Parameters that affect the photodegradation of dyes and pigments in solution and on substrate – An overview

Groeneveld, Iris; Kanelli, Maria; Ariese, Freek; Bommel, Maarten R. van

doi:10.1016/j.dyepig.2022.110999

Cited by 75 publications

(35 citation statements)

References 131 publications

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“…A higher dye concentration reduces photodegradation efficiencies and reaction rates. Various organic dyes and catalysts have been studied for different classes of organic dyes, all supporting the statement above …”

Section: Resultssupporting

confidence: 66%

TiO₂-Decorated by Nano-γ-Fe₂O₃ as a Catalyst for Efficient Photocatalytic Degradation of Orange G Dye under Eco-friendly White LED Irradiation

Halfadji,

Chougui,

Djeradi

et al. 2023

ACS Omega

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Azo dyes make up a major class of dyes that have been widely studied for their diverse applications. In this study, we successfully applied nano-γ-Fe 2 O 3 /TiO 2 as a nanocatalyst to improve the photodegradation efficiency of azo dyes (Orange G (OG) dye as a model) from aqueous solution under white lightemitting diode (LED) irradiation. We also investigated the degradation mechanisms and pathways of OG dye as well as the effects of the initial pH value, amount of H 2 O 2 , catalyst dosage, and dye concentration on the degradation processes. The characterizations of nano-γ-Fe 2 O 3 and γ-Fe 2 O 3 Nps/TiO 2 were carried out using various techniques, including X-ray diffractometry, scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, and UV− visible spectroscopy. The efficiency of the photodegradation reaction of OG was found to follow pseudo-first-order kinetics (Langmuir−Hinshelwood model) with a rate constant of 0.0338 min −1 and an R 2 of 0.9906. Scavenger experiments revealed that hydroxyl radicals and superoxide anion radicals were the dominant species in the OG photocatalytic oxidation mechanism. This work provides a new method for designing highly efficient heterostructure-based photocatalysts (γ-Fe 2 O 3 Nps/TiO 2 ) based on LED light irradiation for environmental applications.

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Section: Resultssupporting

confidence: 66%

TiO₂-Decorated by Nano-γ-Fe₂O₃ as a Catalyst for Efficient Photocatalytic Degradation of Orange G Dye under Eco-friendly White LED Irradiation

Halfadji,

Chougui,

Djeradi

et al. 2023

ACS Omega

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“…At 1000‐ppm catalyst, degradation efficiency dropped to 55.5%. The suspension's turbidity prevents light from penetrating the dye, reducing catalyst activation as concentration increases 30 . Thus, the degradation rate begins to decrease.…”

Section: Resultsmentioning

confidence: 99%

Solid state conversion of novel coordinated precursors to visible light active photocatalysts with enhanced photocatalytic activity

Hasan,

Ali,

Madkour

2023

Applied Organom Chemis

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The new polydentate N'1,N'3‐bis((E)‐3‐oxopentan‐2‐ylidene)malonohidrazide chelating agent (H2L) and its coordinated complexes of Co2+, Cu2+, and Ni2+ were prepared and characterized by elemental analysis, molar conductance, and spectra (Fourier transform infrared [FT‐IR], ultraviolet–visible spectroscopy [UV–vis], and Fast‐Atom Bombardment Mass Spectrometry (FAB‐MS). Also, thermal and magnetic investigations were conducted. X‐ray single crystal of the H2L ligand revealed a triclinic structure with space group P‐1. In this study, we provide a one‐pot preparation approach for transition metal oxide nanoparticles (NPs) such as CuO, Co3O4, and NiO NPs. The methodology entails the thermal decomposition of coordinated metal precursors in a solid‐state environment, obviating the necessity for agitation and rinsing. The remarkable significance of this method lies in its ability to produce highly pure NPs without the requirement of washing, and it allows for systematic and efficient production. Herein, we propose a large‐scale, environmentally benign and renewable, transition metals oxide NPs such as CuO, Co3O4, and NiO using solid‐state thermal degradation of their coordinated precursors. The NPs are subjected to analysis employing a range of techniques, such as X‐ray powder diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), N2 sorpometry (BET), and UV–vis). The photocatalytic activities of the synthesized NPs were assessed using photodegradation of organic contaminants in wastewater.

