【摘要】 以KMnO₄和P123为原料采用溶胶-凝胶法在不同条件下制备了介孔MnO₂,研究了反应物比和pH对催化剂结构和催化降解性能的影响。合成材料的结构和性能采用XRD、N₂吸脱附、FT-IR的测试方法表征。最后讨论了介孔MnO₂催化氧化HCHO的影响因素。结果表明,溶胶-凝胶法制备介孔MnO₂的最佳条件为:原料配比为10:1,pH值为7。P123和KMnO₄合成的介孔MnO₂具有较大的比表面积和孔径,且有良好的HCHO催化降解性能。在pH=7的情况下最有利于介孔MnO₂的活性稳定;在原料比为10:1情况下生成的介孔MnO₂比表面积较大,催化降解性能较强,在10 h内保持在对甲醛的降解率为95%以上。更多还原

【Abstract】 Mesoporous MnO₂ was prepared by sol-gel method using KMnO₄ and P123 as raw materials, and the effects of reactant ratio and pH on the catalytic oxidation performance of the product were investigated. The structure and properties of the synthesized materials were characterized by XRD, N₂ adsorption and desorption, and FT-IR. Finally, the influencing factors of the catalytic oxidation of HCHO by mesoporous MnO₂ were discussed. The results show that the mesoporous MnO₂ has good catalytic oxidation performance to HCHO. The optimum conditions of the preparation are as follows: the ratio of KMnO₄ and P123 is 10:1 and the pH is 7, when the specific surface area of mesoporous MnO₂（pH 7-10:1） is largest, the oxidation performance is the strongest, and the degradation rate of formaldehyde maintains at 95% within 10 h.更多还原