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<p>Water pollution by different organic substances remains one of the fundamental problems related to environmental safety. One of the most promising techniques for hazardous organic pollutants removal is heterogeneous photocatalysis using nanoparticles. In the present study heterophase ZnO/Zn<sub>2</sub>TiO<sub>4</sub> and TiO<sub>2</sub>/Zn<sub>2</sub>TiO<sub>4</sub> nanoparticles were fabricated for the first time by one-step electrical explosion of two twisted wires in oxygen-containing atmosphere. The prepared nanoparticles were characterized by UV–Vis spectroscopy, X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy<i>.</i> According to TEM analysis, the average sizes of ZnO/Zn<sub>2</sub>TiO<sub>4</sub> and TiO<sub>2</sub>/Zn<sub>2</sub>TiO<sub>4</sub> were 63 and 60&#xa0;nm, respectively. The band gap energies were 2.80 and 2.85&#xa0;eV for ZnO/Zn<sub>2</sub>TiO<sub>4</sub> and TiO<sub>2</sub>/Zn<sub>2</sub>TiO<sub>4</sub>&#xa0;nm, respectively (less than for ZnO and TiO<sub>2</sub>). Superior photocatalytic activity was observed for the ZnO/Zn<sub>2</sub>TiO<sub>4</sub> nanoparticles, achieving 92.5% degradation of methylene blue (MB) and 83.1% degradation of tetracycline hydrochloride under visible light irradiation after 60&#xa0;min. The photodegradation rate constants were 0.0392 and 0.0266&#xa0;min<sup>−1</sup> for MB and tetracycline hydrochloride, respectively. It was observed that superoxide and hydroxyl radicals play key roles in the degradation of tetracycline hydrochloride. Our results showed the applicability of zinc titanate-containing nanoparticles for the removal of emerging contaminants from aqueous media.</p>

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Electro explosive ZnO/Zn2TiO4 and TiO2/Zn2TiO4 nanoparticles for photocatalytic tetracycline hydrochloride degradation

  • 期刊论文

  • 发表日期：

    2026年4月10日

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  • Valeriya Chzhou,
  • Olga Bakina,
  • Natalia Svarovskaya,
  • Marat Lerner

摘要

Water pollution by different organic substances remains one of the fundamental problems related to environmental safety. One of the most promising techniques for hazardous organic pollutants removal is heterogeneous photocatalysis using nanoparticles. In the present study heterophase ZnO/Zn2TiO4 and TiO2/Zn2TiO4 nanoparticles were fabricated for the first time by one-step electrical explosion of two twisted wires in oxygen-containing atmosphere. The prepared nanoparticles were characterized by UV–Vis spectroscopy, X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. According to TEM analysis, the average sizes of ZnO/Zn2TiO4 and TiO2/Zn2TiO4 were 63 and 60 nm, respectively. The band gap energies were 2.80 and 2.85 eV for ZnO/Zn2TiO4 and TiO2/Zn2TiO4 nm, respectively (less than for ZnO and TiO2). Superior photocatalytic activity was observed for the ZnO/Zn2TiO4 nanoparticles, achieving 92.5% degradation of methylene blue (MB) and 83.1% degradation of tetracycline hydrochloride under visible light irradiation after 60 min. The photodegradation rate constants were 0.0392 and 0.0266 min−1 for MB and tetracycline hydrochloride, respectively. It was observed that superoxide and hydroxyl radicals play key roles in the degradation of tetracycline hydrochloride. Our results showed the applicability of zinc titanate-containing nanoparticles for the removal of emerging contaminants from aqueous media.