Mg(OH)_2纳米片的制备与表征

Preparation and Characterization of Mg(OH)_2 Nanosheets

以对硝基偶氮间苯二酚为表面修饰剂,将硫酸镁溶液与氢氧化钠溶液在80℃下直接反应,制备出片状的纳米氢氧化镁。所得样品用XRD,TEM和SEM等技术进行表征,考察了实验条件对样品形貌的影响。结果表明,氢氧化镁纳米片的直径为100~200nm、厚度15 nm左右,比表面积129 m2.g-1。初步讨论了Mg（OH）2片状纳米晶的生长机理。

Mg（OH）2 nanosheets with size of 100~200 nm and thickness of 15 nm were prepared from the precipitation reaction between MgSO4 and NaOH at 80 ℃ using 4-（p- nitrophenylazo） resorcinol （NPR） as surface modifier. The products were characterized using XRD, TEM, and SEM. The influence of various experimental parameters on the morphologies of Mg（OH）2 nanosheets were investigated. The specific surface area was determined to be 129 m2 ·g^-1. Possible growth mechanism of Mg（OH）2 nanosheets was discussed.