Facile synthesis of zero valent iron and photocatalytic application for the degradation of dyes

Bhatti, Haq Nawaz; Iram, Zunaira; Iqbal, Munawar; Nisar, Jan; Khan, Mohammad Ibrahim

doi:10.1088/2053-1591/ab66a0

Cited by 40 publications

(12 citation statements)

References 80 publications

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“…In fact, the Fenton process initiates with the generation of hydroxyl radicals. As a result, Fe O 2] ratio [22,23]. It was indicated the maximum degradation for pigment solution was 93.2% (Fig.…”

Section: Resultsmentioning

confidence: 95%

Degradation of a Pigment Red 238 using UV, UV/H2O2, UV/H2O2/SnO2 and Fenton Processes

Bokhari¹,

Mustafa²,

Ahmed³

et al. 2021

Pol. J. Environ. Stud.

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This study implicates the degradation of pigment red 238 (PR238) from aqueous solution employing photocatalytic processes. The procedure was carried out under UV radiation, SnO 2 and H 2 O 2 as well as Fenton process. The influence of process variables viz., pigment concentration (50-150 ppm), amount of catalyst (0.1-0.3 g/L), H 2 O 2 concentration (0.3-0.9 mL), UV irradiation time (30-60 min) and pH (3-9) were studied for the removal of PR238. The experiments were conducted by exposing aqueous solutions of PR238 having photocatalyst with UV light and effect of process variables such as pH, concentration of pigment, concentration of H 2 O 2 and amount of catalyst was investigated. The degradation of >90% was achieved with Fenton process, whereas H 2 O 2 /UV and UV/H 2 O 2 /SnO 2 furnished up to 78% and 89.6% PR238 removal, respectively. From results, it was concluded that the Fenton process is highly efficient for the removal of PR238, which can be employed for the removal of dyes form effluents .

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Section: Resultsmentioning

confidence: 95%

Degradation of a Pigment Red 238 using UV, UV/H2O2, UV/H2O2/SnO2 and Fenton Processes

Bokhari¹,

Mustafa²,

Ahmed³

et al. 2021

Pol. J. Environ. Stud.

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“…15 , the detailed mechanism of AG-25 degradation is shown for the first time, up to the best knowledge of the authors. The degradation mechanism of AG-25 presented in literature is based on the formation of OH radicals by Fenton reaction that induces Ag-25 mineralization, without analysis of the degradation routes and secondary products 60 , 61 . Degradation paths of similar molecules, such as Acid Green 1 62 or Malachite Green 63 , were proposed.…”

Section: Resultsmentioning

confidence: 99%

Toward enhanced catalytic activity of magnetic nanoparticles integrated into 3D reduced graphene oxide for heterogeneous Fenton organic dye degradation

Sadegh

Politakos

Román

et al. 2021

Sci Rep

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Composite Fenton nanocatalyst was prepared by water-based in situ creation of Fe3O4 nanoparticles integrated within the self-assembly 3D reduced graphene oxide (rGO) aerogel. The hybrid applied for the degradation of Acid Green 25 (AG-25) organic dye in an aqueous solution, in the presence of H2O2. By investigating the conditions that maximize the dye adsorption by the 3D composite, it was found that the pH of the solution should be adjusted between the pKa of the functional groups present on the rGO surface (carboxylic acid) and that of the dye (sulfonic acid) to promote electrostatic interactions dye—3D structure. Performed under these conditions, Fenton degradation of AG-25 in presence of H2O2 was completed in less than 30 min, including all the intermediate products, as demonstrated by MALDI–TOF–MS analysis of the aqueous solution after discoloration. Moreover, this was achieved in a solution with as high a dye concentration of 0.5 mg/mL, with only 10 mg of 3D composite catalyst, at room temperature and without additional energy input. The high performance was attributed to the creation of charge-transfer complex between rGO and Fe3O4 nanoparticles throughout covalent bond C–O–Fe, the formation of which was promoted by the in situ synthesis procedure. For the first time, up to the authors’ knowledge, AG-25 degradation mechanism was proposed.

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“…The reductions in COD, TOC and BOD values after treatment of textile real wastewater revealed that immobilized ZnO over PUF is efficient to treat the wastewater containing textile dyes, which are otherwise difficult to treat. Under the current scenario of environmental pollution [6,[14][15][16][57][58][59][60][61][62], there is need to develop and utilize efficient materials that are active under solar light and ZnO/PUF proved to be highly efficient since the activity was considerable under solar light that could possibly be used for the degradation of dyes in textile wastewater [63][64][65][66][67].…”

Section: Photocalytic Degradation Of Dyementioning

confidence: 99%

Synthesis of immobilized ZnO over polyurethane and photocatalytic activity evaluation for the degradation of azo dye under UV and solar light irardiation

Inderyas

Bhatti

Ashar

et al. 2020

Mater. Res. Express

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Zinc oxide (ZnO) nanoparticles were immobilized on polyurethane foam (PUF) and employed for the degradation of Acid black 1 dye (AB1). The ZnO/PUF was characterized by x-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive x-ray (EDX) techniques. Process variables i.e., dye concentration, pH, concentration of H 2 O 2 , irradiation time were optimized for maximum degradation of dye. ZnO/PUF showed promising efficiency for the degradation of AB1 dye and up to 86% and 65% dye degradation was achieved under UV and solar light irradiation at neutral pH, 4% H 2 O 2 , 240 min/sunlight and 75 min/UV irradiation time using 40 mg l −1 dye initial concentration. The optimum conditions were applied for the treatment of textile wastewater and biological oxygen demand (BOD) and total organic carbon (TOC) were reduced up to 70% and 80%, respectively. In view of promising photocatalytic activity (PCA), ZnO/PUF could possibly be used for the treatment of wastewater contains dyes.

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Facile synthesis of zero valent iron and photocatalytic application for the degradation of dyes

Cited by 40 publications

References 80 publications

Degradation of a Pigment Red 238 using UV, UV/H<sub>2</sub>O<sub>2</sub>, UV/H<sub>2</sub>O<sub>2</sub>/SnO<sub>2</sub> and Fenton Processes

Degradation of a Pigment Red 238 using UV, UV/H<sub>2</sub>O<sub>2</sub>, UV/H<sub>2</sub>O<sub>2</sub>/SnO<sub>2</sub> and Fenton Processes

Toward enhanced catalytic activity of magnetic nanoparticles integrated into 3D reduced graphene oxide for heterogeneous Fenton organic dye degradation

Synthesis of immobilized ZnO over polyurethane and photocatalytic activity evaluation for the degradation of azo dye under UV and solar light irardiation

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