Effect of different titania phases on the hydrogen gas sensing features of polyaniline/TiO2 nanocomposite

In the present work, Polyaniline (PANI) and Polyaniline-Titanium dioxide (PANI-TiO 2 ) composite have been synthesized separately by chemical polymerization of aniline without/with TiO 2 . Characteristic absorption bands of PANI and TiO 2 in the composite were confirmed by FT-IR studies, indicating the interaction of PANI with TiO 2 . Comparative study of XRD patterns of PANI and the composite confirmed superficial deposition of PANI on TiO 2 and the average size of the composite particle was found to be 25 nm. The aggregated granular porous morphology of the composite was confirmed by its SEM image. The composite's sensing response to humidity at room temperature was tested and was found to be 84.21 % in the range 25 % -95 % RH. The response and recovery time of the composite at 95 % RH were measured to be 60s and 100s respectively and its sensing stability over a period of one month was also confirmed.

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“…870710 were confirmed to be of rutile TiO 2 . The same pattern for TiO 2 has also been confirmed in previous literatures [29,30].…”

Section: X-ray Diffractionsupporting

confidence: 89%

Polyaniline-Titanium dioxide composite as humidity sensor at room temperature

Kotresh¹,

Ravikiran²,

Raj³

et al. 2016

Nanosystems: Phys. Chem. Math.

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“…The polymerization was allowed to proceed for 2 h at 25 °C. The Reaction mixture was filtered under gravity, and washed with 2.0 M HCl and de‐ionized water, After wards dried at 60 °C for 24 h under vacuum to obtain a fine tint green powder …”

Section: Methodsmentioning

confidence: 99%

Synthesis, Characterization of Titania/Polyaniline/GO Nanocomposites, and Its Photocatalytic Activity Under UV‐Visible Light

Kumar

Pandey

2018

Macromolecular Symposia

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In the present study, to prepare the TiO2, TiO2/PAni, and TiO2/PAni/GO nanocomposites wet chemical method and they are used as photocatalyst for the photodegradation of Vitoria Blue B dye. The prepared TiO2, TiO2/PAni, and TiO2/PAni/GO are subjected to XRD analysis, which gives the information about the presence of phase rutile and anatase both phases are present in the samples. The SEM and TEM of the prepared samples are shown in the particles morphology. The prepared samples are found in nanodiamension. The Photocatalytic degradation of Vitoria Blue B dye is done at different condition of concentration of dye, time of illumination pH, and dose of photocatalyst. The % photodegradation efficiency of Vitoria Blue B dye occur efficiently with TiO2, TiO2/PAni, and TiO2/PAni/GO and highest for TiO2/PAni/GO.

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“…The xanthene dyes are mostly used in textile industries. Xanthene dyes can be characterized by the presence of xanthenes nucleus with aromatic groups as chromophore [4,5]. Rose Bengal is a significant xanthene dye and widely used in textile and photochemical industries whose molecular structure as shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

“…TiO 2 photocatalyst has been applied to selfcleaning glasses, antibacterial tiles etc. as it has the strong oxidizing power to decompose most organic compounds to CO 2 [5].…”

Section: Introductionmentioning

confidence: 99%