类沸石咪唑酯骨架材料(ZIFs)是由过渡金属原子(Co/Zn)与咪唑或咪唑衍生物连接而成的一类新型、具有拓扑的纳米多孔材料,是金属有机骨架材料的一种。而ZIF-8是ZIFs材料中最具代表性的一种。本实验采用醇热法制备ZIF-8,研究Co∶Zn摩尔比、活性红初始浓度等条件对光催化活性的影响,利用红外光谱、扫描电镜和X-射线粉末衍射表征ZIF-8的形貌和结构性能。光催化实验表明,当n(Co∶Zn)=2∶3时,ZIF-8对活性红的降解率达到最大值,为95.10%。采用一级动力学方程拟合ZIF-8对活性红的降解动力学过程,拟合因子(R2)均大于0.97,说明一级动力学方程适合于ZIF-8对活性红的光催化降解动力学反应。
Zeolitic imidazolate framworks (ZIFs) are new subclass of metal-organic frameworks (MOFs) comprised of ordered networks which are formed by imidazole or imidazole derivatives and inorganic transition metal cations (Co/Zn).The ZIF-8 framework is one of the most representative ZIFs materials.In this experiment,ZIF-8 was prepared by alcohol-thermal method,and investigated the effect of the molar ration of Co∶Zn,initial concentration of reactive red on the photocatalytic activity of ZIF-8.The structure and morphology of ZIF-8 were characterized by infrared spectroscopy,scanning electron microscopy and X-rad power diffraction.The photocatalytic experimental results showed that the degradation rate of the reactive red for ZIF-8 reached a maximum of 95.10%,when n(Co∶Zn)=2∶3.The first-order kinetic equation was used to fit the degradation kinetics of the reactive red with the fitting factor R2 all greater than 0.97,indicating that the first-order kinetic equation was suitable for the photocatalytic degradation kinetic reaction of the reactive red for ZIF-8.
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基金资助
国家自然科学基金(51406141);福建省自然科学基金(2019J01829、2019J01830、2020J01412、2020J01414);南平市基金(2019J06)
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