Improved photocatalytic degradation of dye using coal fly ash-based zinc ferrite (CFA/ZnFe2O4) composite

Nadeem, Nimra; Zahid, Muhammad; Rehan, Zulfiqar Ahmad; Hanif, Muhammad Asif; Yaseen, Muhammad

doi:10.1007/s13762-021-03255-9

Cited by 41 publications

(21 citation statements)

References 53 publications

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“…Degradation of methylene blue by the photocatalytic activity of the synthesized composite photocatalyst (Mn 0.6 Zn 0.4 Fe 2 O 4 /g-C 3 N 4 ) was observed at different pH varied from 2 to 9 while other parameters were kept constant (figure 8(a)). It was observed that at pH 2-4 degradation increases this increase in degradation at acidic pH by the catalysts is due to the Fenton-like reaction mechanism in solution [37,45] but a little decrease was observed at pH 5 and 6 because the surface had no charge at the pH 5.25 according to point zero charge (figure 5). The highest degradation was recorded at pH 8.…”

Section: Effect Of Different Parameters On Methylene Blue (Mb) Degrad...mentioning

confidence: 98%

Mixed metal ferrite (Mn_0.6Zn_0.4Fe₂O₄) intercalated g-C₃N₄ nanocomposite: efficient sunlight driven photocatalyst for methylene blue degradation

et al. 2021

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Visible active mixed metal ferrite intercalated semiconductor photocatalyst Mn 0.6 Zn 0.4 Fe 2 O 4 /g-C 3 N 4 was prepared via facile hydrothermal and liquid assembly method for methylene blue (MB) dye degradation. The prepared samples were well characterized in term of their functional groups, crystallinity, elemental analysis, surface morphology using Fourier transform infrared spectroscopy, x-ray diffraction spectroscopy, energy dispersive x-ray, and scanning electron microscopy, respectively. The optical response of catalysts was checked by estimating the energy band gap (E g ) of semiconductor photocatalysts using UV-vis spectroscopy. The photoluminescence spectroscopy was also performed to estimate the reduction in emission intensity after insertion of g-C 3 N 4 into Mn 0.6 Zn 0.4 Fe 2 O 4. The novel composition of Mn 0.6 Zn 0.4 Fe 2 O 4 with g-C 3 N 4, improved the optical response of pristine photocatalysts due to the reduction in the energy band gap and insertion of heterojunction. The surface area analysis of Mn 0.6 Zn 0.4 Fe 2 O 4 and Mn 0.6 Zn 0.4 Fe 2 O 4 /g-C 3 N 4 were acquired by Brunauer-Emmett-Teller. Point zero charge was also determined to observe the surface behavior of composite under different solution pH. Various parameters such as pH, catalyst dose, oxidant dose, irradiation time and initial dye concentration were optimized, and their effects were studied in photo-Fenton process. It was observed that 98% MB dye was degraded under optimized conditions (pH=8, composite dose=50 mg/100 ml, oxidant dose=7 mM, initial dye conc.=10 ppm, and irradiation time=120 min). The results showed that when the ferrites of mixed metals (Mn, Zn) were used with g-C 3 N 4 their photocatalytic activity enhanced due to mutual effect of both mixed metals ferrite and g-C 3 N 4 , which is considerably higher than their individual effect already reported. Furthermore, the combined effect of independent variables was evaluated by response surface methodology.

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Section: Effect Of Different Parameters On Methylene Blue (Mb) Degrad...mentioning

confidence: 98%

Mixed metal ferrite (Mn_0.6Zn_0.4Fe₂O₄) intercalated g-C₃N₄ nanocomposite: efficient sunlight driven photocatalyst for methylene blue degradation

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“…Lahore, Pakistan. The chemical composition of the CFA sample used in this was previously reported [31] and is also given supplementary information (Table S1 (available online at stacks. iop.org/NANO/32/345705/mmedia)).…”

Section: Chemicals/reagentsmentioning

confidence: 99%

Synthesis and photocatalytic degradation of rhodamine B using ternary zeolite/WO₃/Fe₃O₄ composite

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Demand for freshwater increases day by day as impurity increases due to the industrial, domestic and municipal waste in the water. Inappropriate disposal of coal fly ash (CFA) is not eco-friendly, therefore the need is to convert it into some beneficial material like zeolite. Zeolite-based composites with metal oxides show high cation interchange capacity, fast adsorption, and high efficiency for the removal of wastewater pollutants. In this research work, metal oxide along with zeolite (derived for CFA) was prepared. Metal oxide (WO3) and magnetite (Fe3O4) based zeolite composite was used adsorption enhanced photocatalytic degradation of rhodamine B dye. Ternary composite (zeolite/WO3/Fe3O4) was characterized using a scanning electron microscope, x-ray diffraction, Fourier transform infrared spectroscopy. The bandgap energy of composite was estimated using Tauc plot method from the data obtained after UV–visible spectroscopy. The behavior of composite under acidic and basic conditions was analyzed using pHpzc of the composite. Influencing parameters like pH, dye concentration, contact time, and catalyst dosage was optimized under ultraviolet irradiations (254 nm). The results show that maximum degradation was achieved with zeolite/WO3/Fe3O4 composite under optimized conditions of pH = 7, catalyst dosage = 10 mg/100 ml, RhB concentration 10 ppm, and time 60 min. The first-order kinetic model was best fitted to the experimental data. RSM was used as a statistical tool to analyze the data.

