Preparation of ZnFe2O4/ZnO composite: Effect of operational parameters for photocatalytic degradation of dyes under UV and visible illumination

Zouhier, Morad; Tanji, Karim; Navı́o, J.A.; Hidalgo, M.C.; Jaramillo-Páez, C.; Kherbeche, Abdelhak

doi:10.1016/j.jphotochem.2019.112305

Cited by 66 publications

(22 citation statements)

References 52 publications

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“…Zouhier and collaborates have reported previously a similar nanocomposite of ZnO and ZnFe 2 O 4 with slightly different physicochemical properties. [25] Comparing to the product prepared by Zouhier, the variations on S BET values and XRD patterns could be related to the differences of the selected preparation methods. In other words, synthetic conditions play an important role in the physical properties of these nanocomposites.…”

Section: Resultsmentioning

confidence: 99%

“…In this work, a modified methodology for the preparation of a nanocomposite consisting of ZnFe 2 O 4 nanoparticles embedded into mesoporous ZnO was implemented at two different molar ratios. [25] Comparison of the performance of these FTIR spectra for the prepared materials are depicted in Figure 1. From these results, Figure 1a corresponds to mesoporous ZnO nanoparticles, showing an absorption band fingerprint below 500 cm À 1 , corresponding to interatomic vibrations and matching to those reported on the literature.…”

Section: Resultsmentioning

confidence: 99%

“…This result correlate well to what has been reported. [25] The average crystallite size of all nanoparticles were calculated using Scherrer's equation,…”

Section: Resultsmentioning

confidence: 99%

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Recyclable and Photocatalytic Properties of ZnFe₂O₄/ZnO for Wastewater Treatment and Disinfection

Máynez-Navarro¹,

Méndez‐Rojas²,

Flores-Cervantes

et al. 2020

ChemistrySelect

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In this work, the magnetic and photocatalytic ZnFe2O4/ZnO, at two different ratios (1 : 1 and 1 : 8), have been prepared via a simple one‐step method. Characterization of the nanocomposite was performed using Dynamic Light Scattering (DLS), Fourier Transformed Infrared Spectroscopy (FTIR), X‐Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Brunauer‐Emmett‐Teller (BET) isotherm. The photocatalytic activity was evaluated by monitoring the photodegradation of methylene blue and the photo‐assisted bleaching of p‐nitrosodimethylaniline, under UV365nm irradiation. The photocatalytic performance is related to the amount of ZnO on the composite. Therefore, using ZnFe2O4/ZnO at 1 : 8 ratio (0.1 mg mL−1), efficiency of 80 % was achieved after 120 min. The material can be recovered magnetically and reused for at least three consecutive cycles without losing their activity. Water disinfection performance was also determined by measuring E. coli inactivation. Remarkably, ZnFe2O4/ZnO at 1 : 8 (0.1 mg mL−1) proved to be more effective for bacterial inactivation than ZnO alone, with an inactivation performance of 90 % after 15 min. Interestingly, these composites can be used as highly efficient photocatalysts for wastewater treatment and water disinfection, and are magnetically separable and reusable.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Recyclable and Photocatalytic Properties of ZnFe₂O₄/ZnO for Wastewater Treatment and Disinfection

Máynez-Navarro¹,

Méndez‐Rojas²,

Flores-Cervantes

et al. 2020

ChemistrySelect

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“…At the same time, using high temperatures implies increased energy consumption and higher costs. Altogether, photocatalysts with practical applicability need to be able to function at room temperature [74,82,83].…”

