Microporous and Mesoporous Materials最新文献

{"title":"NiPt/SAPO-11 catalysts for hydrodeoxygenation of anisole to cyclohexane: effect of the support's Si/al molar ratio on catalytic performance","authors":"Alejandro Suárez-Méndez ,&nbsp;Fernanda Castelán-González ,&nbsp;Rubén Mendoza-Cruz ,&nbsp;Lázaro Huerta ,&nbsp;Jonas S. Albuquerque ,&nbsp;Gustavo A. Fuentes ,&nbsp;Tatiana E. Klimova","doi":"10.1016/j.micromeso.2025.113992","DOIUrl":"10.1016/j.micromeso.2025.113992","url":null,"abstract":"<div><div>NiPt catalysts supported on SAPO-11 zeolite were synthesized with the aim to inquire into the influence of the support's Si/Al molar ratio (0.075–0.60) on the activity and selectivity of the catalysts in the hydrodeoxygenation of anisole. An increase in Si content led to a reduction in the crystallinity of SAPO-11, attributed to the higher number of SiO₂ islands (extra-framework silica species). Acidity of supports and catalysts passed through the maximum at a Si/Al molar ratio of 0.15 and then decreased with further increase in Si/Al ratio. All the NiPt/SAPO-11 catalysts demonstrated high activity in the hydrodeoxygenation of anisole in a batch reactor at 250 °C and 6.8 MPa of H₂ pressure, achieving conversions of 96–98 % at 6 h reaction time. The best activity results were obtained with the NiPt/SAPO-11 catalysts with Si/Al molar ratios in the supports between 0.30 and 0.60. Supports with lower Si/Al molar ratios (0.075 and 0.15) resulted in lower activity, which was attributed to an increase in the fraction of NiAl₂O₄ with Ni²⁺ species non-reducible upon the activation conditions used (400 °C, 4 h). Regarding selectivity to cyclohexane, catalysts with intermediate Si/Al ratios (0.15–0.45) exhibited higher selectivity (∼94–96 %) than other catalysts, attributed to their elevated acidity as measured by temperature-programmed desorption of ammonia. Finally, the experimental data were fitted to a kinetic model that considered the hydrogenation-deoxygenation pathway, correlating the kinetic constants with the metal-acid characteristics of the catalysts, namely, the amount of reduced Ni and total amount of acid sites.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113992"},"PeriodicalIF":4.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145734085","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":"The influence of C-F- and C-H-bonds on the adsorption of propane and perfluoropropane on FAU-type zeolites","authors":"Malte Menk ,&nbsp;Christian Bläker ,&nbsp;Christoph Pasel ,&nbsp;Dieter Bathen","doi":"10.1016/j.micromeso.2025.113988","DOIUrl":"10.1016/j.micromeso.2025.113988","url":null,"abstract":"<div><div>This study aims to investigate the influence of carbon-fluorine- and carbon-hydrogen-bonds on adsorption. Therefore, we performed comparative experiments with perfluoropropane (C₃F₈) and propane (C₃H₈) on FAU-type zeolites (NaX and CaNaX) over a temperature range of −20 to 25 °C. Breakthrough curves measured by FTIR are used to obtain both pure component and mixture isotherms. Additionally, mixture isotherms were predicted using the Ideal Adsorbed Solution Theory (IAST). While in pure component adsorption at low relative pressure on NaX the loading of C₃F₈ achieves higher values than the loading of C₃H₈ the loadings of C₃F₈ and C₃H₈ on CaNaX are similar. Obviously, propane benefits from ion exchange (from sodium to calcium) which increases propane interactions while perfluoropropane interaction are not significantly affected due to its bulkier structure. Due to its larger molecular dimensions C₃F₈ has lower saturation capacities. Electrostatic and steric effects are combined in mixed adsorption. Mixture data show that C₃H₈ displaces C₃F₈ more strongly, especially on zeolite NaX, as the degree of coverage increases and the temperature decreases. IAST predictions qualitatively reflect the experimental data but partly show significant deviations. These can be attributed to inaccuracies in fitting pure component isotherms and to non-idealities. The largest deviations between IAST predictions and experimental data occur at low relative pressure of the respective component, likely due to the lack of experimental data in particular in the low-pressure region, the limited representation of molecular size effects, interaction-specific effects and the lack of consideration for the energetic heterogeneity of the adsorption sites. The results of this study provide mechanistic insights into the role of C-F and C-H functionalities in influencing selectivity and capacity in competitive adsorption and support the development of selective separation processes for fluorinated hydrocarbons.