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“…They established that, over the course of a 60 min period, light intensity fluctuates by no more than 5000 Lux, and they discovered that, as shown in Fig. 9, 96 the maximum photocatalytic activity occurs between 50 × 10 3 and 55 × 10 3 Lux. Rao et al 97 performed the photocatalytic degradation of CV dye in the presence of ZnO photocatalyst, and they varied the light intensity and witnessed that the degradation efficiency increased with greater light intensities.…”

Section: Intensitymentioning

confidence: 98%

“…The influence that light intensity has on the photofading process is not, however, established as a universal connection. 96 Ilyas et al 90 investigated how sunlight intensity affected the photocatalytic degradation of CV utilizing bismuth vanadate (Vm-BiVO 4 ) and found that at higher light intensities, electron-hole generation rises. Low light intensity makes it difficult for photogenerated charges to separate from one another, which prevents the generation of secondary reactive radicals (•OH and • O 2 − ).…”

Section: Intensitymentioning

confidence: 99%

An overview of prominent factors influencing the photocatalytic degradation of cationic crystal violet dye employing diverse nanostructured materials

Shabna,

Singh,

Dhas

et al. 2024

J of Chemical Tech & Biotech

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Crystal violet (CV), a cationic dye, has been demonstrated to be a powerful carcinogen, a mitotic toxin and poisonous to mammalian cells such that the predominant presence of the dye invariably causes several effects of destruction to mankind and it necessitates a clarion call to do away with this nuisance before it can produce a snowball effect. The recent widespread reporting of the photocatalysis‐mediated degradation of CV as an emerging technique for removing this dangerous dye from aqueous mediums highlights its effectiveness. Numerous researchers have contributed substantially to describing how photocatalysis‐based nanomaterials could be used to degrade CV. The fundamentals and the factors that predominantly influence CV degradation are highlighted in this work. These factors include the nature of nanomaterials, catalyst concentration, dye dosage, pH of the solution in use, temperature and light intensity. Additionally, thorough kinetics and mechanistic descriptions are also included to give crucial insights into the light‐mediated reaction of CV. The present study's findings have the potential to alleviate practitioners and researchers of the burden of having to navigate through numerous studies under each category of parameters to get an exhaustive overview of all of the different variables that may affect the photocatalytic degradation of CV dye. In order to further enhance the photocatalytic degradation efficiency of CV, researchers can expand on this study by investigating novel strategies to lessen the impact of certain elements that adversely affect the photocatalytic reaction process. The potential prospects for extending the advancement of scientific study in this area are also explored. © 2024 Society of Chemical Industry (SCI).

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Parameters that affect the photodegradation of dyes and pigments in solution and on substrate – An overview

Cited by 75 publications

References 131 publications

TiO₂-Decorated by Nano-γ-Fe₂O₃ as a Catalyst for Efficient Photocatalytic Degradation of Orange G Dye under Eco-friendly White LED Irradiation

TiO₂-Decorated by Nano-γ-Fe₂O₃ as a Catalyst for Efficient Photocatalytic Degradation of Orange G Dye under Eco-friendly White LED Irradiation

Solid state conversion of novel coordinated precursors to visible light active photocatalysts with enhanced photocatalytic activity

An overview of prominent factors influencing the photocatalytic degradation of cationic crystal violet dye employing diverse nanostructured materials

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Parameters that affect the photodegradation of dyes and pigments in solution and on substrate – An overview

Cited by 75 publications

References 131 publications

TiO2-Decorated by Nano-γ-Fe2O3 as a Catalyst for Efficient Photocatalytic Degradation of Orange G Dye under Eco-friendly White LED Irradiation

TiO2-Decorated by Nano-γ-Fe2O3 as a Catalyst for Efficient Photocatalytic Degradation of Orange G Dye under Eco-friendly White LED Irradiation

Solid state conversion of novel coordinated precursors to visible light active photocatalysts with enhanced photocatalytic activity

An overview of prominent factors influencing the photocatalytic degradation of cationic crystal violet dye employing diverse nanostructured materials

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Product

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TiO₂-Decorated by Nano-γ-Fe₂O₃ as a Catalyst for Efficient Photocatalytic Degradation of Orange G Dye under Eco-friendly White LED Irradiation

TiO₂-Decorated by Nano-γ-Fe₂O₃ as a Catalyst for Efficient Photocatalytic Degradation of Orange G Dye under Eco-friendly White LED Irradiation