Degradation of Congo red pollutants using microwave derived SrFe12O19: An efficient magnetic photocatalyst under visible light

Mohanta, Ojaswini; Singhbabu, Yashabanta N.; Giri, S.K.; Dadhich, D; Das, Nigamananda; Sahu, Ranjan K.

doi:10.1016/j.jallcom.2013.02.074

Cited by 76 publications

(23 citation statements)

References 32 publications

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“…According to Sreelekha et al (2016), a photocatalyst having good magnetic properties at the nanoscale enables for the possibility to have magnetic separation of the used photocatalyst particles, which happens to be a relatively very simple and efficient strategy to remove suspended solids from aqueous solutions or effluents with no need for further separation. For example, Mohanta et al (2013) evaluated the photocatalytic performance of magnetic SrFe 12 O 19 and SrFe 11.4 Al 0.6 O 19 under visible light and sunlight for the degradation of Congo red and reported that appreciably magnetization values of around ~ 52 emu/g at 300 K had been obtained, and this magnetic property of the photocatalyst was helpful for its separation from the reaction cell when a low strength magnetic field was applied after the reaction. Later, Sreelekha et al (2016) have prepared virgin and co-doped covellite copper (II) sulphide NPs (to be thereafter assessed for the sunlight photocatalytic degradation of rhodamine B) whereby the pristine CuS was found to be endowed with diamagnetic property and the co-doped NPs had increasing room-temperature ferromagnetism with higher doping precursor concentrations.…”

Section: Reusability Of Photocatalystsmentioning

confidence: 99%

Fabrication, functionalization and performance of doped photocatalysts for dye degradation and mineralization: a review

et al. 2020

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Textile wastewaters contain refractory dyes that cause pollution and socioeconomic issues, thus calling for efficient remediation techniques such as photocatalysis. We review the fabrication, functionalization, performance and limitations of doped catalysts for degrading and mineralizing dyes. We present developments in photocatalyst immobilization and photocatalytic reactor design. Methods such as microwave irradiation, sonication and use of ionic liquids are emerging for the preparation of doped photocatalysts. Whilst single-dye systems have been extensively studied, there is limited knowledge on multipledye systems. Immobilization of photocatalysts is gaining popularity for large-scale application, but faces issues of erosion, corrosion, mechanical strength and structure integrity. Ecotoxicological studies are required in real environments to validate the potential applications of nanostructured doped photocatalysts.

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Section: Reusability Of Photocatalystsmentioning

confidence: 99%

Fabrication, functionalization and performance of doped photocatalysts for dye degradation and mineralization: a review

et al. 2020

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“…(2015) [1][2][3][4][5][6][7][8][9][10][11][12] www.deswater.com doi: 10.1080/19443994.2015.1060540 pollutant dye. Exposure of pollutant dyes in aqueous media is a serious concern to the recent environmental scientists due to their possible carcinogenicity, reproductive toxicity, neurotoxicity, and other skin-and eye-related problems [3][4][5][6].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

“…Owing to their complex aromatic structure and synthetic origin, dyes are stable to light, oxidation, and biodegradable process, which provides them a long exposure time in the environment [6,7]. Hence, removal of dyes from industrial effluents has become imperative not only to protect human health but also for the protection of the natural environment [8,9].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Methyl orange adsorption onto simple chemical route synthesized crystalline α-Fe₂O₃nanoparticles: kinetic, equilibrium isotherm, and neural network modeling

