Degradation of Paracetamol in Distilled and Drinking Water via Ag/ZnO Photocatalysis under UV and Natural Sunlight

Water, Journal Year: 2023, Volume and Issue: 15(20), P. 3549 - 3549

Published: Oct. 11, 2023

The present study demonstrates the synthesis and application of Ag/ZnO powder films (thickness 4 μm) as photocatalysts for natural sunlight ultraviolet (UV, 315–400 nm) irradiation. procedure is simple eco-friendly, based on photo-fixation silver ions onto commercial ZnO via UV illumination first time. photocatalytic efficiency newly developed evaluated through degradation paracetamol in distilled drinking water. Our experimental evidences show that nanostructure are more active than pristine photodegradation process. Namely, modified with 10−2 M concentration achieve highest (D) percentages both types water (Ddistilled = 80.97%, Ddrinking 82.5%) under sunlight. Under exposure, slightly lower but still higher those achieved by pure 53.13%, 61.87%). It found activity grows direct proportion to Ag+ ions: < Ag 10−4/ZnO 10−3/ZnO 10−2/ZnO. Scanning electron microscopy, X-ray diffraction, photoelectron spectroscopy, UV–vis diffuse reflectance photoluminescence spectroscopy used characterize as-prepared nanostructures. improved performance mostly attributed combination excited transfer from inhibition photogenerated electron–hole pair recombination. Furthermore, can retain their after three cycles use, highlighting potential practical treatment pharmaceutical wastewater real-world scenarios where often readily available artificial light.

Language: Английский

---

Comparative study of degradation of pharmaceutical and personal care products in wastewater by advanced oxidation processes: Fenton, UV/H₂O₂, UV/TiO₂

CLEAN - Soil Air Water, Journal Year: 2024, Volume and Issue: 52(2)

Published: Jan. 9, 2024

Abstract In conventional wastewater treatment plants, micropollutants mix with the aquatic environment because they cannot be removed entirely due to their nonbiodegradable structure. Advanced oxidation processes can considered an alternative solution this problem. study, five different pharmaceutical and personal care products, carbamazepine, diclofenac, ibuprofen, paracetamol, triclosan, which are commonly found in environments, were selected as target pollutants. The removal of these pollutants was investigated using advanced methods such Fenton UV (UV, UV/H 2 O , UV/TiO ). feasibility terms cost investigated. both initial final concentrations measured liquid chromatography mass spectrometry/mass spectrometry accurately calculate efficiency. It has been determined that other than process have efficiency >99.9%. showed 40% for 90% 85% 86% paracetamol triclosan. Among high efficiency, integrated into plants shown most suitable system performance solving micropollutant

Language: Английский

---

Multifunctional characteristics of biosynthesized CoFe2O4@Ag nanocomposite by photocatalytic, antibacterial and cytotoxic applications

Chemosphere, Journal Year: 2023, Volume and Issue: 349, P. 140892 - 140892

Published: Dec. 7, 2023

Language: Английский

---

ZnO-Nd2O3 nanocomposites: Solution combustion synthesis, structural studies and UV assisted photocatalytic degradation of paracetamol

Journal of Crystal Growth, Journal Year: 2025, Volume and Issue: unknown, P. 128056 - 128056

Published: Jan. 1, 2025

Language: Английский

---

Cl-Doped ZnO Nanoparticles with Enhanced Photocatalytic Activity via Selective Surface Lixiviation: Implications for Acetaminophen Degradation

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 29, 2025

Language: Английский

---

Photocatalytic Disinfection of Selected Waterborne Pathogens by Visible Light-Active Nano Iron-Doped TiO₂ Obtained by a Sol–Gel Method

