Microporous and Mesoporous Materials最新文献

{"title":"Controlling the heterogeneous catalysis of zirconium clusters within a porous SBA-15 scaffold","authors":"Ann M. Kulisiewicz ,&nbsp;Sergio J. Garibay ,&nbsp;Trenton B. Tovar ,&nbsp;Matthew A. Browe ,&nbsp;Jill B. Harland ,&nbsp;Jason K. Navin","doi":"10.1016/j.micromeso.2024.113398","DOIUrl":"10.1016/j.micromeso.2024.113398","url":null,"abstract":"<div><div>Metal-organic frameworks (MOFs) with Zr-based secondary building units (SBUs) have shown promise as materials for the catalytic degradation of chemical warfare agents (CWAs). The Zr-based SBU within the MOF has been previously determined to be the active site for catalytic hydrolysis reactions within these materials. However, MOF structure dictates access to the SBU active sites with microporous MOFs showing catalysis solely on the surface of the particles of the MOF and MOFs with analogous SBUs exhibiting different reaction rates under the same reaction conditions. The multitude of variables inherent to MOF structures (e.g. pore size, pore structure, connectivity, crystal size, functional groups, defects, and monocarboxylic acid modulators (MCAMs) used in synthesis) complicate the fundamental understanding of the SBU's reactivity in the hydrolysis reaction independent of topological constraints. In this work, we have explored the catalytic activity of a simplified SBU system consisting of Zr₆ and Zr₁₂ clusters decorated with MCAMs varying in size and functionality to simulate the chemical environment of the SBU within the MOF structure. The zirconium clusters were then supported on mesoporous silica (SBA-15) functionalized with either sulfuric or phosphoric acid groups that bind to the zirconium nodes, covalently tethering the clusters to the silica support. These novel porous materials were designed to mimic the porous nature of the MOF structure to determine the effect on hydrolysis reactivity. The final silica-bound zirconium clusters showed enhanced reactivity towards the hydrolysis of dimethyl nitrophosphate (DMNP), a nerve agent simulant, under buffered conditions compared to the bare Zr clusters and showed key differences in the catalytic activity based on the chemical environment imparted by both the MCAM and the modified support. In addition, the use of an acid-modified silica scaffolding allowed for the incorporation of adjacent amine moieties on the SBA-15 support to facilitate hydrolysis of DMNP under neutral aqueous conditions, a benefit over typical Zr-based <span>MOF</span> catalysts that require a buffer for appreciable reactivity.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"382 ","pages":"Article 113398"},"PeriodicalIF":4.8,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cluster adsorption of L-histidine on carbon nanotubes at different temperatures","authors":"E.V. Butyrskaya ,&nbsp;T.V. Eliseeva ,&nbsp;D.T. Le","doi":"10.1016/j.micromeso.2024.113405","DOIUrl":"10.1016/j.micromeso.2024.113405","url":null,"abstract":"<div><div>The adsorption isotherms of L-histidine on MKN-SWCNT-S1 CNTs from aqueous solution at temperatures of 25, 35, 45, 55, 65 and 80 °C were interpreted within the framework of the single-layer cluster adsorption model. A new approach to determine the equilibrium parameters of the cluster adsorption isotherm equation and sorbate structure on CNTs, as well as a nonlinear modelling method, was applied. To confirm the cluster nature of amino acid adsorption on CNTs, the clustering criterion proposed in the previous work was applied, and the cluster structure was evaluated, which is significant for the application of CNTs in biomedicine. The found equilibrium parameters of adsorption were applied to the determination of thermodynamic characteristics of adsorption (changes in Gibbs energy, enthalpy and entropy) of L-histidine on CNTs and the character of adsorption was analysed.