Ternary system of TiO2 confined chitosan–polyaniline​ heterostructure photocatalyst for the degradation of anionic and cationic dyes

Sirajudheen, P.; Chola, Resha Kasim Vellattu; Vigneshwaran, Sivakumar; Poovathumkuzhi, Nabeena Chettithodi; Chelaveettil, Basheer Meethale; Meenakshi, Sankaran

doi:10.1016/j.eti.2022.102586

Cited by 19 publications

(2 citation statements)

References 40 publications

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“…There are two kinds of photocatalysis reactions: heterogeneous photocatalysis and homogeneous photocatalysis. 46,[120][121][122][123] The PANI/KNO composites have heterogeneous photocatalysis that involves reactors and catalysts in different phases. The heterogeneous photocatalysis is following Langmuir-Hinshelwood mechanism.…”

Section: Photocatalysismentioning

confidence: 99%

Photocatalytic activity of polyaniline‐potassium doped nickel oxide nanocomposites: A comprehensive investigation on multifaceted properties

Bhankhar,

Saini,

Sehrawat

et al. 2024

J of Applied Polymer Sci

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Polyaniline‐potassium doped nickel oxide nanocomposites (PANI/KNO) were efficiently synthesized via an in situ chemical oxidation method, meticulously confirmed by comprehensive x‐ray diffraction, Fourier transformation infrared spectroscopy, energy dispersive x‐ray spectroscopy, selected area electron diffraction, and x‐ray photoelectron spectroscopy analyses. The crystallite size and strain exhibited distinct behaviors, while field emission scanning electron microscopy revealed a blend of irregular spherical shapes and nanofibers, further confirmed by high resolution transmission electron microscopy. These composites exhibited significantly enhanced thermal stability, surpassing PANI by 1.39 times, and showcased a band gap exceeding 3 eV, along with multiple photoluminescence peaks at room temperature (RT). Moreover, their RT AC conductivity experienced a remarkable surge by 4.91 times compared to pure polyaniline. Jonscher's Power Law model and the Havriliak–Negami relaxation model are employed to elucidate the electrical properties of composite materials. The composites displayed nonDebye relaxation behavior with increased conductivity, as observed through impedance analysis, electrical modulus evaluation, and dielectric constant assessment. Additionally, evident superparamagnetic properties and multiple magnetic domains further contributed to their effectiveness. The PANI/KNO composite demonstrated photocatalytic efficiency, achieving over 90% degradation of methylene blue dye across four cycles, thus highlighting its superior photostability. Furthermore, investigations into its response to pH variations and scavenger activity underscored its immense potential for highly effective photocatalytic applications.

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Section: Photocatalysismentioning

confidence: 99%

Photocatalytic activity of polyaniline‐potassium doped nickel oxide nanocomposites: A comprehensive investigation on multifaceted properties

Bhankhar,

Saini,

Sehrawat

et al. 2024

J of Applied Polymer Sci

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“…Such decreased catalytic activity has already been noticed in several investigations where the increase of target pollutant concentration leads to the adsorption of more and more molecules at the surface of the photocatalyst, causing a decrease in the light-harvesting ability and thus reduced photodegradation rate. The decreased photocatalytic activity may be due to (i) a very high concentration of dye molecules to serve as an inner filter that causes the diversion of incidence light photons at the catalyst surface, (ii) no or limited production of oxidative free radicals to participate in a catalyst mechanism, and (iii) blockage of active surface sites to participate in a catalytic reaction by the highly concentrated dye molecules [32]. Also, the results indicated that the Ce-TiO 2 /chitosan composite possessed a higher efficiency towards the RhB dye degradation under UV light irradiation than the corresponding Ce-TiO 2 and TiO 2 .…”

Section: Effect Of Catalyst Dose On the Photocatalytic Degradation Of...mentioning

confidence: 99%

Photocatalytic Efficacy and Degradation Kinetics of Chitosan-Loaded Ce-TiO2 Nanocomposite towards for Rhodamine B Dye

Clastin Indira,

Muthaian,

Pandi

et al. 2023

Catalysts

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The recent advancement in the production of nanomaterials with novel architectures and functionality has allowed for the effective treatment of industrial wastewaters and contaminated soil and, in that view, the current study aimed to investigate the catalytic efficacy of biopolymer-loaded titanium nanocomposite. Therefore, Cerium (Ce)-titanium dioxide (TiO2) loaded chitosan nanocomposite was formed and studied its catalytic efficacy towards the degradation of an industrial dye pollutant. For the production of Ce-TiO2/chitosan nanocomposite, we followed the hydrothermal synthesis route and the formed nanocomposite was thoroughly analyzed for the crystallinity (using powdered X-ray diffraction, XRD), surface bonding, and nature (using Fourier transform infrared, FTIR spectroscopy), morphology (scanning electron microscopy, SEM), elemental composition (electron diffraction analysis by X-rays, EDAX), porosity (Brunauer–Emmett–Teller, BET), and particles size in powdered form (transmission electron microscopy, TEM). Then the efficiency of synthesized nanocomposite was tested towards the photocatalytic degradation of Rhodamine B (Rh B) dye by applying various parameters such as the irradiation time, solution pH, catalyst dosage, and the dye concentration. Further, the Langmuir–Hinshelwood model was employed to investigate the kinetics of RhB degradation and provided a conceivable photocatalytic mechanism. It was indicated based on the catalyst mechanism that the modification of TiO2 nanoparticles with Ce and loading onto chitosan biopolymer may have accelerated the photocurrent transport due to an increase in the number of electrons and holes generated by the photon’s irradiation. In this way, the study has witnessed the excellent photocatalytic performance of Ce-TiO2/chitosan with 95% Rh B degradation as against the pure TiO2 nanoparticles thus stressing the importance of developing novel composite photocatalysts.

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Polymer-Based Hybrid Composites for Wastewater Treatment

Sodha,

Patel,

Jha

et al. 2023

Advances in Material Research and Technology

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Ternary system of TiO2 confined chitosan–polyaniline heterostructure photocatalyst for the degradation of anionic and cationic dyes

Cited by 19 publications

References 40 publications

Photocatalytic activity of polyaniline‐potassium doped nickel oxide nanocomposites: A comprehensive investigation on multifaceted properties

Photocatalytic activity of polyaniline‐potassium doped nickel oxide nanocomposites: A comprehensive investigation on multifaceted properties

Photocatalytic Efficacy and Degradation Kinetics of Chitosan-Loaded Ce-TiO2 Nanocomposite towards for Rhodamine B Dye

Polymer-Based Hybrid Composites for Wastewater Treatment

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Ternary system of TiO2 confined chitosan–polyaniline​ heterostructure photocatalyst for the degradation of anionic and cationic dyes

Cited by 19 publications

References 40 publications

Photocatalytic activity of polyaniline‐potassium doped nickel oxide nanocomposites: A comprehensive investigation on multifaceted properties

Photocatalytic activity of polyaniline‐potassium doped nickel oxide nanocomposites: A comprehensive investigation on multifaceted properties

Photocatalytic Efficacy and Degradation Kinetics of Chitosan-Loaded Ce-TiO2 Nanocomposite towards for Rhodamine B Dye

Polymer-Based Hybrid Composites for Wastewater Treatment

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Resources

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Ternary system of TiO2 confined chitosan–polyaniline heterostructure photocatalyst for the degradation of anionic and cationic dyes