “Single Crystalline ZnO Nanorods Grown by a Simple Hydrothermal Process,” Materials Chara- cterization, Vol. 60, No. 9, 2009, pp. 1063-1067.

[5]   G. Z. Wang, Y. Wang, M. Y. Yau, C. Y. To, C. J. Deng and D. H. L. Ng, “Synthesis of ZnO Hexagonal Columnar Pins by Chemical Vapor Deposition,” Materials Letters, Vol. 59, No. 29-30, 2005, pp. 3870-3875.

[6]   N. Han, P. Hu, A. Zuo, D. Zhang, Y. Tian and Y. Chen, “Photolumi-nescence Investigation on the Gas Sensing Property of ZnO Nanorods Prepared by Plasmaenhanced CVD Method,” Sensors and Actuators B: Chemical, Vol. 145, No. 1, 2010, pp. 114-119.

[7]   M. Biswas, E. McGlynn and M. O. Henry, “Carbothermal Reduction Growth of ZnO Nanostructures on Sapphire- Comparisons between Graphite and Activated Char-coal Powders,” Microelectronics Journal, Vol. 40, No. 1, 2009, pp. 259-261.

[8]   D. Yuvaraj and K. N. Rao, “Selective Growth of ZnO Nanoeedles by Thermal Oxidation of Zn Mi-crostruc- tures,” Materials Science and Engineering B, Vol. 164, No. 3, 2009, pp. 195-199.

[9]   H.-Q. Liang, L. Z. Pan and Z.-J. Liu, “Synthesis and Photoluminescence Properties of ZnO Nanowires and Nanorods by Thermal Oxidation of Zn Precur-sors,” Materials Letters, Vol. 62, No. 12-13, 2008, pp. 1797- 1800.

[10]   Z. H. Wang, D. Y. Geng and H. Z. D. Zhang, “Charac- terization and Optical Properties of ZnO Nanoparticles Obtained by Oxidation of ZnO Nanoparticles,” Materials Letters, Vol. 63, No. 29, 2009, pp. 2533-2535.

[11]   Z. W. Li, W. Gao and R. J. Reeves, “Zinc Oxide Films by Thermal Oxidation of Zinc Thin Films,” Surface and Coating Technology, Vol. 198, No. 1-3, 2005, pp. 319- 323.

[12]   W. Gao and Z. W. Li, “Photoluminescence Properties of ZnO Films Grown by Wet Oxidation: Effect of Processing,” Journal of Alloys and Compounds, Vol. 449, No. 1-2, 2008, pp. 202-206.

[13]   A. Khan and M. E. Kordesch, “Large-Scale Fabrication of Metallic Zn Nanowires by Thermal Evaporation,” Physica E, Vol. 33, No. 1, 2006, pp. 88-91.

[14]   J. V. D. S. Araújo, R. V. Ferreira, M. I. Yoshida and V. M. D. Pasa, “Zinc Nanowires Synthesized on a Large Scale by a Simple Carbothermal Process,” Solid State Sciences, Vol. 11, No. 9, 2009, pp. 1673-1679.

[15]   JCPDS-International Center for Diffraction Data. JCPDS- ICDD 2000.

[16]   Y. J. Kwon, K. H. Kim, C. S. Lim and K. B. Shim, “Characterization of ZnO Nanopowders Synthesized by the Polymerized Complex Method via an Or-ganochemical Route,” Journal of Ceramic Processing Research, Vol. 3, No. 3, 2002, pp. 146-149.

 
 
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