Evaluation of the use of free or supported phenalenone based on natural halloysite for phenol photodegradation in aqueous solution

Aimeur, Maya; Baudu, Michel; Zermane, Faiza; Joussein, Emmanuel; Bouras, Omar

doi:10.1016/j.jphotochem.2020.112904

Cited by 11 publications

(2 citation statements)

References 37 publications

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“…Next, we tested MNP–PMAO–PN as an alternative decontamination method for the degradation of AB10B in water. PN in solution, or supported on clays, has been previously proposed for the photodegradation of contaminants in wastewaters, , but it has not been used in combination with MNPs. We obtained significant photodegradation in 2 h with a small amount of PN, while the MNP–polymer nanomaterial can be thoroughly removed in a few minutes by magnetic decantation, which would allow its reutilization.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Nanoparticle–Polymer Composites Loaded with Hydrophobic Sensitizers for Photodegradation of Azoic Dyes

Aiello

Lavorato

Azcárate

et al. 2022

ACS Appl. Nano Mater.

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Oleate-protected iron oxide magnetic nanoparticles (MNPs) were encapsulated with amphiphilic comb polymer poly(maleic anhydride alt-1-octadecene) (PMAO) in order to achieve the phase transfer to aqueous media and to load the resulting MNP–PMAO assemblies with phenalenone (PN), a hydrophobic photosensitizer with a quantum yield of singlet oxygen production close to unity. Steady-state fluorescence measurements complemented with density functional theory calculations, together with emission lifetime experiments, led us to conclude that PN molecules in the hybrid nanomaterial are indeed localized in a hydrophobic environment. In addition, laser flash-photolysis assays confirmed the generation of the triplet state of PN and its quenching by O2, an indication of the formation of singlet molecular oxygen (1O2). For monodisperse magnetic nanocubes (MNCs) 23 nm in edge length, the MNC–PMAO–PN nanohybrids can be efficiently removed by magnetic decantation. We performed photodegradation experiments of azoic derivative acid black 10B (AB10B), a dye commonly used in the cosmetic industry and which is found in wastewaters. Irradiation of a 0.01 mM AB10B solution for 120 min in the presence of the MNC–PMAO–PN assemblies (200 mg L−1, expressed as iron oxide concentration) led to a 76% decomposition of the dye at pH around 6. Unlike other methods based on Fenton processes, our strategy reaches a significant photodegradation efficiency without the addition of H2O2 or acids. Similar systems could be used to encapsulate hydrophobic photosensitizers for other purposes, such as bacterial inactivation and combined photodynamic and magnetic hyperthermia therapies.

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Section: Introductionmentioning

confidence: 99%

Magnetic Nanoparticle–Polymer Composites Loaded with Hydrophobic Sensitizers for Photodegradation of Azoic Dyes

Aiello

Lavorato

Azcárate

et al. 2022

ACS Appl. Nano Mater.

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“…Photodegradation is a simple and easy-to-implement method of degradation . Photocatalytic technology has been successfully used to treat air and wastewater pollutants − including plastics. , Under ultraviolet (UV) light, PU degrades mainly through chain breaking and oxidation. Photosensitizers can accelerate PU photodegradation as they generate free radicals under UV light, which attack the macromolecular chain of PU. , Iron stearate (FeSt 3 ) is a cheap and environmentally friendly photosensitizer.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of Bio-Based Polyurethane Controlled Release Urea Coating with Photosensitivity

et al. 2022

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In order to improve the photodegradation ability of fertilizer coating material and realize the sustainability of fertilizers, in this study, the commercially available photosensitive iron stearate (FeSt 3 ) was wet-ground into submicrometer FeSt 3 (SFeSt 3 ) particles and used in preparation of a SFeSt 3 -modified bio-based polyurethane (PU)-coated controlled release urea (PU-SFe-CRU). The results showed that after 1 month photodegradation, the coating material had significant yellowing, the oxygen content of SFeSt 3 -modified PU (PU-SFe) increased by 56.89%, and its structure became more porous and looser than PU. The thermal stability of PU-SFe decreased, and more intermediate products were produced after exposure to UV light. The germination experiment showed that PU-SFe before and after photodegradation (up to 60 mg/L) had no adverse effect on the seed germination and bud growth of rice. Additionally, PU-SFe had a significantly higher Cr adsorption capacity after photodegradation due to the increase of the oxygen-containing group and specific surface. This study provides a theoretical basis for the research and development of photodegradable environment-friendly controlled release urea.

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Sunlight-induced photocatalytic degradation of organic pollutants by biosynthesized hetrometallic oxides nanoparticles

Rani

Keshu

Shanker

2021

Environ Sci Pollut Res

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Evaluation of the use of free or supported phenalenone based on natural halloysite for phenol photodegradation in aqueous solution

Cited by 11 publications

References 37 publications

Magnetic Nanoparticle–Polymer Composites Loaded with Hydrophobic Sensitizers for Photodegradation of Azoic Dyes

Magnetic Nanoparticle–Polymer Composites Loaded with Hydrophobic Sensitizers for Photodegradation of Azoic Dyes

Preparation and Properties of Bio-Based Polyurethane Controlled Release Urea Coating with Photosensitivity

Sunlight-induced photocatalytic degradation of organic pollutants by biosynthesized hetrometallic oxides nanoparticles

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