中文摘要：

用乙醇和水的混合溶剂热法合成氢氧化镁纳米材料，并用透射电镜（TEM）和X射线衍射（XRD）表征其形貌和结构，同时考察了镁源、温度、反应时间、反应物浓度和溶剂热体系对氢氧化镁纳米材料形貌的影响，探索其生长机理。镁源通过改变氢氧化镁纳米粒子的结晶习性从而影响形貌．温度和反应时间受热力学和动力学的控制使氢氧化镁纳米材料的生长从六个等价面的取向生长向各向同性生长转变，从而导致形貌由六边形片状结构向圆形变化，反应物浓度和溶剂热体系影响成核快慢，从而影响氢氧化镁纳米材料的晶型。

英文摘要：

The solvothermal synthesis and morphology control of nano-scaled magnesium hydroxide are reported. The impacts of a variety of factors, such as magnesium source, temperature, reaction time, concentration and solvent thermal system on the morphologies and crystal structure of Mg（OH）2 are studied in detail. The mechanism of crystal growth is also explored. TEM and XRD results indicate that magnesium source with different anions could affect the morphology because of the polarity. Temperature, reaction time, concentration and solution system could result in the hexagon- and round- shaped nanosheets due to the kinetic and thermodynamic control, respectively, thus tuning the size of nanosheets.