Non-purified commercial multiwalled carbon nanotubes supported on electrospun polyacrylonitrile@polypyrrole nanofibers as photocatalysts for water decontamination

Capilli, Gabriele; Sartori, Damián Ezequiel Rodríguez; González, Mónica C.; Laurenti, Enzo; Minero, Claudio; Calza, Paola

doi:10.1039/d0ra10930d

Cited by 8 publications

(8 citation statements)

References 55 publications

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“…In this device, dissolved oxygen in water reacts with photoexcited electrons on PPy and other pollutants are degraded by radicals generated by charge-carrying "holes" on the carbon nanotubes [271]. In situ polymerized PEDOT on TiO 2 nanofibers have been found to improve the photocatalytic performance of bare TiO 2 and induce the degradation of the model pharmaceutical contaminant phenazopyridine in water [272].…”

Section: Water Purificationmentioning

confidence: 99%

Electrospun Conducting Polymers: Approaches and Applications

2022

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Inherently conductive polymers (CPs) can generally be switched between two or more stable oxidation states, giving rise to changes in properties including conductivity, color, and volume. The ability to prepare CP nanofibers could lead to applications including water purification, sensors, separations, nerve regeneration, wound healing, wearable electronic devices, and flexible energy storage. Electrospinning is a relatively inexpensive, simple process that is used to produce polymer nanofibers from solution. The nanofibers have many desirable qualities including high surface area per unit mass, high porosity, and low weight. Unfortunately, the low molecular weight and rigid rod nature of most CPs cannot yield enough chain entanglement for electrospinning, instead yielding polymer nanoparticles via an electrospraying process. Common workarounds include co-extruding with an insulating carrier polymer, coaxial electrospinning, and coating insulating electrospun polymer nanofibers with CPs. This review explores the benefits and drawbacks of these methods, as well as the use of these materials in sensing, biomedical, electronic, separation, purification, and energy conversion and storage applications.

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Section: Water Purificationmentioning

confidence: 99%

Electrospun Conducting Polymers: Approaches and Applications

2022

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“…A list of the composites used in the recent literature includes: graphitic carbon/reduced graphene oxide composites [ 119 ]; multiwall carbon nanotubes/polyacrylonitrile [ 139 ]; silver/tin oxide [ 120 ]; titanium dioxide/Cu-MOF [ 91 ]; titanium dioxide/graphene oxide [ 140 ]; zinc oxide/activated carbon [ 72 ]; zinc oxide/cellulose acetate [ 141 , 142 ]; zinc oxide/copper [ 143 ]; or zinc oxide/magnetite [ 19 ].…”

Section: Polypyrrole Photocatalystsmentioning

confidence: 99%

Recent Advances in the Removal of Organic Dyes from Aqueous Media with Conducting Polymers, Polyaniline and Polypyrrole, and Their Composites

Stejskal

2022

Polymers

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Water pollution by organic dyes, and its remediation, is an important environmental issue associated with ever-increasing scientific interest. Conducting polymers have recently come to the forefront as advanced agents for removing dye. The present review reports on the progress represented by the literature published in 2020–2022 on the application of conducting polymers and their composites in the removal of dyes from aqueous media. Two composites, incorporating the most important polymers, polyaniline, and polypyrrole, have been used as efficient dye adsorbents or photocatalysts of dye decomposition. The recent application trends are outlined, and future uses also exploiting the electrical and electrochemical properties of conducting polymers are offered.

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“…The other two peaks are related to C−N/C−O/C�N + /C�N and the π−π* shakeup, respectively, at 286.2 and 288.1 eV. 37,47 Figure 2f exhibits the N 1s core level's deconvolution for the PNC4 composite. Among the four components, the peak at 399.9 eV, with the highest intensity corresponding to the N−H structure in the PPy ring, indicates neutral nitrogen content.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Moreover, another peak at 401.2 eV corresponds to C−N + due to the positively charged nitrogen polarons. 37,47…”

Section: ■ Introductionmentioning

confidence: 99%

Photocatalytic Solar Hydrogen Generation by SWCNT-Supported Nickel Oxide Nanoparticles Wrapped by Polypyrrole

Chakraborty,

Sarkar,

Ahamed

et al. 2024

ACS Appl. Eng. Mater.

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High-performance and noble metal-free green hydrogen generation from water by photocatalysis is a reliable and sustainable approach to solving energy and environmental problems. We report a study on a hybrid nanocomposite photocatalyst of polypyrrole (PPy), nickel [nickel oxide (NiO)], and single-walled carbon nanotubes (SWCNTs) that was produced cost-effectively. The optimal design of the catalyst with the incorporation of 4 wt % of SWCNTs is sensitive to the crystallite size and lattice strain, which tune the optical energy gap for solar irradiation activity. Also, NiO acts as a conducting channel between the PPy-coated SWCNTs, facilitating high charge transportability. The photoexcited charge separation efficiency is accelerated in the presence of SWCNTs. Finally, cooperative agreement on the energy levels of the individual component promotes remarkable hydrogen (H 2 ) generation, harnessing the full band spectrum of simulated sunlight in the presence of only 1 vol % methanol as a photosensitizer. The solar H 2 evolution rate is improved by factors of 22.4 and 5.6 compared to that of the pristine PPy and PPy-NiO (PNC0) hybrid. This work delivers a facile and simple approach to developing a highly efficient noble metal-free carbon-based organic− inorganic composite system for solar photocatalytic H 2 generation.

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Non-purified commercial multiwalled carbon nanotubes supported on electrospun polyacrylonitrile@polypyrrole nanofibers as photocatalysts for water decontamination

Abstract: Under UV-Vis irradiation, the metallic impurities embedded in non-purified commercial carbon nanotubes generate radicals suitable for advanced oxidation processes. Semiconducting PPY membranes enhance the photo activity of a supported catalyst.

Cited by 8 publications

References 55 publications

Electrospun Conducting Polymers: Approaches and Applications

Electrospun Conducting Polymers: Approaches and Applications

Recent Advances in the Removal of Organic Dyes from Aqueous Media with Conducting Polymers, Polyaniline and Polypyrrole, and Their Composites

Photocatalytic Solar Hydrogen Generation by SWCNT-Supported Nickel Oxide Nanoparticles Wrapped by Polypyrrole

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