Zeolite nanotubes and methods of making and use thereof

Patent metadata

Field	Value
Publication number	US-12590007-B2
Application number	US-202118019315-A
Country	US
Kind code	B2
Filing date	Aug 5, 2021
Priority date	Aug 5, 2020
Publication date	Mar 31, 2026
Grant date	Mar 31, 2026

Abstract

Disclosed herein are nanostructured hierarchical zeolitic materials comprising: a plurality of zeolite nanotubes, each zeolite nanotube comprising a zeolitic wall perforated by a plurality of pores, the zeolitic wall defining a single longitudinal lumen. Also disclosed herein are bolaform structure directing agents comprising: a first hydrophilic end and a second hydrophilic end with a hydrophobic core therebetween; the hydrophobic core comprising one or more aromatic rings and one or more hydrophobic alkyl groups; the one or more aromatic rings comprising a biphenyl group; the one or more hydrophobic alkyl groups each independently comprising a C 10 alkyl group; and the first hydrophilic end and the second hydrophilic end each independently comprising a quinuclidinium group. Also disclosed herein are methods of making and use of the plurality of zeolite nanotubes and the bolaform structure directing agents.

First claim

What is claimed is:

1 . A nanostructured hierarchical zeolitic material comprising: a plurality of zeolite nanotubes, wherein each zeolite nanotube comprises a zeolitic wall perforated by a plurality of pores, the zeolitic wall defining a single longitudinal lumen, and wherein the plurality of zeolite nanotubes further comprise a bolaform structure directing agent comprising a first hydrophilic end and a second hydrophilic end with a hydrophobic core therebetween.

2 . The material of claim 1 , wherein the zeolitic wall comprises a zeolitic material, the zeolitic material comprising an aluminosilicate material.

3 . The material of claim 2 , wherein the aluminosilicate material comprises Si and Al in a ratio of from 14:1 to 18:1 (w/w).

4 . The material of claim 1 , wherein the zeolitic wall comprises some structural elements of a beta zeolite structure, an MFI zeolite structure, or a combination thereof.

5 . The material of claim 1 , wherein:
the plurality of zeolite nanotubes have an average length of from 20 nanometers (nm) to 10 micrometers (μm, microns); the plurality of zeolite nanotubes have an average outer diameter of from 1 nanometer to 10 nanometers; the plurality of zeolite nanotubes have an average aspect ratio of from 2 to 10,000; the plurality of zeolite nanotubes have an average inner diameter of 0.5 nm to 9 nm; or a combination thereof.

6 . The material of claim 1 , wherein the plurality of zeolite nanotubes have an average wall thickness of from 0.5 nm to 5 nm.

7 . The material of claim 1 , wherein the plurality of pores have an average diameter of from 0.2 to 2 nm.

8 . The material of claim 1 , wherein the plurality of zeolite nanotubes are substantially crystalline.

9 . The material of claim 1 , wherein the plurality of zeolite nanotubes have an average surface area of from 500 to 5000 meters squared per gram of the plurality of zeolite nanotubes (m 2 /g).

10 . The material of claim 1 , wherein the hydrophobic core comprises one or more aromatic rings, one or more hydrophobic alkyl groups, or a combination thereof; wherein the first hydrophilic end and the second hydrophilic end each independently comprises a quinuclidinium group; or a combination thereof.

11 . The material of claim 1 , wherein the bolaform structure directing agent comprises a molecule with the following structure

12 . A method of making the material of claim 1 , wherein the method comprises hydrothermal zeolite growth using the bolaform structure directing agent.

13 . The method of claim 12 , wherein the hydrophobic core comprises one or more aromatic rings, one or more hydrophobic alkyl groups, or a combination thereof; wherein the first hydrophilic end and the second hydrophilic end each independently comprises a quinuclidinium group; or a combination thereof.

14 . The method of claim 12 , wherein the bolaform structure directing agent comprises a molecule with the following structure.

15 . The method of claim 12 , wherein the method further comprises calcination.

16 . A bolaform structure directing agent, comprising:
a first hydrophilic end and a second hydrophilic end with a hydrophobic core therebetween; wherein the hydrophobic core comprises one or more aromatic rings and one or more hydrophobic alkyl groups; wherein the one or more aromatic rings comprises a biphenyl group; wherein the one or more hydrophobic alkyl groups each independently comprises a C 10 alkyl group; wherein the first hydrophilic end and the second hydrophilic end each independently comprises a quinuclidinium group.

17 . The bolaform structure directing agent of any one of claim 16 , wherein the bolaform structure directing agent comprises a molecule with the following structure.

18 . A method of use of the material of claim 1 , the method comprising using the material as a catalyst, as a catalyst support, as an adsorbent, in a chemical separation, or a combination thereof.

19 . A catalyst and/or catalyst support comprising the material of claim 1 .

Assignees

• Georgia Tech Res Inst
• Nair Sankar
• Jones Christopher W
• Korde Akshay
• Leisen Johannes
• Min Byunghyun
• Wang Ziyuan

Inventors

• Nair Sankar
• Jones Christopher W
• Korde Akshay
• Leisen Johannes
• Min Byunghyun
• Wang Ziyuan

Classifications

• B01J2235/15

  X-ray diffraction · CPC title

• B01J2235/10

  Infrared [IR] · CPC title

• B01J35/45

  Nanoparticles · CPC title

• B01J2235/00

  Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties · CPC title

• B01J2235/30

  Scanning electron microscopy; Transmission electron microscopy · CPC title