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113988"},"PeriodicalIF":4.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145734086","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":"The room-temperature and rapid synthesis of nitrogen-rich metal organic framework for effectively catalyzing the CO2 cycloaddition with epoxides","authors":"Jianwen Lan ,&nbsp;Shuang Liu ,&nbsp;Jiayang Zhang,&nbsp;Yang Cheng,&nbsp;Xu Yang","doi":"10.1016/j.micromeso.2025.113982","DOIUrl":"10.1016/j.micromeso.2025.113982","url":null,"abstract":"<div><div>A nitrogen-enriched Zn-based metal-organic framework Zn-MA-Htdc-RT was facilely synthesized via a room-temperature method, wherein easily removable ammonium hydroxide served as the deprotonating agent. Compared with the conventional solvothermal method and other widely adopted room-temperature synthesis strategies, this approach remarkably shortened the preparation cycle to 2 h, featuring prominent advantages of energy efficiency and environmental benignity. Endowed with amine groups (Lewis base sites) and Zn metal centers (Lewis acid sites), Zn-MA-Htdc-RT exhibited excellent catalytic performance in the cycloaddition reaction of CO₂ with epoxides. Under mild and solvent-free conditions (60 °C, 1.0 MPa CO₂, 6 h), the yield of propylene carbonate (PC) reached up to 99 % with full conversion. Notably, even at room temperature, an impressive PC yield of 87 % could be achieved by extending the reaction time to 24 h. Furthermore, Zn-MA-Htdc-RT demonstrated satisfactory reusability and broad applicability towards various epoxide substrates. Collectively, this green, rapid, and room-temperature synthetic route for the high-performance nitrogen-rich Zn-MA-Htdc-RT provides a competitive alternative for the capture and utilization of CO₂.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113982"},"PeriodicalIF":4.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145787340","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":"Extension of Pechini synthesis of high-entropy oxides: Preparation of mesoporous high-entropy materials","authors":"Manjula M. Kandage,&nbsp;Michal Marszewski","doi":"10.1016/j.micromeso.2025.113996","DOIUrl":"10.1016/j.micromeso.2025.113996","url":null,"abstract":"<div><div>High-entropy oxides (HEOs) are rapidly finding applications in catalysis, energy storage, and energy conversion, thanks to their unique properties, such as high compositional complexity, diversity of chemical environments in the material and on its surface, as well as a high potential for synergistic and cocktail effects. However, as HEOs are frequently synthesized using solids-state or similar high-temperature methods, they also feature rather low surface areas and pore volumes, which negatively impacts their performance in applications involving surface and interface phenomena. The present work demonstrates two extensions to the Pechini-type synthesis of high-entropy oxides that aim to afford mesoporous HEOs with well-developed pore structures. Five example HEOs, with varied compositions and structures, were used as model HEOs, including fluorite (Gd_0.2La_0.2Y_0.2Hf_0.2Zr_0.2)O_2-x, spinel (Al_1/6Co_1/6Cr_1/6Fe_1/6Mn_1/6Ni_1/6)₃O₄, perovskite (Na_0.2Bi_0.2Ba_0.2Sr_0.2Ca_0.2)TiO₃, perovskite (Na_0.2K_0.2Ca_0.2La_0.2Ce_0.2)TiO₃, and rock-salt (Co_0.2Cu_0.2Mg_0.2Ni_0.2Zn_0.2)O. These HEOs were tested in (i) a hard-templating Pechini synthesis with Ludox SM-AS colloidal silica as the template and (ii) a two-step Pechini synthesis with the carbon template generated in-situ, and compared with HEOs synthesized using the original Pechini-type synthesis. Both extensions successfully afforded mesoporous HEOs with well-developed pore structures, with the former method affording materials with specific surface areas up to 142 m² g^–1 and total pore volumes up to 0.19 cm³ g^–1 while the latter up to 164 m² g^–1 and 0.25 cm³ g^–1, respectively. Both strategies have similar set of limitations, including low crystallinity and limited compatibility. Thus, both methods seem to be complimentary strategies for the synthesis of mesoporous HEOs, chosen mainly based on the compatibility with the target HEO.