Microwave–Assisted Synthesis of SiO2/ZnO Photocatalyst with Core-Shell Structure

IF 0.5 4区物理与天体物理 Q4 PHYSICS, MULTIDISCIPLINARY

Journal of Contemporary Physics (Armenian Academy of Sciences) Pub Date : 2024-03-07 DOI:10.1134/s1068337223040163

A. A. Sargsyan, R. A. Mnatsakanyan, T. V. Grigoryan, A. A. Kazaryan, A. A. Petrosyan, V. V. Harutyunyan, A. O. Badalyan, N. R. Aghamalyan, V. V. Baghramyan

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Abstract

The SiO₂/ZnO nanocomposite with a core-shell structure for photocatalysis from water-soluble zinc salts and sodium silicate was synthesized using the hydrothermal-microwave method. The physicochemical properties of the synthesized SiO₂/ZnO were studied and its photocatalytic activity was tested. The band gaps of the heat-treated composite \(E_{{\text{g}}}^{{{\text{dir}}}}\) and \(E_{{\text{g}}}^{{{\text{indir}}}}\) are 3.35 and 3.32 eV, respectively. The photocatalytic activity of the resulting SiO₂/ZnO was determined by the decomposition reaction of methylene blue under UV irradiation. The conversion of methylene blue was determined by optical method. The resulting SiO₂/ZnO has high photocatalytic activity. The conducted studies showed the effectiveness of microwave synthesis of SiO₂/ZnO with a core-shell structure in comparison with traditional methods.

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微波辅助合成具有核壳结构的 SiO2/ZnO 光催化剂

摘要以水溶性锌盐和硅酸钠为原料，采用水热-微波法合成了具有核壳结构的光催化用SiO2/ZnO纳米复合材料。研究了合成的 SiO2/ZnO 的理化性质，并测试了其光催化活性。热处理后复合材料的带隙\(E_{{text/{g}}}^{{text/{dir}}}}/)和\(E_{{text/{g}}^{{text/{indir}}}}/)分别为 3.35 和 3.32 eV。所得 SiO2/ZnO 的光催化活性是通过亚甲基蓝在紫外线照射下的分解反应来测定的。亚甲基蓝的转化率用光学方法测定。所得 SiO2/ZnO 具有很高的光催化活性。研究结果表明，与传统方法相比，微波合成核壳结构的 SiO2/ZnO 非常有效。

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来源期刊

Journal of Contemporary Physics (Armenian Academy of Sciences) PHYSICS, MULTIDISCIPLINARY-

CiteScore

1.00

自引率

66.70%

发文量

审稿时长

6-12 weeks

期刊介绍： Journal of Contemporary Physics (Armenian Academy of Sciences) is a journal that covers all fields of modern physics. It publishes significant contributions in such areas of theoretical and applied science as interaction of elementary particles at superhigh energies, elementary particle physics, charged particle interactions with matter, physics of semiconductors and semiconductor devices, physics of condensed matter, radiophysics and radioelectronics, optics and quantum electronics, quantum size effects, nanophysics, sensorics, and superconductivity.