Journal
NANOSCALE
Volume 5, Issue 18, Pages 8703-8710Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3nr02502k
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Funding
- Natural Science Foundation of China [51178213, 51238002, 51272099, 51008149, 51266011]
- Program for New Century Excellent Talents in University [NCET-11-1004]
- Cultivating Program for Young Scientists of Jiangxi Province of China [20112BCB 23016]
- Natural Science Foundation of Jiangxi Province [20122BAB213014, 20114BAB203018]
- Department of Education Fund of Jiangxi Province [GJJ13506, GJJ11508]
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Conductive polypyrrole-polyaniline/TiO2 nanocomposites (PPy-PANI/TiO2) were prepared by in situ oxidative copolymerization of pyrrole and aniline monomers in the presence of TiO2. For comparison studies, polypyrrole/TiO2 (PPy/TiO2) and polyaniline/TiO2 (PANI/TiO2) were also prepared. The samples were characterized by X-ray diffraction, transmission electron microscopy, UV-vis diffuse reflectance spectroscopy, zeta potential analysis, Fourier transform infrared spectroscopy, thermogravimetric analysis and photocurrent tests. In contrast to PPy/TiO2 and PANI/TiO2, PPy-PANI/TiO2 exhibits obvious absorption in the visible-light range, and is much superior to PPy/TiO2 and PANI/TiO2 in thermal stability. It is found that PPy-PANI/TiO2 performs well in the visible-light photocatalytic degradation of 4-nitrophenol. The optimized pyrrole : aniline : TiO2 molar ratio for best performance is 0.75 : 0.25 : 100. The efficacy of PPy-PANI/TiO2 is attributed to its conductivity, conjugated structure, as well as to the synergy amidst polypyrrole, polyaniline and TiO2.
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