Green synthesized rGO-AgNP hybrid nanocomposite – An effective antibacterial adsorbent for photocatalytic removal of DB-14 dye from aqueous solution

Karthik, C.; Swathi, N.; S, Pandi Prabha; Dg, Caroline

doi:10.1016/j.jece.2019.103577

Cited by 34 publications

References 35 publications

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Photocatalytic wet peroxide assisted degradation of Orange II dye by reduced graphene oxide and zeolites

Ovhal

Rodrigues

Madeira

2020

J of Chemical Tech & Biotech

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BackgroundPhotocatalytic degradation of Orange II (OII) dye has been carried out with commercially available materials, namely sodium Y zeolite (NaY), ammonium Y zeolite (NH4Y), and reduced graphene oxide (RGO). The catalysts were characterized by N2 adsorption at −196 °C, pH at the point of zero charge (pHpzc), and ultraviolet/visible (UV/Vis) diffuse reflectance absorbance. The initial screening of processes like adsorption, oxidation with hydrogen peroxide alone, direct photolysis, combination of H2O2 with the catalyst, and/or with UV/Vis radiation has been done. For the process with better performance (radiation combined with the oxidant and using the materials as photocatalysts), a parametric study was carried out to evaluate the effect of pH, H2O2 concentration, catalyst dose, radiation intensity, and radiation type (UV/Vis or visible radiation) in OII degradation and mineralization.ResultsThe screening demonstrated that radiation plays an important role in the hydroxyl radical formation and, inherently, in the oxidation of OII and in the mineralization of the organic compounds formed. Still, for all catalysts tested, the existence of optima in terms of pH (2.0), catalyst dose (100 mg L−1), and H2O2 concentration (6 mM) was found, while the maximum radiation intensity (500 W m−2) and UV/Vis radiation incidence benefits the oxidation process. However, the best process performance was achieved when using the catalyst that absorbs more radiation (RGO), yielding OII and TOC removals of 97.7% and 87.9%, respectively, after 90 min of reaction time.ConclusionTaking into account the great performance reached, a possible application of such catalysts in the treatment of textile dyeing effluents is anticipated. © 2020 Society of Chemical Industry (SCI)

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Photocatalytic wet peroxide assisted degradation of Orange II dye by reduced graphene oxide and zeolites

Ovhal

Rodrigues

Madeira

2020

J of Chemical Tech & Biotech

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Biofabricated Silver Nanoparticles and Nanocomposites as Green Catalyst to Mitigate Dye Pollution in Water‐A Review

Kalita

Jain

2021

ChemistrySelect

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Synthetic dyes are one of the major classes of pollutant released in the environment by industries such as textile, paper, leather, rubber, cosmetics, pharmaceutical etc. They are known carcinogen and extremely hazardous to human, plant and aquatic life. Conventional chemical, physical and biological methods used for treatment of industrial effluent are costly, time-consuming and produces secondary waste. Silver nanoparticle and nanocomposite-based catalyst are very effective in decomposition of dyes due to their high surface area-tovolume ratio, stability and biocompatibility. The degradation reaction takes place in presence of light (photocatalytic) or in presence of a reagent such as NaBH 4 or H 2 O 2 .Of various methods of silver nanoparticle/nanocomposite synthesis, green synthesis has been quite popular in recent times due to ease in synthesis and sustainability factor. In this review, current state of knowledge about application of green synthesized silver nanoparticles /nanocomposites in degradation of synthetic dyes and other organic pollutant have been summarized. Moreover, the article also emphasizes on the mechanism of degradation, the kinetic parameters and optimum treatment conditions.

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Green Nanomaterials for Environmental Remediation

Prediger

Neves

Camparotto

et al. 2022

Handbook of Green and Sustainable Nanotechnology

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Green synthesized rGO-AgNP hybrid nanocomposite – An effective antibacterial adsorbent for photocatalytic removal of DB-14 dye from aqueous solution

Cited by 34 publications

References 35 publications

Photocatalytic wet peroxide assisted degradation of Orange II dye by reduced graphene oxide and zeolites

Photocatalytic wet peroxide assisted degradation of Orange II dye by reduced graphene oxide and zeolites

Biofabricated Silver Nanoparticles and Nanocomposites as Green Catalyst to Mitigate Dye Pollution in Water‐A Review

Green Nanomaterials for Environmental Remediation

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