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"383 ","pages":"Article 113405"},"PeriodicalIF":4.8,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of three distinctive crosslinking agents on the dielectric properties of as-prepared polyimide aerogels prepared from super-critical fluid technique","authors":"Ming-Jaan Ho ,&nbsp;Kuan-Ying Chen ,&nbsp;Minsi Yan ,&nbsp;Yun-Ting Chen ,&nbsp;Wei-Syuan Jhuang ,&nbsp;Ho-Hsiu Chou ,&nbsp;Jui-Ming Yeh","doi":"10.1016/j.micromeso.2024.113406","DOIUrl":"10.1016/j.micromeso.2024.113406","url":null,"abstract":"<div><div>In this study, the impact of three distinct cross-linking agents—1,3,5-benzene tricarbonyl trichloride (BTC), tris(4-aminophenyl)amine (TAPA), and 3-aminopropyltrimethoxysilane (APTMS)—on the dielectric and thermal properties of polyimide aerogels was investigated. Poly(amic acid) (PAA) was synthesized by reacting diamine ODA with dianhydride BPDA in NMP, followed by cross-linker introduction in acetic anhydride and pyridine. The analysis reveals that BTC and TAPA, both organic cross-linkers with varying aromatic content, influence the dielectric properties differently. APTMS, an organosilane, introduces inorganic siloxane linkages, enhancing the thermal stability of the aerogels.</div><div>Key findings include that BTC-crosslinked aerogels achieved the lowest dielectric constant, 1.215, and dielectric loss, 0.025, making them particularly effective for high-frequency applications. In contrast, TAPA and APTMS-crosslinked aerogels displayed higher dielectric constants and losses. Differential Scanning Calorimetry (DSC) revealed that PI-APTMS exhibited the highest glass transition temperature (T_g), followed closely by PI-TAPA, both significantly higher than the non-crosslinked polyimide aerogel (NAPI), indicating excellent thermal properties. The melting points (T_m) of PI-APTMS and PI-BTC were similar, around 294 °C, attributed to the density of structural stacking. At the same time, PI-TAPA exhibited a lower T_m, likely due to its superior network structure.</div><div>Thermogravimetric analysis (TGA) further indicated that PI-TAPA had the highest thermal decomposition temperature (T_5d), with all aerogels remaining stable above 420 °C. These results underscore the potential of BTC-crosslinked polyimide aerogels for applications requiring minimal dielectric loss and low constants. We also highlight the influence of organic versus inorganic cross-linkers on thermal and dielectric performance, advancing the field of high-speed communication materials.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"383 ","pages":"Article 113406"},"PeriodicalIF":4.8,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of nanoporous carbon models with tunable pore structures via the random packing-virtual atom method","authors":"Yihuan Zhou,&nbsp;Qiang Xie,&nbsp;Dingcheng Liang,&nbsp;Hongyang Zhou,&nbsp;Jinchang Liu,&nbsp;Yutong Sha,&nbsp;Bingjie Wang,&nbsp;Shimei Gu","doi":"10.1016/j.micromeso.2024.113407","DOIUrl":"10.1016/j.micromeso.2024.113407","url":null,"abstract":"<div><div>Nanoporous carbon (NPC) is widely utilized due to its highly developed pore structure. The complex structure-property relationships of NPC necessitate simulation methods to complement experimental approaches, with structural model construction serving as the foundation. Regulating pore structures during construction of NPC models poses a significant challenge, and existing strategies for introducing pores have inherent limitations. In this work, NPC models were constructed using the random packing method, incorporating virtual atoms (VAs) to regulate pore development, achieving targeted control over the pore structure. The results indicate that the system density is a critical factor in determining the porosity range of NPC models, whereas VAs provide an effective means to regulate pore characteristics. By adjusting the number and radius of VAs, the pore characteristics of the models can be tuned, although their effects on different features vary. The number of VAs significantly influences SSA, which increases with the number of VAs, whereas VA radius predominantly affects porosity, increasing as the radius expands. Furthermore, the NPC-SDG-AC model was developed with an SSA of 968 m²/g and a pore size distribution consistent with actual microporous distribution. NPC-1, NPC-2, and NPC-3 models were also constructed, exhibiting mesoporous, large microporous, and small microporous characteristics.