Hybrid composite materials of anatase titania and conducting polyaniline: properties and chemical sensor application

被引:0
作者
Subramanian, E. [1 ]
Ramalakshmi, R. Dhana [1 ]
Vijayakumar, N. [2 ]
Sivakumar, G. [3 ]
机构
[1] Manonmaniam Sundaranar Univ, Dept Chem, Tirunelveli 627012, India
[2] Sri KGS Arts Coll, Dept Phys, Srivaikuntam 628619, Thoothukudi, India
[3] Annamalai Univ, Dept Phys, CISL, Annamalainagar 608002, Tamil Nadu, India
关键词
Polyaniline; Titania; Hybrid composites; Chemical sensor; TIO2; NANOPARTICLES; OXIDATIVE POLYMERIZATION; POLY(VINYL PYRROLIDONE); SOLAR-CELLS; NANOCOMPOSITES; IRRADIATION; POLYMERS; NANORODS; BEHAVIOR; ANILINE;
D O I
暂无
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This paper reports the investigation on synthesis, properties and chemical sensor application of polyaniline (PANI) - anatase titania (TiO2) hybrid composite materials prepared in the presence and absence of the soft template poly (vinyl alcohol) (PVA). FTIR spectroscopy reveals that PVA favors oxidation of large amount of aniline during PANT synthesis and causes production of more number of quinoid groups than benzenoid, but TiO2 maintains an equal level of quinoid and benzenoid. XRD study shows that PVA influences the d-space and crystallite size more in PANI-PVA and less in PANI-TiO2-PVA composite. In morphology, PANI-TiO2 has submicron particles and shows less agglomeration while PANI-TiO2-PVA has extensive agglomeration and surface smoothness. In chemical sensor application, PANI senses CH3OH vapor with a decrease of its conductivity and with an efficiency of 56%. However, with the inclusion of TiO2 or PVA, the sensor efficiency of PANT is shifted from CH3OH to CH2Cl2. Interestingly with both TiO2 and PVA inclusion, the material PANI-TiO2-PVA turns back its maximum sensor efficiency towards CH3OH but with an increase of its conductivity. All these results suggest that TiO2, PVA and TiO2-PVA exert different tuning roles on PANT yielding characteristically different hybrid materials.
引用
收藏
页码:237 / 244
页数:8
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