Advancing Dye Degradation: Integrating Microbial Metabolism, Photocatalysis, and Nanotechnology for Eco-Friendly Solutions

Bacteria, Journal Year: 2025, Volume and Issue: 4(1), P. 15 - 15

Published: March 7, 2025

Textile dyes pose a major environmental threat due to their toxicity, persistence in water bodies, and resistance conventional wastewater treatment. To address this, researchers have explored biological physicochemical degradation methods, focusing on microbial, photolytic, nanoparticle-mediated approaches, among others. Microbial depends fungi, bacteria, yeasts, algae, utilizing enzymatic pathways involving oxidoreductases like laccases, peroxidases, azoreductases breakdown or modify complex dye molecules. Photolytic employs hydroxyl radical generation electron-hole pair formation, while utilizes titanium dioxide (TiO2), zinc oxide (ZnO), silver (Ag) nanoparticles enhance removal. improve efficiency, microbial consortia been developed decolorization mineralization, offering cost-effective eco-friendly alternative methods. Photocatalytic degradation, particularly using TiO2, harnesses light energy for breakdown. Research advancements focus shifting TiO2 activation from UV visible through doping composite materials, optimizing surface area mesoporosity better adsorption. Nanoparticle-mediated approaches benefit high rapid adsorption, with ongoing improvements synthesis, functionalization, reusability, magnetic nanoparticle integration. These emerging technologies provide sustainable solutions degradation. The primary aim of this review is comprehensively evaluate synthesize current research the azo photolytic processes, nanotechnology-based approaches. also provides detailed information salient mechanistic aspects these efficiencies, advantages, challenges, potential applications industrial contexts.

Language: Английский

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Biosynthesis and characterization of iron oxide nanoparticles fabricated using cell-free supernatant of Pseudomonas fluorescens for antibacterial, antifungal, antioxidant, and photocatalytic applications

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Jan. 6, 2025

This study investigates the biosynthesis of iron oxide nanoparticles (Fe2O3NPs) using cell-free supernatant Pseudomonas fluorescens. The synthesized Fe2O3NPs were characterized through UV–VIS, XRD, FTIR, FESEM, EDX, TEM, BET, and VSM analyses. XRD results confirmed that successfully EDX analysis indicated accounted for 89.5% sample composition. Imaging via SEM TEM revealed average diameters 20.43 ± 5.38 nm 24.32 5.03 nm, respectively. antimicrobial effects assessed against four bacterial strains fungal species. Inhibition zones 8.35 0.103 mm 8.31 0.128 observed syringae Staphylococcus aureus at a concentration 400 μg mL−1 Fe2O3NPs. Antifungal efficacy showed growth rate reductions 90.4% Aspergillus niger, 71.1% Monilinia fructigena, 68.8% Botrytis cinerea, 84.2% Penicillium expansum, compared to controls. demonstrated photocatalytic degradation efficiencies 89.93%, 84.81%, 79.71% methyl violet, orange, methylene blue, Also exhibited significant DPPH free radical scavenger activity with an IC50 value 8.45 0.59 mL−1. study's findings underscored potential in addressing environmental pollution combating pathogenic microorganisms.

Language: Английский

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Evaluation of Physicochemical Properties of Cadmium Oxide (CdO)-Incorporated Indium–Tin Oxide (ITO) Nanoparticles for Photocatalysis

Journal of Composites Science, Journal Year: 2025, Volume and Issue: 9(1), P. 43 - 43

Published: Jan. 16, 2025

This study investigates the structural, optical, and photocatalytic properties of cadmium oxide (CdO) nanoparticles (NPs) indium–tin (ITO)-doped CdO NPs. The synthesis NPs ITO was accomplished through co-precipitation method. Scanning electron microscopy (SEM) analysis indicates that pure exhibit agglomerated structures, whereas doping introduces porosity roughness, thereby improving particle dispersion facilitating transport. Energy dispersive spectroscopy (EDS) corroborates successful incorporation tin (Sn) indium (In) within in addition to (Cd) oxygen (O). X-ray diffraction (XRD) demonstrates an increase results a reduction crystallite size, decreasing from 23.43 nm for 18.42 at 10% concentration, which can be attributed lattice distortion. Simultaneously, band gap exhibits narrowing 2.92 eV 2.52 eV, achieving optimal value before experiencing slight higher concentrations. tuneable improves light absorption, is crucial photocatalysis. degradation rhodamine B (RhB) highlights superior efficiency ITO-doped nanoparticles, remarkable 94.68% under sunlight 120 min, up 81.01%, significantly surpassing performance CdO. RhB concentration maximum determined 5 mg/L. enhanced catalytic activity effectiveness both UV visible light, showcasing their potential efficient pollutant sunlight-driven applications.

