Photocatalytic degradation of methyl blue dye with H₂O₂ sensing

RSC Advances, Journal Year: 2024, Volume and Issue: 14(21), P. 14606 - 14615

Published: Jan. 1, 2024

ZnO nanoparticles impregnated polymer for the degradation of methyl blue dye with H 2 O sensing colorimetrically and fluorometrically.

Language: Английский

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Synergistic degradation of toxic azo dyes using Mn-CuO@Biochar: An efficient adsorptive and photocatalytic approach for wastewater treatment

Chemical Engineering Science, Journal Year: 2024, Volume and Issue: unknown, P. 120844 - 120844

Published: Oct. 1, 2024

Language: Английский

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Synthesis of Ionic Liquid-Assisted Nanoparticles: High Activity, Fast Removal for Photodegradation of Methylene Blue in Water

Water Air & Soil Pollution, Journal Year: 2025, Volume and Issue: 236(2)

Published: Jan. 9, 2025

Abstract The discharge of dye residues from the textile industry is a major contributor to water pollution, highlighting urgent need for effective wastewater treatment solutions. This study investigates synthesis ZnO and Bi₂O₃ nanoparticles using ionic liquid-assisted methods enhanced photocatalytic degradation methylene blue. Three liquids were employed: 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM]-BF₄), hexafluorophosphate ([BMIM]-PF₆), chloride ([BMIM]-Cl). synthesized characterized X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), photoluminescence (PL) spectroscopy. Results showed that liquid incorporation led improved crystallinity, uniform morphology, reduced particle sizes. ZnO-[BMIM]-BF₄ (1%) Bi₂O₃-[BMIM]-BF₄ exhibited lowest band gap energies 2.50 eV 2.20 respectively, indicating light absorption. These catalysts also demonstrated superior activity, achieving complete blue within 40 35 min under UV-B irradiation, 60 sunlight. performance was attributed absorption, electron–hole recombination, efficient charge transfer facilitated by liquids. excellent stability over multiple cycles. highlights potential in developing highly stable photocatalysts environmental remediation applications. Graphical

Language: Английский

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Analysis of Photocatalytic Properties of Poly(Methyl Methacrylate) Composites with Titanium(IV) and Ruthenium(III) Complexes

Applied Sciences, Journal Year: 2025, Volume and Issue: 15(4), P. 1679 - 1679

Published: Feb. 7, 2025

This study explores poly(methyl methacrylate) (PMMA)-based composites as potential alternatives to conventional TiO2-based photocatalysts. Specifically, it examines PMMA enriched with oxo–titanium(IV) complexes, [Ti8O2(OiPr)20(man)4] (1), [Ti4O(OiPr)10(O3C14H8)2] (2), and [Ti6O4(OiPr)2(O3C14H8)4(O2CEt)6] (3), alongside ruthenium(III) K[Ru(Hedta)Cl]∙2H2O (4) [Ru(pic)3]·H2O (5). We assessed the physicochemical, adsorption, photocatalytic properties of these structural analyses (Raman spectroscopy, X-ray absorption (XAS), SEM-EDX), confirming stability complexes within matrix. Composites containing titanium(IV) compounds demonstrated notably higher efficiency than those complexes. Based on activity profiles, were categorized into three types: (i) UV-light active (complexes (1) (2)), (ii) visible-light (5)), (iii) dual-range (complex (3)). The results highlight strong titanium(IV)–PMMA for UV-driven photocatalysis. Moreover, their can be extended visible range after modifications. Ruthenium(III)–PMMA composites, in turn, showed superior performance under light. Overall, or demonstrate promising applications using both UV light ranges.

Language: Английский

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Enhanced methylene blue degaradation and miniralization through activated persulfate coupled with magnetic field

Cleaner Engineering and Technology, Journal Year: 2024, Volume and Issue: unknown, P. 100822 - 100822

Published: Oct. 1, 2024

Language: Английский

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Evaluating the Photocatalytic Activity of Green Synthesized Iron Oxide Nanoparticles

Catalysts, Journal Year: 2024, Volume and Issue: 14(11), P. 751 - 751

Published: Oct. 25, 2024

Water pollution from dyes is a major environmental challenge, demanding advanced materials for efficient degradation. In this study, we synthesized iron oxide nanoparticles (IONPs) using an aqueous extract of Senegalia catechu leaves and evaluated their photocatalytic activity in methylene blue (MB) dye degradation under sunlight irradiation. The IONPs were characterized by UV-visible spectroscopy (UV–vis), Fourier Transform Infrared Spectroscopy (FT-IR), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive (EDS). XRD pattern showed highly crystalline structure with average crystallite size 34.7 nm, while SEM images revealed predominantly spherical particles uneven surface texture. Photocatalytic efficiency exceeded 80% MB after 120 min exposure. Optimization catalyst dose, pH, concentration, other parameters essential maximizing efficiency. demonstrated reusability over four cycles, retaining effective performance. This study underscores the potential green-synthesized as eco-friendly photocatalysts wastewater treatment remediation.