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 9, 2025

Bacterial contamination in drinking water systems poses a serious health risk due to poor hygiene, human activities, and cross-contamination within the supply. This study examines potential of iron-doped titanium oxide nanometric powder (Fe-TiO2) for photocatalytic disinfection Gram-negative E. coli Gram-positive S. aureus under visible light. The Fe-TiO2 photocatalyst, with an optimal nominal content 2.5 wt % Fe, was synthesized using surfactant-assisted sol-gel method, resulting mesoporous nanomaterial composed anatase nanoparticles specific surface area 123 m2/g. A sample undoped TiO2, obtained same method exhibiting 116 m2/g, utilized confirm role Fe-doping disinfection. nanopowders were characterized X-ray diffraction, N2 sorption at -196 °C, diffuse reflectance UV-vis spectroscopy, photoelectron electrophoretic mobility measurements, high-resolution transmission electron microscopy combined energy-dispersive field emission scanning microscopy. Photocatalytic tests conducted 1 0.5 g/L varying initial bacterial concentrations, yielding most promising results experimental conditions employed. After 240 min treatment Fe-TiO2, 99.9% removal both achieved starting from concentration × 106 CFU/mL. 99.8% 104 effective against high concentrations bacteria Reusability studied by recovering assessing their performance over three cycles. effectiveness light validated actual tap containing 167 CFU/mL total coliforms 8 . photocatalytically inactivated 30 min.

Language: Английский

---

Undoped and Fe-Doped Anatase/Brookite TiO2 Mixed Phases, Obtained by a Simple Template-Free Synthesis Method: Physico-Chemical Characterization and Photocatalytic Activity towards Simazine Degradation

Catalysts, Journal Year: 2023, Volume and Issue: 13(4), P. 667 - 667

Published: March 29, 2023

For the first time, Fe-doping (0.05, 1.0, and 2.5 wt.% Fe) was performed on a high-surface-area anatase/brookite TiO2 by adopting simple template-free sol-gel synthesis followed calcination at mild temperature. The powders’ textural surface properties were characterized following multi-technique approach. XRD analysis showed that ratio slightly varied in Fe-doped (from 76.9/23.1 to 79.3/22.7); Fe doping noticeably affected cell volume of brookite phase, which decreased, likely due Fe3+ ions occupying interstitial positions, retarded crystallite growth. N2 sorption −196 °C occurrence samples with disordered interparticle mesopores, an increase specific area from 236 m2 g−1 (undoped TiO2) 263 (2.5 Fe). Diffuse Reflectance UV-Vis spectroscopy progressive decrease bandgap energy 3.10 eV 2.85 XPS presence some species only Fe, accordingly, ζ-potential measurements small changes pH isoelectric point. photocatalytic degradation simazine (a persistent water contaminant) both under UV simulated solar light as probe reaction. Under light, improved sample 0.05 capable degrading ca. 77% simazine. Interestingly, undoped also active 1 SUN. This is heterojunctions, help stabilize photogenerated electrons/holes.

Language: Английский

---

Biosynthesis of ZnFe2O4@Ag hybrid nanocomposites for degradation of 2,4-Dichlorophenoxyacetic acid herbicide

Chemical Physics Impact, Journal Year: 2023, Volume and Issue: 7, P. 100282 - 100282

Published: Aug. 5, 2023

This work demonstrates recent advancements in the phytosynthetic and environmentally friendly method of preparing ZnFe2O4 ZnFe2O4@Ag hybrid nanocomposites using Pedalium murex L leaf extract as a stabilizing reducing agent. The synthesized nanocomposite was characterized with UV-vis, FTIR, TGA/DSC, XRD, FE-SEM, EDX to investigate electronic well morphological properties. Moreover, photocatalytic behavior evaluated breakdown 2,4-dichlorophenoxyacetic acid (2,4-DPA) by exposing UV-Vis light. results obtained suggest that exhibited activity for degradation 2,4-DPA approximately 94% 60 min compared ZnFe2O4. nanostructure significantly promoted charge transfer prevented electron hole recombination resulting enhancement activity. Furthermore, showed fair recyclable capacity up five catalytic cycles an acceptable percentage 2,4-DPA. findings this study identify efficient factor major contributor activity, promising possibilities design environmental remediation harmful contaminants.

Language: Английский

---

Electrochemical synthesis and modification of novel TiO2 nanotubes: Chemistry and role of key synthesis parameters for photocatalytic applications in energy and environment

Inorganic Chemistry Communications, Journal Year: 2024, Volume and Issue: 170, P. 113419 - 113419

Published: Nov. 4, 2024

Language: Английский

---

Photocatalytic performance with electrochemical effects for ZnO/Graphene Quantum Dots/CdSe nanocomposite toward ciprofloxacin antibiotics and paracetamol degradation under visible light

Materials Today Chemistry, Journal Year: 2024, Volume and Issue: 42, P. 102393 - 102393

Published: Nov. 10, 2024

Language: Английский

---