直接水解法制备纳米MoO_3

Synthesis of Nano-sized MoO_3 via the Direct Hydrolyzing of Ammonium Heptamolybdate

实验以仲钼酸铵为钼源,不需要模板剂,不加酸进行酸化,而是在室温(15℃)下使仲钼酸铵溶液直接水解,水解的胶状物经洗涤、干燥、焙烧,得到白色微粉。利用粉末X-射线衍射仪分析样品的晶型结构、环境扫描电子显微镜观察样品的微观形貌,表明所制样品为不同晶型的纳米级三氧化钼。考察了焙烧温度对制备三氧化钼的晶型和形貌的影响,为更好地制备纳米三氧化钼提供实验依据。

The hydrolyzing of ammonium heptamolybdate in pure water under ambient conditions was investigated to prepare nano-sized MoO3. After drying and calcining the gel-like precipitate, XRD results indicate that nano-sizcd MoO3 was formed, in which the crystal structures are dependent on the calcination temperatures. The morphology of the MoO3 powder was observed with SEM, which different agglomerated forms of MoO3 were found depending on the calcination temperatures.