溶胶-凝胶法制备Mg_xZn_(1-x)O纳米材料

SOL-GEL SYNTHESIS OF Mg_XZn_(1-X)O NANOMETER MATERIAL

以硝酸锌(Zn(NO3)·26H2O)、柠檬酸(C6H8O·7H2O)为主要原料,采用改进的溶胶-凝胶法合成了纳米ZnO。在此基础上,添加硝酸镁(Mg(NO3)·26H2O)合成了MgxZn1-xO。利用X-射线衍射(XRD)、扫描电子显微镜(SEM)表征分析了煅烧温度和Mg掺杂量对产物的相组成及显微形貌的影响。结果表明,x≤10at%时,MgxZn1-xO属于六方纤锌矿结构,当x≥20at%时,MgxZn1-xO中除了具有属于六方纤锌矿结构的ZnO以外还有属于NaCl结构的MgO晶相存在。随煅烧温度的升高,MgxZn1-xO纳米颗粒逐渐长大。

Nanometer ZnO particles were prepared through the improved sol-gel method with Zn （NO3）2·6H2O and C6H8O7· H2O as main raw materials.MgxZn1-xO was further fabricated by adding Mg（NO3）2·6H2O in the above raw materials. The effect of calcination temperature and Mg content on phase composition and microstructure of the product was characterized by means of X-ray diffraction （XRD） and scanning electronic microscope （SEM）. It was indicated that when x≤ 10at%, MgxZn1-xO was hexagonal wurtzite structure; while x ≥20at%, MgxZn1-xO was in a mixture form of hexagonal wurtzite structure and MgO phase of NaCl structure. With the calcination temperature increasing, the size of nanometer MgxZn1-xO particles increased.