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无铝V-β分子筛的合成、表征及催化性能研究 总被引:1,自引:0,他引:1
采用水热晶化法在SiO2-V2O5-(TEA)2O-NH4F-H2O体系中合成了无铝V-β分子筛,运用XRD,IR,UV-Vis漫反射,TG/DTA和SEM等技术表征了样品的物理化学特性,证明样品具有BEA拓扑结构,结晶良好,且钒原子进入了分子筛骨架. 探讨了反应混合物组成对V-β分子筛晶化的影响,在以H2O2为氧化剂的苯酚羟基化反应中,考察了V-β分子筛的催化氧化性能. 相似文献
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用无机硅钛原料合成无铝Ti-β分子筛的研究 总被引:2,自引:0,他引:2
Ti-β zeolite has been successfully synthesized by using fumed silica and TiCl3 as silicon and titanium sources respectively under the hydrothermal conditions.Because inorganic Si and Ti compounds instead of relative organic metal compounds were used in the synthesis of Ti-β ,and then a tedious hydrolysis procedure of organic metal compounds was avoided,the gelatin time was reduced,the synthesis process was simplified and easily reproduced.Importantly,the synthesized Ti-β zeolite,which was characterized by XRD, FT-IR, UV-Vis and DTA, didn't exist TiO2 crystals and had a good quality. 相似文献
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纳米沸石合成的影响因素 总被引:4,自引:0,他引:4
对影响纳米沸石合成的因素进行了综述.在合成体系中,通过加分散剂、分散介质、矿化剂、导向剂、晶种,减少碱金属离子,改善工艺条件等途径,可减小沸石的粒径,制备出粒径为纳米级的沸石. 相似文献
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