Microporous and Mesoporous Materials最新文献_第9页

Bimetallic Pt-Pd nanoparticles on hierarchical core-shell zeolite for deep hydrogenation of naphthalene 层状核壳沸石上的Pt-Pd双金属纳米颗粒用于萘的深度加氢

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-05-12 DOI: 10.1016/j.micromeso.2025.113686

Haiwei Li, Zhipeng Su, Xueyin Zhang, Tiehong Chen

{"title":"Bimetallic Pt-Pd nanoparticles on hierarchical core-shell zeolite for deep hydrogenation of naphthalene","authors":"Haiwei Li, Zhipeng Su, Xueyin Zhang, Tiehong Chen","doi":"10.1016/j.micromeso.2025.113686","DOIUrl":"10.1016/j.micromeso.2025.113686","url":null,"abstract":"<div><div>A hierarchical core-shell structured catalyst was designed to address the mass transfer limitations and low selectivity of noble metal catalysts in the deep hydrogenation of polycyclic aromatic hydrocarbons (PAHs). The modified support was subsequently functionalized with Pt-Pd bimetallic nanoparticles through incipient wetness impregnation to construct a high-performance naphthalene hydrogenation catalyst. Characterization revealed that mesopores (6–11 nm) were created by the alkaline treatment, while the original microporous structure was retained, resulting in enhanced mass transfer efficiency. The distribution of acidic sites was effectively modulated through the desilication process. Uniform Pt-Pd alloy nanoparticles (3–5 nm) were shown to exhibit strong electronic synergy, as evidenced by a 0.3 eV positive shift in the Pd 3d binding energy, which improved hydrogen activation. The 0.75 wt% Pt-Pd/H-Beta-73 catalyst achieved 99 % naphthalene conversion with 68.6 % decalin selectivity at 240 °C, representing a significant improvement over monometallic catalysts. The hierarchical pore structure facilitated both reactant diffusion and accessibility to acidic sites, while the interaction between Pt-Pd alloys and Brønsted acid sites promoted deep hydrogenation via hydrogen spillover and substrate adsorption. This research introduces a “mesopores-acid-metal” optimization strategy, providing new insights into the development of advanced catalytic systems for converting polycyclic aromatics into high-value chemicals.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"395 ","pages":"Article 113686"},"PeriodicalIF":4.8,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068109","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}

引用次数: 0

Silicalite-1 defect-trapped PdO clusters with long-term super-stability for catalytic oxidation of methane in wet conditions 具有长期超稳定性的硅石-1缺陷捕获PdO簇在湿条件下催化氧化甲烷

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-05-12 DOI: 10.1016/j.micromeso.2025.113678

Tao Wang, Chao Xiao, Qiao Yu, Zhilin Chen, Shuming Peng

{"title":"Silicalite-1 defect-trapped PdO clusters with long-term super-stability for catalytic oxidation of methane in wet conditions","authors":"Tao Wang, Chao Xiao, Qiao Yu, Zhilin Chen, Shuming Peng","doi":"10.1016/j.micromeso.2025.113678","DOIUrl":"10.1016/j.micromeso.2025.113678","url":null,"abstract":"<div><div>Development of a stable catalyst resistant to steam-induced sintering (10 vol%−15 vol% H<sub>2</sub>O, 450–550 °C) is challenging for catalytic combustion/oxidation of methane. We use the silicalite-1's internal defects to trap PdO clusters to construct a stable catalyst (PdO/silicalite-1). Silicalite-1 with sufficient amounts of silanol defects and ion exchange at alkaline condition are critical for this defect-trapping strategy. PdO/silicalite-1 shows long-term super-stability with respect to the temperatures and steam concentrations. The conversion remained stable over 200 h at 500 °C (10 vol% H<sub>2</sub>O) and declined slightly during 380 h at 550 °C (10 vol% H<sub>2</sub>O). PdO/silicalite-1's catalytic activity deteriorated slightly after hydrothermal aging at 750 °C or thermal aging at 850 °C. Electron microscopy reveals two growth modes for PdO clusters within silicalite-1 (PdO<sub>in</sub>) and on the external surface (PdO<sub>surf</sub>). PdO<sub>surf</sub> clusters agglomerate into PdO particles of 5–15 nm directly, but PdO<sub>in</sub> clusters first fuse into strip-shaped PdO<sub>in</sub> clusters, then migrate outwards and further agglomerate into PdO nanoparticles.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"395 ","pages":"Article 113678"},"PeriodicalIF":4.8,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071482","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}

引用次数: 0

Fluoride-free synthesis of plate-like Sn-Beta zeolite via aerosol-assisted hydrothermal route

