Yolk-shell hybrid materials with a periodic mesoporous organosilica shell: ideal nanoreactors for selective alcohol oxidation

Liu, Jian and Yang, Heng Quan and Kleitz, Freddy and Chen, Zhi Gang and Yang, Tianyu and Strounina, Ekaterina and Lu, Gao Qing (Max) and Qiao, Shi Zhang (2012) Yolk-shell hybrid materials with a periodic mesoporous organosilica shell: ideal nanoreactors for selective alcohol oxidation. Advanced Functional Materials, 22 (3). pp. 591-599. ISSN 1616-301X

Abstract

This contribution describes the preparation of multifunctional yolk-shell nanoparticles (YSNs) consisting of a core of silica spheres and an outer shell based on periodic mesoporous organosilica (PMO) with perpendicularly aligned mesoporous channels. The new yolk-shell hybrid materials were synthesised through a dual mesophase and vesicle soft templating method. The mesostructure of the shell, the dimension of the hollow space (4∼52 nm), and the shell thickness (16∼34 nm) could be adjusted by precise tuning of the synthesis parameters, as evidenced by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nitrogen sorption investigations. Various metal nanoparticles (e.g., Au, Pt, and Pd) were encapsulated and confined in the void space between the core and the shell using impregnation and reduction of adequate metal precursors. The selective oxidation of various alcohol substrates was then carried out to illustrate the benefits of such an architecture in catalysis. High conversion (∼100%) and excellent selectivity (∼99%) were obtained over Pd nanoparticles encapsulated in the hybrid PMO yolk-shell structures.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 15 Jun 2017 06:35
Last Modified: 15 Jun 2017 06:35
Uncontrolled Keywords: hybrid materials; nanoreactors; periodic mesoporous organosilica; selective oxidation; yolk-shell particles; alcohol oxidation; hollow spaces; mesophases; mesoporous; mesostructures; metal nanoparticles; metal precursor; nitrogen sorption; outer shells; PD nano particle; periodic mesoporous organosilicas; selective oxidation; shell thickness; silica sphere; synthesis parameters; templating method; void space; chemical reactions; chemical operations; ceramics, refractories and glass; physical properties of gases, liquids and solids; atomic and molecular physics; solid state physics; crystal lattice; nanotechnology; structural members and shapes; metals, plastics, wood and other structural materials; biomedical equipment; precious metals; electric and magnetic materials; electronic and thermionic materials; optical devices and systems
Fields of Research : 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030302 Nanochemistry and Supramolecular Chemistry
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1002/adfm.201101900
URI: http://eprints.usq.edu.au/id/eprint/31725

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