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酸性条件下,用环六亚甲基四胺作为pH调节剂,采用pH调节法直接合成了铜同构替代掺杂的SBA-15中孔分子筛(Cu/SBA-15).采用X-射线衍射(XRD)、扫描电子显微镜-能量色散X射线光谱(SEM-EDX)、透射电子显微镜(TEM)以及傅立叶变换红外光谱(FT-IR)等技术对目标材料进行了表征.结果表明:该材料具有六方中孔有序结构,且环六亚甲基四胺显著影响了铜和SBA-15硅骨架的结合,在水热合成过程中,环六亚甲基四胺分解释放出氨气,增加了体系的pH值,有助于更多的铜进入到分子筛的骨架中.该材料可用于N2O分解反应的催化剂,其中Cu/SBA-15(110)在600℃下具有优异的催化活性,可分解50%N2O.
Under acidic conditions, the copper isomorphous substituted SBA-15 mesoporous molecular sieves (Cu / SBA-15) were directly synthesized by pH adjustment using cyclohexanedimethylene tetramine as the pH modifier.Using X-ray diffraction The materials were characterized by XRD, SEM-EDX, TEM and FT-IR.The results showed that the material has Hexagonal mesoporous ordered structure, and hexamethylene tetramine significantly affect the copper and SBA-15 silicon skeleton of the combination of hydrothermal synthesis, the decomposition of hexamethylenetetramine released ammonia, an increase of The pH value of the system is conducive to more copper entering the framework of the molecular sieve.This material can be used as a catalyst for N2O decomposition reaction, in which Cu / SBA-15 (110) has excellent catalytic activity at 600 ℃, Can decompose 50% N2O.