Synthesis of high surface area nanometer magnesia by solid-state chemical reaction

GUAN Hongbo, WANG Pei, ZHAO Biying, ZHU Yuexiang, XIE Youchang

Front. Chem. China ›› 2007, Vol. 2 ›› Issue (2) : 204-208.

PDF(357 KB)
PDF(357 KB)
Front. Chem. China ›› 2007, Vol. 2 ›› Issue (2) : 204-208. DOI: 10.1007/s11458-007-0041-5

Synthesis of high surface area nanometer magnesia by solid-state chemical reaction

  • GUAN Hongbo, WANG Pei, ZHAO Biying, ZHU Yuexiang, XIE Youchang
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Abstract

Nanometer MgO samples with high surface area, small crystal size and mesoporous texture were synthesized by thermal decomposition of MgC2O4·2H2O prepared from solid-state chemical reaction between H2C2O4·2H2O and Mg (CH3COO)2·H2O. Steam produced during the decomposition process accelerated the sintering of MgO, and MgO with surface area as high as 412 m2·g-1 was obtained through calcining its precursor in flowing dry nitrogen at 520°C for 4 h. The samples were characterized by X-ray diffraction, N2 adsorption, transmission electron microscopy, thermogravimetry, and differential thermal analysis. The as-prepared MgO was composed of nanocrystals with a size of about 4-5 nm and formed a wormhole-like porous structure. The MgO also had good thermal stability, and its surface areas remained at 357 and 153 m2·g-1 after calcination at 600 and 800°C for 2 h, respectively. Compared with the MgO sample prepared by the precipitation method, MgO prepared by solid-state chemical reaction has uniform pore size distribution, surface area, and crystal size. The solid-state chemical method has the advantages of low cost, low pollution, and high yield, therefore it appears to be a promising method in the industrial manufacture of nanometer MgO.

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GUAN Hongbo, WANG Pei, ZHAO Biying, ZHU Yuexiang, XIE Youchang. Synthesis of high surface area nanometer magnesia by solid-state chemical reaction. Front. Chem. China, 2007, 2(2): 204‒208 https://doi.org/10.1007/s11458-007-0041-5
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