【摘要】 合成了Y型分子筛的前驱体,以炭黑/P123为模板剂在酸性条件下对其进行组装,焙烧去除模板剂后制备具有大-介-微梯度孔材料。考察了前驱体老化时间、模板剂用量、pH和水与硅物质的量比等因素对材料合成的影响。结果表明,在前驱体老化时间7 h、n(P123)∶n(SiO2)=0.001 2～0.001 8、pH<2和n(H2O)∶n(SiO2)=200条件下,可以制备结晶度较高的梯度孔材料,pH和模板剂用量是影响梯度孔材料合成的主要因素。更多还原

【Abstract】 Zeolites with graded pores were synthesized via in-situ assembly of zeolite Y precursors using P123/carbon black dual templates with subsequent burning-off of the templates.Influence of aging time of the precursors,dosage of the templates,pH value and dosage of water on synthesis of the graded-pore zeolites was investigated.Zeolites with graded pores and high crystallinity were obtained under optimum synthesis condition as follows: aging time of 7 h,n(P123):n(SiO2) of 0.001 2-0.001 8,pH <2,n(H2O):n(SiO2) of 200.pH value and dosage of templates are the key influencing factors on synthesis of zeolites with graded pores.更多还原