A General Approach for Monolayer Adsorption of High Weight Loadings of Uniform Nanocrystals on Oxide Supports

Monodispersed metal and semiconductor nanocrystals have attracted great attention in fundamental and applied research due to their tunable size, morphology, and well‐defined chemical composition. Utilizing these nanocrystals in a controllable way is highly desirable especially when using them as bui...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2021-03, Vol.60 (14), p.7971-7979
Main Authors: Kao, Kun‐Che, Yang, An‐Chih, Huang, Weixin, Zhou, Chengshuang, Goodman, Emmett D., Holm, Alexander, Frank, Curtis W., Cargnello, Matteo
Format: Article
Language:English
Subjects:
adsorption
Catalysis
Chemical composition
Crystals
Deposition
heterogeneous catalysis
Hydrophobicity
Ligands
Morphology
Nanocrystals
Nanostructured materials
oxide supports
Quantum dots
Stability
surface functionalization
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Summary:Monodispersed metal and semiconductor nanocrystals have attracted great attention in fundamental and applied research due to their tunable size, morphology, and well‐defined chemical composition. Utilizing these nanocrystals in a controllable way is highly desirable especially when using them as building blocks for the preparation of nanostructured materials. Their deposition onto oxide materials provide them with wide applicability in many areas, including catalysis. However, so far deposition methods are limited and do not provide control to achieve high particle loadings. This study demonstrates a general approach for the deposition of hydrophobic ligand‐stabilized nanocrystals on hydrophilic oxide supports without ligand‐exchange. Surface functionalization of the supports with primary amine groups either using an organosilane ((3‐aminopropyl)trimethoxysilane) or bonding with aminoalcohols (3‐amino‐1,2‐propanediol) were found to significantly improve the interaction between nanocrystals and supports achieving high loadings (>10 wt. %). The bonding method with aminoalcohols guarantees the opportunity to remove the binding molecules thus allowing clean metal/oxide materials to be obtained, which is of great importance in the preparation of supported nanocrystals for heterogeneous catalysis. A general strategy for monolayer adsorption of hydrophobic surfactant‐stabilized nanocrystals on oxides through surface functionalization with amino groups is presented.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202017238