氧化锌纳米材料的合成、结构表征、光学及催化性能

Zinc Oxide Nano-materials Synthesis,Structural Characterization,Optical and Catalytic Properties

以Zn(Ac)2.2H2O和NaOH为原料,十六烷基三甲基溴化胺(CTAB)为表面活性剂,采用水热法合成了不同形态的氧化锌。利用X-ray粉末衍射仪(Powder X-ray Diffractometer,XRD)、红外光谱仪(Infra-red Spectrometer,IR)、场发射扫描电镜表征所合成材料的结构和形貌。用紫外可见光度计、荧光光度计研究了氧化锌的光学性能。为了评估氧化锌的催化性能,进行了纳米氧化锌对乙酸和正丁醇合成乙酸正丁酯的催化实验。实验结果表明,纳米氧化锌对酯化反应具有很好的催化作用,催化活性与颗粒大小有一定的关系。

The different forms of zinc and NaOH as reaction precursors and hydrothermal method. The resultant （ XRD）, Infrared Spectrometer （IR） oxide nanomaterials were synthesized by using Zn（ AC）2 · 2H2O cetyl lycine brominated ammonium （CTAB） for surfactant with the samples were characterized with X-ray diffraction diffractometer and field emission scanning electron microscope. The optical properties of obtained ZnO nanomaterials with different shapes were recorded by photometric Uv-vis and PL, indicating the extstence of crystalline defects. In order to evaluate the performance of ZnO catalyst, nanometer ZnO with various morphologies were used as catalyst for esterification reaction of acetic acid and n-butyl alcohol via a refluxing method. On the base of catalytically experiments, the nanometer ZnO on the esterification reaction was found very good catalytic behavior with transition rate up to 85.79%. Mean- while, the morphologies of resultant ZnO nanomaterials have an effect on the transition rate of acetic acid and n-butyl alcohol esterification due to their different surface areas.