Rapid and efficient visible light photocatalytic dye degradation using AFe2O4 (A = Ba, Ca and Sr) complex oxides

Vijayaraghavan, T.; Suriyaraj, S. P.; Selvakumar, R.; Venkateswaran, R.; Ashok, Anuradha

doi:10.1016/j.mseb.2016.04.005

Cited by 63 publications

(18 citation statements)

References 36 publications

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“…Figure 4c shows the XPS spectrum of Fe ion. The peaks of Fe ion spectrum that locate at 725.9 and 712.4 eV are ascribed to Fe 2p 1/2 and Fe 2p 3/2 , meaning that Fe exists as Fe 3+ (Vijayaraghavan et al, 2016). The results from Fig.…”

Section: Characterization Resultsmentioning

confidence: 82%

Retracted: The Fabrication of Magnetically Recyclable La-Doped TiO₂/Calcium Ferrite/Diatomite Composite for Visible-Light-Driven Degradation of Antibiotic and Disinfection of Bacteria

Zhang

2020

Environmental Engineering Science

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Powdery photocatalyst has been deeply studied due to its great potential in water treatment, yet its low recyclability is the bottleneck hindering its practical application. In this work, magnetically recyclable lanthanum-doped TiO 2 /calcium ferrite/diatomite (La-TCD) ternary composite was synthesized by sol-gel method. The physicochemical properties of this material were characterized and studied, and the photocatalytic property was evaluated by the decomposition of antibiotic oxytetracycline (OTC) and disinfection of bacteria Escherichia coli under visible light irradiation. The formation of heterojunction between La-doped TiO 2 and calcium ferrite hindered the recombination of photo-induced charge carriers and improved the photocatalytic activity. Besides, the photodecomposition of OTC was enhanced by the high adsorption ability of substrate diatomite, in other words, the adsorption and decomposition synergistic behavior between catalyst and diatomite. The optimal La doping amount, as well as composite dosage, was determined. The composite could simply be recovered from waterbody by an external magnet, and the repetition tests indicated no obvious decrease of photoactivity after five cycles. Above all, this composite presented good potential to be applied in wastewater remediation process.

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Section: Characterization Resultsmentioning

confidence: 82%

Retracted: The Fabrication of Magnetically Recyclable La-Doped TiO₂/Calcium Ferrite/Diatomite Composite for Visible-Light-Driven Degradation of Antibiotic and Disinfection of Bacteria

Zhang

2020

Environmental Engineering Science

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“…After every 30 minutes of photocatalytic experiment, 1 mL quantity of test samples were collected from each vial and their absorbance values were measured using a UV‐visible spectrophotometer. The percentage degradation of dye concentration in the solution was calculated using Equation () 51–53

Degradation (%) = ()(, 1 ‐ \frac{A}{A_{o}}) \times 100 = ()(, 1 ‐ \frac{C}{C_{o}}) \times 100

where A o and A represent absorbance of RB dye solution at time t = 0 and t = t min.…”

Section: Methodsmentioning

confidence: 99%

“…The percentage degradation of dye concentration in the solution was calculated using Equation (1). [51][52][53] where A o and A represent absorbance of RB dye solution at time t = 0 and t = t min. Similarly, C o and C represent the concentration of RB dye solution at time t = 0 and t = t min.…”

Section: Photocatalytic Experimentsmentioning

confidence: 99%

Surface plasmon resonance triggered promising visible light photocatalysis of LiNbO₃ ceramic supported Ag nanoparticles

et al. 2020

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Water pollution caused by textile industries poses a serious risk to aquatic and human life. 1,2 These industries discharge their waste-water-containing organic dyes into nearby natural sources of water (river, lake, etc.). 3 Many of these organic dyes are of carcinogenic nature. 1 Moreover, these organic dyes disturb aquatic life by causing eutrophication. 3 Nowadays, the photocatalysis process has emerged as an effective solution to remove harmful organic dyes pollutants from the water sources. 4-6 Many semiconductors with wider band gap values such as ZnO, 7 SrTiO 3 , 8 TiO 2 9 etc.

