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
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
收藏
页码:13817 / 13824
页数:8
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