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"382 ","pages":"Article 113407"},"PeriodicalIF":4.8,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced selective extraction of biogenic amines using carboxyl-functionalized SBA-15 and SBA-16 mesoporous silica","authors":"Wuyue Yu ,&nbsp;Hangzhen Lan ,&nbsp;Zhen Wu ,&nbsp;Daodong Pan ,&nbsp;Yichun Wu","doi":"10.1016/j.micromeso.2024.113404","DOIUrl":"10.1016/j.micromeso.2024.113404","url":null,"abstract":"<div><div>This study investigates the adsorption behavior of biogenic amines (BAs) using mesoporous silica materials, specifically SBA-15 and SBA-16, as well as their carboxyl-functionalized derivatives (SBA-15-C and SBA-16-C). The materials were synthesized and characterized using Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray powder diffraction, and nitrogen adsorption-desorption analyses, confirming successful functionalization and the preservation of mesoporous structures. Adsorption kinetics and isotherms were evaluated to assess the efficiency and capacity of these materials in adsorbing phenylethylamine and tryptamine. The results demonstrated that carboxylation, despite reducing pore size and surface area, significantly enhanced the adsorption capacity. SBA-15-C exhibited the highest adsorption capacity, with a maximum of 129.9 mg g⁻¹, surpassing other recently reported adsorbents. The primary adsorption mechanisms were identified as hydrogen bonding and N-H bond interactions between the -NH₂ groups of BAs and the -OH or -COOH groups on the SBA surfaces. Additional mechanisms, including ion-dipole interactions and size exclusion effects, also contributed to the adsorption process. The improved performance of carboxylated SBA materials is attributed to their increased negative surface charge, which enhances their affinity for positively charged BAs. Additionally, density functional theory calculations and molecular docking simulations were employed to further investigate the interaction mechanisms between the adsorbents and BAs, confirming the significance of electrostatic interactions and hydrogen bonding at specific binding sites. These findings suggest that carboxylated SBA-15 is highly effective for the selective extraction of BAs from complex matrices, offering potential for practical applications in food safety.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"382 ","pages":"Article 113404"},"PeriodicalIF":4.8,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of cubic mesoporous silica SBA16 functionalized with carboxylic acid in a one-pot process for efficient removal of wastewater containing Cu2+: Adsorption isotherms, kinetics, and thermodynamics","authors":"Chunlai Liu,&nbsp;Wei Wang,&nbsp;Na Wang,&nbsp;Zelong Liu,&nbsp;Peihang Shen,&nbsp;Jianglei Hu,&nbsp;Fengwei Shi","doi":"10.1016/j.micromeso.2024.113402","DOIUrl":"10.1016/j.micromeso.2024.113402","url":null,"abstract":"<div><div>Wastewater containing heavy metal ions, such as Cu²⁺, that are released into the environment will cause irreparable damage to the nature and human health of living. It is, therefore, absolutely crucial to remove these toxic ions from water. Herein, this paper utilizes the cyano group as a functional reagent to prepare carboxyl-functionalized SBA16 for adsorbing Cu²⁺ in water. In this paper, 2-cyanoethyltriethoxysilane is employed as a functionalizing reagent to prepare carboxyl-functionalized SBA16 through a one-pot method. The prepared material was characterized using various techniques, such as WXRD, TEM, FT-IR, and XPS. The results indicated that the introduction of the functionalizing reagent did not disrupt the original cage-like cubic mesoporous structure (Im3m symmetry) of SBA16. Crucial adsorption factors, namely pH, adsorbent dosage, Cu²⁺ initial concentration, and contact time, affecting the removal of Cu²⁺ were monitored and the optimum adsorption conditions were determined. Isotherm and kinetic investigations were conducted and a non-linear fitting method of experimental data was used to obtain isotherm and kinetic parameters. Maximum adsorption capacity reaches 181.3 mg g⁻¹ was achieved in 60 min at pH = 3. Adsorption kinetics and adsorption isotherm followed the pseudo-second-order (R² = 0.999) and Langmuir (R² = 0.999) models, respectively. This suggests that the adsorption process primarily involves chemisorption and monolayer coverage. Thermodynamic parameters showed the spontaneous and endothermic nature of the adsorption process. After 5 cycles, the adsorbent still maintains a good adsorption capacity for Cu²⁺. This suggests promising applications for the adsorbent in treating wastewater containing Cu²⁺.