Physical and Chemical Approaches of Photovoltaic Parameters in Dye-Sensitized Solar Cells to ZnO/ZnS:rGO-Based Photoelectrodes DOI Creative Commons

Thiago Kurz Pedra,

Ramon Dadalto Carvalho, Cristian Dias Fernandes

et al.

Applied Sciences, Journal Year: 2024, Volume and Issue: 15(1), P. 291 - 291

Published: Dec. 31, 2024

This study proposes an alternative process for obtaining ZnO/ZnS:rGO heterostructures use in DSSCs and as promising materials potential applications other photonic process, such photocatalysis photodetection. The compound was obtained through a microwave-assisted hydrothermal method, where the electromagnetic waves temperature were crucial points forming ZnO, ZnO/ZnS reducing graphene oxide (GO). XRD, Raman, FT-IR, FESEM results presented structural, morphological, chemical structures, which suggest conversion of ZnO to ZnS samples with higher concentrations reduced (rGO). Additionally, optical properties analyzed photoluminescence UV-Vis measurements. electrical behavior photoelectrodes investigated J-V measurements light dark conditions. In addition, electrochemical impedance spectroscopy (EIS) performed Bode phase plots created, analyzing recombination processes electron lifetime. showed that smaller amounts rGO, dye-sensitized solar cells (DSSC) efficiency improved compared single structure. However, it observed more significant photocurrent value decreased due presence charge-trapping centers. On hand, best ZnO/ZnS:1% rGO sample, increase 14.2% DSSC pure photoelectrode.

Language: Английский

Efficiency of Hydrogen Peroxide and Fenton Reagent for Polycyclic Aromatic Hydrocarbon Degradation in Contaminated Soil: Insights from Experimental and Predictive Modeling DOI Open Access

Mahdia Smara,

Razika Khalladi,

Nadji Moulai‐Mostefa

et al.

Processes, Journal Year: 2024, Volume and Issue: 12(3), P. 621 - 621

Published: March 21, 2024

This study investigates the degradation kinetics of polycyclic aromatic hydrocarbons (PAHs) in contaminated soil using hydrogen peroxide (H2O2) and Fenton process (H2O2/Fe2+). The effect oxidant concentration molar ratio on PAH decomposition efficiency is examined. Results reveal that increasing H2O2 above 25 mmol/samples leads to a slight increase rate constants for both first- second-order reactions. demonstrates higher compared alone, achieving yields ranging from 84.7% 99.9%. pH evolution during oxidation influences degradation, with alkaline conditions favoring lower elimination rates. Fourier-transform infrared (FTIR) spectroscopy analysis indicates significant PAHs after treatment, oxidants showing comparable efficacy complete hydrocarbon degradation. mechanisms by involve hydroxyl radical formation, latter exhibiting greater due Fe2+ catalysis. Gaussian regression (GPR) modeling accurately predicts reduced concentration, optimized ARD-Exponential kernel function demonstrating superior performance. Improved Grey Wolf Optimizer algorithm facilitates optimization reaction conditions, yielding high degree agreement between experimental predicted values. A MATLAB 2022b interface developed efficient prediction C/C0, critical parameter studies. integrated approach offers insights into optimizing oxidant-based remediation techniques, potential applications remediation.

Language: Английский

Citations

17
Green synthesis of ZnO nanoparticles using Justicia adhatoda for photocatalytic degradation of malachite green and reduction of 4-nitrophenol DOI Creative Commons

M. B. Mahajan,

Sanjeev Kumar, Jyoti Gaur

et al.