Language: Английский

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Study of Fe3O4 and Cu2+ doped modified Fe3O4 nano catalyst for photocatalytic degradation of methylene blue and eriochrome black-T dyes: Synthesis, characterization, and antimicrobial assessment

Inorganic Chemistry Communications, Journal Year: 2024, Volume and Issue: unknown, P. 113206 - 113206

Published: Sept. 1, 2024

Language: Английский

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Photocatalytic activity and anticancer properties of green synthesized ZnO-MgO-Mn2O3 nanocomposite via Ocimum basilicum L. seed extract

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Nov. 30, 2024

Green synthesis using plant extracts such as Ocimum basilicum L. (OBL) seed has attracted attention due to its sustainable and environmentally friendly nature. In this study, ZnO-MgO-Mn2O3 nanocomposites were synthesized OBL extract at two different calcination temperatures of 500 °C 600 °C, evaluated in terms photocatalytic application cytotoxicity. Phytochemicals seeds act reducing masking agents the production route, which leads formation nanomaterials with unique properties. Characterization techniques, including XRD, FE-SEM, DRS used analyze structural, morphological, optical features nanocomposite. XRD results confirmed increasing crystal size from ~ 32 nm (500 °C) 84 (600 °C). Also, FE-SEM images showed irregularly shaped EDX spectra samples presence zinc, magnesium, manganese, oxygen elements. The behavior nanocomposite cacined was investigated for organic pollutants. Removal percentages 97% Eriochrome Black T dye (pH = 10 90 min), 99% methylene blue 60 89% methyl orange 105 86.9% Rhodamine B 3 min) obtained. Moreover, cytotoxicity on 4T1 cell line investgate effect biological systems, IC50 value obtained around 323 µg/mL.

Language: Английский

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Syzygium aromaticum Bud Extracted Core–Shell Ag–Fe Bimetallic Nanoparticles: Phytotoxic, Antioxidant, Insecticidal, and Antibacterial Properties

Crystals, Journal Year: 2024, Volume and Issue: 14(6), P. 510 - 510

Published: May 27, 2024

Today, there is the roar of sustainable material development around globe. Green nanotechnology one extensions sustainability. Due to its approach, green fabrication nanoparticles has recently surpassed their classical synthesis in popularity. Among metal nanoparticles, contemporary findings have demonstrated that bimetallic possess more potential for different applications than monometallic due synergistic effects two metals. So, we are presenting facile, one-vessel, and one-step phyto-fabrication Ag–Fe BMNPs using bud extract Syzygiumaromaticum. The synthesized were characterized by UV-VIS, XRD, EDX, FTIR, SEM. NPs underwent biological studies. radical scavenging was found be 64% 73%, insecticidal 80% 100%, respectively. Similarly, both exhibited good antibacterial activity. zone inhibition 100 mg/mL 1 cm against all bacterial species, i.e., K. pneumonia, E. coli, S. aureus. It 1.5 cm, 1.3 aureus, respectively, showing activity higher NPs. this study unlocks eco-safe, cost-effective, least-harmful methodology with SA medical agricultural fields, a step towards

Language: Английский

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Heterojunction-Based Photocatalytic Degradation of Rose Bengal Dye via Gold-Decorated α-Fe2O3-CeO2 Nanocomposites under Visible-Light Irradiation

