Robust optical and electrical properties of $$\hbox {TiO}_{2}$$-sensitized polymeric $$(\hbox {PANI}$$–$$\hbox {TiO}_{2})$$ nanocomposites for hybrid solar cell application

Singh, Rajinder; Choudhary, R. N. P.; Kandulna, R.

doi:10.1007/s12034-019-1891-4

Cited by 3 publications

(4 citation statements)

References 32 publications

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“…The latter effect is more marked in the presence of UV irradiation, in accordance with the literature reporting an increased omniphilicity of light-irradiated TiO2 [68]. This initial step is crucial to promote the final PANI crystallinity and porous morphology, which can be related to the controlled and oriented growth of the oligomer chains at the oxide surface, explaining the unique crystallinity degree of our samples with respect to literature composites [28,36,37,39,40].…”

Section: Discussionsupporting

confidence: 91%

“…The presence of well defined peaks due to crystalline PANI phases, which are far less resolved in both PANI_ref [14] and in PANI from oxidative aniline polymerization [35], is indicative of a more ordered arrangement of the polymer chains in the composite samples with respect to pure PANI. It should be noted that our composites are far more crystalline than PANI composites prepared via traditional oxidative polymerization in the presence of TiO 2 or even other oxides [28,[36][37][38][39][40]. This observation supports the occurrence, in the present case, of a different reaction mechanism promoted by the photocatalytic properties of the oxide semiconductor under UV irradiation.…”

Section: Structural Propertiessupporting

confidence: 82%

“…PANI-TiO 2 nanocomposites prepared via UV-light mediated green procedure were here studied and applied to pollutant removal in water. The preparation of PANI-TiO 2 composites has been quite extensively reported in the literature by using both preformed particles and TiO 2 sols/gels [12,29,37,38,75,76]. However, the present synthesis differs from the state-of-the-art as the photocatalytic activity of TiO 2 is directly exploited to initiate a green polymerization process, leading to materials with unique properties.…”

Section: Discussionmentioning

confidence: 99%

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Photocatalytic and Oxidative Synthetic Pathways for Highly Efficient PANI-TiO2 Nanocomposites as Organic and Inorganic Pollutant Sorbents

et al. 2020

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Polyaniline (PANI)-materials have recently been proposed for environmental remediation applications thanks to PANI stability and sorption properties. As an alternative to conventional PANI oxidative syntheses, which involve toxic carcinogenic compounds, an eco-friendly procedure was here adopted starting from benign reactants (aniline-dimer and H2O2) and initiated by ultraviolet (UV)-irradiated TiO2. To unlock the full potential of this procedure, we investigated the roles of TiO2 and H2O2 in the nanocomposites synthesis, with the aim of tailoring the properties of the final material to the desired application. The nanocomposites prepared by varying the TiO2:H2O2:aniline-dimer molar ratios were characterized for their thermal, optical, morphological, structural and surface properties. The reaction mechanism was investigated via mass analyses and X-ray photoelectron spectroscopy. The nanocomposites were tested on both methyl orange and hexavalent chromium removal. A fast dye-sorption was achieved also in the presence of interferents and the recovery of the dye was obtained upon eco-friendly conditions. An efficient Cr(VI) abatement was obtained also after consecutive tests and without any regeneration treatment. The fine understanding of the reaction mechanism allowed us to interpret the pollutant-removal performances of the different materials, leading to tailored nanocomposites in terms of maximum sorption and reduction capability upon consecutive tests even in simulated drinking water.

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Section: Discussionsupporting

confidence: 91%

Section: Structural Propertiessupporting

confidence: 82%

Section: Discussionmentioning

confidence: 99%

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Photocatalytic and Oxidative Synthetic Pathways for Highly Efficient PANI-TiO2 Nanocomposites as Organic and Inorganic Pollutant Sorbents

et al. 2020

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“…The (ππ) and (ππ*) orbitals serve the role of valence and conduction bands, respectively. The energy difference between (ππ) and (ππ*) is termed as the band gap for the polymer [38][39][40]. Au NPs were electrodeposited via CV on PANI and PANIep.…”

Section: Electrochemical Characterization Of Electropolymerized Polya...mentioning

confidence: 99%

Chronoamperometric Ammonium Ion Detection in Water via Conductive Polymers and Gold Nanoparticles

Farina,

Scalese,

Corso

et al. 2024

Molecules

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Monitoring of ammonium ion levels in water is essential due to its significant impact on environmental and human health. This work aims to fabricate and characterize sensitive, real-time, low-cost, and portable amperometric sensors for low NH4+ concentrations in water. Two strategies were conducted by cyclic voltammetry (CV): electrodeposition of Au nanoparticles on a commercial polyaniline/C electrode (Au/PANI/C), and CV of electropolymerized polyaniline on a commercial carbon electrode (Au/PANIep/C). Au NPs increase the electrical conductivity of PANI and its ability to transfer charges during electrochemical reactions. The electrode performances were tested in a concentration range from 0.35 µM to 7 µM in NH4+ solution. The results show that the Au/PANI/C electrode performs well for high NH4+ concentrations (0.34 µM LoD) and worsens for low NH4+ concentrations (0.01 µM LoD). A reverse performance occurs for the electrode Au/PANIep/C, with a 0.03 µM LoD at low NH4+ concentration and 0.07 µM LoD at high NH4+ concentration. The electrodes exhibit a good reproducibility, with a maximum RSD of 3.68% for Au/PANI/C and 5.94% for Au/PANIep/C. In addition, the results of the repeatability tests show that the electrochemical reaction of sensing is fully reversible, leaving the electrode ready for a new detection event.

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Versatile materials for energy devices and systems

Kausar

2021

Conducting Polymer-Based Nanocomposites

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Robust optical and electrical properties of $$\hbox {TiO}_{2}$$-sensitized polymeric $$(\hbox {PANI}$$–$$\hbox {TiO}_{2})$$ nanocomposites for hybrid solar cell application

Cited by 3 publications

References 32 publications

Photocatalytic and Oxidative Synthetic Pathways for Highly Efficient PANI-TiO2 Nanocomposites as Organic and Inorganic Pollutant Sorbents

Photocatalytic and Oxidative Synthetic Pathways for Highly Efficient PANI-TiO2 Nanocomposites as Organic and Inorganic Pollutant Sorbents

Chronoamperometric Ammonium Ion Detection in Water via Conductive Polymers and Gold Nanoparticles

Versatile materials for energy devices and systems

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