All-inorganic core-shell silica-titania mesoporous colloidal nanoparticles showing orthogonal functionality

被引：5

作者：

Cauda, Valentina ^{[1
,2
,3
]}

Szeifert, Johann M. ^{[1
,2
]}

Merk, Karin ^{[1
,2
]}

Fattakhova-Rohlfing, Dina ^{[1
,2
]}

Bein, Thomas ^{[1
,2
]}

机构：

[1] Univ Munich, Dept Chem, D-81377 Munich, Germany

[2] Univ Munich, Ctr NanoSci CeNS, D-81377 Munich, Germany

[3] Italian Inst Technol IIT, CSHR Polito, I-10129 Turin, Italy

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2011年 / 21卷 / 36期

关键词：

HYDROGEN EVOLUTION; LIGHT; FILMS; PARTICLES;

D O I：

10.1039/c0jm04528d

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Colloidal mesoporous silica (CMS) nanoparticles with a thin titania-enriched outer shell showing a spatially resolved functionality were synthesized by a delayed co-condensation approach. The titania-shell can serve as a selective nucleation site for the growth of nanocrystalline anatase clusters. These fully inorganic pure silica-core titania-enriched shell mesoporous nanoparticles show orthogonal functionality, demonstrated through the selective adsorption of a carboxylate-containing ruthenium N3-dye. UV-Vis and fluorescence spectroscopy indicate the strong interaction of the N3-dye with the titania-phase at the outer shell of the CMS nanoparticles. In particular, this interaction and thus the selective functionalization are greatly enhanced when anatase nanocrystallites are nucleated at the titania-enriched shell surface.

引用

页码：13817 / 13824

页数：8

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