Purpose of CNTs on the mesoporous materials Purpose of CNTs on the mesoporous materials

+ SubstrateAdhesion layer

Vertically Aligned CNTscatalyst metal

Pore size : 7~8Å

Catalytic zeolite

OutlineOutline

Example of kinds of AlPO4-5 as zeolite

1. AlPO4-5 (IUPAC CODE AFI) possesses a system of parallel channels which are free from cations.

2. The existence of linear Al-P-O angles fund in the hexagonal structures of the earlier works gave reason for subsequent studies focused on whether they are average angles as a consequence of disorder of the oxygen around Al-P axis or they are actually the angles presented in this material

3. The inner diameter of the channel is 0.73nm, and the distance between two neighboring parallel channels is 1.36nm.

How to get the CNTs on the zeolite support?How to get the CNTs on the zeolite support?

Zeolite Catalytic materials as zeolite CNTs growth by PECVD Analysis

Channel type

Impregnation

Ion exchange

Stand plasma effect

No stand plasma effect

CVD method

Solution method

CNTs growth by Thermal CVD Mixing of HCNTs growth by Thermal CVD Mixing of H22 at high temp. at high temp.

Almost no vertically aligned SWNTs

Almost no SWNTs growth by PECVDAlmost no SWNTs growth by PECVD

sublimationsublimation

stirring or sonicationstirring or sonicationCavity type

Channel

Cavity

1.Method of impregnationO

AlO

PO

AlO

PO

AlO

PO

AlO

O O O O O O O O O O O O O O

2.Method of Ion exchange

OAli

OS i

OAl

OS i

OAl

OS i

OAl

O

O O O O O O O O O O O O O O

- -M+ M+- -

The growth of CNTs on zeolite supportThe growth of CNTs on zeolite support

Tilt view at low magnification of CNTs grown on the surface Tilt view at low magnification of CNTs grown on the surface of AlPOof AlPO44-5 – Al/Ti/Si substrate-5 – Al/Ti/Si substrate

50㎛

5㎛

1㎛

5㎛

5㎚

Grown CNTs on Surface of AlPO4-5

Initial stage of grown CNTs from AlPOInitial stage of grown CNTs from AlPO44-5 (TEM)-5 (TEM)

Initial stage of grown CNTs from AlPOInitial stage of grown CNTs from AlPO44-5 (SEM)-5 (SEM)