Purpose of CNTs on the mesoporous materials
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Transcript of Purpose of CNTs on the mesoporous materials
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)