Covalent or ionic bonding of Eosin Y to silica: New visible-light photocatalysts for redox wastewater remediation

Blázquez-Moraleja, Alberto; Bosio, Antonio; Gamba, Sara; Bosca, Francisco; Marin, M. Luisa

doi:10.1016/j.jece.2023.111024

Journal of Environmental Chemical Engineering

2023

DOI: 10.1016/j.jece.2023.111024

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Covalent or ionic bonding of Eosin Y to silica: New visible-light photocatalysts for redox wastewater remediation

Alberto Blázquez-Moraleja,

Antonio Bosio,

Sara Gamba

et al.

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2024

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Cited by 2 publications

References 48 publications

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Immobilized Eosin Y on Modified Silica Nanoparticles and their Applications in Organic Synthesis

Guadalupe Martin,

Clavero,

Martín

et al. 2024

Eur J Org Chem

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The development of novel photocatalytic systems is crucial for advancing sustainable chemical processes in organic synthesis. In this study, we report the preparation, characterization, and application of a heterogeneous photocatalyst based on Eosin Y (EY) covalently immobilized on silica nanoparticles (SNPs). The SNPs‐EY photocatalyst was thoroughly characterized using various techniques, including SEM, TEM, X‐ray diffraction, UV‐vis diffuse reflectance spectroscopy, solid‐state fluorescence spectroscopy, XPS, FT‐IR, TGA, and DLS. These analyses confirmed the successful immobilization of EY on SNPs and demonstrated the uniformity and favourable photophysical properties of the resulting hybrid material. The photocatalytic performance of SNPs‐EY was evaluated in a series of model reactions, including aza‐Henry reaction (cross‐dehydrogenative coupling), reduction of nitrocompounds, and photooxidation of dimethylanthracene. The reaction results demonstrated that SNPs‐EY is an effective and recyclable photocatalyst, offering yields comparable to or higher than those of homogeneous systems, while providing the advantages of easy separation and reuse. This study highlights the potential of SNPs‐EY as a versatile photocatalyst for various organic transformations, promoting the advancement of green and sustainable chemistry

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Immobilized Eosin Y on Modified Silica Nanoparticles and their Applications in Organic Synthesis

Guadalupe Martin,

Clavero,

Martín

et al. 2024

Eur J Org Chem

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Enhancing Emerging Pollutant Removal in Industrial Wastewater: Validation of a Photocatalysis Technology in Agri-Food Industry Effluents

Fabregat

2024

Applied Sciences

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Emerging pollutants in wastewater pose significant risks to human health and wildlife, particularly due to their persistence in treated effluents from WWTPs. Very recent research has focused on developing new techniques based on advanced oxidation processes using inorganic and organic photocatalysts for treating polluted effluents under visible light. This study investigates a pesticide-removal system utilizing heterogeneous photoactive polymeric materials P2, P3, and P4. These materials, engineered as hydrophilic polymeric microparticles and functionalized with Rose Bengal, have demonstrated efficient singlet oxygen generation and first-order kinetics in the degradation of AHMPD, a pyrimidine fungicide. Given that most studies in the literature have concentrated on urban WWTPs, with less emphasis on industrial wastewater treatment, this research focused on real water samples from the effluent of an industrial WWTP in the agri-food sector, which processes large volumes of citrus and where high concentrations of AHMPD and other pesticides were detected at certain times of the year. The degradation potential of photoactive materials P3 and P4 was evaluated, achieving removal rates of AHMPD up to 85% under conditions of pH = 11 with 48 h of exposure to visible light.

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Covalent or ionic bonding of Eosin Y to silica: New visible-light photocatalysts for redox wastewater remediation

Cited by 2 publications

References 48 publications

Immobilized Eosin Y on Modified Silica Nanoparticles and their Applications in Organic Synthesis

Immobilized Eosin Y on Modified Silica Nanoparticles and their Applications in Organic Synthesis

Enhancing Emerging Pollutant Removal in Industrial Wastewater: Validation of a Photocatalysis Technology in Agri-Food Industry Effluents

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