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-05-10 DOI: 10.1016/j.micromeso.2025.113682

Xueying Xie , Siyang Yan , Weiming Zhai , Zhenlei Zhang , Liping Liu , Jiaxu Liu , Guang Xiong , Feng Liu

引用次数: 0

Fly ash converting into ordered mesoporous silica materials for water purification from azo dyes 粉煤灰转化成有序介孔二氧化硅材料用于偶氮染料水净化

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-05-10 DOI: 10.1016/j.micromeso.2025.113683

Agata Jankowska , Rafał Panek , Wojciech Franus , Joanna Goscianska

{"title":"Fly ash converting into ordered mesoporous silica materials for water purification from azo dyes","authors":"Agata Jankowska , Rafał Panek , Wojciech Franus , Joanna Goscianska","doi":"10.1016/j.micromeso.2025.113683","DOIUrl":"10.1016/j.micromeso.2025.113683","url":null,"abstract":"<div><div>Extensively used azo dyes enter water bodies, posing a serious threat to the environment. Their removal is of great importance, hence, methods based on low-cost adsorbents derived from waste materials are currently being developed. In this study, fly ash-based silica materials (MCM-41 and SBA-15) were subjected to modifications with 3-aminopropyltrimethoxysilane (APTMS) and 3-aminopropyltriethoxysilane (APTES) to obtain novel and cheap adsorbents for the elimination of sunset yellow FCF and tartrazine from water. The functionalization significantly altered the samples’ porosity, structure ordering, and acid-base properties. The introduction of amine groups into the samples was confirmed by the increase in nitrogen content and the presence of new bands on FT-IR spectra. The influence of pH (2–9), temperature (RT, 35 °C, 45 °C), contact time (0–240 min), and initial azo dyes concentration (12.5–900 mg L<sup>−1</sup>) on sorption capacities of the obtained adsorbents was evaluated. The pH value of 2 was the most favorable for dye adsorption as a consequence of electrostatic interactions between their SO<sub>3</sub><sup>−</sup> groups and NH<sub>3</sub><sup>+</sup> groups of adsorbents. APTMS-modified MCM-41 exhibited the highest sorption capacities toward sunset yellow FCF (531 mg g<sup>−1</sup>) and tartrazine (360 mg g<sup>−1</sup>). The adsorption kinetics followed the pseudo-second-order kinetic model, and the experiments on the regeneration of silica materials showed that modified adsorbents have potential for multiple reuses, thereby reducing the generation of waste.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"395 ","pages":"Article 113683"},"PeriodicalIF":4.8,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144115897","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}

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Amine-modified bimodal meso/macroporous silica for CO2 capture 胺改性双峰介孔/大孔二氧化硅捕集CO2

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-05-09 DOI: 10.1016/j.micromeso.2025.113680

Elena A. Chernikova , Lev M. Glukhov , Vladimir G. Krasovskiy , Gennadiy I. Kapustin , Nikolay A. Davshan , Igor V. Mishin , Leonid M. Kustov

引用次数: 0

Enhancing albendazole dissolution using SBA-15 carriers with uniform morphology and tunable textural properties 利用均匀形貌和可调结构性能的SBA-15载体增强阿苯达唑的溶解性

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-05-08 DOI: 10.1016/j.micromeso.2025.113679

Loreana Gallo , Inés Silvia Tiscornia , María Esperanza Adrover

{"title":"Enhancing albendazole dissolution using SBA-15 carriers with uniform morphology and tunable textural properties","authors":"Loreana Gallo , Inés Silvia Tiscornia , María Esperanza Adrover","doi":"10.1016/j.micromeso.2025.113679","DOIUrl":"10.1016/j.micromeso.2025.113679","url":null,"abstract":"<div><div>Most existing drugs exhibit poor water solubility, limiting their dissolution and absorption. Consequently, enhancing their solubility and dissolution rates represents a major challenge in the development of oral delivery systems. Mesoporous silica materials are a promising strategy, as they can improve drug dissolution rates by its amorphization within their pores. As textural properties of mesoporous silica play a key role; these properties were varied by synthesizing three SBA-15 materials with the same morphology using different procedures. The mesoporous materials were loaded with the poorly water-soluble drug albendazole (ABZ). Two ABZ:SBA-15 ratios and two loading methods were evaluated. Regarding the influence of synthesis variables on the textural properties, as the aging temperature increases, the mesopore size increases. The increment of the ripening temperature led to the lowest surface area and micropore volume. The lowest calcination temperature resulted in the highest values for surface area, total pore volume and isolated silanols concentration. The highest ABZ:SBA-15 ratio led to the highest drug loading percentage (DL%, w/w), regardless of the loading method. SBA-15 synthesized with the highest -OH concentration and the maximum surface area and pore volume values showed the highest DL%. SBA-15 with the lowest surface area and pore diameter without micropores achieved the highest drug dissolution rate. These textural properties might limit the re-crystallization of the drug inside the pores. In addition, in this sample the lowest ABZ:SBA-15 ratio under study did not present peaks in the thermograms indicating drug amorphization within the pores.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"395 ","pages":"Article 113679"},"PeriodicalIF":4.8,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068556","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}