RSC Advances, Journal Year: 2025, Volume and Issue: 15(4), P. 2958 - 2980

Published: Jan. 1, 2025

Achieving the smallest crystallite/particle size of zinc oxide nanoparticles (ZnO NPs) reported to date, measuring 5.2/12.41 nm with Justicia adhatoda (J. adhatoda) leaf extract, this study introduces a facile green synthesis. Utilizing aqueous J. extract as both reducing and stabilizing agent, method leverages plant's rich phytochemical composition produce highly crystalline morphologically controlled ZnO NPs. This precise particle control highlights effectiveness synthesis process in morphological tuning. The synthesized NPs were thoroughly characterized using XRD, UV-vis spectroscopy, FTIR, FESEM, HRTEM, which collectively revealed superior crystallinity, morphology, unique surface properties conferred by bio-capping. photocatalytic performance these biogenic was evaluated for degradation two model pollutants: malachite (MG), synthetic dye, 4-nitrophenol (4-NP), toxic organic compound. exhibited exceptional efficiency, achieving 99.8% MG within 180 minutes demonstrating rapid reduction 4-NP 4-aminophenol reaction rate constant 0.245 min-1 under UV sunlight irradiation. Mechanistic studies attributed high reactive oxygen species (ROS) generation electron-hole pair interactions, supported improved charge separation area. work not only establishes potential adhatoda-mediated addressing persistent pollutants but also sets benchmark size-controlled By delivering scalable eco-friendly water remediation technologies, advances nanotechnology.

Language: Английский

Citations

4
Polyaniline-Modified Iron and Copper Co-Doped Cerium Oxide Nanocomposites for Enhanced Photocatalytic Degradation of methylene blue: Synthesis, and Characterization DOI

Kamilia Madi,

Fazia Agueniou,

Derradji Chebli

et al.

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2025, Volume and Issue: unknown, P. 136469 - 136469

Published: Feb. 1, 2025

Language: Английский

Citations

3
The Enhanced Adsorption Capacity of Ziziphus jujuba Stones Modified with Ortho-Phosphoric Acid for Organic Dye Removal: A Gaussian Process Regression Approach DOI Open Access

Abderraouf Guediri,

Abdallah Bouguettoucha, Hichem Tahraoui

et al.

Water, Journal Year: 2024, Volume and Issue: 16(9), P. 1208 - 1208

Published: April 24, 2024

Here, the chemical modification of Ziziphus jujuba stones (ZJS) treated with ortho-phosphoric acid (ZJS-H3PO4) is investigated to enhance its adsorption properties for organic dyes. The physicochemical ZJS-H3PO4 reveal increased porosity (87.29%), slightly higher bulk density (0.034 g mL−1), and enhanced acidity (31.42 m eq g−1) compared untreated ZJS. XRF analysis confirms successful incorporation orthophosphoric during treatment due a significant increase in phosphorus content. maximum capacity methylene blue on found be 179.83 mg g−1, demonstrating efficacy as potential adsorbent These findings suggest that modifying ZJS could promising strategy performance various environmental applications. Furthermore, Gaussian process regression (GPR) employed model MB by ZJS-H3PO4. Optimization GPR involves evaluating different kernel functions meticulously adjusting parameters maximize ability capture complex relationships data. obtained demonstrates remarkable high correlation coefficients (R) low root mean square errors (RMSEs) across all study phases. Model validation performed through residual analysis, confirming effectiveness accuracy predicting adsorption. Finally, user-friendly interface developed facilitate usage future applications, representing advancement modeling ecosystem management.

Language: Английский

Citations

11
Synthesis and photocatalytic performance of ZnS/rGO nanocomposites for methylene blue degradation DOI

Tofik Achalu Hussen,

Mulualem Abebe Mekonnen, Newayemedhin A. Tegegne

et al.

Applied Physics A, Journal Year: 2025, Volume and Issue: 131(2)

Published: Feb. 1, 2025

Language: Английский

Citations

1
Advanced green peel utilization for efficient methylene blue removal: Integrated analysis and predictive modeling DOI

Oumnia Rayane Benkouachi,

Abdallah Bouguettoucha, Hichem Tahraoui

et al.

