Studying the Adsorption Properties of Mesoporous Silica Gels Doped with Terbium, Dysprosium, Lanthanum and Modified with Nickel Using the Reverse Gas Chromatography Method

IF 1.1 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

Protection of Metals and Physical Chemistry of Surfaces Pub Date : 2024-06-20 DOI:10.1134/S2070205124701442

A. A. Tokranov, E. O. Tokranova, R. V. Shafigulin, A. V. Bulanova

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Abstract

The adsorption properties of mesoporous silica gel synthesized by the template method, doped with terbium, dysprosium, lanthanum and modified with nickel (Tb-Ni/MS, Dy-Ni/MS, La-Ni/MS) were studied using gas chromatography. The textural characteristics of the obtained materials were studied by low-temperature nitrogen adsorption-desorption method, atomic emission spectroscopy (ICP), X-ray phase analysis (XPA), X-ray structural analysis (XRD), and scanning electron microscopy (SEM). Thermodynamic characteristics of adsorption (differential heats and entropies) of test organic compounds were obtained using the inverse gas chromatography method. It has been established that the nature of the dopant leads to changes in the heats of adsorption for compounds prone to various types of specific interactions. It has been shown that mesoporous silica gels doped with dysprosium, terbium and modified with nickel enhance dispersion interactions of linear hydrocarbons with the sorbent surface; the heat of adsorption of compounds prone to specific interactions is higher on mesoporous silica gel doped with lanthanum and modified with nickel.

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利用反向气相色谱法研究掺杂铽、镝、镧和镍改性的介孔二氧化硅凝胶的吸附特性

摘要利用气相色谱法研究了模板法合成的掺杂铽、镝、镧和镍改性的介孔硅胶（Tb-Ni/MS、Dy-Ni/MS、La-Ni/MS）的吸附性能。利用低温氮吸附-解吸法、原子发射光谱（ICP）、X 射线相分析（XPA）、X 射线结构分析（XRD）和扫描电子显微镜（SEM）研究了所得材料的质构特征。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）。研究证实，掺杂剂的性质会导致易发生各种特定相互作用的化合物的吸附热发生变化。研究表明，掺杂镝、铽和经镍改性的介孔硅胶可增强线性碳氢化合物与吸附剂表面的分散相互作用；掺杂镧和经镍改性的介孔硅胶对易产生特定相互作用的化合物的吸附热较高。

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来源期刊

Protection of Metals and Physical Chemistry of Surfaces 工程技术-冶金工程

CiteScore

1.90

自引率

18.20%

发文量

审稿时长

4-8 weeks

期刊介绍： Protection of Metals and Physical Chemistry of Surfaces is an international peer reviewed journal that publishes articles covering all aspects of the physical chemistry of materials and interfaces in various environments. The journal covers all related problems of modern physical chemistry and materials science, including: physicochemical processes at interfaces; adsorption phenomena; complexing from molecular and supramolecular structures at the interfaces to new substances, materials and coatings; nanoscale and nanostructured materials and coatings, composed and dispersed materials; physicochemical problems of corrosion, degradation and protection; investigation methods for surface and interface systems, processes, structures, materials and coatings. No principe restrictions exist related systems, types of processes, methods of control and study. The journal welcomes conceptual, theoretical, experimental, methodological, instrumental, environmental, and all other possible studies.