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113996"},"PeriodicalIF":4.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145787342","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":"Influence of mesostructural order on the gas-sensing performance of tin dioxide-mesoporous alumina composite","authors":"Federico Schipani ,&nbsp;David Smirnoff ,&nbsp;Fernando P. Cometto ,&nbsp;Rodrigo Parra ,&nbsp;Carla di Luca","doi":"10.1016/j.micromeso.2025.113962","DOIUrl":"10.1016/j.micromeso.2025.113962","url":null,"abstract":"<div><div>This study investigates the synthesis and gas-sensing performance of SnO₂- mesoporous alumina, focusing on the influence of pore ordering and calcination temperature on sensing response. Two sol-gel routes based on the Evaporation-Induced Self-Assembly (EISA) strategy were employed: Method M, which produced ordered mesoporous structures, and Method C, which led to disordered porosity. Both methods yielded materials with high surface areas (∼250 m²/g) and uniform tin dispersion within an amorphous alumina matrix after heat-treatment at 400 °C. The samples were thoroughly characterized by TEM, FESEM-EDS, N₂ physisorption, XPS, and XRD, confirming the development of well-defined mesostructures. Gas-sensing tests revealed that the disordered sample (Method C) exhibited markedly higher sensitivity, up to a 230-fold increase in conductivity and faster response times (∼4 s) when exposed to CO₂, NO₂, and H₂, compared to the ordered counterpart. Furthermore, increasing the heat-treatment temperature to 900 °C induced structural collapse and phase segregation, significantly worsening sensor performance. In agreement with the insulating nature of the host matrix, electrical conductivity arises primarily via thermally activated electron hopping. These results reveal that structural disorder enhances surface reactivity and electrical conductivity. These findings underscore the potential of tin dioxide-mesoporous alumina composite as a robust and efficient material for gas detection applications.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113962"},"PeriodicalIF":4.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682704","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":"Biomass based ultralight monolithic aerogels of two-dimensional nanostructures","authors":"Apostolos Koutsioukis ,&nbsp;Christina Rista ,&nbsp;Eleni Tegkelidi ,&nbsp;Christos Priovolos ,&nbsp;Dimitris Manolis ,&nbsp;Konstantina Goumenou ,&nbsp;Elli Bellou ,&nbsp;Argyris Kolokithas Ntoukas ,&nbsp;Konstantinos Ar Papageorgiou ,&nbsp;Vasilios I. Georgakilas","doi":"10.1016/j.micromeso.2025.113978","DOIUrl":"10.1016/j.micromeso.2025.113978","url":null,"abstract":"<div><div>The biomass extracted in water after ultrasonic treatment of red pepper powder contributes to the liquid exfoliation of solids such as graphite, hematite, magnetite and silicon and the formation of two-dimensional nanostructures. Afterwards, the amphiphilic biomass acting as a gelator, contributes to the formation of soft hydrogels and the corresponding ultralight monolithic aerogels based on the graphene, hematene, magnetene and silicene nanosheets resulting from the liquid exfoliation. Depending on the basic chemical element of the nanostructures, these novel aerogels exhibited extremely low densities, between 4.22 mg cm⁻³ with silicene and 14.35 mg cm⁻³ with magnetene and porosities exceeding 99.7 %. The monolithic ultralight graphene, hematene and magnetene aerogels were fully sustainable as they are derived from natural materials such as minerals hematite, magnetite and graphite, a natural product such as red pepper and water as solvent. Energy consumption for the basic aerogel formation process was also limited compared to other techniques due to the use of short-duration ultrasound.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113978"},"PeriodicalIF":4.