Spectrochemical Analysis of Ozone Density for Pulsed Plasma Discharge in Oxygen–Water Mixture

Farooq, Muhammad; Khan, Muhammad Ibrahim; Rehman, N. U.

doi:10.1007/s11090-022-10260-4

Cited by 5 publications

(1 citation statement)

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“…Moreover, the bio-relevant targets which are used in treatment are quite complex due to various unmeasured and mysterious variables. − However, atmospheric pressure plasma comprises of reactive nitrogen and oxygen species (RNOS), having gas temperature close to ambient temperature, and is suitable for biomedical applications. − In addition to RNOS, UV radiation and transient electric fields are also likely important in plasma-based disinfection. − Tuning of these parameters at ambient temperature is always a challenge due to high electron neutral collision rates. Numerous atmospheric pressure devices have been developed to generate the room temperature plasma for medical and industrial applications. − Investigation on plasma devices emphasizing on biomedical applications has shown that plasma devices can be economical and convenient . In these devices, discharge parameters influence the biological sample, which can be controlled via plasma parameters like input power, treatment time, treatment distance, feed gas composition, and mode of operation …”

Section: Introductionmentioning

confidence: 99%

Metrology of Ar–N₂/O₂ Mixture Atmospheric Pressure Pulsed DC Jet Plasma and its Application in Bio-Decontamination

et al. 2023

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Atmospheric pressure plasma jets are gaining a lot of attention due to their widespread applications in the field of bio-decontamination, polymer modification, material processing, deposition of thin film, and nanoparticle fabrication. Herein, we are reporting the disinfection of Pseudomonas aeruginosa, Staphylococcus aureus, and Escherichia coli bacteria using plasma jet. In this regard, Ar–O2, Ar–N2, and Ar–O2–N2 mixture plasma is generated and characterized using optical and electrical characterization. Variation in plasma parameters like electron temperature, electron density, and reactive species production is monitored with discharge parameters such as applied voltage and feed gas concentration. Results show that the peak average power consumed in Ar–O2, Ar–N2, and Ar–O2–N2 mixture plasma is found to be 4.45, 2.93, and 4.35 W respectively, at 8 kV. Moreover, it is noted that by increasing applied voltage, the electron temperature, electron density, and reactive species production also increases. It is worth noting that electron temperature increases with increase in oxygen concentration in the mixture ( , while it decreases with increase in nitrogen concentration in the mixture (Ar–N2). Similarly, a decreasing trend in electron temperature is noted for Ar–O2–N2 mixture plasma. On the other hand, a decreasing trend in electron density is noted for all the mixtures. Reduction in viable colonies of Pseudomonas aeruginosa, Staphylococcus Aureus, and Escherichia coli were confirmed by the serial dilution method. The inactivation efficiency of pulsed DC plasma generated, in the Ar–N2 mixture at 8 kV and 6 KHz, was evaluated against P. aeruginosa, S. aureus and E. coli bacteria by measuring the number of surviving cells versus plasma treatment time. Results showed that after 240 s of plasma treatment, the number of survival colonies of the mentioned bacteria was reduced to less than 30 CFU/mL.

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Section: Introductionmentioning

confidence: 99%

Metrology of Ar–N₂/O₂ Mixture Atmospheric Pressure Pulsed DC Jet Plasma and its Application in Bio-Decontamination

et al. 2023

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Efficacy of Plasma Enhanced Advanced Oxidation Processes for Decontamination of Water Containing Arsenic

Farooq,

Rasheed,

Rehman

2023

Plasma Chem Plasma Process

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Plasma-assisted synthesis of gold-silver core-shell nanoparticles and their enhanced catalytic dye degradation and surface enhanced Raman spectroscopy performance

Ismail,

Ahmed,

Farooq

et al. 2024

Journal of Vacuum Science &Amp; Technology B

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The plasma-liquid interaction (PLI) technique has been employed as a green approach for the synthesis of gold-silver core-shell nanoparticles (Au@AgNPs) using a two-step method. In the first step, the Au seed particles were grown by the PLI technique. Subsequently, the formation of Ag shell was achieved by adding AgNO3 to the solution containing Au seeds and placing it under the atmospheric pressure plasma. The growth of Ag shell on Au seeds was optimized and secondary nucleation was avoided by tuning the discharge current, precursor concentration, and stabilizer (d-fructose) concentration. The shell thickness of Ag was also changed by changing the concentration of AgNO3 in the solution. UV-Vis spectroscopy, scanning electron microscopy, and energy-dispersive x-ray spectroscopy were used to analyze the synthesized nanoparticles. Furthermore, the particles were employed for catalysis and surface enhanced Raman spectroscopy (SERS)-based molecular trace detection. The catalytic efficiency of the NPs was investigated for the reduction of four molecules, i.e., 4-nitrophenol, methyl orange, Congo red, and rhodamine B. The SERS-based trace detection was studied for rhodamine 6G using the substrates of synthesized NPs. In both cases, core-shell nanoparticles showed far superior performance compared to the seed Au nanoparticles.

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Spectrochemical Analysis of Ozone Density for Pulsed Plasma Discharge in Oxygen–Water Mixture

Cited by 5 publications

References 50 publications

Metrology of Ar–N₂/O₂ Mixture Atmospheric Pressure Pulsed DC Jet Plasma and its Application in Bio-Decontamination

Metrology of Ar–N₂/O₂ Mixture Atmospheric Pressure Pulsed DC Jet Plasma and its Application in Bio-Decontamination

Efficacy of Plasma Enhanced Advanced Oxidation Processes for Decontamination of Water Containing Arsenic

Plasma-assisted synthesis of gold-silver core-shell nanoparticles and their enhanced catalytic dye degradation and surface enhanced Raman spectroscopy performance

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Spectrochemical Analysis of Ozone Density for Pulsed Plasma Discharge in Oxygen–Water Mixture

Cited by 5 publications

References 50 publications

Metrology of Ar–N2/O2 Mixture Atmospheric Pressure Pulsed DC Jet Plasma and its Application in Bio-Decontamination

Metrology of Ar–N2/O2 Mixture Atmospheric Pressure Pulsed DC Jet Plasma and its Application in Bio-Decontamination

Efficacy of Plasma Enhanced Advanced Oxidation Processes for Decontamination of Water Containing Arsenic

Plasma-assisted synthesis of gold-silver core-shell nanoparticles and their enhanced catalytic dye degradation and surface enhanced Raman spectroscopy performance

Contact Info

Product

Resources

About

Metrology of Ar–N₂/O₂ Mixture Atmospheric Pressure Pulsed DC Jet Plasma and its Application in Bio-Decontamination

Metrology of Ar–N₂/O₂ Mixture Atmospheric Pressure Pulsed DC Jet Plasma and its Application in Bio-Decontamination