Efficient photocatalytic removal of drugs in aqueous dispersions by using different TiO2 based semiconductors under UV and simulated solar light irradiation

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-05-07 DOI:10.1016/j.jphotochem.2025.116465

Vittorio Loddo, Muhammad Umair, Tayyaba Kanwal, Leonardo Palmisano, Marianna Bellardita

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Abstract

Antibiotics are an important class of environmental pollutants. Due to their widespread use, low metabolism by organisms and persistence in the aquatic environment, they pose a serious risk to human health and environmental quality. The effective removal of pharmaceuticals and their metabolites from aqueous wastewater represents an audacious challenge for the scientific community. Heterogeneous photocatalysis has been applied as an effective technology for the removal of organic pollutants because it can induce their complete mineralization into CO₂, H₂O and inorganic species when heteroatoms are present in the degraded molecules without giving rise to the so-called secondary pollution. This study is addressed to enhance the efficiency of differently modified commercial and home-prepared TiO₂ based photocatalysts (heterojunctions with Cu₂O and WO₃, and samples doped with N were also prepared) towards some representative drugs (tetracycline, oxytetracycline and lincomycin). N-doped TiO₂ revealed high photocatalytic activity under both UV and simulated solar light irradiation, allowing not only the drugs removal but also a higher mineralization degree. O₂^•− radicals was found to be the main active species in the drugs degradation. Mechanistic investigations revealed a first order kinetics.

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不同TiO2基半导体在紫外光和模拟太阳光照下的高效光催化脱除水中药物

抗生素是一类重要的环境污染物。由于它们的广泛使用、生物代谢低下以及在水生环境中的持久性，对人类健康和环境质量构成严重威胁。从含水废水中有效去除药物及其代谢物对科学界来说是一项大胆的挑战。多相光催化是一种有效的去除有机污染物的技术，因为它可以在被降解分子中存在杂原子的情况下，诱导其完全矿化为CO2、H2O和无机物，而不会产生所谓的二次污染。本研究旨在提高不同改性的商业和自制TiO2基光催化剂（与Cu2O和WO3异质结，并制备了掺杂N的样品）对一些代表性药物（四环素，土霉素和林可霉素）的效率。n掺杂TiO2在紫外光和模拟太阳光照下均表现出较高的光催化活性，不仅可以脱除药物，而且具有较高的矿化度。O2•−自由基是药物降解的主要活性物质。力学研究揭示了一级动力学。

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来源期刊

Journal of Photochemistry and Photobiology A-chemistry 化学-物理化学

CiteScore

7.90

自引率

7.00%

发文量

580

审稿时长

48 days

期刊介绍： JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds. All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor). The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.