Solvent Effect on Structure, Morphology and Catalytic Activity on Ammonium Perchlorate of Nano-MgWO4.

For exploring the interesting solvent effect on structure and morphology, a variety of MgWO₄ nanoparticles were prepared by a one-pot solvothermal method with different proportional solvents of water and ethylene glycol. The results showed that monoclinic wolframite crystalline structure of MgWO₄ was successfully synthesized, corresponding to two standard cards of MgWO₄ (JCPDS No. 27-0789) and MgWO₄ (JCPDS No. 19-0776), respectively. The morphology of MgWO₄ nanoparticles presents eight different shapes and orderly transforms from one shape to another with increasing water content in mixed EG-water solvents, and a possible mechanism was proposed. The catalytic activities of these MgWO₄ nanoparticles on the thermal decomposition of Ammonium Perchlorate (AP) were compared using differential scanning calorimetry (DSC) method, and found to present good change rule with particle size. The present article encompasses the synthesis of MgWO₄ nanoparticles for thermal catalytic decomposition of Ammonium Perchlorate (AP). In the studied materials, MgWO₄ nanoparticles were prepared by a one-pot solvothermal method with different proportional solvents of water and ethylene glycol. Owing to the smaller particle size and larger specific surface area of MgWO₄ (sample 1#), MgWO₄ (sample 1#) prepared in pure EG has the best catalytic performance in the thermal decomposition process of AP. [ABSTRACT FROM AUTHOR]