溶胶-凝胶法制备的Co3O4在可见光下氧化一氧化碳的光催化活性

IF 0.7 4区化学 Q4 CHEMISTRY, MULTIDISCIPLINARY

Theoretical and Experimental Chemistry Pub Date : 2025-03-31 DOI:10.1007/s11237-025-09826-y

M. L. Ovcharov, A. A. Bocharova, P. I. Glukhova, T. R. Stara

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引用次数: 0

摘要

采用溶胶-凝胶法制备了Co3O4，并对其形貌和光谱特性进行了表征。通过x射线衍射（XRD）和扫描电镜（SEM）等方法，确定了Co3O4晶粒尺寸为200 ~ 500 nm的多面体。结果表明，所制备的材料具有两个带隙值（1.4和2.35 eV），这可归因于钴离子在不同氧化态（Co2+和Co3+）下的存在。研究了该材料在CO氧化过程中的光催化性能。经过180分钟的辐照，一氧化碳的转化率超过60%。讨论了这一过程的可能机理。

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Photocatalytic Activity of Co3O4 Synthesized via Sol–Gel Method in the Oxidation of Carbon Monoxide Under Visible Light Irradiation

A Co₃O₄ was obtained using the sol–gel method, and its morphology and spectral characteristics have been examined. The presence of polyhedral Co₃O₄ particles with a size of 200-500 nm has been established by means of XRD and SEM methods. It is shown that the obtained material exhibits two values of band gap (1.4 and 2.35 eV), which can be attributed to the presence of cobalt ions in different oxidation states (Co²⁺ and Co³⁺). The photocatalytic properties of the material were studied in the process of CO oxidation. The carbon monoxide conversion is found to exceed 60 % after 180 min of irradiation. A possible mechanism of the process is discussed.

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来源期刊

Theoretical and Experimental Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

1.60

自引率

10.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Theoretical and Experimental Chemistry is a journal for the rapid publication of research communications and reviews on modern problems of physical chemistry such as: a) physicochemical bases, principles, and methods for creation of novel processes, compounds, and materials; b) physicochemical principles of chemical process control, influence of external physical forces on chemical reactions; c) physical nanochemistry, nanostructures and nanomaterials, functional nanomaterials, size-dependent properties of materials.