氧化锌纳米棒的制备及其光电性能的研究

以硝酸锌Zn(NO3)2·6H2O和六次甲基四胺(HMT)为原料,通过水热法制备出氧化锌纳米棒,研究了反应时间和冷却时间对产物形貌和尺寸的影响.采用扫描电子显微镜(SEM)、X射线衍射(XRD)、光致发光谱(PL)、紫外-可见光谱、红外光谱(FT-IR)表征产物的结构和性能.结果表明,反应时间为6 h和急速冷却至室温条件下合成样品为六方纤锌矿氧化锌纳米棒,平均直径为300 nm;样品具有良好的结晶质量和发光性能,样品在200～400nm有较强的紫外吸收性能;FT-IR图谱表明产物在430 cm-1左右出现了Zn-O特征吸收峰,并有所红移;样品的开启场强为2.2 V/μm,场增强因子为2550,当场强为4.75 V/μm时,电流密度可以达到0.7 mA/cm2,是一种性能优良的冷阴极电子发射源.

Study on Preparation and Photoeletric Properties of ZnO Nanorods

ZnO nanorods were successfully prepared by hydrothermal method using zinc nitrate hexahydrate and hexamethylenetetramine as raw materials.The effects of growth and cooling time on the morphologies and sizes of final products were investigated.The resultant products were characterized by SEM,XRD,photoluminescence spectra,UV-Vis and FT-IR spectrum.XRD and SEM results show that the ZnO nanorods with hexagonal wurtzite structure have been synthetized with average diameter of 300 nm when the reaction time is set...