Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Manipulation of amorphous precursors to enhance zeolite nucleation

Journal Article · · Faraday Discussions
DOI:https://doi.org/10.1039/d1fd00096a· OSTI ID:1978791

Crystallization in media comprised of amorphous precursors is becoming a more common phenomenon for numerous synthetic, biological, and natural materials that grow by a combination of classical and nonclassical pathways. Amorphous phases can exhibit a wide range of physicochemical properties that may evolve during the course of nucleation and crystal growth. This creates challenges for establishing causal relationships between amorphous precursor properties and their effect(s) on the selection of mechanistic pathways of crystallization and ultimately the properties of the crystalline product. In this study, we examine ways to manipulate the composition and colloidal stability of amorphous (alumino)silicate precursors that are prevalent in nanoporous zeolite syntheses. Changes in the amorphous precursor properties are evaluated on the basis of their ability to enhance rates of crystal formation. Here, we use fumed silica as the primary silicon source and examine the effects of infusing the source or growth medium with additional alkali metal, which serves as an inorganic structure-directing agent to facilitate the formation of porous crystal structures. We also assess the impact of adding a polymer additive, which reduces the colloidal stability of precursors, wherein we posit that the confined pockets of solution within the interstitial spaces of the precursor aggregates play an important role in regulating the rate of zeolite crystallization. Three commercially relevant zeolites (mordenite, SSZ-13, and ZSM-5) were selected for this study based on their diverse frameworks and methods of preparation. Here our findings reveal that alkali infusion significantly reduces the crystallization times for mordenite and SSZ-13, but has little impact on ZSM-5 synthesis. Conversely, we find that polymer addition markedly enhanced the rates of crystallization among all three zeolites, suggesting that this method may be a general approach to reduce zeolite synthesis times. Given the relatively high costs associated with commercial zeolite production, identifying new methods to improve the efficiency of hydrothermal syntheses can have significant practical implications beyond the fundamental benefits of developing new routes to tailor nonclassical crystallization.

Research Organization:
University of Houston, TX (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); Welch Foundation
Grant/Contract Number:
SC0021384
OSTI ID:
1978791
Alternate ID(s):
OSTI ID: 1862708
Journal Information:
Faraday Discussions, Journal Name: Faraday Discussions Journal Issue: 0 Vol. 235; ISSN 1359-6640
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

References (64)

