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Related Concept Videos

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Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
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Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
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Related Experiment Video

Updated: Apr 7, 2026

Synthesis of Zeolites Using the ADOR Assembly-Disassembly-Organization-Reassembly Route
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Silanization-Based Zeolite Crystallization: Participation Degree and Pathway.

Yueer Yan1, Arepati Azhati1, Xiao Guo1

  • 1Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, Collaborative Innovation Centre of Chemistry for Energy Materials, Fudan University, Shanghai, 200433 (P.R. China).

Chemistry (Weinheim an Der Bergstrasse, Germany)
|July 16, 2015
PubMed
Summary

Organosilanes inhibit zeolite crystallization by controlling their participation. This dynamic process influences nucleation, growth, and the final properties of hierarchical zeolites.

Keywords:
crystallizationmesoporous materialsnanoparticlessilaneszeolites

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Crystallography

Background:

  • Hierarchical zeolites offer improved performance in catalysis and separation.
  • Controlling zeolite crystallization is key to tailoring their structure and properties.
  • Organosilanes are increasingly used in zeolite synthesis, but their precise role is not fully understood.

Purpose of the Study:

  • To systematically investigate the effects of different organosilanes on zeolite crystallization.
  • To elucidate the mechanism by which organosilanes influence zeolite formation.
  • To provide insights for the rational design of hierarchical zeolites using organosilanes.

Main Methods:

  • Systematic study of organosilane effects on zeolite crystallization.
  • Analysis of nucleation and growth periods.
  • Characterization of product properties, including crystallinity and mesoporosity.

Main Results:

  • Organosilanes act as inhibitors in silanization-based zeolite synthesis.
  • The degree of organosilane participation dictates the extent of inhibition.
  • A dynamic participation pathway was proposed, where organosilane removal increases crystallinity and decreases mesoporosity.
  • Organosilane participation influences zeolite nucleation, growth, and final product properties.

Conclusions:

  • Organosilane plays a crucial inhibitory role in zeolite crystallization.
  • The dynamic removal of organosilane during zeolite growth is a key factor in determining product characteristics.
  • Understanding this dynamic influences the selection of organosilanes and crystallization conditions for optimal hierarchical zeolite synthesis.