引用次数: 0

Mesoporous amino-functionalized HKUST-1(Fe) for rapid adsorption of aqueous trace mercury with regeneration ability 介孔氨基功能化HKUST-1（Fe）快速吸附水中痕量汞并具有再生能力

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-05-06 DOI: 10.1016/j.micromeso.2025.113677

Shuaibo Song , Zheng Chen , Dingfan Yan, Jiahao Lu, Simin Wang, Jinbo Zhang, Fang Yuan

{"title":"Mesoporous amino-functionalized HKUST-1(Fe) for rapid adsorption of aqueous trace mercury with regeneration ability","authors":"Shuaibo Song , Zheng Chen , Dingfan Yan, Jiahao Lu, Simin Wang, Jinbo Zhang, Fang Yuan","doi":"10.1016/j.micromeso.2025.113677","DOIUrl":"10.1016/j.micromeso.2025.113677","url":null,"abstract":"<div><div>Trace Hg<sup>2+</sup> posed a serious threat to water safety. However, adsorption materials that can remove low concentration of mercury from water are still needed to be developed. In this work, amino-functionalized HKUST-1(Fe) with mesopores structure was synthesized by a one-pot method for the adsorption of trace mercury in the aqueous environment. Favorable pore conditions were beneficial for the diffusion of Hg<sup>2+</sup>. The doping of Fe<sup>3+</sup> improved the stability of the material, effectively inhibited the original metal ion leaching by 85.54 % decrease. In addition, NH<sub>2</sub>-BDC, and EDTA introduced nitrogen-containing groups to provide numerous active sites which captured Hg<sup>2+</sup> specifically. Under optimal conditions, based on the changes in the binding energies of -NH-and O-C=O, HKUST(Fe)-NH<sub>2</sub>@EDTA removed 95.45 % of Hg<sup>2+</sup> (the initial concentration as low as 10 μg L<sup>−1</sup>) within 10 min, with a maximum adsorption capacity of 1206.62 mg/g. After four adsorption-desorption cycles, it was still capable of removing 85.94 % of Hg<sup>2+</sup> with regeneration performance. Combined with the excellent selectivity and anti-interference, the composited realized the removal of Hg<sup>2+</sup> in real water samples, which meet the drinking water standards. This study provided a theoretical basis for the rapid and efficient adsorption of trace mercury in water by novel nanomaterials.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"394 ","pages":"Article 113677"},"PeriodicalIF":4.8,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143924314","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}

引用次数: 0

Machine learning applications in SEM-based pore analysis: a review 机器学习在基于扫描电镜的孔隙分析中的应用综述

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-05-05 DOI: 10.1016/j.micromeso.2025.113675

Efi-Maria Papia , Alex Kondi , Vassilios Constantoudis

{"title":"Machine learning applications in SEM-based pore analysis: a review","authors":"Efi-Maria Papia , Alex Kondi , Vassilios Constantoudis","doi":"10.1016/j.micromeso.2025.113675","DOIUrl":"10.1016/j.micromeso.2025.113675","url":null,"abstract":"<div><div>Scanning Electron Microscopy (SEM) is a cornerstone technique for analyzing porous materials, providing high-resolution images essential for understanding material properties and performance. However, traditional SEM image analysis methods often involve manual interpretation and are limited by challenges such as noise, segmentation difficulties, and resolution constraints. Recent advancements in machine learning have revolutionized SEM image analysis, offering automated, accurate, and scalable solutions. These technologies enable precise pore size distribution measurement, pore shape classification, and network connectivity analysis while enhancing image quality through advanced denoising techniques. This paper reviews the integration of Artificial Intelligence (AI) in SEM-based porous material analysis, discussing its applications, challenges, and future directions. Through highlighting key contributions in the field, we aim to provide a comprehensive overview of how AI is reshaping SEM image analysis and unlocking new possibilities for porous material characterization, also emphasizing challenges and limitations that arise.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"394 ","pages":"Article 113675"},"PeriodicalIF":4.8,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143906001","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}