Tailoring Silicalite-1 Crystal Morphology with Molecular Modifiers journal January 2012
Regulating Nonclassical Pathways of Silicalite‐1 Crystallization through Controlled Evolution of Amorphous Precursors journal September 2019
Conversion of Methanol to Hydrocarbons: How Zeolite Cavity and Pore Size Controls Product Selectivity journal April 2012
Ultrasmall Zeolite L Crystals Prepared from Highly Interdispersed Alkali-Silicate Precursors journal July 2018
Observing a Zeolite Nucleus (Subcrystal) with a Uniform Framework Structure and Its Oriented Attachment without Single‐Molecule Addition journal June 2021
Silica Self-Assembly and Synthesis of Microporous and Mesoporous Silicates journal April 2006
Template-free synthesis and catalytic behaviour of aluminium-rich MFI-type zeolites journal May 1999
The ammonia selective catalytic reduction activity of copper-exchanged small-pore zeolites journal February 2011
Natural zeolites as effective adsorbents in water and wastewater treatment journal January 2010
Transient amorphous calcium phosphate in forming enamel journal May 2009
Reinvestigation into the synthesis of zeolites using diquaternary alkylammonium ions (CH3)3N+(CH2)nN+(CH3)3 with n=3–10 as structure-directing agents journal March 2004
Compositional and kinetic study on the rapid crystallization of ZSM-5 in the absence of organic template under stirring journal July 2004
Zeolite Crystal Growth Analysis by Dissolution journal August 2019
Zinc Ions Modify Calcium Oxalate Growth by Distinct Transformation of Crystal Surface Termination journal May 2021
Tracking Zeolite Crystallization by Elemental Mapping journal April 2020
Energetics of the Local Environment of Structure-Directing Agents Influence Zeolite Synthesis journal March 2021
Precipitation of Amorphous Calcium Oxalate in Aqueous Solution journal May 2015
Assembly and Evolution of Amorphous Precursors in Zeolite L Crystallization journal February 2016
Engineering Crystal Modifiers: Bridging Classical and Nonclassical Crystallization journal October 2016
Small-Pore Zeolites: Synthesis and Catalysis journal May 2018
Diverse Physical States of Amorphous Precursors in Zeolite Synthesis journal June 2018
Tuning Zeolite Precursor Interactions by Switching the Valence of Polyamine Modifiers journal October 2016
Deconvoluting the Competing Effects of Zeolite Framework Topology and Diffusion Path Length on Methanol to Hydrocarbons Reaction journal September 2018
Strontium Ions Function as Both an Accelerant and Structure-Directing Agent of Chabazite Crystallization journal December 2020
Nucleation journal December 2010
Hierarchically Structure-Directing Effect of Multi-Ammonium Surfactants for the Generation of MFI Zeolite Nanosheets journal December 2011
Unusual Pathway of Crystallization of Zeolite ZSM-5 in a Heterogeneous System: Phenomenology and Starting Considerations journal May 2012
Transition Bars during Transformation of an Amorphous Calcium Carbonate Precursor journal November 2008
Biomimetic Model Systems for Investigating the Amorphous Precursor Pathway and Its Role in Biomineralization journal November 2008
Zeolites and molecular sieves: not just ordinary catalysts journal August 1991
Synthesis of Cu 2 O Nanocrystals from Cubic to Rhombic Dodecahedral Structures and Their Comparative Photocatalytic Activity journal December 2011
Synthesis and Catalytic Properties of Metal Clusters Encapsulated within Small-Pore (SOD, GIS, ANA) Zeolites journal October 2012
Encapsulation of Metal Clusters within MFI via Interzeolite Transformations and Direct Hydrothermal Syntheses and Catalytic Consequences of Their Confinement journal October 2014
Crystallization in Zeolite A Studied by Atomic Force Microscopy journal October 1998
Controlling Nucleation Pathways in Zeolite Crystallization: Seeding Conceptual Methodologies for Advanced Materials Design journal December 2021
SSZ-13 Crystallization by Particle Attachment and Deterministic Pathways to Crystal Size Control journal September 2015
Evolution of Self-Assembled Silica−Tetrapropylammonium Nanoparticles at Elevated Temperatures journal July 2005
Thermodynamics of Silica Nanoparticle Self-Assembly in Basic Solutions of Monovalent Cations journal August 2008
Dehydration and crystallization of amorphous calcium carbonate in solution and in air journal January 2014
Nucleation and growth of magnetite from solution journal February 2013
Calcium carbonate nucleation driven by ion binding in a biomimetic matrix revealed by in situ electron microscopy journal January 2015
The nanocomposite nature of bone drives its strength and damage resistance journal August 2016
Structural absorption by barbule microstructures of super black bird of paradise feathers journal January 2018
Crystallization by particle attachment is a colloidal assembly process journal October 2019
Minerals from colloidal assembly journal March 2020
Finned zeolite catalysts journal August 2020
Zeolites as catalysts in oil refining journal January 2014
Identifying alkali metal inhibitors of crystal growth: a selection criterion based on ion pair hydration energy journal January 2015
Recent advances in zeolite chemistry and catalysis journal January 2015
Cooperative effects of inorganic and organic structure-directing agents in ZSM-5 crystallization journal January 2018
Cyclic diquaternary ammoniums for nanocrystalline BEA, MTW and MFI zeolites with intercrystalline mesoporosity journal January 2009
CO2 capture from gas stream by zeolite 13X using a dual-column temperature/vacuum swing adsorption journal January 2012
Polymer-induced liquid precursor (PILP) phases of calcium carbonate formed in the presence of synthetic acidic polypeptides—relevance to biomineralization journal January 2012
A metastable liquid precursor phase of calcium carbonate and its interactions with polyaspartate journal January 2012
Spinodal for the solution-to-crystal phase transformation journal July 2005
Carboxylated molecules regulate magnesium content of amorphous calcium carbonates during calcification journal December 2009
Phase transitions in biogenic amorphous calcium carbonate journal April 2012
Two types of amorphous protein particles facilitate crystal nucleation journal February 2017
In situ imaging of two-dimensional surface growth reveals the prevalence and role of defects in zeolite crystallization journal October 2020
Time-resolved dissolution elucidates the mechanism of zeolite MFI crystallization journal June 2021
Sea Urchin Spine Calcite Forms via a Transient Amorphous Calcium Carbonate Phase journal November 2004
In Situ Imaging of Silicalite-1 Surface Growth Reveals the Mechanism of Crystallization journal May 2014
Enhancement of Protein Crystal Nucleation by Critical Density Fluctuations journal September 1997
Dynamic multinuclear sites formed by mobilized copper ions in NO x selective catalytic reduction journal August 2017

Similar Records

The Current Understanding of Mechanistic Pathways in Zeolite Crystallization
Journal Article · Thu Mar 14 00:00:00 EDT 2024 · Chemical Reviews · OSTI ID:2339454

In Situ Imaging of Faujasite Surface Growth Reveals Unique Pathways of Zeolite Crystallization
Journal Article · Wed Jan 04 23:00:00 EST 2023 · Journal of the American Chemical Society · OSTI ID:2339458