Water, Journal Year: 2024, Volume and Issue: 16(10), P. 1334 - 1334

Published: May 8, 2024

Developing photocatalytic nanomaterials with unique physical and chemical features using low-cost eco-friendly synthetic methods is highly desirable in wastewater treatment. In this work, the magnetically separable α-Fe2O3-CeO2 nanocomposite (NC), its respective metal oxides of α-Fe2O3 CeO2 nanoparticles, was synthesized a combination hexadecyltrimethylammonium bromide (CATB) ascorbic acid via hydrothermal method. To tune band gap, heterojunction decorated plasmonic Au nanoparticles (Au NPs). The various characterization methods, such as FTIR, UV-vis DRS, XRD, XPS, TEM, EDX, SEM, PL, were used to determine properties materials, including their morphology, elemental composition, optical properties, gap energy, crystalline phase. α-Fe2O3-CeO2@Au utilized remove Rose Bengal (RB) dye from technique when exposed visible light. A comprehensive investigation impact catalyst concentration initial conducted establish optimal photodegradation conditions. maximum efficiency (50 mg L−1) for RB (20 ppm) removal found be 88.9% 120 min under visible-light irradiation at neutral pH 7 30 °C. Various scavengers, benzoquinone (BQ; 0.5 mM), tert-butyl alcohol (TBA; ethylenediaminetetraacetic (EDTA; investigate effects different free radicals on process. Furthermore, reusability photocatalyst has also been explored. potential mechanism demonstrated that formed between CeO2, presence deposited NPs, led an enhanced by effectively separating photogenerated electron (e−)–hole (h+) pairs.

Language: Английский

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Controlling the Carbon Species to Design Effective Photocatalysts Based on Explosive Reactions for Purifying Water by Light

Catalysts, Journal Year: 2025, Volume and Issue: 15(1), P. 96 - 96

Published: Jan. 20, 2025

The international challenges of water directed the scientists to face environment-related problems because high concentrations industrial pollutants. In this direction, present study focuses on designing effective photocatalysts by explosive technique use light as a driving force for removing pollutants from water. These consist gold, carbon species (nanotubes, nanofibers, and nanoparticles), aluminum oxides. By controlling processes, two were prepared; one was based nanotubes nanofibers combined with oxide, other contained nanoparticles both Raman spectra, transmission electronic microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), mapping images confirmed presence these nanostructures in homogenous nanocomposites. optical properties prepared nanocomposites evaluated UV–Vis absorbance, band gap energy, photoluminescence (PL) measurements. experimental results indicated that CNTs CNFs led lowering energy nanocomposite 2.3 eV. This is suitable obtaining an photocatalyst. speculation through photocatalytic degradation green dyes. photocatalyst caused complete removal dyes after 21 min radiation. PL measurement have important roles accelerating A kinetic boosted efficiency accelerate reaction rate decomposition more than four times faster nanoparticles. Finally, concluded are favorable meet special requirements markets pollutant purification.

Language: Английский

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Regulating the H adsorption on supported RuO2 toward efficient Hydrogen evolution catalysis

Applied Catalysis A General, Journal Year: 2025, Volume and Issue: unknown, P. 120226 - 120226

Published: March 1, 2025

Language: Английский

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Fabrication of a Novel Silica–Alumina-Based Photocatalyst Incorporating Carbon Nanotubes and Nanofiber Nanostructures Using an Unconventional Technique for Light-Driven Water Purification

Catalysts, Journal Year: 2025, Volume and Issue: 15(5), P. 452 - 452

Published: May 6, 2025

The advancement of optical materials has garnered significant interest from the global scientific community in pursuit efficient photocatalysts for purification water using light. This challenge, which cannot be addressed traditional methods, is tackled present study utilizing unconventional approaches. presents fabrication an effective photocatalyst approach that employs explosive reactions. method successfully produces 3D nanostructures composed carbon nanotubes (CNTs), nanofibers (CNFs), and silica–alumina nanoparticles at temperatures below 270 °C. Gold-supported silica–alumina–CNT–CNF were synthesized characterized XRD, TEM, SEM, EDX, addition to mapping images. To determine photoactivity these produced nanostructures, two well-known photocatalysts—titanium dioxide zinc oxide—were nanoscale comparison. results showed presence CNTs CNFs significantly reduced band gap energy 5.5 eV 1.65 3.65 eV, respectively, after modifying structure. In addition, complete degradation green dye was achieved 35 min light exposure modified Additionally, surface properties had a positive role accelerating photocatalytic decomposition NGB. A kinetic confirmed functions as promising additive applications, NGB rate three times faster than prepared titanium six oxide.

Language: Английский

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