水热法合成Mn_xZn_(1-x)O微晶体(英文)

Hydrothermal Synthesis of Mn_xZn_(1-x)O Microcrystal

本文采用水热法合成了MnxZn1 xO晶体 ,水热反应条件为 3mol·L-1KOH作为矿化剂 ,填充度为 35 % ,温度为4 30℃ ,在Zn(OH) 2 中添加一定量的MnO2 为前驱物 ,反应时间为 2 4h。通过X射线能谱仪测量了晶体中的Mn含量 ,随着前驱物中MnO2 含量的增加 ,晶体中Mn的原子百分比随着增加 ,Mn最大原子百分比含量超过了 2 % ,晶体的形貌具有纯ZnO晶体的六角柱形特征。显露柱面m{ 10 10 }、锥面p{ 10 11}、负极面O面 { 0 0 0 1}和正极面 { 0 0 0 1}。晶体直径为 5 0～ 2 0 0 μm ,高度为 2 0～ 10 0 μm。

Mn_xZn_(1-x)O crystal was synthesized by hydrothermal method in this work. The experimental parameters for hydrothermal synthesis were: mineralizer concentration 3mol·L^(-1)KOH, the fill factor 35%, temperature 430℃, Zn(OH)_2 doped with MnO_2 used as precursor, and the reaction time 24 hours. The Mn concentration in crystal was determined by X-ray EDS. The atomic percentage of Mn in crystal increases as the concentration of MnO_2 in precursor increased. The maximum atomic percentage for Mn is over 2%. The morphology shows characteristics of hexagonal prism of pure ZnO crystal. The exposed faces are hexagonal faces m｛1010｝, hexagonal cone faces p｛1011｝, negative polar faces ｛0001｝and positive polar faces｛0001｝. The diameters of the crystals are 50-200μm,the heights are 20-100μm。