Resistive Gas Sensors Based on Porous Sp-Containing Films Obtained by Dehydrohalogenation of PVDC and PVDC-PVC Copolymer

Streletskiy, Oleg A.; Zavidovskiy, Ilya A.; Nuriahmetov, Islam F.; Nishchak, Olesya Y.; Pavlikov, Alexander V.; Savchenko, Natalya F.

doi:10.3390/c9030082

Cited by 3 publications

(1 citation statement)

References 60 publications

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“…To explore the adsorption mechanism, the ABLB4 sample was characterized with FTIR (Figure 4b). The peak observed at 1480 cm −1 is attributed to the stretching vibration of the C-O and C-H structures present in the alkene [49,50]. Similarly, the peak at 1040 cm −1 is assigned to the expansion and contraction of the C-O-C structure [51].…”

Section: Adsorption Mechanismmentioning

confidence: 97%

Exploring the Potential of Biochar Derived from Chinese Herbal Medicine Residue for Efficient Removal of Norfloxacin

Li,

Zhao,

Zhang

et al. 2024

Molecules

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One-step carbonization was explored to prepare biochar using the residue of a traditional Chinese herbal medicine, Atropa belladonna L. (ABL), as the raw material. The resulting biochar, known as ABLB4, was evaluated for its potential as a sustainable material for norfloxacin (NOR) adsorption in water. Subsequently, a comprehensive analysis of adsorption isotherms, kinetics, and thermodynamics was conducted through batch adsorption experiments. The maximum calculated NOR adsorption capacity was 252.0 mg/g at 298 K, and the spontaneous and exothermic adsorption of NOR on ABLB4 could be better suited to a pseudo-first-order kinetic model and Langmuir model. The adsorption process observed is influenced by pore diffusion, π–π interaction, electrostatic interaction, and hydrogen bonding between ABLB4 and NOR molecules. Moreover, the utilization of response surface modeling (RSM) facilitated the optimization of the removal efficiency of NOR, yielding a maximum removal rate of 97.4% at a temperature of 304.8 K, an initial concentration of 67.1 mg/L, and a pH of 7.4. Furthermore, the biochar demonstrated favorable economic advantages, with a payback of 852.5 USD/t. More importantly, even after undergoing five cycles, ABLB4 exhibited a consistently high NOR removal rate, indicating its significant potential for application in NOR adsorption.

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Section: Adsorption Mechanismmentioning

confidence: 97%

Exploring the Potential of Biochar Derived from Chinese Herbal Medicine Residue for Efficient Removal of Norfloxacin

Li,

Zhao,

Zhang

et al. 2024

Molecules

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Plasmonic gas sensors based on nanomaterials: mechanisms and recent developments

Vaidyanathan,

Mondal,

Rout

et al. 2024

J. Phys. D: Appl. Phys.

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Sensing devices for rapid analytics are important societal requirements, with wide applications in environmental diagnostics, food testing, and disease screening. Nanomaterials present excellent opportunities in sensing applications owing to their superior structural strength, and their electronic, magnetic, and optoelectronic properties. Among the various mechanisms of gas sensing, including chemiresistive sensors, electrochemical sensors, and acoustic sensors, another promising area in this field involves plasmonic sensors. The advantage of nanomaterial-plasmonic sensors lies in the vast opportunities for tuning the sensor performance by optimizing the nanomaterial structure, thereby producing highly selective and sensitive sensors. Recently, several novel plasmonic sensors have been reported, with various configurations such as nanoarray resonator-, ring resonator-, and fiber-based plasmonic sensors. Going beyond noble metals, some promising nanomaterials for developing plasmonic gas sensor devices include two-dimensional materials, viz. graphene, transition metal dichalcogenides, black phosphorus, blue phosphorus, and MXenes. Their properties can be tuned by creating hybrid structures with layers of nanomaterials and metals, and the introduction of dopants or defects. Such strategies can be employed to improve the device performance in terms of its dynamic range, selectivity, and stability of the response signal. In this review, we have presented the fundamental properties of plasmons that facilitate its application in sensor devices, the mechanism of sensing, and have reviewed recent literature on nanomaterial-based plasmonic gas sensors. This review briefly describes the status quo of the field and future prospects.

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Carbonized polyvinylidene difluoride films irradiated by variable-energy Ar+: Tunable morphology and resistive sensing

Nuriahmetov,

Zavidovskiy,

Khaidarov

et al. 2024

Journal of Vacuum Science &Amp; Technology B

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In this work, resistive gas sensors based on dehydrohalogenated polyvinylidene difluoride irradiated by variable-energy (500–900 eV) Ar+ ions were investigated. The resulting ion-irradiated polyene-based films were investigated by scanning electron microscopy, energy dispersive x-ray spectroscopy, and Raman spectroscopy. The polyene-based structure was analyzed, and the variation in the films’ morphology, ordering, and graphitization degree with ion energy change was assessed. The resistive sensing response of the obtained composites to ammonia and ethanol was analyzed, revealing the energy- and analyte-dependent shift between positive and negative sensing responses. That allowed us to confirm that the sensing mechanism of the investigated structures is governed by electron or hole transfer induced by the interaction of vapor and the material, which results in various types of responses for the structures with n- and p-type conductivity.

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Resistive Gas Sensors Based on Porous Sp-Containing Films Obtained by Dehydrohalogenation of PVDC and PVDC-PVC Copolymer

Cited by 3 publications

References 60 publications

Exploring the Potential of Biochar Derived from Chinese Herbal Medicine Residue for Efficient Removal of Norfloxacin

Exploring the Potential of Biochar Derived from Chinese Herbal Medicine Residue for Efficient Removal of Norfloxacin

Plasmonic gas sensors based on nanomaterials: mechanisms and recent developments

Carbonized polyvinylidene difluoride films irradiated by variable-energy Ar+: Tunable morphology and resistive sensing

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