ZSM-5纳米薄片定向堆积合成分子筛团聚体

doi:10.19964/j.issn.1006-4990.2021-0278

摘要/Abstract

摘要：

开发了一种新型的纳米微晶silicate-1（S-2）的合成方法。与常规的silicate-1（S-1）相比,S-2具有较小的粒径和光滑的晶体表面。当S-2作为晶种合成纳米ZSM-5聚集体时,ZSM-5团聚体为尺寸为0.8~1.0 μm的单分散颗粒,构成团聚体的ZSM-5晶体为b轴厚度为60~80 nm的纳米薄片。ZSM-5纳米薄片沿着同一方向规则地堆叠形成独特的孔结构,该孔结构包括1.3 nm的均一孔道和25 nm的宽尺寸孔道。

关键词: ZSM-5团聚体, 晶种, 多级孔, 纳米薄片

Abstract:

A new synthetic method of nanocrystalline silicate-1（S-2） was developed.Compared with the conventional sili-cate-1（S-1）,S-2 had smaller particle size and smooth crystal surface.When S-2 was used as seed crystal to synthesize nano-ZSM-5 aggregates,the ZSM-5 aggregates were monodisperse particles with size of 0.8~1.0 μm,which were composed by the ZSM-5 crystals with the b-axis thickness of 60~80 nm.The ZSM-5 nanosheets were regularly stacked along the b-axis forming a unique pore structure,including a uniform pore size distribution with an average size of 1.3 nm and a wide pore size distribution of 25 nm.

Key words: ZSM-5 aggregates, seed, hierarchical pore, nanosheet

中图分类号:

TQ424.25

李孝国,米晓彤,曹辉,常洋,张永坤,李永恒. ZSM-5纳米薄片定向堆积合成分子筛团聚体[J]. 无机盐工业, 2022, 54(1): 112-116.

LI Xiaoguo,MI Xiaotong,CAO Hui,CHANG Yang,ZHANG Yongkun,LI Yongheng. Synthesis of ZSM-5 aggregates assembled by oriented stacking nanosheets[J]. Inorganic Chemicals Industry, 2022, 54(1): 112-116.

图/表 8

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样品	相对结晶度/%	样品	相对结晶度/%
S-1-1	81	S-2-1	84
S-1-2	90	S-2-2	92
S-1-3	97	S-2-3	100

样品	S_BET/ （m²·g^-1）	S_micro / （m²·g^-1）	S_ext/ （m²·g^-1）	V_total/ （cm³·g^-1）	V_micro/ （cm³·g^-1）	V_ext / （cm³·g^-1）
S-1-1	323	278	45	0.20	0.11	0.09
S-1-2	289	257	32	0.16	0.10	0.06
S-1-3	293	265	28	0.15	0.10	0.05
S-2-1	329	279	50	0.27	0.11	0.16
S-2-2	315	273	42	0.23	0.11	0.12
S-2-3	296	264	32	0.18	0.10	0.08

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