Visible light-assisted photodegradation by silver tungstate-modified magnetite nanocomposite material for enhanced mineralization of organic water contaminants

Kumar, Sanjay; Tarun, .; Saxena, J. N.; Bansal, Chirag; Kumari, Pratibha

doi:10.1007/s13204-019-01230-y

Cited by 9 publications

(10 citation statements)

References 83 publications

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“…e diffraction peaks of g-C 3 N 4 remain intact which shows that the doping of iron does not change the peaks of g-C 3 N 4 but the intensity of the peaks in the final composite is reduced, confirming effective insertion of the dopant [24]. e XRD data displayed welldefined diffraction peaks consistent with planes (301), (002), (231), (400), (402), ( 233), (460), and (462), observed at 2θ values 28.4 °, 30.58 °, 31.67 °, 32.88 °, 45.4 °, 54.9 °, 56.9, and 58.04 °, respectively, as shown in Figure 3, and are coherent with the corresponding planes of Ag 2 WO 4 (JCPDS# 34-0061) [13]. All the characteristic peaks of g-C 3 N 4 and Ag 2 WO 4 are present in the Fe-doped ternary composite but with lesser intensities than the undoped CN-AW and Fe-CN composites.…”

Section: Xrd Analysissupporting

confidence: 63%

“…Fe doping has shown enhancement in photodegradation upon improved prospect of charge carrier production upon light irradiation, eventually increasing photodegradation. e following formula was used to assess the catalyst's bandgap energies [13]: narrowed the bandgap of the ternary composite, suggesting efficient separation of charge carriers [23].…”

Section: Optical Analysismentioning

confidence: 99%

“…is ternary metal oxide has been gaining attention because of its better light-harvesting ability and photoluminescence characteristics. Silver tungstate (AW) is functionalized by coupling with other photoactive materials to increase the photoresponse and improve its stability [13].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Xrd Analysissupporting

confidence: 63%

Section: Optical Analysismentioning

confidence: 99%

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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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“…Therefore, the value of the band gap is important for the photocatalytic activity of GO/FeÀ THPP. The energy of the valence band (E VB ) and conduction band (E CB ) of nanomaterials were calculated by the equations ( 1) and ( 2): [9]…”

Section: Optical Properties Of Prepared Go/feà Thpp Nanocompositementioning

confidence: 99%

Synthesis of Graphene oxide/Porphyrin Nanocomposite for Photocatalytic Degradation of Crystal Violet Dye

et al. 2023

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A novel nanocomposite was synthesized by covalent functionalization of graphene oxide (GO) with 5,10,15,20‐tetrakis(4‐hydroxyphenyl)porphyrinatoiron (III) chloride (Fe−THPP) via an ester linkage. The synthesized nanocomposite was characterized by various techniques such as XPS, Raman spectroscopy, BET, IR, UV‐Visible, TGA, SEM, and EDX. The synthesized nanocomposite exhibited appreciable interaction with crystal violet (CV) dye with a detection limit of 2.6×10−6 μg/mL and binding constant of 35.93×103 ppm−1 which ensured the high concentration of CV dye on the surface of synthesized photocatalyst. The nanocomposite was effectively utilized in the photo‐degradation of CV dye under visible light irradiation. The photo‐degradation efficiency was remarkably high (93.45 %) with a low catalytic dosage of 0.4 mg/L within 80 minutes. The nanocomposite exhibited good stability and reusability and thereby can be used in the photocatalytic degradation processes to treat wastewater.

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“…8 The development of various nanomaterials is gaining towering height due to their unique properties and wide applications. [9][10][11][12][13][14][15][16] Recently, carbonaceous materials such as graphene, carbon nanotubes (CNTs), graphitic carbon nitride have attracted enormous attention due to their excellent physical, chemical properties, high specic surface area, etc. Furthermore, carbon nanomaterials' mechanical properties increase their suitability to integrate them into exible sensor devices.…”

Section: Introductionmentioning

confidence: 99%

Gold-carbonaceous materials based heterostructures for gas sensing applications

Kumar

Sengar

et al. 2021

RSC Adv.

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Visible light-assisted photodegradation by silver tungstate-modified magnetite nanocomposite material for enhanced mineralization of organic water contaminants

Cited by 9 publications

References 83 publications

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

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

Synthesis of Graphene oxide/Porphyrin Nanocomposite for Photocatalytic Degradation of Crystal Violet Dye

Gold-carbonaceous materials based heterostructures for gas sensing applications

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