Language: Английский

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Photolytic Degradation of Methylene Blue: The Effect of Various Factors on Wastewater Treatment Efficiency

Asian Journal of Chemical Sciences, Journal Year: 2025, Volume and Issue: 15(1), P. 41 - 52

Published: Jan. 16, 2025

In Ivory Coast, dyes are widely used in traditional textile dyeing. It's a lucrative business that is attracting more and people. Unfortunately, the wastewater from these dyeing units discharged directly continuously into immediate environment. This poses risk to human health Among dyes, frequently methylene blue (MB) can disrupt balance of aquatic ecosystems by affecting survival organisms, inhibit photosynthesis exposed plants, cause irritation or toxic effects humans event prolonged exposure. work investigated degradation (MB), model dye, photolysis. The following parameters were studied: initial dye concentration, pH, H2O2, NaI, NaCl, NaCl combined with H2O2 NaI. experiments monitored using UV-visible spectrophotometer. results showed MB be effectively degraded direct photolysis basic medium at very low concentrations. Additionally, NaI had significant positive effect (83.77 % 92 %) contrast (6.23 %). Furthermore, treatment solution was enhanced when rate 88.1 84.9 %, respectively. kinetic study revealed UV irradiation described both zero-order first second-order kinetics. conclusion, UV/H2O2, UV/NaI, UV/NaCl+ UV/NaCl+NaI systems represent interesting alternative processes for containing neutral pH. These methods particularly suitable industries involved other activities generating dye-contaminated effluents, offering an efficient environmentally friendly mitigating water pollution meeting regulatory standards.

Language: Английский

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Fenton-like photocatalytic oxidation and adsorption performance of MXene/g-C3N4 heterostructures under H2O2 oxidizer: experimental & modeling approach

Discover Catalysis., Journal Year: 2025, Volume and Issue: 2(1)

Published: Feb. 13, 2025

The rapid growth of textile industry has negatively impacted the health and quality clean water sources, leading to an increase in pollution disaster. To address these significant effluent issues, there is a strong need for improved effective environmental remediation processes treat effluents containing organic contaminants. present research explores photocatalytic adsorption capabilities MXene/g-C3N4 discoloration methylene blue (MB) by introducing oxidizing agent, such as hydrogen peroxide (H2O2). best our knowledge, this study first one demonstrate that photocatalyst could efficiently activate H2O2, reducing MB concentration up 99.71% 81.88% 240 min via photocatalysis processes, respectively. addition H2O2 oxidant system rapidly reduced recombination rate photogenerated electrons-hole pairs producing powerful hydroxyl superoxide radicals Fenton-like oxidation process. Langmuir–Hinshelwood kinetic modeling excellently described degradation MB, showing highest R2 value 0.9896. thermodynamic parameters, including Gibbs free energy (ΔG° = − 28.203 30.095 kJ/mol), entropy (ΔS° 94.558 kJ/mol K, enthalpy (ΔH° 25.255 activation (Ea 11.066 confirmed spontaneous favorable degradation. reduction ΔG° contributed expansion photocatalyst's pores, while positive ΔS° at higher temperatures indicated system, encouraging diffusion towards MXene/g-C3N4. In modeling, followed intraparticle kinetics Temkin isotherms, with values 0.9906 & 0.9965, A series heterostructure photocatalysts (1, 4, 8 12 wt. %) was synthesized wet impregnation method characterized through TEM FESEM characterizations. This work provides new insights into application improvement oxidizer.

Language: Английский

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Hydroxyapatite coating on ZnO nanoparticles for ultraviolet filter agents

Surface Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 13, 2025

This experimental work aimed to investigate the effects of hydroxyapatite (HAp) coating on zinc oxide (ZnO) nanoparticles and extent which HAp improves protective efficacy ZnO-based sunscreen against UV radiation. First, HAp-coated ZnO were synthesized characterized. Afterwards, they mixed into a basic lotion. Precipitation spray methods applied in synthesis process nanoparticles, then continued with series characterizations using XRF, XRD, UV-vis DRS, SEM-EDS. The results show that an surfaces can make this nanomaterial's optical band gap wider. Also, it makes less capable both absorbing light performing photocatalytic reactions. Furthermore, layer effectively increases radiation reflectance sunscreens. Therefore, is reasonable assume will improve inorganic protection

Language: Английский

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Photocatalytic activity of cobalt-doped Cd1-xAl0.2Fe1.8O4 (0,0.3) spinel ferrite for atrazine degradation

Reaction Kinetics Mechanisms and Catalysis, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 19, 2025

Language: Английский

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