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"382 ","pages":"Article 113402"},"PeriodicalIF":4.8,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced photo-assisted thermal catalytic oxidation of formaldehyde via abundant surface adsorbed oxygen in Co3O4 with the assistance of natural zeolite","authors":"Shixuan Wang ,&nbsp;Fang Yuan ,&nbsp;Jialin Liang ,&nbsp;Lin Peng ,&nbsp;Chunquan Li ,&nbsp;Qing Sun ,&nbsp;Zhiming Sun","doi":"10.1016/j.micromeso.2024.113401","DOIUrl":"10.1016/j.micromeso.2024.113401","url":null,"abstract":"<div><div>Photo-assisted catalytic oxidation is a promising and sustainable method for the formaldehyde (HCHO) degradation. Catalyst loading and surface adsorbed oxygen species are common strategies to enhance the efficiency of photo-assisted catalytic oxidation. In this work, acid-treated zeolite-based natural zeolites (mordenite and stellerite) were used as supports, to obtain Co₃O₄-natural zeolite composites by impregnation and MOF-templated methods. Under the combined action of visible light irradiation and heat condition, the photo-assisted thermal catalytic performance of different composites was determined. Among these composites, the Co-AS (Co₃O₄-acid-treated stellerite) composite exhibited the best HCHO mineralization performance. The use of acid-treated stellerite as a catalyst carrier effectively reduced the crystallite size of Co₃O₄, improved its dispersibility, and increased the surface adsorbed oxygen species, contributing to enhanced catalytic efficiency. The in-situ DRIFTs results showed that the main intermediates of photo-assisted thermal catalysis degradation were dioxymethylene (DOM) and HCOO⁻. Additionally, the reusability performance of the composites was also investigated. Experimental results showed that the composite had good photo-assisted thermal catalytic performance and durability, making it a promising catalyst for indoor air purification.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"382 ","pages":"Article 113401"},"PeriodicalIF":4.8,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MAPO-5 molecular sieves from alkylimidazolium bromide ionic liquids","authors":"Susan C. Citrak ,&nbsp;Beatriz Ehlke ,&nbsp;Stacey I. Zones ,&nbsp;Dan Xie ,&nbsp;Son-Jong Hwang ,&nbsp;Andrew S. Ichimura ,&nbsp;Linjuan Zhang ,&nbsp;Shibo Xi ,&nbsp;Scott R.J. Oliver","doi":"10.1016/j.micromeso.2024.113400","DOIUrl":"10.1016/j.micromeso.2024.113400","url":null,"abstract":"<div><div>The ionic liquids diisopropylimidazolium bromide (DIPI) and diisobutylimidazolium bromide (DIBU) were used both as solvents and structure-directing agents (SDAs) to obtain AlPO₄-5 and MnAPO-5 (Mn-AFI) molecular sieves. For increasing level of manganese, DIBU always yielded pure-phase Mn-AFI whereas DIPI led to amorphous product when more than 0.13 eq of Mn was added. Varying amounts of water, HF and metal led to AFI, cristobalite or tridymite phases. We also explored the use of nickel as the metal dopant, and although AFI phase were obtained under certain conditions, no framework incorporation of the metal was observed. Because of the vanishingly low vapor pressure of the ILs, the synthesis does not carry the risk of pressure build-up. The ILs were easily and fully recyclable and used for multiple syntheses. The MnAPO-5 material was characterized with powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), electron paramagnetic resonance (EPR), multinuclear solid-state nuclear magnetic resonance (SS-NMR) and X-ray absorption fine structure (XAFS). These findings provide new insight into the ionothermal synthesis of metal-doped AFI frameworks with possible implications in catalytic applications.