Photocatalytic Activity of SrTiO3 and BaTiO3 Nanostructures, Formed by the Sol-Gel Method, in the Process of Nitrogen Dioxide Decomposition

IF 0.7 4区 化学 Q4 CHEMISTRY, MULTIDISCIPLINARY Theoretical and Experimental Chemistry Pub Date : 2024-01-13 DOI:10.1007/s11237-024-09786-9
M. L. Ovcharov, P. I. Glukhova, A. M. Mishura, V. M. Granchak
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Abstract

Strontium and barium titanates with a perovskite structure have been obtained using a sol–gel method. It is shown that these materials are characterized by high values of a band gap (3.1 and 3.2 eV for SrTiO3 and BaTiO3, respectively). Morphological characteristics of the obtained titanates are considered, the presence of micrometer aggregates, consisting of nanosticks (diameter of 20-40 nm, length of 100-200 nm) and nanocrystals with size of 20-70 nm, is established. The photocatalytic properties of the samples in the process of NO2 decomposition to N2 and O2 under UV irradiation (λ = 365 nm) are studied, a possible mechanism of nitrogen dioxide conversion is discussed.

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溶胶-凝胶法形成的 SrTiO3 和 BaTiO3 纳米结构在二氧化氮分解过程中的光催化活性
利用溶胶-凝胶法获得了具有包晶结构的钛酸锶和钛酸钡。研究表明,这些材料的带隙值很高(SrTiO3 和 BaTiO3 分别为 3.1 和 3.2 eV)。研究还考虑了所获钛酸盐的形态特征,确定了由纳米棒(直径 20-40 纳米,长度 100-200 纳米)和大小为 20-70 纳米的纳米晶体组成的微米聚集体的存在。研究了样品在紫外线照射(λ = 365 纳米)下将二氧化氮分解为 N2 和 O2 过程中的光催化特性,并讨论了二氧化氮转化的可能机制。
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来源期刊
Theoretical and Experimental Chemistry
Theoretical and Experimental Chemistry CHEMISTRY, MULTIDISCIPLINARY-
CiteScore
1.60
自引率
10.00%
发文量
30
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.
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