Photodegradation of methylene blue and some emerging pharmaceutical micropollutants with an aqueous suspension of WZnO-NH2@H3PW12O40 nanocomposite

Tayebee, Reza; Esmaeili, Effat; Maleki, Behrooz; Khoshniat, A.; Chahkandi, Mohammad; Mollania, Nasrin

doi:10.1016/j.molliq.2020.113928

Cited by 56 publications

(23 citation statements)

References 54 publications

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Section: Photodegradation Studiesmentioning

confidence: 70%

“…The absorption spectrum of MB presents a distinct band at 664 nm, attributed to the auxochromic group of MB. The decrease in intensity of this peak (as observed in Figure 6) is related to the MB bleaching/degradation of this specific group [40]. The increase in photodegradation efficiency for the composite material is most likely correlated with a mechanism similar to the "absorb and shuttle" mechanism.…”

Section: Photodegradation Studiesmentioning

confidence: 83%

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Iron Oxide/Phosphatic Materials Composites with Potential Applications in Environmental Protection

et al. 2020

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Currently, hydroxyapatite is probably the most researched material, due to its multiple applications in medical, environmental, or cultural heritage, when the classical structure is modified and calcium is displaced partially or totally with different metals. By changing the classical structure of the hydroxyapatite, new morphologies can be obtained, thus allowing final applications different from those of the initial hydroxyapatite material. However, their properties should be tuned for the desired application. In this context, the present paper describes the synthesis and characterization (through energy-dispersive X-ray fluorescence, X-ray diffraction, FTIR, thermal analysis, and transmission electron microscopy) of iron oxide/manganese-containing phosphatic phase composite materials, developed in order to obtain the enhancement of final environmental applications (photodegradation of dyes, adsorption of organic compounds). The composite material was tested for photocatalytic properties, after embedding in hydrosoluble film-forming materials. Photocatalytic coatings show different activity during the photodecomposition of Methylene Blue, used as a model of a contaminant. The photocatalytic activities of the materials were discussed in relationship with both the phosphatic materials and the magnetic components. Finally, other environmental applications were studied for the developed materials (adsorption of non-steroidal anti-inflammatory drugs—paracetamol and ibuprofen), revealing an enhancement of the adsorption capacity of the phosphatic material upon addition of the magnetic phase.

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Section: Photodegradation Studiesmentioning

confidence: 70%

Section: Photodegradation Studiesmentioning

confidence: 83%

Iron Oxide/Phosphatic Materials Composites with Potential Applications in Environmental Protection

et al. 2020

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“…These active species again react with organic pollutants to form degradation products like water, carbon dioxide, and other mineralized nontoxic products. [33][34][35] Both direct and indirect photocatalysis occur at the same time. However, the principal degradation path depends on the nature of the species' physicochemical interaction with the catalyst surface.…”

Section: Mechanism Of Adsorptive Assisted Photocatalytic Dye Degradationmentioning

confidence: 99%

Review of the Advancements on Polymer/Metal Oxide Hybrid Nanocomposite‐Based Adsorption Assisted Photocatalytic Materials for Dye Removal

2021

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The use of dyes increases with increasing dye processing industries, especially with textile industries. The persistent nature, environmental toxicity, and carcinogenicity of dyes become the current issue of managing their impact on the ecosystem. Hence various methods of discharging have been reported. Most of the technologies were not effective in the removal process and generate secondary pollutants. However, adsorption supported photocatalytic process becomes a feasible, eco‐friendly, and appropriate technique. Based on these directions, developing such photocatalytic material for dye removal becomes the trend in current research. Thus, this review deals with dye removal through an adsorptive‐assisted photocatalytic process by various hybrid nanocomposite photocatalysts. Particular emphasis on photocatalytic dye degradation progresses by polymer/metal oxide hybrid nanocomposite photocatalysts (metal oxide nanoparticles with conductive, nonconductive, and both conductive & non‐conductive polymers composites) synthesis and dye degradation mechanisms. Besides, the kinetics, efficiency of degradation, and related factors were also assessed. Conversion of dyes to water, carbon dioxide, and other mineralized non‐toxic pollutants makes this technique the most preferred.

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“…In the photocatalytic process, the semiconductor material gets exposed to a light resource that has energies equal to or larger than their strip gaps. The radiation therefore fosters the stimulation of electrons that facilitate the generation of hydroxyl radicals ( • OH) and other intervening species such as O •− 2 and HO • 2 that have high oxidation capacity and can function to degrade organic contaminants of concern with even lower levels Sustainability 2021, 13, 4670 2 of 12 (<100 ppm) [8,9]. Wide-bandgap semiconductor oxides, comprising TiO 2 , SnO 2 , ZnO, and WO 3 [8][9][10][11][12][13][14], and metal salts (CdS and PbS) [15,16] have been utilized in light-mediated photosensitizers for the oxygenation and reduction of organic molecules.…”

Section: Introductionmentioning

confidence: 99%

“…The radiation therefore fosters the stimulation of electrons that facilitate the generation of hydroxyl radicals ( • OH) and other intervening species such as O •− 2 and HO • 2 that have high oxidation capacity and can function to degrade organic contaminants of concern with even lower levels Sustainability 2021, 13, 4670 2 of 12 (<100 ppm) [8,9]. Wide-bandgap semiconductor oxides, comprising TiO 2 , SnO 2 , ZnO, and WO 3 [8][9][10][11][12][13][14], and metal salts (CdS and PbS) [15,16] have been utilized in light-mediated photosensitizers for the oxygenation and reduction of organic molecules. Nevertheless, there are certain practical inconveniences associated with the implementation of high concentrations of such elements to rapidly mineralize chemical species of environmental concern, in addition to causing detriment to humans and aquatic ecosystems, given their temporary stability.…”

Section: Introductionmentioning

confidence: 99%

Research on the Sustainable Heterogeneous Catalyst Development for Photocatalytic Treatment of Phenol

Zhang

Wen-Rui

2021

Sustainability

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A large amount of wastewater from various and discharged sources that are not treated in any way could affect properties of both land and water, causing severe problems for the environment. Advanced oxidation processes seem to be a feasible option to address effluent treatment with regard to salvation of the environment. In this work, a CdO/ZnO/Yb2O3 composite composed of trimetallic semiconductors was synthesized through a simple one-pot hydrophile approach at low temperatures and then was employed as a photocatalyst. The degradation of phenol, a common organic persistent pollutant in industrial wastewater, was efficiently catalyzed in the presence of simulated sunlight. It was demonstrated that the synthesized CdO/ZnO/Yb2O3 photocatalyst was significantly active after 15 min of reaction and facilitated the effective degradation of the phenol. The CdO/ZnO/Yb2O3 photocatalyst achieved 71.5% and 97.81% degradation of the phenol without and with the existence of H2O2, correspondingly. The results show that the synthesized composite possesses high oxygen reduction capability and is available for rapid and potent photodegradation of the organic persistent pollutants such as phenol, with minimal damage to the environment.

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Photodegradation of methylene blue and some emerging pharmaceutical micropollutants with an aqueous suspension of WZnO-NH2@H3PW12O40 nanocomposite

Cited by 56 publications

References 54 publications

Iron Oxide/Phosphatic Materials Composites with Potential Applications in Environmental Protection

Iron Oxide/Phosphatic Materials Composites with Potential Applications in Environmental Protection

Review of the Advancements on Polymer/Metal Oxide Hybrid Nanocomposite‐Based Adsorption Assisted Photocatalytic Materials for Dye Removal

Research on the Sustainable Heterogeneous Catalyst Development for Photocatalytic Treatment of Phenol

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