引用次数: 0

Anchoring atomic Pt on MFI zeolite framework Zn to construct stable and active propane dehydrogenation catalyst 将Pt原子锚定在MFI分子筛骨架Zn上，构建稳定、活性丙烷脱氢催化剂

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-05-05 DOI: 10.1016/j.micromeso.2025.113676

Rui Zhou, Hongjiang Li, Shenmin Li, Yingna Cui, Xinping Wang

{"title":"Anchoring atomic Pt on MFI zeolite framework Zn to construct stable and active propane dehydrogenation catalyst","authors":"Rui Zhou, Hongjiang Li, Shenmin Li, Yingna Cui, Xinping Wang","doi":"10.1016/j.micromeso.2025.113676","DOIUrl":"10.1016/j.micromeso.2025.113676","url":null,"abstract":"<div><div>Constructing an efficient Pt intermetallic alloy (IMA) species inside the zeolite intrinsic micropore is highly desired for propane dehydrogenation (PDH) process. Typical impregnation method often results in inhomogeneous dispersion of metal species on the zeolite surface. Herein, we report a strategy of constructing PtZn IMA species within the silicalite-1 (S-1) zeolite crystals by introducing Pt (NH<sub>3</sub>)<sub>4</sub><sup>2+</sup> ions into the ZnS-1 zeolite channels via ion-exchange. It allowed all of the Pt in the catalyst to anchored at the framework Zn and eventually transform to atomic PtZn IMA species after reduction over there. The Pt@2ZnS-1 catalyst containing 0.073 wt% Pt and 2 wt% Zn exhibited an initial propylene formation rate of 214.2 mol<sub>C3H6</sub>∙g<sub>Pt</sub><sup>−1</sup>∙h<sup>−1</sup> and a deactivation rate 0.00023 h<sup>−1</sup> at 550 °C in 600 h' reaction in feed gas C<sub>3</sub>H<sub>8</sub>/H<sub>2</sub>/N<sub>2</sub> = 1/1/4 (V/V/V), and initial propylene formation rate of 301 mol<sub>C3H6</sub>∙g<sub>Pt</sub><sup>−1</sup>∙h<sup>−1</sup> and deactivation rate 0.00217 h<sup>−1</sup> in 100 h’ reaction in feed gas C<sub>3</sub>H<sub>8</sub>/N<sub>2</sub> = 1/4 (V/V).</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"394 ","pages":"Article 113676"},"PeriodicalIF":4.8,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143928359","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}

引用次数: 0

Introduction of iron by a feasible way to regulate Cu sites of Cu-SSZ-13 with enhanced hydrothermal stability and SO2 resistance for NH3-SCR 通过可行的方式引入铁调控Cu- ssz -13的Cu位点，提高了Cu- ssz -13的水热稳定性和抗SO2能力

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-05-01 DOI: 10.1016/j.micromeso.2025.113668

Mingjun Tan , Qi Zhao , Zhihui Wang , Die Qu , Bingbing Chen , Chuan Shi

{"title":"Introduction of iron by a feasible way to regulate Cu sites of Cu-SSZ-13 with enhanced hydrothermal stability and SO2 resistance for NH3-SCR","authors":"Mingjun Tan , Qi Zhao , Zhihui Wang , Die Qu , Bingbing Chen , Chuan Shi","doi":"10.1016/j.micromeso.2025.113668","DOIUrl":"10.1016/j.micromeso.2025.113668","url":null,"abstract":"<div><div>Copper-exchanged CHA zeolite has served as a commercial catalyst for selective catalytic reduction of NO<sub>x</sub> with NH<sub>3</sub> (NH<sub>3</sub>-SCR) in diesel aftertreatment systems for the last decade, in which the distribution of isolated Cu ions plays a vital role in the activity, SO<sub>2</sub> resistance, and hydrothermal stability. In this study, an innovative organic solvent-assisted incipient wetness impregnation strategy for fabricating Fe-modified Cu-SSZ-13 catalyst has been developed to regulate the distribution of Cu<sup>2+</sup>. Catalyst characterizations elucidated that Fe has been successfully incorporated into zeolite at ion-exchange sites. The introduction of Fe ions can effectively improve the dispersion of Cu<sup>2+</sup> and anchor more Cu<sup>2+</sup> at 6MR sites. Consequently, the bimetallic zeolite exhibits decent SO<sub>2</sub> resistance and hydrothermal stability compared to Cu-SSZ-13 which possesses a conspicuous prospect for practical application. This novel secondary-ion-assisted protocol for precise regulation of active sites distribution could provide fundamental insights for the rational design of high-performance NH<sub>3</sub>-SCR catalysts.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"394 ","pages":"Article 113668"},"PeriodicalIF":4.8,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143903541","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}

引用次数: 0