期刊
COLLOID AND POLYMER SCIENCE
卷 289, 期 4, 页码 423-431出版社
SPRINGER
DOI: 10.1007/s00396-010-2372-x
关键词
Organic/inorganic hybrids; Polymer composite; Organically modified titania; Lanthanide ions; Chemical bonding assembly; Photoluminescence
资金
- National Natural Science Foundation of China [20971100]
- Program for New Century Excellent Talents in University (NCET) [2008-08-0398]
Nicotinic acid (NA) is grafted to titanium alkoxide to achieve functional precursor Ti-NA, which then is coordinated to lanthanide ions (Tb3+/Eu3+) to prepare the binary titania hybrid materials Ti-NA-Eu/Ti-NA-Tb via a sol-gel process in the presence of water. Furthermore, two types of ternary titania hybrid materials, Ti-NA-Ln-PMAA/Ti-NA-Ln-PVP, are assembled by the introduction of the organic polymers polymethacrylic acid (PMAA)/polyvinylpyrrolidone (PVP) into the above system. The FTIR spectra of these titania hybrid materials confirm their basic composition, and the X-ray diffraction patterns reveal that they are amorphous. Luminescence spectra and lifetimes of these titania hybrids are recorded, revealing that these hybrid materials with organic polymers exhibit longer luminescence lifetimes and higher quantum efficiencies.
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