Journal of Molecular Liquids, Journal Year: 2024, Volume and Issue: 413, P. 125951 - 125951

Published: Sept. 12, 2024

Language: Английский

Citations

5
From Green Chemistry to Healthy Environments: Silver Nanoparticles as a Dual Antioxidant and Antibacterial Agents for Advancing Biomedicine and Sustainable Wastewater Treatment DOI Creative Commons
Hamza Moussa, Sarah Hamid,

Amal Mameri

et al.

Bioengineering, Journal Year: 2024, Volume and Issue: 11(12), P. 1205 - 1205

Published: Nov. 28, 2024

The green synthesis of silver nanoparticles (AgNPs) using plant extracts is an eco-friendly method with potential for biomedical and environmental applications. This study aims to synthesize (SO-AgNPs) Salvia officinalis L. extract evaluate their antioxidant antibacterial properties, positioning them as candidates applications in sustainable biomedicine wastewater treatment. S. was used AgNPs under optimized conditions, a 10% extract/AgNO₃ ratio reaction time 180 min. SO-AgNPs were characterized ATR-FTIR, XRD, SEM, DLS, Zeta analysis. activity the evaluated ABTS+• DPPH• radical scavenging assays. Antibacterial tested against 11 bacterial strains bacteria isolated from industrial effluent, minimal inhibitory concentrations (MIC) determined both SO-AgNPs. demonstrated potent activity, IC₅₀ values 0.233 mg/mL 0.305 assay, 0.173 0.185 assay SO-AgNPs, respectively. testing showed MIC 0.25 between 3.12 6.25 E. coli, P. aeruginosa, A. baumannii, MRSA, B. cereus, epidermidis. For 0.125 0.5 extract. highlights dual capabilities demonstrating use applications, including

Language: Английский

Citations

5
Eco-friendly synthesis and characterization of ZnO and Mg-Ag-doped ZnO nanoparticles using Phoenix dactylifera L. seeds: exploring biological activity and structural properties DOI

Dalal Doudi,

Nasma Mahboub,

Noura Gheraissa

et al.

Biomass Conversion and Biorefinery, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 18, 2024

Language: Английский

Citations

4
Biosynthesis of ZnO NPs and ZnO$$\Vert $$CuO NC using Retama monosperma L. (Boiss) stems extract and their cationic dyes removal from wastewater under direct sunlight irradiation DOI
Soufiane Soltani, Amel Gacem

Biomass Conversion and Biorefinery, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 29, 2025

Language: Английский

Citations

0
Green Innovation: Multifunctional Zinc Oxide Nanoparticles Synthesized Using Quercus robur for Photocatalytic Performance, Environmental, and Antimicrobial Applications DOI Open Access

Selma Redjili,

Houria Ghodbane, Hichem Tahraoui

et al.

Catalysts, Journal Year: 2025, Volume and Issue: 15(3), P. 256 - 256

Published: March 7, 2025

This study investigates the green synthesis of zinc oxide nanoparticles (ZnO NPs) using leaf extract as a natural reducing agent, evaluating their antimicrobial and photocatalytic properties. The were annealed at 320 °C 500 °C, effects concentration annealing temperature on structural, morphological, electronic properties systematically explored. X-ray diffraction (XRD) analysis confirmed hexagonal wurtzite structure ZnO, with crystallite size defect density being influenced by extract. Scanning electron microscopy (SEM) revealed formation smaller, spherical particles, increased aggregation observed higher concentrations. Fourier-transform infrared spectroscopy (FTIR) identified key functional groups, such hydroxyl C–O bonds, metal–oxygen vibrations. UV–Vis showed reduction in band gap energy an increase Urbach increased. activity ZnO NPs was evaluated against Gram-positive Gram-negative bacteria well Candida albicans, demonstrating significant antibacterial efficacy. Photocatalytic degradation studies methylene blue dye superior efficiency up to 74% for samples, particularly °C. research highlights potential green-synthesized wide range applications, including agents, water purification, environmental catalysis. It contributes advancement sustainable nanotechnology, offering promising solutions both technological ecological challenges.

Language: Английский

Citations

0