Photocatalytic Degradation of Organic Dyes by Magnetite Nanoparticles Prepared by Co-Precipitation

International Journal of Molecular Sciences, Год журнала: 2024, Номер 25(14), С. 7876 - 7876

Опубликована: Июль 18, 2024

Iron oxide nanoparticles were synthesized by co-precipitation using three different iron salt stoichiometric mole ratios. Powder X-ray diffraction patterns revealed the inverse cubic spinel structure of magnetite oxide. Transmission electron microscopic images showed Fe3O4 with shapes and average particle sizes 5.48 nm for Fe3O4-1:2, 6.02 Fe3O4-1.5:2, 6.98 Fe3O4-2:3 an energy bandgap 3.27 to 3.53 eV. The as-prepared used as photocatalysts degrade brilliant green (BG), rhodamine B (RhB), indigo carmine (IC), methyl red (MR) under visible light irradiation. photocatalytic degradation efficiency 80.4% was obtained from Fe3O4-1:2 green, 61.5% Fe3O4-1.5:2 B, 77.9% 73.9% both red. This indicates that is more efficient in than one dye. study shows degrades most effectively at pH 9, best 6.5, efficiently 3. Recyclability experiments can be recycled four times are photostable.

Язык: Английский

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Quince (Cydonia oblonga) seed hydrogel-based green synthesis of copper oxide nanoparticles for photocatalytic degradation of methylene blue and methyl orange

Desalination and Water Treatment, Год журнала: 2024, Номер 318, С. 100388 - 100388

Опубликована: Апрель 1, 2024

Organic dyes discharged from various industries pose a significant hazard to humans and the environment, valid approach is needed remove dangerous harmful substances industrial effluents. The present study synthesized novel CuO nanoparticles (CuO NPs) using hydrogel derived C. oblonga seeds. green synthesis of NPs was confirmed visually by formation black precipitates. as-prepared exhibited prominent peak at wavelength 379 nm an estimated band gap energy value 4.23 eV. FTIR analysis revealed distinguishing 594 cm-1 due Cu-O stretching vibrations. SEM images showed sheet-like with average size 69 nm. Further, EDX spectrum disclosed copper (31.1%) oxygen (32.6%) as main elements. At optimized reaction conditions irradiation time (120 mins), catalyst load (5.0 mg), dye solution (10 ppm), demonstrated degradation methylene blue (88.2%) methyl orange (83.1%), following pseudo-first-order kinetics. retained over 70% their initial photocatalytic efficiency for up three repetition cycles. Hence, seed could be excellent biomaterial developing green, sustainable, recyclable photocatalysts environmentally favourable applications.

Язык: Английский

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Removal of Dyes from Water Using Aluminum-Based Water Treatment Sludge as a Low-Cost Coagulant: Use of Response Surface Methodology

Water, Год журнала: 2024, Номер 16(10), С. 1400 - 1400

Опубликована: Май 14, 2024

The aim of this research was to valorize waste (sludge) from a drinking water treatment plant as coagulant in the removal dyes (methylene blue and crystal violet) prevent environmental issues associated with sludge storage. To accomplish purpose, response surface methodology based on central composite design five levels implemented. In order enhance efficacy coagulation–flocculation process, three key operational variables were considered for optimization: pH, dosage (mg/L), initial dye concentration (mg/L). achieve this, quadratic polynomial model established. According mathematical that has been developed, it is predicted highest efficiency removing 94.44%. This maximum effectiveness reached when pH adjusted 12.04, dose set at 87.044 mg/L, MB maintained 2.955 mg/L. Conversely, best CV attained 100% under following conditions: = 12.045, R2 (98.44% 95.80% CV, respectively) validated both models. work, characterized by charge, FTIR, BET, SEM analysis.

Язык: Английский

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Merits photocatalytic activity of rGO/zinc copper ferrite magnetic nanocatalyst for photodegradation of methylene blue (MB) dye

Discover Nano, Год журнала: 2025, Номер 20(1)

Опубликована: Янв. 4, 2025

Abstract The world is now facing a water scarcity crisis due to waste, pollution, and uneven distribution of freshwater resources, which are limited. Thus, the creation innovative, economical, effective methods for purifying crucial. Here, photo-assisted degradation methylene blue (MB) dye under visible light UV was achieved by using RGO photocatalyst loaded with Zn 0.5 Cu Fe 2 O 4 in three different 10%, 20%, 30% called MRGO 10, 20, 30. Furthermore, all prepared samples characterized X-ray diffraction (XRD), fourier transformation infrared (FTIR), transmission electron microscope (TEM), vibrating sample magnetometer (VSM) Raman analysis. After 40 min, high photocatalytic efficacy effectively eliminated about 95.2% 10 ppm MB 20 mg NPs at pH9 Visible light. From results, activity reduced 54.6% after five cycles degradation. produced samples' observed both may encourage continued research into more photocatalysts filtration water.

Язык: Английский

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Comparative photocatalytic degradation of cationic rhodamine B and anionic bromocresol green using reduced ZnO: A detailed kinetic modeling approach

Chemosphere, Год журнала: 2025, Номер 371, С. 144052 - 144052

Опубликована: Янв. 11, 2025

Язык: Английский

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