Activation of peroxodisulfate and peroxomonosulfate by green synthesized copper nanoparticles for Methyl Orange degradation: A kinetic study

Nagar, Niharika; Devra, Vijay

doi:10.1016/j.jece.2017.11.014

Cited by 39 publications

(12 citation statements)

References 43 publications

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“…The results indicate the degradation rate increased up to increase in 5 × 10 −5 mol dm −3 concentration of dye after that rate decreased with an increase in dye concentration ( Table 1 ). It may be at a constant concentration of PDS, the availability of SO 4 •− radicals are not sufficient to degrade dye molecules at higher concentration [24] .…”

Section: Resultsmentioning

confidence: 99%

“…Nanosized metal nanomaterials are drawing the devotion of present science field nanometer scale leads to particular intrinsic properties for the materials that render them very likely for application in catalysis [ 17 , 18 , 19 , 20 ]. Inorganic nanoparticles exhibit unique physical and chemical characteristics, creation to the development of novel applications in catalysis [ 21 , 22 , 23 , 24 , 25 ]. Silver nanoparticles are widely used and known applications in medical and pharmaceutical products and are hence directly encountered by the human system.…”

Section: Introductionmentioning

confidence: 99%

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A kinetic study on the degradation and biodegradability of silver nanoparticles catalyzed Methyl Orange and textile effluents

Nagar¹,

Devra²

2019

Heliyon

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The present study includes the Azadirachta indica (neem) induced Silver nanoparticles (AgNPs) by green synthesis as reducing and capping agent. Synthesized AgNPs were characterized by different instrumental techniques such as XRD (X-ray Diffraction), SEM (Scanning Electron Microscopy), TEM (Transmission Electron Microscopy), Zetasizer, UV-Visible and FT-IR (Fourier Transformation Infra-Red) spectroscopy. The result of XRD reveals that nanoparticles were crystalline in nature and pure, stability was determined by Zeta potential and SEM, TEM analysis indicates that AgNPs was monodisperse in a spherical shape with average size 9 nm. These synthesized AgNPs were applied as the catalyst in the degradation process of Methyl Orange (MO) and wastewater samples in presence of peroxodisulphate (PDS). Effect of different experimental conditions such as initial pH, concentration of PDS, Dye, and AgNPs was studied on the degradation process. The obtained kinetic result shows that AgNPs/PDS system induces 1.1 × 10−4 to 15.9 × 10−4 s-1 folds in presence of the small concentration of AgNPs (1 × 10−8 mol dm−3). The degradation of MO and real wastewater samples in AgNPs/PDS system is followed pseudo-first order kinetics and maximum degradation of MO reached 88% in 40 min and real wastewater samples in 80 min. Liquid chromatography-mass spectrometry (LC-MS) analysis and UV-Visible spectral changes were used to analyze the structure of intermediate and end products (CO2, H2O, NO3−, and O3S−) during the degradation process. Furthermore, the result of biodegradability index (greater than 0.3) implies that advanced oxidation process enhances the biodegradability of wastewater.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A kinetic study on the degradation and biodegradability of silver nanoparticles catalyzed Methyl Orange and textile effluents

Nagar¹,

Devra²

2019

Heliyon

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“…To demonstrate the catalytic activity, a graph is shown between the concentration of FeNPs and the rate constant obtained at three different temperatures. The graph shows that as the concentration of FeNPs increased, more active sites on the surface of Fe o were available for PMS to occupy, allowing for the generation of more reactive species (Figure 8) [28]. As a result, the rate of MG degradation was enhanced as the temperature increased.…”

Section: Fenps and Temperature Dependencementioning

confidence: 99%

“…Activated persulfate oxidation, one of the AOPs, has recently received a lot of attention because of the comparatively long lifetime of the sulfate radicals (SO 4 2-, E 0 = 2.5 -3.1 V) and the moderate reaction conditions [25]. Heat [26], ultrasound [27], and transition metal [28]-generated sulfate radicals are extremely powerful oxidizing species, as indicated by the fact that sulfate-containing compounds are the most effective oxidants. The catalytic activity and oxidation state of transition metals influence the formation of reactive species such as sulfate radicals.…”