Section: Temperaturementioning

confidence: 99%

Advances and Challenges in Developing Efficient Graphene Oxide-Based ZnO Photocatalysts for Dye Photo-Oxidation

et al. 2020

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The efficient remediation of organic dyes from wastewater is increasingly valuable in water treatment technology, largely owing to the tons of hazardous chemicals currently and constantly released into rivers and seas from various industries, including the paper, pharmaceutical, textile, and dye production industries. Using solar energy as an inexhaustible source, photocatalysis ranks among the most promising wastewater treatment techniques for eliminating persistent organic pollutants and new emerging contaminants. In that context, developing efficient photocatalysts using sunlight irradiation and effectively integrating them into reactors, however, pose major challenges in the technologically relevant application of photocatalysts. As a potential solution, graphene oxide (GO)-based zinc oxide (ZnO) nanocomposites may be used together with different components (i.e., ZnO and GO-based materials) to overcome the drawbacks of ZnO photocatalysts. Indeed, mounting evidence suggests that using GO-based ZnO nanocomposites can promote light absorption, charge separation, charge transportation, and photo-oxidation of dyes. Despite such advances, viable, low-cost GO-based ZnO nanocomposite photocatalysts with sufficient efficiency, stability, and photostability remain to be developed, especially ones that can be integrated into photocatalytic reactors. This article offers a concise overview of state-of-the-art GO-based ZnO nanocomposites and the principal challenges in developing them.

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“…Consequently, the textile and dyeing industry has begun seeking efficient methods for the removal of dyes. Meanwhile, there are various treatment processes that have been investigated and employed extensively for dyes elimination from wastewater [8,9], including coagulation and flocculation [10], biological treatment using anaerobic granular [11], catalytic wet oxidation photochemical treatment [12][13][14], Fenton's process, and adsorption technology. However, many of these technologies are expensive and complex when used to treat these dyes.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Studies on the Removal of Textile Effluent over Two Natural Eco-Friendly Adsorbents

Assila

Tanji

Zouheir

et al. 2020

Journal of Chemistry

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This study investigates the possibility of applying an adsorption process using two abundant natural minerals M1 and M2. Without pretreatment or activation, the adsorbents were used to treat real textile wastewater samples (collected from Fez city, Morocco). As a cost-effective alternative, these materials were characterized by different analyses, including X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray fluorescence (XRF). Chemical oxygen demand (COD) and biological oxygen demand (BOD) were used to characterize the textile wastewater. Additionally, the influence of operating conditions (contact time, adsorbent dosages, and pH) was evaluated. Results show that the adsorption process takes place quickly, reaching the equilibrium at 90 and 160 min for M1 (88% COD) and M2 (79% COD). Both materials show a higher affinity to Cr (39%) and lower affinity to Cu (28%). A pseudo-second-order kinetic model provides the best fit to the experimental adsorption data. Germination tests indicate a low toxicity after the adsorption process. Performance of both materials was compared with that of other literature studies.

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Preparation of ZnFe2O4/ZnO composite: Effect of operational parameters for photocatalytic degradation of dyes under UV and visible illumination

Cited by 66 publications

References 52 publications

Recyclable and Photocatalytic Properties of ZnFe₂O₄/ZnO for Wastewater Treatment and Disinfection

Recyclable and Photocatalytic Properties of ZnFe₂O₄/ZnO for Wastewater Treatment and Disinfection

Advances and Challenges in Developing Efficient Graphene Oxide-Based ZnO Photocatalysts for Dye Photo-Oxidation

Adsorption Studies on the Removal of Textile Effluent over Two Natural Eco-Friendly Adsorbents

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Preparation of ZnFe2O4/ZnO composite: Effect of operational parameters for photocatalytic degradation of dyes under UV and visible illumination

Cited by 66 publications

References 52 publications

Recyclable and Photocatalytic Properties of ZnFe2O4/ZnO for Wastewater Treatment and Disinfection

Recyclable and Photocatalytic Properties of ZnFe2O4/ZnO for Wastewater Treatment and Disinfection

Advances and Challenges in Developing Efficient Graphene Oxide-Based ZnO Photocatalysts for Dye Photo-Oxidation

Adsorption Studies on the Removal of Textile Effluent over Two Natural Eco-Friendly Adsorbents

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Product

Resources

About

Recyclable and Photocatalytic Properties of ZnFe₂O₄/ZnO for Wastewater Treatment and Disinfection

Recyclable and Photocatalytic Properties of ZnFe₂O₄/ZnO for Wastewater Treatment and Disinfection