Study of Preparation of Nano Nd_xCo_2-xZr₂O₇ and its Catalytic Properties on Ammonium Perchlorate Thermal Decomposition

Abstract:

Cubic pyrochlore type Nd_xCo_2-xZr₂O₇ nano-crystals were prepared by salt-assistant glycine solution combustion method (SGCM), with neodymium nitrate, cobalt nitrate and zirconium nitrate as raw materials, glycine as the incendiary agent, and KCl as a reaction inert salt. The Nd_xCo_2-xZr₂O₇ nano-crystals were characterized by means of XRD (X-ray powder diffraction), FT-IR (Fourier trans- form-infrared spectroscopy), Raman spectroscopy, TEM (Transmission electron microscope) and HRTEM (High resolution transmission electron microscopy). The results showed that neodymium ions were partially substituted by cobalt ions, while maintaining the original pyrochlore structure. The nano particles obtained had a perfect crystal structure, good dispersion, and the size was about 31nm. For Nd_1.9Co_0.1Zr₂O₇ nanocrystals, the four strong diffraction peaks were at 2θ=29.18°, 33.80°, 48.49° and 57.53°. The corresponding crystal plane distances calculated by Bragg equation λ=2dSinθ were 0.306, 0.265, 0.188 and 0.160 nm. Study the catalyst effect of Nd_xCo_2-xZr₂O₇ on the thermal decomposition of ammonium perchlorate (AP) using DSC (Differential scanning calorimetry). The results showed that nano Nd_xCo_2-xZr₂O₇ had high catalytic activity during on the thermal decomposition of ammonium perchlorate. With 2% more nano Nd_xCo_2-xZr₂O₇, the peak temperature of AP thermal decomposition reaction dropped by nearly 88°C. The apparent decomposition reaction heat increased from 655J•g^-1 to 1073J•g^-1. The results showed that the catalytic effect of thermal decomposition of AP with nano cobalt-doped zirconium acid neodymium is better than the single component of nano-metal oxides and undoped zirconate neodymium nanocrystals.

• Periodical: Advanced Materials Research (Volumes 602-604)
• Pages: 178-182
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.602-604.178
• Online since: December 2012
• Authors: Yun Shan Bai, Jian Ping Zeng, Lu De Lu, Jian Chun Bao
• Keywords: Ammonium Perchlorate (AP), Catalysis, Nd_xCo_2-xZr₂O₇, Soft Chemistry, Thermal Decomposition

References

[1] M. Uno, A. Kosuga, M. Okui, K. Horisaka, H. Muta, K. Kurosaki and S. Yamanaka: J. Alloys Compd. Vol. 420 (2006), p.291.

DOI: 10.1016/j.jallcom.2005.10.072

[2] Y.P. Tong, J.W. Zhu, L.D. Lu, X. Wang and X.J. Yang: J. Alloys Compd. Vol. 465 (2008), p.280.

[3] Y.P. Tong, L.D. Lu, X.J. Yang and X. Wang: Solid State Sci. Vol. 10 (2008), p.1379.

[4] Y.P. Tong, Y.P. Wang, Z.X. Yu, X. Wang, X.J. Yang and L.D. Lu: Mater. Lett. Vol.62 (2008), p.889.

[5] L. Gerward, J. Z. Jiang, J. S. Olsen, J. M. Recio and A. Waskowska: J. Alloys Compd. Vol. 401 (2005), p.11.

[6] D.V. Survase, M. Gupta and S.N. Asthana: Prog. Cryst. Growth Ch. Vol. 45(2002), p.61.

[7] Y. P. Wang, J.W. Zhu and L.D. Lu: Thermochim. Acta. Vol. 443(2006), p.234.

[8] A.A. Said and R.A. Qasmi: Thermochim. Acta. Vol. 275(1) (1996), p.83.

[9] J.W. Zhu, W.G. Zhang, Z. Wang, X.J. Yang, L.D. Lu and X. Wang: Chin. J. Inorg. Chem. Vol. 20 (2004), p.863.

[10] M. A. Subramanian, G. Aravamudan and G. V. Subba Rao: Prog. Solid St. Chem. Vol. 15(1983), p.55.