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“…3. The experimental peaks in the XRD analysis observed here were compared with the previously reported literature, which revealed the formulation of single-phase spinel CoFe 2 O 4 nanoparticles [36]. The average crystalline size of the nanoparticles was calculated by using the Scherer equation, as follows;…”

Section: Crystallite Size Determination By X-ray Diffraction Analysismentioning

confidence: 71%

“…The 1414 cm −1 peak displays the CH of carboxylate group (i.e., the bending vibration) [31], while the peak at 1027 cm −1 [33] indicates the CO bond of PEG (i.e., the stretching vibration). The CH (i.e., the bending vibration) was reflected at 859 cm −1 , while the peaks at 547 and 448 cm −1 are due to the CO and FeO bond (i.e., the bending vibration for both cases), respectively [29,30].…”

Section: Envisaging Surface Functionalization Of Nanospheres By Ft-ir Analysismentioning

confidence: 99%

Characterization and Deployment of Surface-Engineered Cobalt Ferrite Nanospheres as Photocatalyst for Highly Efficient Remediation of Alizarin Red S Dye from Aqueous Solution

Ali

Said

et al. 2020

J Inorg Organomet Polym

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Hazardous effluents in the wastewaters deteriorate the ecosystem and its effective treatment is of interest to the scientific community. In this context, herein, the cobalt ferrite (CoFe 2 O 4 ) nanospheres were fabricated and inspected for photocatalytic-driven degradation of a hazardous Alizarin Red S (ARS) dye, as a model pollutant. For effective preparation of CoFe 2 O 4 nanospheres, triethylene glycol (PEG) was used as a stabilizing agent, during the reaction of cobalt oxide and iron sulfate, followed by thermally annealed and etched with 1 M hydrochloric acid. The surface of annealed nanospheres was functionalized by using 3-(triethoxysilyl)propylamine (APTES). The as-prepared pristine, annealed, and surface functionalized CoFe 2 O 4 nanospheres were characterized by analytical techniques, such as Fourier transform infrared (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). From the XRD profile, the particle size of annealed and functionalized nanospheres were 17.3 and 21 nm, respectively. FTIR study corroborates the surface tailoring of CoFe 2 O 4 nanospheres. The SEM analysis of F-CoFe 2 O 4 nanospheres showed that the bigger aggregates of nanospheres disappear, and the overall distribution of particles was notably improved after functionalization. The surface engineered nanospheres presented high efficiency for ARS dye degradation under the optimal conditions of irradiation time, pH, adsorbent dose, dye dose, and different acids. Kinetics models explained that the degradation reaction following pseudo-first-order kinetics. The turnover number (TON) reached up to 2.75 × 10 8 , 2.85 × 10 8 and 3.01 × 10 8 for bare, annealed and functionalized CoFe 2 O 2 nanoparticles, respectively. In conclusion, the results indicate a high potential of photo-driven catalytic remediation of tested hazardous dye by engineered cobalt ferrite nanospheres and encourage further work on photocatalytic abatement of organic contaminants.

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Rapid and efficient visible light photocatalytic dye degradation using AFe2O4 (A = Ba, Ca and Sr) complex oxides

Cited by 63 publications

References 36 publications

Retracted: The Fabrication of Magnetically Recyclable La-Doped TiO₂/Calcium Ferrite/Diatomite Composite for Visible-Light-Driven Degradation of Antibiotic and Disinfection of Bacteria

Retracted: The Fabrication of Magnetically Recyclable La-Doped TiO₂/Calcium Ferrite/Diatomite Composite for Visible-Light-Driven Degradation of Antibiotic and Disinfection of Bacteria

Surface plasmon resonance triggered promising visible light photocatalysis of LiNbO₃ ceramic supported Ag nanoparticles

Characterization and Deployment of Surface-Engineered Cobalt Ferrite Nanospheres as Photocatalyst for Highly Efficient Remediation of Alizarin Red S Dye from Aqueous Solution

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Rapid and efficient visible light photocatalytic dye degradation using AFe2O4 (A = Ba, Ca and Sr) complex oxides

Cited by 63 publications

References 36 publications

Retracted: The Fabrication of Magnetically Recyclable La-Doped TiO2/Calcium Ferrite/Diatomite Composite for Visible-Light-Driven Degradation of Antibiotic and Disinfection of Bacteria

Retracted: The Fabrication of Magnetically Recyclable La-Doped TiO2/Calcium Ferrite/Diatomite Composite for Visible-Light-Driven Degradation of Antibiotic and Disinfection of Bacteria

Surface plasmon resonance triggered promising visible light photocatalysis of LiNbO3 ceramic supported Ag nanoparticles

Characterization and Deployment of Surface-Engineered Cobalt Ferrite Nanospheres as Photocatalyst for Highly Efficient Remediation of Alizarin Red S Dye from Aqueous Solution

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Product

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About

Retracted: The Fabrication of Magnetically Recyclable La-Doped TiO₂/Calcium Ferrite/Diatomite Composite for Visible-Light-Driven Degradation of Antibiotic and Disinfection of Bacteria

Retracted: The Fabrication of Magnetically Recyclable La-Doped TiO₂/Calcium Ferrite/Diatomite Composite for Visible-Light-Driven Degradation of Antibiotic and Disinfection of Bacteria

Surface plasmon resonance triggered promising visible light photocatalysis of LiNbO₃ ceramic supported Ag nanoparticles