The beneficial effect of halloysite nanotubes as a matrix preventing the break of ordered mesoporous silica structure under microwave-assisted metal deposition

IF 5.3 2区地球科学 Q2 CHEMISTRY, PHYSICAL

Applied Clay Science Pub Date : 2024-12-27 DOI:10.1016/j.clay.2024.107686

Gleb Zasypalov , Anna Vutolkina , Aleksey Pimerzin , Vladimir Klimovsky , Egor Abramov , Aleksandr Glotov

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Abstract

The influence of microwave treatment on the structural characteristics of MCM-41 silica-based supports and properties of Ru-containing catalysts prepared thereon was investigated. The 800 W and 20 min mode of microwave treatment inevitably destroyed MCM-41 silica structure during the deposition of ruthenium particles. When moderate irradiation power to 400 W and duration time to 10 min, the destruction of the support was partially prevented, but the ruthenium loading reduces, simultaneously. To reinforce MCM-41 silica halloysite nanotubes (Hal) were introduced as a matrix for templated self-assembly of mesoporous silica, thereby forming ordered hierarchical MCM-41/Hal composite. The beneficial effect of Hal on the structural properties and stability of MCM-41 support under microwave-assisted Ru impregnation was demonstrated. MCM-41/Hal-supported catalysts revealed enhanced textural properties and characteristics of active component (high metal loading, narrow particle size distribution, high dispersion) compared to the analogous based on pure MCM-41. The catalytic properties were estimated in hydrogenation of multi-component aromatics-containing model feed, and Ru/MCM-41/Hal catalyst reveals 100 % benzene and ca. 89–90 % ethylbenzene and toluene conversion at the temperature range of 100–150°С for 3 h.

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来源期刊

Applied Clay Science 地学-矿物学

CiteScore

10.30

自引率

10.70%

发文量

289

审稿时长

39 days

期刊介绍： Applied Clay Science aims to be an international journal attracting high quality scientific papers on clays and clay minerals, including research papers, reviews, and technical notes. The journal covers typical subjects of Fundamental and Applied Clay Science such as: • Synthesis and purification • Structural, crystallographic and mineralogical properties of clays and clay minerals • Thermal properties of clays and clay minerals • Physico-chemical properties including i) surface and interface properties; ii) thermodynamic properties; iii) mechanical properties • Interaction with water, with polar and apolar molecules • Colloidal properties and rheology • Adsorption, Intercalation, Ionic exchange • Genesis and deposits of clay minerals • Geology and geochemistry of clays • Modification of clays and clay minerals properties by thermal and physical treatments • Modification by chemical treatments with organic and inorganic molecules(organoclays, pillared clays) • Modification by biological microorganisms. etc...