Debnath

Deb

Chattopadhyay

et al. 2015

Desalination and Water Treatment

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A B S T R A C TNanoparticles of α-Fe 2 O 3 were synthesized by simple chemical precipitation method and characterized by X-ray diffraction study, scanning electron microscopy, and Fourier transform infrared spectroscopy. Feasibility of as-synthesized nanoparticles was investigated for adsorptive removal of methyl orange (MO) dye from aqueous solution. The effects of various experimental parameters such as solution pH, initial MO concentration, contact time, and α-Fe 2 O 3 nanoparticles dose were studied in batch mode. More than 90% removal was reported at pH 2.0 with 30 mg L −1 initial MO concentration treated with 1.00 g L −1 adsorbent dose. Isotherm study reveals that Langmuir isotherm model is the most efficient one in explaining the process and maximum adsorption capacity as much as 28.90 mg g −1 is reported. Kinetic study shows that the adsorption process is best explained by second-order kinetic model confirming the dominancy of chemisorption in the process. Subsequently, the experimental data were modeled by artificial neural network to predict the removal efficiency of MO by α-Fe 2 O 3 nanoparticles following conduction of 95 experimental data points. A three-layer feed-forward back-propagation model with Levenberg-Marquardt algorithm was developed which show that the optimal network topology is 4-10-1. Model predicted data shows very good agreement with experimental data set with mean squared error and coefficient of determination (R 2 ) as 0.00152 and 0.9916, respectively.

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“…A species of hard-magnetic material, strontium ferrite (SrFe 12 O 19 ) was widely used in various materials because of its excellent properties, for example relatively large saturation magnetization, superior coercivity, better chemical stability, and corrosion resistivity. 13 Fortunately it was found that SrFe 12 O 19 could be used as a magnetic substrate for a magnetic catalyst, confirmed by Ji et al, 14 Aziz et al, 15 Pullar et al, 16 and our previous investigation.…”

Section: Introductionmentioning

confidence: 99%

Magnetic composite BiOCl–SrFe₁₂O₁₉: a novel p–n type heterojunction with enhanced photocatalytic activity

et al. 2014

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The magnetic composite BiOCl-SrFe12O19, a novel p-n type heterojunction was synthesized by hydrolysis with a medium temperature sintering method. The microstructure and magnetic properties of the prepared material were characterized by FTIR, XRD, SEM, TEM, HRTEM, SAED, and VSM. The results showed the [001] facet of BiOCl with high photocatalytic activity was exposed in the BiOCl-SrFe12O19. The heterostructured BiOCl-SrFe12O19 had better magnetic properties, contributing to its reuse and improvement in photocatalysis. Moreover, the composite was blessed with excellent photocatalytic activity and stability. In the BiOCl-SrFe12O19 system, SrFe12O19 not only inhibited the growth of BiOCl along the [001] direction to enhance the exposure of the [001] wafer, but also acted as a sensitizer absorbing light irradiation. The magnetic field generated from SrFe12O19 made BiOCl, under light irradiation, produce more photo-induced electrons and holes and simultaneously hampered their recombination. For the first time we propose the possible mechanism of how to enhance photocatalytic activity by a magnetic field effect originating from the magnetic photocatalyst itself.

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Degradation of Congo red pollutants using microwave derived SrFe12O19: An efficient magnetic photocatalyst under visible light

Cited by 76 publications

References 32 publications

Fabrication, functionalization and performance of doped photocatalysts for dye degradation and mineralization: a review

Fabrication, functionalization and performance of doped photocatalysts for dye degradation and mineralization: a review

Methyl orange adsorption onto simple chemical route synthesized crystalline α-Fe₂O₃nanoparticles: kinetic, equilibrium isotherm, and neural network modeling

Magnetic composite BiOCl–SrFe₁₂O₁₉: a novel p–n type heterojunction with enhanced photocatalytic activity

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Degradation of Congo red pollutants using microwave derived SrFe12O19: An efficient magnetic photocatalyst under visible light

Cited by 76 publications

References 32 publications

Fabrication, functionalization and performance of doped photocatalysts for dye degradation and mineralization: a review

Fabrication, functionalization and performance of doped photocatalysts for dye degradation and mineralization: a review

Methyl orange adsorption onto simple chemical route synthesized crystalline α-Fe2O3nanoparticles: kinetic, equilibrium isotherm, and neural network modeling

Magnetic composite BiOCl–SrFe12O19: a novel p–n type heterojunction with enhanced photocatalytic activity

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Product

Resources

About

Methyl orange adsorption onto simple chemical route synthesized crystalline α-Fe₂O₃nanoparticles: kinetic, equilibrium isotherm, and neural network modeling

Magnetic composite BiOCl–SrFe₁₂O₁₉: a novel p–n type heterojunction with enhanced photocatalytic activity