Synthesis and Characterization of a Novel Sol–Gel-Derived Ni-Doped TiO2 Photocatalyst for Rapid Visible Light-Driven Mineralization of Paracetamol DOI Creative Commons
Nicola Morante, Katia Monzillo, Vincenzo Vaiano

et al.

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(7), P. 530 - 530

Published: March 31, 2025

The increasing presence of pharmaceutical contaminants, such as paracetamol, in water sources necessitates the development efficient and sustainable treatment technologies. This study investigates photocatalytic degradation mineralization paracetamol under visible light using nickel-doped titanium dioxide (Ni–TiO2) catalysts synthesized via sol-gel method. were characterized through Raman spectroscopy, UV–Vis diffuse reflectance spectroscopy (UV–Vis DRS), surface area measurements. Ni doping enhanced absorption TiO2, reducing its band gap from 3.11 eV (undoped) to 2.49 at 0.20 wt.% loading, while analysis confirmed incorporation with anatase predominant phase. Ni(0.1%)-TiO2 catalyst exhibited highest activity, achieving 88% total organic carbon (TOC) removal (5 ppm) after 180 min optimal conditions (catalyst dosage, 3 g L−1). Stability tests demonstrated 84% retained efficiency over five cycles, a kinetic rate constant 0.010 min−1. Hydroxyl radicals identified main reactive species. maintained high performance tap water, 78.8% TOC removal. These findings highlight potential cost-effective, light-active photocatalyst for pollutants, promising scalability industrial applications.

Language: Английский

Intermediates of Hydrogen Peroxide-Assisted Photooxidation of Salicylic Acid: Their Degradation Rates and Ecotoxicological Assessment DOI Open Access
Alicja Gackowska, Waldemar Studziński, Alexander Shyichuk

et al.

International Journal of Molecular Sciences, Journal Year: 2025, Volume and Issue: 26(2), P. 697 - 697

Published: Jan. 15, 2025

Accelerated photooxidation of salicylic acid (SA) was performed using UV radiation and hydrogen peroxide. HPLC-MS analysis showed that the primary intermediates are 2,5-dihydroxybenzoic acid, 2,3-dihydroxybenzoic pyrocatechol, phenol. Deeper oxidation leads to low molecular weight aliphatic acids, such as maleic, fumaric, glyoxylic. The main carried out in same conditions. degradation SA its follows first-order reaction kinetics. In case irradiation alone, photodegradation is slightly faster (reaction rate constant 0.007 min−1) compared (0.0052 min−1). Other products degrade more slowly than SA. Hydrogen peroxide, concentrations 1.8–8.8 mM, accelerates intermediate products. An ecotoxicological evaluation EPI SuiteTM software. overall persistence (POV) long-range transport potential (LRTP) all transformation were assessed OECD POV LRTP screening tool. Salicylic have toxicity. Due their high solubility, these contaminants can travel considerable distances aquatic environment. phenol values 156–190 km. shorter (less 100 km).

Language: Английский

Citations

1
Synthesis and Characterization of a Novel Sol–Gel-Derived Ni-Doped TiO2 Photocatalyst for Rapid Visible Light-Driven Mineralization of Paracetamol DOI Creative Commons
Nicola Morante, Katia Monzillo, Vincenzo Vaiano

et al.

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(7), P. 530 - 530

Published: March 31, 2025

The increasing presence of pharmaceutical contaminants, such as paracetamol, in water sources necessitates the development efficient and sustainable treatment technologies. This study investigates photocatalytic degradation mineralization paracetamol under visible light using nickel-doped titanium dioxide (Ni–TiO2) catalysts synthesized via sol-gel method. were characterized through Raman spectroscopy, UV–Vis diffuse reflectance spectroscopy (UV–Vis DRS), surface area measurements. Ni doping enhanced absorption TiO2, reducing its band gap from 3.11 eV (undoped) to 2.49 at 0.20 wt.% loading, while analysis confirmed incorporation with anatase predominant phase. Ni(0.1%)-TiO2 catalyst exhibited highest activity, achieving 88% total organic carbon (TOC) removal (5 ppm) after 180 min optimal conditions (catalyst dosage, 3 g L−1). Stability tests demonstrated 84% retained efficiency over five cycles, a kinetic rate constant 0.010 min−1. Hydroxyl radicals identified main reactive species. maintained high performance tap water, 78.8% TOC removal. These findings highlight potential cost-effective, light-active photocatalyst for pollutants, promising scalability industrial applications.

Language: Английский

Citations

0