棒状ZnO微米材料的水热法制备及表征研究

Research on Hydrothermal Preparation and Characterization of Rod-like ZnO Micro Materials

以二水乙酸锌为锌源、氢氧化钾为碱源,采用水热法制备得到棒状氧化锌(ZnO)微米材料。研究了Zn^(2+)/OH-物质的量比、水热温度和表面活性剂对产物晶相的影响,利用X射线衍射仪、扫描电子显微镜、傅里叶红外光谱仪等对ZnO微米材料进行表征。将棒状ZnO微米材料修饰到玻碳电极(GCE)上,利用电化学工作站,在三电极体系中测试了棒状ZnO/GCE分别在碱性环境和酸性环境中的循环伏安曲线。结果表明:棒状ZnO/GCE在KOH溶液中的循环伏安曲线有明显的氧化还原峰,但电化学稳定性较差;在H_(2)SO_(4)溶液中氧化还原峰不明显,但稳定性较好。

In this paper,rod-like zinc oxides(ZnO)micro materials are prepared by hydrothermal method of using zinc acetate dihydrate as zinc source and potassium hydroxide as alkali source.The effects of different Zn^(2+)/OH-species ratios,hydrothermal temperatures,and surfactant polyethylene glycol on the crystal phase of the products are studied.The as-prepared products are characterized by X-ray diffractometer(XRD),scanning electron microscope(SEM),and Fourier transform infrared spectroscopy(FT-IR)and so on.The results show that rod-like ZnO micro materials are modified on a glassy carbon electrode(GCE),and the cyclic voltammetry(CV)curves of rod-like ZnO/GCE in an alkaline environment and in an acidic environment are tested by using an electrochemical workstation in a three-electrode system.The CV curves in the KOH solution have obvious redox peaks,but the electrochemical stability is poor.In the H_(2)SO_(4)solution,the redox peaks are not obvious,but the stability is good.