The assembly-disassembly-organization-reassembly mechanism for 3D-2D-3D transformation of germanosilicate IWW zeolite.
Hydrolysis of germanosilicate zeolites with the IWW structure shows two different outcomes depending on the composition of the starting materials. Ge-rich IWW (Si/Ge=3.1) is disassembled into a layered material (IPC-5P), which can be reassembled into an almost pure silica IWW on treatment with diethoxydimethylsilane. Ge-poor IWW (Si/Ge=6.4) is not completely disassembled on hydrolysis, but retains some 3D connectivity. This structure can be reassembled into IWW by incorporation of Al to fill the defects left when the Ge is removed.
Department of Synthesis and Catalysis, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of Czech Republic, v.v.i. Dolejškova 3, 18223 Prague (Czech Republic) http://www.jh-inst.cas.cz.
Pavla
P
Chlubná-Eliášová
Yuyang
Y
Tian
Ana B
AB
Pinar
Martin
M
Kubů
Jiří
J
Čejka
Russell E
RE
Morris
ADOR; IWW; germanosilicate; solid-state transformation; zeolites