Co掺杂ZnAl_2O_4纳米颗粒的制备与光学性质  

Preparation and Optical Properties of Co Doped ZnAl_2O_4 Nanoparticles

作　　者：武晓娟[1] 魏智强[1,2] 陈秀娟[1,3] 冯旺军[2] 杨华[1,2] 姜金龙[1,2] 元丽华[2] Wu Xiaojuan;Wei Zhiqiang;Chen Xiujuan;Feng Wangjun;Yang Hua;Jiang Jinlong;Yuan Lihua(State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China;School of Sciences, Lanzhou University of Technology, Lanzhou 730050, China;School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, China)

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050 [2]兰州理工大学理学院,甘肃兰州730050 [3]兰州理工大学机电工程学院,甘肃兰州730050

出　　处：《稀有金属材料与工程》2018年第4期1302-1307,共6页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51261015);甘肃省自然科学基金(1308RJZA238)

摘　　要：以十六烷基三甲基溴化铵(CTAB)为表面活性剂,采用水热法成功制备了不同掺杂比例的Zn_(1-x)Co_xAl_2O_4(x=0,0.20,0.40和0.60)纳米晶。并对样品的晶体结构、形貌、化学成分、价态和光学性能进行表征。实验结果表明,本方法所制备的不同掺杂浓度的Zn_(1-x)Co_xAl_2O_4纳米颗粒为尖晶石结构,晶化程度良好。根据XRD数据计算了晶胞参数a、晶格间距d_(hkl)、晶粒尺寸D,随着掺杂Co离子浓度的增加,均表现为减小趋势。XPS能谱显示大多数Co离子占据四面体中心位置,但有少量的Co离子占据八面体中心位置。随着掺杂Co离子浓度的增加,紫外吸收光的强度逐渐增加。Zn1-xCoxAl2O4（x=0, 0.20, 0.40 and 0.60） nanocrystals were prepared via a hydrothermal method using CTAB as surface active agent. The crystal structure, morphology, chemical composition, valence state and optical properties of the samples were investigated. The results show that the samples are of single phase spinel structure with good crystallization. According to the XRD data, the value of the crystal cell parameters, lattice spacing dhkl and grain size D were calculated, which indicate a decrease trend with the increase of doping concentration of Co ions. The XPS results clearly show that the Co ions mainly occupy the tetrahedral site and a small amount of Co ions occupy octahedral center position. With the increasing of Co ions concentration, the ultraviolet absorption intensity gradually increases.

关 键 词：掺杂 ZNAL2O4 水热法 晶体结构 光学性能 

分 类 号：O472.3[理学—半导体物理] O472.5[理学—物理]