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“…e catalyst Fe-CN-AW showed a degradation of 80% up to 14 ppm, after which it started declining. Owing to an increase in the number of dye molecules, more molecules get attached to the photocatalyst surface, resulting in lesser photons reaching the nanocomposite surface [35]. is eventually results in a decline in hydroxyl ion generation and, subsequently, the decolorization process.…”

Section: Effect Of Initial Dye Concentrationmentioning

confidence: 99%

Investigation of Fe-Doped Graphitic Carbon Nitride-Silver Tungstate as a Ternary Visible Light Active Photocatalyst

Alosaimi

Azeem

Tahir

et al. 2021

Journal of Chemistry

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The rapid population growth and economic development have largely contributed to environmental pollution. Various advanced oxidation processes have been used as the most viable solution for the reduction of recalcitrant pollutants and wastewater treatment. Heterogeneous photocatalysis is one of the broadly used technologies for wastewater treatment among all advanced oxidation processes. Graphitic carbon nitride alone or in combination with various other semiconductor metal oxide materials acts as a competent visible light active photocatalyst for the removal of recalcitrant organic pollutants from wastewater. Rational designing of an environment-friendly photocatalyst through a facile synthetic approach encounters various challenges in photocatalytic technologies dealing with semiconductor metal oxides. Doping in g-C3N4 and subsequent coupling with metal oxides have shown remarkable enhancement in the photodegradation activity of g-C3N4-based nanocomposites owing to the modulation in g-C3N4 bandgap structuring and surface area. In the current study, a novel ternary Fe-doped g-C3N4/Ag2WO4 visible light active photocatalyst was fabricated through an ultrasonic-assisted facile hydrothermal method. Characterization analysis included SEM analysis, FTIR, XRD, XPS, and UV-Visible techniques to elucidate the morphology and chemical structuring of the as-prepared heterostructure. The bandgap energies were assessed using the Tauc plot. The ternary nanocomposite (Fe-CN-AW) showed increased photodegradation efficiency (97%) within 120 minutes, at optimal conditions of pH = 8, catalyst dose = 50 mg/100 ml, an initial RhB concentration of 10 ppm, and oxidant dose 5 mM under sunlight irradiation. The enhanced photodegradation of rhodamine B dye by ternary Fe-CN-AW was credited to multielectron transfer pathways due to insertion of a Fe dopant in graphitic carbon nitride and subsequent coupling with silver tungstate. The data were statistically assessed by the response surface methodology.

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Improved photocatalytic degradation of dye using coal fly ash-based zinc ferrite (CFA/ZnFe2O4) composite

Cited by 41 publications

References 53 publications

Mixed metal ferrite (Mn_0.6Zn_0.4Fe₂O₄) intercalated g-C₃N₄ nanocomposite: efficient sunlight driven photocatalyst for methylene blue degradation

Mixed metal ferrite (Mn_0.6Zn_0.4Fe₂O₄) intercalated g-C₃N₄ nanocomposite: efficient sunlight driven photocatalyst for methylene blue degradation

Synthesis and photocatalytic degradation of rhodamine B using ternary zeolite/WO₃/Fe₃O₄ composite

Investigation of Fe-Doped Graphitic Carbon Nitride-Silver Tungstate as a Ternary Visible Light Active Photocatalyst

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Improved photocatalytic degradation of dye using coal fly ash-based zinc ferrite (CFA/ZnFe2O4) composite

Cited by 41 publications

References 53 publications

Mixed metal ferrite (Mn0.6Zn0.4Fe2O4) intercalated g-C3N4 nanocomposite: efficient sunlight driven photocatalyst for methylene blue degradation

Mixed metal ferrite (Mn0.6Zn0.4Fe2O4) intercalated g-C3N4 nanocomposite: efficient sunlight driven photocatalyst for methylene blue degradation

Synthesis and photocatalytic degradation of rhodamine B using ternary zeolite/WO3/Fe3O4 composite

Investigation of Fe-Doped Graphitic Carbon Nitride-Silver Tungstate as a Ternary Visible Light Active Photocatalyst

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Mixed metal ferrite (Mn_0.6Zn_0.4Fe₂O₄) intercalated g-C₃N₄ nanocomposite: efficient sunlight driven photocatalyst for methylene blue degradation

Mixed metal ferrite (Mn_0.6Zn_0.4Fe₂O₄) intercalated g-C₃N₄ nanocomposite: efficient sunlight driven photocatalyst for methylene blue degradation

Synthesis and photocatalytic degradation of rhodamine B using ternary zeolite/WO₃/Fe₃O₄ composite