Investigation of catalytic activity of ZnAl2O4 and ZnMn2O4 nanoparticles in the thermal decomposition of ammonium perchlorate
- 274 Downloads
ZnAl2O4 and ZnMn2O4 nanoparticles were synthesized by a modified co-precipitation method and characterized by means of Fourier transform infrared spectroscopy, X-ray diffraction, energy-dispersion X-ray spectrometer, and their morphology investigated by means of scanning electron microscopy. The effects of these nanoparticles on the thermal decomposition of ammonium perchlorate (AP) were examined by differential scanning calorimetery and thermogravimetery analyses. The results revealed that ZnAl2O4 nanoparticles have little catalytic effect on this process, but ZnMn2O4 nanoparticles have good catalytic effect on decreasing the decomposition temperature of AP and increasing the released heat. ZnAl2O4 and ZnMn2O4 nanoparticles increased the released heat of AP decomposition from 400 to about 736 and 1130 Jg−1, respectively, and AP decomposition temperature decreased from 420 to 400 and 358 °C in the same order. The higher catalytic activity of ZnMn2O4 can be due to its p-type semiconductivity and the presence of some positive hole and defects. Also, the kinetic parameters such as pre-exponential factor and activation energy were calculated using Kissinger method.
KeywordsCo-precipitation ZnAl2O4 and ZnMn2O4 nanoparticles Ammonium perchlorate Spinel Thermal decomposition Catalytic effect
We gratefully acknowledge a financial support from the research council of University of Mazandaran.
- 10.Zhao S, Ma D. Preparation of CoFe2O4 nanocrystallites by solvothermal process and its catalytic activity on the thermal decomposition of ammonium perchlorate. J Nanomater. 2010;2010:48.Google Scholar
- 18.Wrzyszcz J, Zawadzki M, Trzeciak AM, Ziólkowski JJ. Metal-support effects of platinum supported on zinc aluminate. Vaccum. 2002;189(2):203–10.Google Scholar
- 25.Choi SH, Kang YC. Characteristics of ZnMn2O4 nanopowders prepared by flame spray pyrolysis for use as anode material in lithium ion batteries. Int J Electrochem Sci. 2013;8:6281.Google Scholar
- 30.Mcarthur TL, Hutchison T, McKannan J, Cassingham CV, Co-precipitation method. U.S. Patent Application. 2013, 14/384,130.Google Scholar
- 31.Harvey D. Modern Analytical Chemistry. New York: McGraw-Hill; 2000.Google Scholar
- 33.Cullity BD, Stock SR. Elements of X-Ray Diffraction. 3rd ed. Upper Saddle River: Prentice-Hall Inc.; 2001.Google Scholar
- 40.Zhang P, Li X, Zhao Q, Liu S. Synthesis and optical property of one-dimensional spinel ZnMn2O4 nanorods. Nanoscale Res Lett. 2011;6(1):1–8.Google Scholar
- 41.Rui SO, Hong-jun WA, Shou-hua FE. Solvothermal Preparation of Mn3O4 Nanoparticles and Effect of Temperature on Particle Size. Chem Res Chin Univ. 2012;28(4):577–80.Google Scholar