室温固相法合成ZnO纳米棒及其光学特性

Synthesis of zinc oxide nanorods by one step solid state reaction and their optical properties

在氯化钠存在下，以硫酸锌和氢氧化钠为原料，采用一步室温固相法制备了纳米氧化锌。XRD、TEM分析结果表明：所得纳米氧化锌为棒状，直径约10nm左右，长度约100～160nm。利用紫外一可见分光光度计测试了光吸收性能，发现ZnO纳米棒对200～380nm波长范围的光有很强吸收性，在可见光范围内，也有较强的吸收。ZnO纳米棒在550nm左右具有较弱的荧光发光峰且ZnO纳米棒较普通氧化锌发光峰波长发生了明显的红移。

ZnO nanorods were successfully prepared by one step solid state reaction of zinc sulfate and sodium hydroxide in the presence of sodium chloride. The powder X - ray diffraction （XRD） and the transmission electron microscopy （TEM） tests indicate that the product is pure hexagonal phase zinc oxide nanorods with diameter 10nm and length （100 -160）nm. The UV absorption properties were tested by the UV spectr ophotometer. The results show that ZnO nanorods have an extremely strong absorption at 200 - 380 nm wavelength and also a relatively strong absorption in visible region, and a wide blue - green light emission peak at 460 -610nm at room temperature, which can be attributed to the recombination of a photogenerated hole with singly ionized oxygen vacancy.