A General Approach for Monolayer Adsorption of High Weight Loadings of Uniform Nanocrystals on Oxide Supports. Issue 14 (24th February 2021)

• Record Type: Journal Article
• Authors: Kao, Kun‐Che; Yang, An‐Chih; Huang, Weixin; Zhou, Chengshuang; Goodman, Emmett D.; Holm, Alexander; Frank, Curtis W.; Cargnello, Matteo
• Is Part Of: Angewandte Chemie international edition. Volume 60:Issue 14(2021)
• Page Start: 7971
• Page End: 7979
• Publication Date: 2021-02-24
• Subjects: adsorption -- heterogeneous catalysis -- nanocrystals -- oxide supports -- surface functionalization; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202017238
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: 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. Abstract : A general strategy for monolayer adsorption of hydrophobic surfactant‐stabilized nanocrystals on oxides through surface functionalization with amino groups is presented.