NDLI: Facile Synthesis of the Composites of Polyaniline and TiO2 Nanoparticles Using Self-Assembly Method and Their Application in Gas Sensing

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Facile Synthesis of the Composites of Polyaniline and TiO2 Nanoparticles Using Self-Assembly Method and Their Application in Gas Sensing

Content Provider	Semantic Scholar
Author	Yin, Changqing Luo, Yuanyuan Duan, Guotao
Copyright Year	2019
Abstract	The composites of polyaniline and TiO₂ nanoparticles with different contents were prepared in the aqueous solution of phosphoric acid, in which the phosphoric acid was selected as the protonic acid to improve the conductivity of polyaniline. In the composites, the TiO₂ nanoparticles with the size of about 20 nm were coated by a layer of polyaniline film with a thickness of about 5 nm. Then, the gas sensors were constructed by a liquid⁻gas interfacial self-assembly method. The gas-sensing properties of the composites-based gas sensors obviously improved after doping with TiO₂ nanoparticles, and the sensor response of the composites increased several times to NH₃ from 10 ppm to 50 ppm than that of pure polyaniline. Especially when the mass ratio of TiO₂ to aniline monomer was 2, it exhibited the best gas response (about 11.2⁻50 ppm NH₃), repeatability and good selectivity to NH₃ at room temperature. The p⁻n junction structure consisting of the polyaniline and TiO₂ nanoparticles played an important role in improving gas-sensing properties. This paper will provide a method to improve the gas-sensing properties of polyaniline and optimum doping proportion of TiO₂ nanoparticles.
File Format	PDF HTM / HTML
DOI	10.3390/nano9040493
PubMed reference number	30935021
Journal	Medline
Volume Number	9
Alternate Webpage(s)	https://susy.mdpi.com/user/review/displayFile/7429387/7NLpCWIO?coverletter=&file=review&report=3826818
Alternate Webpage(s)	https://res.mdpi.com/nanomaterials/nanomaterials-09-00493/article_deploy/nanomaterials-09-00493.pdf?attachment=1&filename=
Alternate Webpage(s)	https://susy.mdpi.com/user/review/displayFile/7475809/68WIuJMP?file=author-coverletter&report=3848902
Alternate Webpage(s)	https://doi.org/10.3390/nano9040493
Journal	Nanomaterials
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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