Capturing Ultrasmall EMT Zeolite from Template-Free Systems | Zendy

EngPoh Ng | Zendy; Daniel Chateigner | Zendy; Thomas Bein | Zendy; Valentin Valtchev | Zendy; Svetlana Mintova | Zendy

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Capturing Ultrasmall EMT Zeolite from Template-Free Systems

Author(s) -

EngPoh Ng,

Daniel Chateigner,

Thomas Bein,

Valentin Valtchev,

Svetlana Mintova

Publication year - 2011

Publication title -

science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 12.556

H-Index - 1186

eISSN - 1095-9203

pISSN - 0036-8075

DOI - 10.1126/science.1214798

Subject(s) - zeolite , nucleation , selectivity , hydrocarbon , template , catalysis , chemical engineering , materials science , diffusion , nanotechnology , nanometre , fluid catalytic cracking , cracking , chemistry , organic chemistry , thermodynamics , composite material , physics , engineering

Small differences between the lattice energies of different zeolites suggest that kinetic factors are of major importance in controlling zeolite nucleation. Thus, it is critical to control the nucleation kinetics in order to obtain a desired microporous material. Here, we demonstrate how careful investigation of the very early stages of zeolite crystallization in colloidal systems can provide access to important nanoscale zeolite phases while avoiding the use of expensive organic templates. We report the effective synthesis of ultrasmall (6- to 15-nanometer) crystals of the large-pore zeolite EMT from template-free colloidal precursors at low temperature (30°C) and very high yield.

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