Preparation of nanometer MgO by sol-gel auto-combustion

Abstract

Nanometer MgO was prepared via a sol-gel auto-combustion technique using magnesium nitrate as raw material and citric acid as chelating agent. IR spectra of the dried gel were used to investigate the structure of the precursors. By studying the different TG curves of magnesium citrate gel prepared by different methods, we found that a combustion process occurred and the nitrate ions acted as an oxidant in the combustion process. TEM photographs of synthesized powders from the sol-gel auto-combustion showed that the crystallites were uniform in size. In addition, the XRD pattern of this sample showed that the particle size was 8.9 nm. The BET curves, in turn, showed that the specific surface of the sample was 26.34 m²/g. The mechanism of the frothing process in restraining agglomeration is discussed.

References

1. Wang Shiin Xu Zuxun Fu Jin Synthesis of nano-materialBeijingChemical Industry Press 2002 97
2. Yue Zhenxing Zhou Ji Zhang Hongguo Gui Zhilun Li Longtu Auto-combustion behavior of nitrate-citrategel and synthesis of ferrite nano-particlesJournal of The Chinese Ceramic Society 1999 27(4)466470 (in Chinese)
3. Yang Wu Qi Youli Ma Yongjun Li Xien Guo Xiaojun Gao Jinzhang Chen Miao Synthesis of Nd₂O₃ nanopowders by sol-gel auto-combustionand their catalytic esterification activity.Materials Chemistry and Physics 2004 (84)5257. doi:10.1016/j.matchemphys.2003.09.042
4. Ning Yongcheng Structural Identification of Organical Compounds and Organical SpectroscopyBeijingSciencePress 2000 493
5. Mali A Ataie A Influence of the nitrates tocitric acid molar ratio on the combustion process and the phase constitutionof barium hexaferrite particles prepared by sol-gel combustion methodCeramics International 2004 (30)19791983
6. Julien C Michael S S Ziolkiewicz S Structural and electrochemical properties of LiNi_0.3Co_0.7O₂ synthesized bydifferent low-temperature techniquesInternationalJournal of Inorganic Materials 1999 2937
7. Yue Zhenxing Guo Wenyu Zhou Ji Gui Zhilun Li Longtu Synthesis of nanocrystilline ferrites bysol-gel combustion process: the influence of PH value of solutionJournal of Magnetic Materials 2004 (270)216223
8. Chen Zilin Chao Zisheng Wan Huilin Synthesis of nanosized Alumina by Frothing MethodChinese Journal of Applied Chemistry 2002 19(11)10321036 (in Chinese)
9. Li Ling Surfactants and nanometer technologyBeijingChemical Industry Press 2004 145
10. Yan Qingzhi Su X T Zhou Y P Ge C C Controlledsynthesis of TiO₂ nanometer powders by sol-gelauto-igniting process and there structural propertyActa Phys Chimsin 2005 21(1)5762