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ZnO纳米棒水热法生长与表征

第37卷第4期 硅 酸 盐 通 报 Vol .37 No .42018年4月 BULLETIN OF THE CHINESE CERAMIC SOCIETY April ,2018

ZnO 纳米棒水热法生长与表征

夏冬林1,闫新政2,秦 可2,李云峰2

(1.武汉理工大学硅酸盐建筑材料国家重点实验室,武汉 430070;2.武汉理工大学材料科学与工程学院,武汉 430070)

摘要:采用两步法在FTO 导电玻璃衬底上制备ZnO 纳米棒,首先利用浸渍-提拉法在FTO 导电玻璃衬底上制备ZnO 晶种层,然后把有ZnO 晶种层的FTO 衬底放入盛有生长溶液的反应釜中利用水热法制备ZnO 纳米棒。研究了生长溶液的浓度、生长温度和生长时间对所制备的对ZnO 纳米棒阵列的微结构和光致发光性能的影响,利用X 射线衍射(XRD )、扫描电子显微镜(SEM )和光致发光谱(PL )研究了ZnO 样品的结构、形貌和光学性质。实验结果表明:所制备的ZnO 纳米棒呈现六方纤锌矿结构,沿(002)晶面择优取向生长,纳米棒的平均直径约为100nm ,长度约为2.5μm 。所制备的ZnO 纳米棒在390nm 附近具有很强的紫外发光峰和在550nm 附近有较弱的宽绿光发光峰。关键词:ZnO ;纳米棒;水热法;浸渍-提拉法;光致发光

中图分类号:O 482;TB 383 文献标识码:A 文章编号:1001-1625(2018)04-1132-07

Hydrothermal Growth and Characterization of ZnO Nanorods

XIA Dong -lin 1,YAN Xin -zheng 2,QIN Ke 2,LI Yun -feng 2

(1.State Key Laboratory of Silicate Materials for Architectures ,Wuhan University of Technology ,Wuhan 430070,China ;

2.School of Materials Science and Engineering ,Wuhan University of Technology ,Wuhan 430070,China )

Abstract :ZnO Nanorod arrays were grown on the FTO conductive glass by two steps method .First the seed layer of ZnO nano -particles was prepared on FTO glass by dip -coating method .Then ZnO nanorods were grown on the seed layer through hydrothermal method .The influence of hydrothermal growth parameters such as reactant concentration ,growth temperature and time on the microstructure and optical properties of ZnO nanorod arrays were investigated .The microstructure and optical properties of ZnO nanorod arrays were characterized by X -ray diffraction (XRD ),scanning electron microscope (SEM ),photoluminescence (PL )spectroscopy .The results show that the as -grown ZnO nanorod arrays are in shape of hexagonal columnar with wurtzite structure ,growth perpendicular to the FTO conductive glass ,

good orientation along the c -axis .The average diameter and the length of nanorods are about 100nm and

2.5μm ,respectively .The as -prepared ZnO nanorods have a strong UV emission peak near 390nm and a weak green emission peak near 550nm .Key words :ZnO ;nanorod ;hydrothermal method ;dip -coating method ;photoluminescence 基金项目:武汉市科技计划应用基础研究项目(2015010101010006)

作者简介:夏冬林(1964-),男,博士,副研究员.主要从事太阳能电池材料与器件方面的研究.1 引 言

氧化锌(ZnO )纳米材料由于具有独特的电学、光学和化学特性,目前在激光器、紫外探测器、发光二极管、气敏传感器、光催化和太阳能电池等方面具有潜在的应用前景

[1-8]。制备ZnO 纳米材料的方法主要包括气相法和液相法。气相法主要有气-液-固(VLS )法[9-11]和化学气相沉积(CVD )法[12-14]等,气相法是通过贵

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