Structural, Optical, Thermal and Photocatalytic Dye Degradation Properties of BiFeO3–WO3 Nanocomposites

Subramanian, Yathavan; Ramasamy, Venkatapathy; Gubendiran, Ramesh Kumar; Сринивасан, Г.; Arulmozhi, Durairajan

doi:10.1007/s11664-018-6654-2

Cited by 19 publications

(5 citation statements)

References 60 publications

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“…In particular, Heterogeneous photocatalyst with wide band gap and high electric conductance semiconductor could provide a larger surface area and has shown improved dye degradation performance [28]. BiFeO 3 based heterogeneous photocatalyst including BiFeO 3 /g-C 3 N 4 , BiFeO 3 /CuO, BiFeO 3 /WO 3, BiFeO 3 /Pt [29, 30, 31, 32, 33] substantiates the significances of photocatalytic activity of BiFeO 3 based compounds. For example, BiFeO 3 /ZnFe 2 O 4 nanostructures exhibit excellent photocatalytic activity for degradation of methylene blue which has been ascribed for the improved visible-light absorption, charge carrier separation and migration [36].…”

Section: Introductionmentioning

confidence: 74%

Investigations on the enhanced dye degradation activity of heterogeneous BiFeO3–GdFeO3 nanocomposite photocatalyst

Subramanian

Ramasamy

Karthikeyan

et al. 2019

Heliyon

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Perovskite types of nanocomposites of BiFeO 3 –GdFeO 3 (BFO-GFO) has been synthesized using sol-gel route for the first time. The nanocomposite powders were characterized by powder X-Ray diffraction (PXRD) to confirm the existence of mixed crystallographic phases. EDX analysis on nanocomposites estimates the composition of individual element present in BFO-GFO matrix. The induced strain upon loading GdFeO 3 (GFO) in BiFeO 3 (BFO) matrix has been computed with the aid of Williamson –Hall (W–H) plot. Surface morphologies of nanocomposite powders has been studied using Field Emission Scanning Electron Microscope ( FESEM) images. The observed changes in the band gap energies of nanocomposite powders due to the inclusion of GFO has been ascertained from the tauc plots. PL emission of BFO upon loading GFO found to have detected in the IR region due to defect level transition. Finally, the methylene blue dye (MB) degradation characteristics of BFO, GFO and the nanocomposite powders of BFO-GFO have also been studied. The overall results obtained has been discussed in detail.

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Section: Introductionmentioning

confidence: 74%

Investigations on the enhanced dye degradation activity of heterogeneous BiFeO3–GdFeO3 nanocomposite photocatalyst

Subramanian

Ramasamy

Karthikeyan

et al. 2019

Heliyon

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“…6d, the extracted value of kapp sample annealed at 400 and 500˚C are 0.0027 min-1 and 0.0009 min −1 , respectively. The photocatalytic activity of sample annealed at 400˚C is very promising in comparison with the recently reported studies on WO 3 -based photocatalyst [40][41][42][43][44]. Table 2 present the MB degradation efficiencies of WO 3 -based photocatalyst.…”

Section: Iii3 Optical Propertiesmentioning

confidence: 75%

“…All these works were carried out during the same time (180 min) with similar MB concentration. It is clear that the MB degradation efficiencies of WO 3 nanoplate -sample annealed at 400˚C -are comparable with the BiFeO 3 -WO 3 nanoparticles composite [40], WO 3 nanoparticles [41], WO 3 /g-C 3 N 4 nanocorals (3:1) composite [42], 10%Gr/WO 3 nanosticks composite [43], 2%Eu-doped WO 3 nanorods [44] which all required complicated preparation process. Moreover, the WO 3 nanoplate catalyst requires a lower concentration -0.20 g/l -than in other works.…”

Section: Iii3 Optical Propertiesmentioning

confidence: 87%

“…Moreover, the WO 3 nanoplate catalyst requires a lower concentration -0.20 g/l -than in other works. In detail, Subramanian et al [40], Huang et al [41], and Tahir et al [44] used catalyst concentration of 1.00 g/l -five times larger, Singh et al [42] used catalyst concentration of 0.50 g/l -two times larger. Gan et al [43] used similar catalyst concentrations -0.25 g/l -but the degradation efficiency is lower than the results obtained with the WO 3 nanoplate.…”

Section: Iii3 Optical Propertiesmentioning

confidence: 99%

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Tungsten Oxide Nanoplates: Facile Synthesis, Controllable Oxygen Deficiency and Photocatalytic Activity

Nguyen

Pham

et al. 2020

Comm. in Phys.

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Monoclinic tungsten oxide (WO3) nanoplates were synthesized via a two-step simple process: acid precipitation at room temperature to prepare WO3.H2O nanoplates and annealing at high temperature (400 and 500 oC) in ambient air to obtain WO3 nanoplates. The effect of annealing temperature on physical properties (morphology, oxygen deficiency, crystallinity, optical properties, and photocatalytic activity) of WO3 nanoplates was studied. At both two studied annealing temperatures, all samples have the stable monoclinic structure and visible light-range optical bandgap, but the morphology and photocatalytic activity of the samples vary significantly with annealing temperature. At higher annealing temperature (500 oC), the sample has both nanoplate and nanograin morphologies with round edges, higher crystallinity, larger optical bandgap (2.71 eV), and lower photocatalytic activity. The sample annealed at 400 oC has nanoplate morphology with sharp edges, lower optical bandgap (2.63 eV), and higher photocatalytic which shows a high potential for photocatalytic application under visible light irradiation. The effect of the annealing temperature on the properties of WO3 nanoplates is assigned to the dehydration, the coalescence, and/or the melting processes at high temperatures. Dehydration causes the formation of oxygen vacancy – oxygen deficiency. The coalescence and/or the melting result in the changing of morphology and the decrease of the oxygen vacancies. These results imply a simple, cost-effective method to prepare highly oxygen-deficient WO3 nanoplates.

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“…This process resulted in complete mineralization of noxious pollutants into CO 2 and H 2 O at ambient conditions [22,26]. Various semiconductors along with other metal oxides have been evaluated as catalyst for AOP i.e., zinc oxide (ZnO), zinc sulfide (ZnS), iron(III) oxide (Fe 2 O 3 ), cobalt iron oxide, BiFeO based nanocomposites, scadmium sulfide (CdS) titanium and dioxide (TiO 2 ) [24][25][26][35][36][37][38][39][40][41][42]. Semiconductor nanoparticles are considered suitable for wastewater treatment due to their non-toxic behavior, chemically and biologically inert and inexpensive [43][44][45].…”

Section: Introductionmentioning

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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Structural, Optical, Thermal and Photocatalytic Dye Degradation Properties of BiFeO3–WO3 Nanocomposites

Cited by 19 publications

References 60 publications

Investigations on the enhanced dye degradation activity of heterogeneous BiFeO3–GdFeO3 nanocomposite photocatalyst

Investigations on the enhanced dye degradation activity of heterogeneous BiFeO3–GdFeO3 nanocomposite photocatalyst

Tungsten Oxide Nanoplates: Facile Synthesis, Controllable Oxygen Deficiency and Photocatalytic Activity

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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