Sudhir Kumar Nema's research while affiliated with Homi Bhabha National Institute and other places
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Publications (9)
This study explores a green pathway for urea synthesis using plasma-ice interaction with gas mixtures of N2 + CO2 and NH3 + CO2. Electrical and optical emission spectroscopy were employed to characterize the plasmas, revealing that urea formation involves complex reactions driven by high-energy species, producing reactive nitrogen and carbon interm...
This study presents a novel and ecofriendly method for synthesizing ammonium nitrate using activated prepared through air and ammonia plasma treatments. Initially, PAW containing nitrate ions is produced by treating water with air plasma. This PAW air is then frozen and exposed to low pressure NH$_3$ plasma, introducing ammonium ions to from NH$_4$...
The study investigates the potential of Plasma-Activated Water (PAW) as a nitrogen supplement in hydroponic cultivation (HS-N+PAW), specifically focusing on radish seed germination and plant growth. PAW, produced using a dielectric barrier discharge pencil plasma jet using air as plasma forming gas, is compared against conventional hydroponic solut...
This study focuses on large-scale production of plasma-activated water (PAW) using batch processes with circulating and non-circulating modes. A multi-plasma device setup, powered by a self-developed high-voltage high-frequency supply. This plasma is electrically characterized and the produced radicals/species are identified using emission spectros...
The dye degradation efficacy of the cold plasma pencil jet is presented in the present investigation. Dye degradation studies were performed using air plasma, six different types of selected dyes (erythrosine, metanil yellow, sudan I, crystal violet, rhodamine B, and Indigo). The degradation of dyes is analyzed using UV visible spectroscopy, total...
In the present study, the efficacy of a nonthermal pencil plasma jet (NT-PPJ) producing arc plasma in degrading antibiotic drugs in artificial wastewater is investigated. Air is used as the plasma-forming gas. The plasma is electrically characterized, and the generated plasma species and radicals are identified using optical emission spectroscopy....
This study investigates the impact of Plasma-Activated Water (PAW) washing and storage on the shelf life of Night-Blooming Jasmine (NBJ) flowers (Cestrum nocturnum L.). NBJ flowers, known for their fragrant properties and diverse applications, have a short natural shelf life. PAW is generated using a pencil plasma jet with varying plasma treatment...
The study explores the effectiveness of plasma washing as an environmentally sustainable method for fabric stain removal. Utilizing a dielectric barrier discharge pencil plasma jet (DBD-PPJ) with air as the plasma-forming gas, we assessed its stain removal efficacy on various stains (ink, turmeric, mud/soil, grass, coffee, and oil) on white cotton...
Citations
... Π g ), N 2 + first negative system (FNS) (B 2 Σ u + → X 2 Σ g + ) and CO + (A 2 Π → X 2 Σ), etc. transition(38)(39)(40)(41)(42)(43)(44). Among these, the emission band peaks of N 2 + FNS are significantly more intense.In both N 2 + CO 2(Figure 3(a)) and NH 3 + CO 2(Figure 3(b)) plasmas, the formation of these excited states and transitions occurs through processes such as electron impact excitation, ...
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... These high-energy species can induce chemical reactions that are not feasible under normal conditions. Plasma-liquid interactions have shown considerable potential in various fields, including microbial inactivation, food preservation, pesticide reduction, liquid fertilizer, seed germination, plant growth, selective killing of cancer cells, wound healing, and wastewater treatment, etc. (15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33) The interaction between plasma and liquids can generate reactive species that facilitate complex chemical reactions, potentially leading to more efficient and environmentally friendly processes (33)(34)(35)(36). ...
... These high-energy species can induce chemical reactions that are not feasible under normal conditions. Plasma-liquid interactions have shown considerable potential in various fields, including microbial inactivation, food preservation, pesticide reduction, liquid fertilizer, seed germination, plant growth, selective killing of cancer cells, wound healing, and wastewater treatment, etc. (15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33) The interaction between plasma and liquids can generate reactive species that facilitate complex chemical reactions, potentially leading to more efficient and environmentally friendly processes (33)(34)(35)(36). ...