Section: Introductionmentioning

confidence: 99%

Single-Step Green Synthesis of Iron Nanoparticles in the Aqueous Phase for Catalytic Application in Degradation of Malachite Green

Rathore¹,

Devra²

2021

Advanced Energy Conversion Materials

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The goal of the research was to devise a simple and environment-friendly approach to synthesize iron nanoparticles (FeNPs) and evaluate the catalytic activity of biosynthesized FeNPs for the degradation of the cationic dye Malachite Green (MG) in the presence of Peroxomonosulphate (PMS). Different instrumental approaches were used to characterize green produced FeNPs, and the results show that the NPs are spherical and 48 nm in size. Increasing the concentrations of nanoparticles (0.5 × 10-8 - 2.0 × 10-8 mol/dm3), Peroxomonosulphate (1.0 × 10-4 - 5.0 × 10-4 mol/dm3), dye (1.0 × 10-5 - 5.0 × 10-5 mol/dm3), pH (5), and high temperature (25-35 °C) enhanced the degradation kinetics of Pseudo-first-order kinetics were used to describe the degradation of MG in the FeNPs/PMS system, and activation parameters were derived. The maximum MG degrading efficiency for the FeNPs/PMS system was 88% in 60 minutes under optimum reaction conditions. The structure of intermediates formed by MG degradation by FeNPs/PMS was determined using UV-vis spectrum analysis. The application of synthesized FeNPs to improve Peroxomonosulphate oxidation potential for MG degradation is a unique, efficient, promising, and eco-friendly technology because it does not require any expensive reagents.

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“…It has been used as a medicinal plant for many years and has a wide range of biological activity. Terpenoids, nimbaflavone, sugar, and other biomolecules are present in neem leaves extract and are responsible for metal ion reduction with capping agents [15]. Using leaf extract from the Indian medicinal plant Azadirachta indica, we established a quick, eco-friendly, and convenient green route for the synthesis of FeNPs from their salt solution.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Green Synthesis of FeNPs using Azadirachta indica leaves

Devra¹,

Rathore²

2021

Preprint

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In the field of nanotechnology, developing an environmentally friendly method for the synthesis of iron nanoparticles (FeNPs) an important aspect. The use of secondary metabolites from plant leaf extract has recently emerged as a novel technology for the synthesis of various nanoparticles, according to recent studies. The leaf extract of Azadirachta indica was used to synthesize iron nanoparticles in this research. The effects of reactant concentrations, reaction temperature and pH of the solution on the synthesis process of iron nanoparticles were studied. The formation of iron nanoparticles in dispersion was monitored using a UV-Visible Spectrophotometer that analyzed absorbance spectra. Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) characterized the morphology of iron nanoparticles and results reveal the particles are spherical in shape with an average size of 48 nm. The following are the ideal conditions for synthesis: leaf extract 15%, [FeCl 3 ] = 1.0 mM, pH 6.0 and temperature 60◦C. The plant biomolecules induce the reduction of Fe 3+ ions to FeNPs and act as a capping and stabilizing agent, which is confirmed by the FTIR technique. Therefore, they have good stability for various applications.

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Activation of peroxodisulfate and peroxomonosulfate by green synthesized copper nanoparticles for Methyl Orange degradation: A kinetic study

Cited by 39 publications

References 43 publications

A kinetic study on the degradation and biodegradability of silver nanoparticles catalyzed Methyl Orange and textile effluents

A kinetic study on the degradation and biodegradability of silver nanoparticles catalyzed Methyl Orange and textile effluents

Single-Step Green Synthesis of Iron Nanoparticles in the Aqueous Phase for Catalytic Application in Degradation of Malachite Green

Experimental Investigation on Green Synthesis of FeNPs using Azadirachta indica leaves

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