高频热等离子体气相合成一维纳米氧化锌研究

Vapor Phase Synthesis of One-dimensional Nano ZnO Using High Frequency and Atmospheric Pressure Thermal Plasma

把锌粉原料加入到高频常压热等离子体弧中,使锌粉加热气化,然后与加入等离子体反应器中的氧气反应,合成出了直径为50nm、长度超过2μm的一维棒状纳米氧化锌。研究了氧分压和锌粉加料速度对合成产物形貌的影响,结果表明,通过控制这些参数,可以调控合成的氧化锌纳米棒长径比。采用XRD、SEM、TEM和HRTEM对产物的形貌和结构进行了表征,并表征了合成的氧化锌纳米棒的光致发光性能。

One dimensional nano ZnO is synthesized using a high frequency and atmospheric pressure thermal plasma with Zn powders as starting material. In the plasma torch, Zn powders are first heated to vapor at high temperature, and react with added oxygen during cooling to form one dimensional nano-ZnO. The synthesized ZnO nanorods in diameter -50nm and length -2μm are uniform. The effects of oxygen partial pressure and Zn feed speed on the produced ZnO are studied. It is found that the length-diameter ratio of ZnO nanorods can be tuned by controlling these parameters. XRD, SEM, TEM and HRTEM are used to characterize the morphology and structure of synthesized ZnO, and the optical properties of synthesized ZnO are characterized using luminescence spectrophotometer as well.