FeY型分子筛的高效制备及非均相Fenton催化降解性能

High Efficiency Synthesis of FeY Type Zeolite and Its Heterogeneous Fenton Catalytic Degradation

改进传统水热合成法,以湿凝胶晶化法高效制备了具有FAU结构的含铁Y型分子筛.采用X射线衍射(XRD)、扫描电子显微镜(SEM)、紫外-可见吸收光谱(UV-Vis)、电感耦合等离子体发射光谱(ICP)和X射线光电子能谱(XPS)等方法对产物结构、形貌及组成等进行了表征,并与传统水热合成法及离子交换法制备的含铁Y型分子筛进行了比较.将该分子筛作为催化剂构建了非均相Fenton体系,该体系对亚甲基蓝染料具有良好的催化降解性能,考察了溶液初始pH值、H_2O_2用量以及催化剂用量等因素对Fenton催化性能的影响,并研究了催化剂的循环再生性能.

Iron containing zeolite with FAU structure was synthesized via the wet-gel crystallization method to improve the traditional hydrothermal synthesis of zeolites.X-ray diffraction(XRD),scanning electron microscopy(SEM),Ultraviolet-visible(UV-Vis)spectroscopy,inductively coapled plasma(ICP)elemental analysis and X-ray photoelectron spectrometry(XPS)spectroscopy were used to study the structure,morphology and composition of the zeolites,which was compared with those of samples prepared by traditional hydrothermal synthetic method and direct ion exchanging method.FeY zeolites were employed into heterogeneous catalytic system based on Fenton reaction,which had good catalytic degradation performance against methylene blue.The effects on the degradation rate were evaluated,including initial pH value of solution,initial concentration of H 2O 2,dosage of catalyst as well as different preparation methods.The optimum operation parameters for the Fenton oxidation were determined.Stabilities of the catalysts were also studied by successive recycling experiments.