Photodegradation of indigo carmine and methylene blue dyes in aqueous solution by SiC–TiO2 catalysts prepared by sol–gel

Gómez-Solís, C.; Juárez-Ramírez, Isaías; Moctezuma, Edgar; Torres-Martı́nez, Leticia M.

doi:10.1016/j.jhazmat.2012.03.019

Cited by 54 publications

(30 citation statements)

References 17 publications

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“…Similarly, the photogenerated charge separation was confirmed as the main factor leading to the enhanced photocatalytic activity in the photodegradation of Rhodamine B (100 ppm solution), indigo carmine (20 ppm solution) and methylene blue (20 ppm solution) . These findings are also in line with the different nanocomposite β ‐SiC—Ag 3 PO 4 /Ag/SiC.…”

Section: Introductionsupporting

confidence: 71%

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The Properties and Activity of TiO₂/beta‐SiC Nanocomposites in Organic Dyes Photodegradation

Pstrowska

Szyja

Czapor-Irzabek

et al. 2017

Photochem & Photobiology

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The TiO /beta-SiC nanocomposites containing 0-25 wt. % of beta-SiC were synthesized by the sol-gel method and tested in the photodegradation of methylene blue and methyl orange water solutions. With the increase in SiC content, only a slight decrease in energy band gap was observed (3.19-3.12 eV), together with significant increase in the surface area of the catalysts (42.7-80.4 m g ). In the synthesized material, the anatase phase of TiO was present in the form of small agglomerates resulting from the mechanical mixing process. In the process conditions (catalyst concentration 0.5 g L , initial dye concentration 100 ppm, light source 100 W UV-Vis lamp), we have observed no signs of catalyst deactivation. The significantly higher photodegradation activity of methylene blue than methyl orange can be attributed to the preferable pH of the solution compared to pH and the cationic character of the first dye. In case of methyl orange, pH process conditions substantially limit the contact of the catalyst with the dye, as negatively charged surface of the catalysts repels the dissociated anionic dye molecules.

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Section: Introductionsupporting

confidence: 71%

“… and Gómez‐Solis et al . . The method involved the hydrolysis of titanium (IV) isopropoxide (TIP—C 12 H 28 O 4 Ti—97%, Aldrich) in the presence of β ‐SiC (200‐450 mesh, Aldrich) in concentration varying from 5 to 25 wt.%.…”

Section: Methodsmentioning

confidence: 99%

The Properties and Activity of TiO₂/beta‐SiC Nanocomposites in Organic Dyes Photodegradation

Pstrowska

Szyja

Czapor-Irzabek

et al. 2017

Photochem & Photobiology

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“…Therefore, their removal from industrial effluents has become a major concern. Several methods, including flocculation, coagulation (Verma et al 2012), ion exchange (Greluk and Hubicki 2013), membrane separation (Salima et al 2012;He et al 2008), photodegradation (Kusic et al 2013;Gomez-Solis et al 2012), extraction (Muthuraman et al 2009), chemical oxidation (Turgay et al 2011), biological treatment Turgay et al 2011;Kanagaraj et al 2015), and adsorption (Elemen et al 2012;Chen 2011;Sadhukhan et al 2014;Ozdemir et al 2014) were investigated for dye removal from wastewater.…”

Section: Introductionmentioning

confidence: 99%

Effective removal of methylene blue from aqueous solution using a new magnetic iron oxide nanosorbent prepared by combustion synthesis

Păcurariu

Paska

Ianoş

et al. 2015

Clean Techn Environ Policy

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A magnetic iron oxide nanopowder (MnP) prepared by a new combustion technique was characterized and tested as adsorbent for methylene blue (MB) removal from aqueous solution. The effects of pH, adsorbent dose, initial dye concentration, contact time, and temperature on the amount of MB adsorbed were studied. The adsorption kinetics were described by a pseudo-second-order model, and the equilibrium experimental data were well fitted to the Langmuir isotherm, yielding a maximum adsorption capacity of 25.54 mg g -1 . The adsorption mechanism is governed by electrostatic forces and is highly dependent on the pH. The MnP adsorbent demonstrated excellent stability, showing good removal efficiency even after eight cycles of reuse, suggesting its potential large-scale application for the removal and recovery of MB from wastewater.

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“…The basic decomposition process can be described as: [5][6][7] Organic pollutant þ O 2 ! 8 Generally, semiconducting metal oxide such as: TiO 2 , WO 3 , MnO 2 , CeO 2 and ZnO, are used in photocatalytic degradation process. During the photocatalytic process, electronhole pairs are generated in valence and conduction bands of a semiconductor due to presence of free radical, attack the molecules of pollutants.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis and enhanced photocatalytic activity of ternary Fe₂O₃/ZnFe₂O₄/ZnO nanocomposite through cascade electron transfer

2015

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ZnO. The above mentioned nanomaterials were synthesized by hydrothermal method by varying the molar ratio of iron and zinc salts followed by calcination at 500 C. The crystalline phase, surface morphology and size of the prepared nanomaterials were characterized by XRD, FESEM & TEM analysis. FESEM and TEM images indicate the formation of irregular shape for a-Fe 2 O 3 and cubical shape for nanocomposite systems having diameter in the range of 80-100 nm. The prepared nanomaterials were used for photocatalytic degradation of malachite green in aqueous media under solar light irradiation. The nanocomposites exhibit enhanced photocatalytic activity as compared to a-Fe 2 O 3 nanoparticles. However, Fe 2 O 3 /ZnFe 2 O 4 /ZnO (Fe : Zn ¼ 70 : 30) nanocomposite exhibits highest photocatalytic activity. This result might be due cascade electron transfer mechanism in the ternary phase. Scheme 1 Schematic representation of the synthesis of Fe 2 O 3 / ZnFe 2 O 4 /ZnO nanocomposite.This journal is

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Photodegradation of indigo carmine and methylene blue dyes in aqueous solution by SiC–TiO2 catalysts prepared by sol–gel

Cited by 54 publications

References 17 publications

The Properties and Activity of TiO₂/beta‐SiC Nanocomposites in Organic Dyes Photodegradation

The Properties and Activity of TiO₂/beta‐SiC Nanocomposites in Organic Dyes Photodegradation

Effective removal of methylene blue from aqueous solution using a new magnetic iron oxide nanosorbent prepared by combustion synthesis

Hydrothermal synthesis and enhanced photocatalytic activity of ternary Fe₂O₃/ZnFe₂O₄/ZnO nanocomposite through cascade electron transfer

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Photodegradation of indigo carmine and methylene blue dyes in aqueous solution by SiC–TiO2 catalysts prepared by sol–gel

Cited by 54 publications

References 17 publications

The Properties and Activity of TiO2/beta‐SiC Nanocomposites in Organic Dyes Photodegradation

The Properties and Activity of TiO2/beta‐SiC Nanocomposites in Organic Dyes Photodegradation

Effective removal of methylene blue from aqueous solution using a new magnetic iron oxide nanosorbent prepared by combustion synthesis

Hydrothermal synthesis and enhanced photocatalytic activity of ternary Fe2O3/ZnFe2O4/ZnO nanocomposite through cascade electron transfer

Contact Info

Product

Resources

About

The Properties and Activity of TiO₂/beta‐SiC Nanocomposites in Organic Dyes Photodegradation

The Properties and Activity of TiO₂/beta‐SiC Nanocomposites in Organic Dyes Photodegradation

Hydrothermal synthesis and enhanced photocatalytic activity of ternary Fe₂O₃/ZnFe₂O₄/ZnO nanocomposite through cascade electron transfer