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682635","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":"Three-dimensional heterogeneous electro-Fenton with traditional Fe-zeolites for the efficient removal of 1,4-dioxane","authors":"Xiaosan Song ,&nbsp;Po Zhao ,&nbsp;Xuan Zhang","doi":"10.1016/j.micromeso.2025.113973","DOIUrl":"10.1016/j.micromeso.2025.113973","url":null,"abstract":"<div><div>1,4-Dioxane (1.4-DX) as an emerging organic pollutant poses a serious threat to human health and the ecological environment. However, effective removal is still a challenge in wastewater treatment. In this study, we successfully synthesized Fe-ZSM-5 zeolite and employed it as an adsorbent/catalyst for the removal of 1,4-DX. The characterization results of SEM, XRD and N₂ adsorption-desorption exhibited a large surface and good textural properties of Fe-ZSM-5 zeolite, implying excellent adsorption performance and high catalytic efficiency for 1,4-DX. The adsorption equilibrium of 1,4-DX on Fe-ZSM-5 zeolite can be reached a maximum adsorbed amount of 43.15 mg/g within 5 min, and experimental adsorption data were fitted well with the Langmuir isotherms and pseudo-second-order kinetics. The optimum removal efficiency of 1,4-DX, i.e. 90.3 % for 180 min of treatment, was observed at pH of 3.0–5.0, anode of Ti/pt, catalyst dosage of 1 g/L, current density of 20 mA/cm², and initial target pollutant concentration of 10 mg/L. Moreover, Fe-ZSM-5 zeolite showed an exhibited excellent stability and reusability, with little change in removal efficiency over five cycles. Degradation product analysis speculated possible oxidative degradation pathways. Quenching experiments indicated that <strong>^.</strong>OH and O₂<strong>^.</strong>^- formed by the oxidation reaction of Fe-ZSM-5 zeolite with hydrogen peroxide produced by electrochemical in-situ oxidation were the main reactive oxygen species for the oxidative degradation of 1,4-DX. This study demonstrated that the three-dimensional heterogeneous electro-Fenton with traditional Fe-zeolites may be a promising technology for organic wastewater.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113973"},"PeriodicalIF":4.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682636","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":"Chromonic-liquid-crystal-templated synthesis of powdered and monolithic silica materials: mechanism, textural properties and drug delivery","authors":"Adrià Pérez-Calm ,&nbsp;Claudia Müller-Sánchez ,&nbsp;Anna Maria Piña Cañaveras ,&nbsp;Eva Berteloot ,&nbsp;Santiago Grijalvo ,&nbsp;Soraia P.S. Fernandes ,&nbsp;Yury V. Kolen'ko ,&nbsp;Oleg Lebedev ,&nbsp;Jordi Esquena ,&nbsp;Manuel Reina ,&nbsp;Carlos Rodríguez-Abreu","doi":"10.1016/j.micromeso.2025.113977","DOIUrl":"10.1016/j.micromeso.2025.113977","url":null,"abstract":"<div><div>Lyotropic chromonic liquid crystals (LCLC) enable the templating of silica fibers with aligned porous structures and tunable pore size, properties that hold significant potential for applications like controlled drug delivery. LCLC guide the synthesis of microporous and mesoporous silicas through sol-gel reactions in the presence of silicon alkoxides, such as tetraethyl orthosilicate (TEOS), typically producing fibers with long, aligned pores and specific surface areas around 200–300 m²/g. Here, we develop micro/mesoporous silica materials using a cationic chromonic perylene diimide as template, combined with a porogenic silica precursor, hexadecyl trimethoxysilane (HDTMS), to achieve increased specific surface areas and larger pore sizes compared to conventional TEOS-based chromonic-templated silicas. The resulting silica materials can be fabricated as macroscopic, centimeter-sized monoliths with tunable porosity, composed of entangled silica nanofibers forming a networked structure. These highly porous monoliths were evaluated as carriers of small drugs (ibuprofen), and demonstrated high encapsulation efficiencies, as well as sustained drug release in a simulated body fluid (SBF, pH = 7.4), achieving complete release within 24 h. In contrast, powdered silica samples of the same composition showed poorer encapsulation efficiencies and faster release rates, highlighting the advantages of monolithic structures for drug delivery. Furthermore, hydroxyapatite (HAp) was deposited onto the silica monoliths to produce robust composite scaffolds, whose degradation products did not affect HEK293 cell viability.