Article ID Journal Published Year Pages File Type
5188789 Polymer 2006 7 Pages PDF
Abstract
After TiO2 nanoparticles were surface modified, conductive polyaniline (PANI) layer was chemically grafted on the surface of the self-assembled monolayer (SAM) coated TiO2 nanoparticles, resulting in PANI/SAM-TiO2 composites. In the preparation process of the hybrid composites, γ-aminopropyltriethoxysilane was used as a coupling agent to form a dense aminopropylsilane monolayer with active sites for the graft polymerization of aniline. The resulted composite nanoparticles were characterized by using TEM, FTIR, TGA, and UV-vis-diffuse reflectance spectroscopy. The thermogravimetric analysis confirmed that the inserted SAM layer improved the thermal stability of the PANI-TiO2 nanocomposites. Compared with neat-TiO2 nanoparticles without any surface modification, moreover, the PANI/SAM-TiO2 nanocomposites showed better photocatalytic activity in photodegradation of methyl orange under sunlight, which was partly attributed to the sensitizing effect of PANI.
Related Topics
Physical Sciences and Engineering Chemistry Organic Chemistry
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