Study of the Adsorption Properties of Mesoporous Silica Modified with Silver and Doped with Cerium or Terbium Using Inverse Gas Chromatography

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-07-01 DOI:10.3103/S1061386224700079

A. A. Tokranov, E. O. Tokranova, D. V. Ovchinnikova, R. V. Shafigulin, A. V. Bulanova, M. V. Kuznetsov, A. V. Safonov, O. V. Belousova

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Abstract

Samples of mesoporous silica gel doped with cerium and terbium and modified with silver were synthesized using the template method. The textural and morphological characteristics of the samples were studied using scanning electron microscopy, inductively coupled plasma mass spectrometry, X-ray diffraction analysis, Fourier-transform infrared (FT-IR) spectroscopy, and nitrogen adsorption-desorption analysis. Moreover, thermodynamic characteristics of adsorption (differential heats and entropies) of test organic compounds were obtained using the inverse gas chromatography method. It was established that the nature of the dopant leads to changes in the textural characteristics of the samples and the heat of adsorption for hydrocarbons and compounds prone to various types of specific interactions.

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利用反相气相色谱法研究银修饰和掺杂铈或铽的介孔二氧化硅的吸附特性

摘要采用模板法合成了掺杂铈和铽以及银修饰的介孔硅胶样品。利用扫描电子显微镜、电感耦合等离子体质谱、X 射线衍射分析、傅立叶变换红外光谱和氮吸附-解吸分析研究了样品的纹理和形态特征。此外，还利用反气相色谱法获得了测试有机化合物的吸附热力学特性（差热和熵）。结果表明，掺杂剂的性质会导致样品的纹理特征发生变化，并导致碳氢化合物和易发生各种特定相互作用的化合物的吸附热发生变化。

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来源期刊

International Journal of Self-Propagating High-Temperature Synthesis MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

1.00

自引率

33.30%

发文量

期刊介绍： International Journal of Self-Propagating High-Temperature Synthesis is an international journal covering a wide range of topics concerned with self-propagating high-temperature synthesis (SHS), the process for the production of advanced materials based on solid-state combustion utilizing internally generated chemical energy. Subjects range from the fundamentals of SHS processes, chemistry and technology of SHS products and advanced materials to problems concerned with related fields, such as the kinetics and thermodynamics of high-temperature chemical reactions, combustion theory, macroscopic kinetics of nonisothermic processes, etc. The journal is intended to provide a wide-ranging exchange of research results and a better understanding of developmental and innovative trends in SHS science and applications.