超声辅助均匀沉淀法由前躯体ZnS制备ZnO纳米颗粒及其表征

Preparation and characterization of ZnO Nanoparticles from precursor ZnS via Ultrasonic-Assisted homogeneous precipitation method

摘要:

通过在空气中热处理前躯体ZnS的方法制备了直径约为20-40nm的ZnO纳米颗粒。前躯体ZnS在超声辅助60℃的低温条件下，采用醋酸锌为锌源、硫代乙酰胺为硫源制备。所得产物分别采用红外光谱（FT-IR）、热重-差热分析(TGA-DTA)、X-射线衍射(XRD)、场发射扫描电镜(FE-SEM)、投射电镜(TEM)、电子能谱(EDS)和荧光光谱(PL)进行表征。实验结果表明所得产物ZnO为六方纤锌矿结构，且结晶性很好，并且随着超声时间的延长其粒径有所降低，室温PL光谱表明样品在400～550nm范围内有三个较强的荧光发射峰。

Abstract:

ZnO nanoparticles with an average size of about 20-40nm has been synthesized by thermal treatment of ZnS nanoparticles in an air atmosphere. The ZnS nanoparticles has been synthesized at a low temperature of 60℃ by using zinc acetate as a zinc source and TAA as a sulfur source with the aid of ultrasonic. The as-prepared products were characterized by Fourier transformed infrared spectra（FT-IR）, Thermal gravimetric analysis and differential thermal analysis（TGA-DTA）, X-ray diffraction study（XRD）, Field-emission scanning electron microscopy（FE-SEM）, Transmission electron microscopy(TEM), EDS and Photoluminescence (PL) spectra , respectively. The results have revealed that the ZnO nanoparticles are of hexagonal wurtzite structure, of high crystallinity and the size of the ZnO nanoparticles had an decreasing trend with the increment of the ultrasonic time. The room temperature PL spectra showed three strong emissions with peaks located in the range of 400～550nm.