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<p>A&#xa0;two-stage synthesis of the Cu<sub>2</sub>O nanoparticles–clinoptilolite composite was carried out, which involved ultrasonic cavitation-intensified ion exchange of cations in the clinoptilolite framework for Cu<sup>2+</sup> ions from an aqueous solution of copper sulfate and reduction of Cu<sup>2+</sup> ions to Cu<sub>2</sub>O nanoparticles with hydrazine. In addition to the clinoptilolite peaks, the diffractogram of the synthesized material contained other peaks, which were mutually consistent with the cuprite (Cu<sub>2</sub>O) model with a&#xa0;cubic structure, and the average size of the Cu<sub>2</sub>O crystallite, calculated from the reflection assigned to the (111) plane, was approximately 13 nm. Pseudospherical Cu<sub>2</sub>O nanoparticles were uniformly distributed over the surface of the clinoptilolite framework, and the average size of Cu<sub>2</sub>O nanoparticles was approximately 61 nm. The Cu<sub>2</sub>O nanoparticles–clinoptilolite composite was tested as a&#xa0;catalyst for the potassium periodate decomposition during the Acid Red&#xa0;14 dye degradation in an ultrasonic cavitation field. A&#xa0;dye degradation degree of 96.9% was achieved within 30 min at a&#xa0;catalyst content in the reaction medium of 4 g/L. The scavenging method identified the singlet oxygen as the dominant reactive oxygen form, which played a&#xa0;key role in dye degradation.</p>

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Sonochemical synthesis and catalytic activity of the Cu2O nanoparticles-clinoptilolite composite

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • Yu. V. Sukhatskiy,
  • M. V. Shepida,
  • Z. O. Znak

摘要

A two-stage synthesis of the Cu2O nanoparticles–clinoptilolite composite was carried out, which involved ultrasonic cavitation-intensified ion exchange of cations in the clinoptilolite framework for Cu2+ ions from an aqueous solution of copper sulfate and reduction of Cu2+ ions to Cu2O nanoparticles with hydrazine. In addition to the clinoptilolite peaks, the diffractogram of the synthesized material contained other peaks, which were mutually consistent with the cuprite (Cu2O) model with a cubic structure, and the average size of the Cu2O crystallite, calculated from the reflection assigned to the (111) plane, was approximately 13 nm. Pseudospherical Cu2O nanoparticles were uniformly distributed over the surface of the clinoptilolite framework, and the average size of Cu2O nanoparticles was approximately 61 nm. The Cu2O nanoparticles–clinoptilolite composite was tested as a catalyst for the potassium periodate decomposition during the Acid Red 14 dye degradation in an ultrasonic cavitation field. A dye degradation degree of 96.9% was achieved within 30 min at a catalyst content in the reaction medium of 4 g/L. The scavenging method identified the singlet oxygen as the dominant reactive oxygen form, which played a key role in dye degradation.