Assembly of molten transition metal salt surfactant in a confined space for the synthesis of mesoporous metal oxide-rich metal oxide silica thin films

Date
2011
Authors
Karakaya, C.
Türker, Y.
Albayrak, C.
Dag, Ö.
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
Chemistry of Materials
Print ISSN
0897-4756
Electronic ISSN
1520-5002
Publisher
Volume
23
Issue
12
Pages
3062 - 3071
Language
English
Type
Article
Journal Title
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Abstract

Uniform and homogeneous coating of mesoporous materials with an active (catalytically, photonic, electrical) nanostructure can be very useful for a number of applications. Understanding chemical reactions in a confined space is important in order to design new advanced materials. In this work, we demonstrate that an extensive amount (as high as 53 mol percent) of transition metal salts can be confined between silica walls and two surfactant domains (cetyltrimethylammonium bromide, CTAB, and lauryl ether, C12H25(OCH2CH2)10OH, C12EO10) as molten salts and then converted into sponge-like mesoporous silica–metal oxides by thermal annealing. This investigation has been carried out using two different salts, namely, zinc nitrate hexahydrate, Zn(H2O)62, and cadmium nitrate tetrahydrate, Cd(H2O)42, in a broad range of salt concentrations. The ZnO (or CdO) layers are as thin as about ∼1.6 nm and are homogenously coated as crystalline nano-islands over the silica pore walls.

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Book Title
Keywords
Confinement effect, Lyotropic liquid crystals, Mesoporous materials, Metal oxides, Molten phase, Thin films
Citation
Published Version (Please cite this version)