Examining the use of TiO 2  to enhance the NH 3  sensitivity of polypyrrole films | Zendy

Wu Yan | Zendy; Xing Shuangxi | Zendy; Fu Jiacai | Zendy

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Examining the use of TiO 2 to enhance the NH 3 sensitivity of polypyrrole films

Author(s) -

Wu Yan,

Xing Shuangxi,

Fu Jiacai

Publication year - 2010

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.32382

Subject(s) - polypyrrole , materials science , polymerization , pyrrole , composite number , aqueous solution , monomer , titanium dioxide , thin film , ammonia , polymer chemistry , chemical engineering , conductive polymer , analytical chemistry (journal) , composite material , nanotechnology , polymer , chemistry , organic chemistry , engineering

Polypyrrole/Titanium dioxide (PPy/TiO 2 ) composite thin films were prepared by polymerizing the monomer pyrrole in aqueous solution containing a certain amount of TiO 2 particles at room temperature, and their response to ammonia (NH 3 ) gas was examined systematically. Compared with the pristine PPy film, which reached the saturation at the concentration of NH 3 beyond 200 ppm, the composite films showed more stable response and higher sensitivity. Furthermore, the PPy/TiO 2 composite thin films exhibited a low detection limit of 2 ppm. The film thickness, which had a strong influence on the film sensitivity to NH 3 , could be controlled by varying the polymerization time. The sensitivity to NH 3 gas of the samples with different content of TiO 2 and different molar ratio of PPy/TiO 2 /oxidant was studied. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

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