Multifunctional Roles of TiO 2 Nanoparticles for Architecture of Complex Core−Shells and Hollow Spheres of SiO 2 −TiO 2 −Polyaniline System

Handle URI:
http://hdl.handle.net/10754/600268
Title:
Multifunctional Roles of TiO 2 Nanoparticles for Architecture of Complex Core−Shells and Hollow Spheres of SiO 2 −TiO 2 −Polyaniline System
Authors:
Wang, Dan Ping; Zeng, Hua Chun
Abstract:
Nanoparticles are often used as seeds to grow one-dimensional nanomaterials or as core materials to prepare core-shell nanostructures. On the other hand, the presynthesized inorganic nanoparticles can also be used as starting building blocks to prepare inorganic-polymer nanocomposites. In this work, we explore the roles of metal-oxide nanoparticles (anatase TiO2) in the area of constructional synthesis of highly complex core-shell and hollow sphere nanostructures comprising SiO2, TiO2, and polyaniline (PAN). In particular, multifunctional roles of oleate-surfactant-protected TiO2 nanoparticles have been revealed in this study: they provide starting sites for polymerization of aniline on the surface of SiO2 mesospheres; they land on the inner surface of polyaniline shell to form a secondary material phase; they work as initial crystalline seeds for homogeneous growth of interior TiO2 shell; and they serve as primary nanobuilding blocks to form exterior TiO2 shell on the polyaniline via self-assembly. With the assistance of the TiO2 nanoparticles, a total of six complex core-shell and hollow sphere nanocomposites (SiO 2/TiO2, SiO2/TiO2/PAN, SiO 2/TiO2/PAN/TiO2, TiO2/PAN, TiO 2/PAN/TiO2, and TiO2/TiO2) have been made in this work through controlled self-assembly, templating growth, polymerization, and homogeneous seeded growth. Applicability of these nanostructures in photocatalytic applications has also been demonstrated by our preliminary investigations. The easy separation of used catalysts after reaction seems to be advantageous because of relatively large external diameters of the lightweight nanocomposites. © 2009 American Chemical Society.
Citation:
Wang DP, Zeng HC (2009) Multifunctional Roles of TiO 2 Nanoparticles for Architecture of Complex Core−Shells and Hollow Spheres of SiO 2 −TiO 2 −Polyaniline System . Chem Mater 21: 4811–4823. Available: http://dx.doi.org/10.1021/cm901509t.
Publisher:
American Chemical Society (ACS)
Journal:
Chemistry of Materials
Issue Date:
27-Oct-2009
DOI:
10.1021/cm901509t
Type:
Article
ISSN:
0897-4756; 1520-5002
Sponsors:
The authors gratefully acknowledge the Economic Development Board, Singapore, and King Abdullah University of Science and Technology, Saudi Arabia, for support of this research. D.P.W. also thanks the National University of Singapore for providing her postgraduate scholarship.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorWang, Dan Pingen
dc.contributor.authorZeng, Hua Chunen
dc.date.accessioned2016-02-28T08:00:21Zen
dc.date.available2016-02-28T08:00:21Zen
dc.date.issued2009-10-27en
dc.identifier.citationWang DP, Zeng HC (2009) Multifunctional Roles of TiO 2 Nanoparticles for Architecture of Complex Core−Shells and Hollow Spheres of SiO 2 −TiO 2 −Polyaniline System . Chem Mater 21: 4811–4823. Available: http://dx.doi.org/10.1021/cm901509t.en
dc.identifier.issn0897-4756en
dc.identifier.issn1520-5002en
dc.identifier.doi10.1021/cm901509ten
dc.identifier.urihttp://hdl.handle.net/10754/600268en
dc.description.abstractNanoparticles are often used as seeds to grow one-dimensional nanomaterials or as core materials to prepare core-shell nanostructures. On the other hand, the presynthesized inorganic nanoparticles can also be used as starting building blocks to prepare inorganic-polymer nanocomposites. In this work, we explore the roles of metal-oxide nanoparticles (anatase TiO2) in the area of constructional synthesis of highly complex core-shell and hollow sphere nanostructures comprising SiO2, TiO2, and polyaniline (PAN). In particular, multifunctional roles of oleate-surfactant-protected TiO2 nanoparticles have been revealed in this study: they provide starting sites for polymerization of aniline on the surface of SiO2 mesospheres; they land on the inner surface of polyaniline shell to form a secondary material phase; they work as initial crystalline seeds for homogeneous growth of interior TiO2 shell; and they serve as primary nanobuilding blocks to form exterior TiO2 shell on the polyaniline via self-assembly. With the assistance of the TiO2 nanoparticles, a total of six complex core-shell and hollow sphere nanocomposites (SiO 2/TiO2, SiO2/TiO2/PAN, SiO 2/TiO2/PAN/TiO2, TiO2/PAN, TiO 2/PAN/TiO2, and TiO2/TiO2) have been made in this work through controlled self-assembly, templating growth, polymerization, and homogeneous seeded growth. Applicability of these nanostructures in photocatalytic applications has also been demonstrated by our preliminary investigations. The easy separation of used catalysts after reaction seems to be advantageous because of relatively large external diameters of the lightweight nanocomposites. © 2009 American Chemical Society.en
dc.description.sponsorshipThe authors gratefully acknowledge the Economic Development Board, Singapore, and King Abdullah University of Science and Technology, Saudi Arabia, for support of this research. D.P.W. also thanks the National University of Singapore for providing her postgraduate scholarship.en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleMultifunctional Roles of TiO 2 Nanoparticles for Architecture of Complex Core−Shells and Hollow Spheres of SiO 2 −TiO 2 −Polyaniline Systemen
dc.typeArticleen
dc.identifier.journalChemistry of Materialsen
dc.contributor.institutionNational University of Singapore, Singapore City, Singaporeen
kaust.authorWang, Dan Pingen
kaust.authorZeng, Hua Chunen
kaust.grant.fundedcenterKAUST-NUS GCR Programen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.