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113977"},"PeriodicalIF":4.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682638","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":"Influence of solvent effect on the amine-free synthesis of high-silica ZSM-5 with the investigation of mechanism","authors":"Aojing Deng ,&nbsp;Ruizhen Zhang ,&nbsp;Jiamin Li ,&nbsp;Yifei Pan ,&nbsp;Danxue Zhang ,&nbsp;Kai Zong","doi":"10.1016/j.micromeso.2025.113924","DOIUrl":"10.1016/j.micromeso.2025.113924","url":null,"abstract":"<div><div>Amine-free synthesis of high-silica ZSM-5 (SAR ≥200) remained a significant challenge due to the instability of the silica-rich framework under alkaline conditions. In this study, a facile and efficient synthetic route for high-silica ZSM-5 (SAR = 300) was developed with the assistance of silicalite-1 seed and short-chain alcohol. Firstly, high-crystalline ZSM-5 (80 % relative crystallinity) with hexagonal prism morphology and the size of 850–1500 nm was successfully synthesized by systematically optimizing the solvent composition (EtOH/SiO₂ = 4–8, H₂O/SiO₂ = 15–25) and alkalinity (Na₂O/SiO₂ = 0.03–0.04). Then, replacing ethanol with butanol further enhanced the crystallinity (&gt;95 %) and reduced crystal size (750–1300 nm), attributed to the fact that water-butanol mixture had a lower dielectric constant than water-ethanol mixture, which could more effectively weaken the solvent's charge-shielding capability and improve the electrostatic interaction between Na⁺ and negatively charged species, thereby promoting the nucleation and the assembly of MFI skeleton. In summary, this work provided a concise process for the synthesis of high-silica ZSM-5 with the assistance of alcohol and silicalite-1 seed, which enabled the cost-effective, eco-friendly production of high-silica ZSM-5 with high crystallinity in the amine-free system.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113924"},"PeriodicalIF":4.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145787310","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":"Efficient synthesis of well-defined ordered mesoporous aluminosilicates with tailorable acidity","authors":"Selina Itzigehl ,&nbsp;Tom Ott ,&nbsp;Anne-Kathrin Ströhle ,&nbsp;Hoang-Huy Nguyen ,&nbsp;Roham Talei ,&nbsp;Nağme Ay ,&nbsp;Maxwell W. Terban ,&nbsp;Michael Dyballa ,&nbsp;Guido Schmitz ,&nbsp;Deven P. Estes ,&nbsp;Johanna R. Bruckner","doi":"10.1016/j.micromeso.2025.113991","DOIUrl":"10.1016/j.micromeso.2025.113991","url":null,"abstract":"<div><div>This study systematically investigates the synthesis and structural properties of ordered mesoporous aluminosilicates (OMAS) prepared via a direct liquid crystal templating (DLCT) approach. By varying the aluminum concentration and polycondensation temperature, we assess their impact on the materials’ structural order, pore size distribution, and surface acidity. Unlike conventional preparation processes, the DLCT method allows a near-stochiometric incorporation of aluminum into OMAS, without formation of detectable aluminum deposits, in a simple one-pot synthesis. Small-angle X-ray scattering and nitrogen physisorption analyses reveal that increasing aluminum content initially enhances mesostructural order, which again deteriorates at molar silicon to aluminum ratios below 5. Additionally, even small amounts of aluminum reduce the pore size by a constant value, likely due to a salting-out effect which reduces the micelle size. Total scattering and ²⁷Al MAS NMR provide insights into the atomic structure of the OMAS. Brønsted acid site density peaks at intermediate aluminum loadings, while the number of Lewis acid sites increases steadily with the total Al content. The polycondensation temperature plays a crucial role in structure formation, with higher temperatures favoring better mesostructural order in OMAS, contrasting with trends in ordered mesoporous silica, where lower temperatures are typically more favorable. These findings provide crucial insights into the preparation of OMAS with tunable acidity and well-defined structural properties for advanced catalytic applications.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113991"},"PeriodicalIF":4.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145787311","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}