Synthesis, characterization, and photocatalytic properties of core/shell mesoporous silica nanospheres supporting nanocrystalline titania
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The facile bulk synthesis of silica nanospheres makes them an attractive support for the transport of chemical compounds such as nanocrystalline titanium dioxide. In this contribution we present a promising route for the synthesis of mesoporous silica nanospheres (m-SiO2) with diameter in range 200 nm, which are ideal supports for nanocrystalline titanium dioxide (TiO2). The detailed microscopic and spectroscopic characterizations of core/shell structure (m-SiO2/TiO2) were conducted. Moreover, the photocatalytic potential of the nanostructures was investigated via phenol decomposition and hydrogen generation. A clear enhancement of photoactivity in both reactions as compared to commercial TiO2-Degussa P25 catalyst is detected.
KeywordsSilica nanospheres Mesoporous silica nanospheres Titanium dioxide Core/shell structure Photocatalytic activity
Authors are grateful for financial support of Polish Foundation for Science within FOCUS Program (F4/2010) and EU commission within “Carbio” project on “Multifunctional carbon nanotubes for biomedical application”—Marie Curie Fellowship (EU), MHR thanks the EU (ECEMP) and the Freistaat Sachsen.
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