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"382 ","pages":"Article 113400"},"PeriodicalIF":4.8,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Alkali and alkaline earth ion exchange affinity in ETS-10 toward aqueous lithium separation","authors":"Winters Kexi Guo,&nbsp;Derek R. Zhu,&nbsp;Grant Zeszutek,&nbsp;Emma Rosko,&nbsp;Michael J. Janik,&nbsp;Gina Noh","doi":"10.1016/j.micromeso.2024.113403","DOIUrl":"10.1016/j.micromeso.2024.113403","url":null,"abstract":"<div><div>Continuous ion exchange is a more sustainable alternative to current methods for removing common impurities from lithium sources. In this work, we examine ion-adsorbent interactions for Mg²⁺ and Ca²⁺ with microporous titanosilicate ETS-10, an ion exchange solid with promising performance, using experimental and computational (density functional theory, DFT) methods. Ion exchange affinity for Mg²⁺ and Ca²⁺ using the Na⁺-form of ETS-10 are quantified from measured equilibrium isotherms, analyzed using a modified Langmuir isotherm accounting for overall stoichiometric desorption/adsorption in the cation exchange process. The equilibrium constant for ion exchange using Na-ETS-10 is greatest for Ca and decreases in order of Mg, K, and Li, respectively. These differences in ion exchange affinity are consistent with trends in DFT-derived ion exchange energies, which account for hydration and solvation of cations using a thermochemical cycle. These equilibrium constant values and ion exchange energies suggest that exchange of Ca²⁺, Mg²⁺, and K⁺ using Na-ETS-10 is more favorable than that of Li⁺. Indeed, competitive ion exchange of equimolar aqueous mixtures of Li⁺ and each of K⁺, Mg²⁺, or Ca²⁺ demonstrate selective uptake of the non-lithium cation into the solid, thereby concentrating Li⁺ in the aqueous solution while removing impurity cations.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"383 ","pages":"Article 113403"},"PeriodicalIF":4.8,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of hierarchical porous silica aerogel for CO2 adsorption using decarbonized coal gasification fine slag","authors":"Ying Gao ,&nbsp;Jiafeng Zhang ,&nbsp;Yanan Tu ,&nbsp;Weidong Wang ,&nbsp;Ziqi Zhu ,&nbsp;Zhiqiang Xu","doi":"10.1016/j.micromeso.2024.113399","DOIUrl":"10.1016/j.micromeso.2024.113399","url":null,"abstract":"<div><div>The preparation of hierarchical porous silica aerogels from coal gasification fine slag (CGFS) offers an effective approach to achieving high-value utilization of solid waste and reducing the production cost of solid adsorbent matrix materials. However, the main challenges involve overcoming technical barriers to efficiently and value-added conversion of CGFS into silica aerogels with CO₂ adsorption properties, as well as elucidating the phase transformation mechanisms during the synthesis process. In this study, CGFS was used as the raw material to obtain a silicon-containing precursor through pre-decarbonization (with ash content as high as 99.82 %) and alkali dissolution treatment. A hierarchical porous silica aerogel was then synthesized using an efficient hydrothermal process. The effect of alkali dissolution on silicon extraction and the phase transformation mechanisms were thoroughly discussed, and the leaching mechanism was analyzed through thermodynamic and kinetic models. The results showed that the high leaching rate of silicon was attributed to the presence of a large amount of amorphous SiO₂ in the decarbonized fine slag (DCFS), while the formation of zeolite Na-P1 and hydroxysodalite during the alkali dissolution process affected the efficiency of silicon extraction. Then, the structural formation mechanism and CO₂ adsorption properties of the hierarchical porous silica aerogels were analyzed using N₂ adsorption-desorption and CO₂-TPD. The SiO₂-1-30-0.5 exhibited a high CO₂ adsorption ability of 1.53 mmol g⁻¹, and the CO₂ adsorption capacity maintained 94.78 % of the original value and after 5 adsorption-desorption cycles.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"382 ","pages":"Article 113399"},"PeriodicalIF":4.8,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142586329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}