Microporous and Mesoporous Materials最新文献_第2页

Phosphate removal from aqueous solution using ytterbium oxide supported mesoporous silicas (SBA-15, KIT-6 & MCM-41) 使用氧化镱负载的介孔二氧化硅（SBA-15， KIT-6和MCM-41）去除水溶液中的磷酸盐

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-05-14 DOI: 10.1016/j.micromeso.2025.113681

Mozhdeh Gholami, James Tardio

{"title":"Phosphate removal from aqueous solution using ytterbium oxide supported mesoporous silicas (SBA-15, KIT-6 & MCM-41)","authors":"Mozhdeh Gholami, James Tardio","doi":"10.1016/j.micromeso.2025.113681","DOIUrl":"10.1016/j.micromeso.2025.113681","url":null,"abstract":"<div><div>In this study, a series of ytterbium supported mesoporous silicas, SBA-15, KIT-6 and MCM-41 (containing different amounts of Yb) were studied for phosphate removal from aqueous solution. The prepared materials were characterized by X-ray diffraction, N2 adsorption/desorption (BET), HRTEM and XPS. All of the materials prepared were found to possess an ordered hexagonal mesoporous structure. The best performing materials under the conditions used (in terms of maximum adsorption capacity) for each of the silica supports were 0.3 Yb SBA-15, 0.1 Yb KIT-6, and 0.1 Yb MCM-41 which had maximum adsorption capacities of 20.1 mg P/g, 20.9 mg P/g and 20.5 mg P/g respectively. The aforementioned best performing materials were found to have slightly higher maximum adsorption capacities at lower pH (pH 3 and 5, compared to pH 6) whilst the coexistence of chloride, sulphate and nitrate, were found to have no significant effect on phosphate adsorption. Bicarbonate ion was found to have a significant negative effect on adsorption capacity – this however was most likely due to this ion increasing the solution pH which in turn causes reduced adsorption. It was found that adsorbed phosphate could be readily desorbed from the materials studied using HNO<sub>3</sub> (5 %) at room temperature. Reuse tests showed a slightly reduced adsorption capacity for the materials for which regeneration studies were conducted.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"395 ","pages":"Article 113681"},"PeriodicalIF":4.8,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144105885","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

Hierarchically structured nanoporous organic polymers as a rapid electrochemical platform for monitoring trace heavy metal ions 分层结构的纳米多孔有机聚合物作为监测痕量重金属离子的快速电化学平台

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-05-14 DOI: 10.1016/j.micromeso.2025.113685

Dongyang Chen , Zihao Wang , Yufei Liu , Shuai Gu , Chenxiang Ai , Chunyue Pan , Guipeng Yu

{"title":"Hierarchically structured nanoporous organic polymers as a rapid electrochemical platform for monitoring trace heavy metal ions","authors":"Dongyang Chen , Zihao Wang , Yufei Liu , Shuai Gu , Chenxiang Ai , Chunyue Pan , Guipeng Yu","doi":"10.1016/j.micromeso.2025.113685","DOIUrl":"10.1016/j.micromeso.2025.113685","url":null,"abstract":"<div><div>Rapid electrochemical monitoring and detection of toxic heavy metal ions using chemically modified carbon paste electrodes (CPEs) is of great importance, but the development of chemically stable and porous CPE substrates with unique sensing properties remains challenging. Here, we synthesized nine low-cost nanoporous organic polymer (NOP) matrices under mild CPE conditions and developed highly sensitive graphite powder (GP)@NOP composite electrodes for sensing of trace heavy metal ions. These NOP substrates have great potential for electrochemical sensing due to their large surface area, layered porosity and excellent stability. The electrochemical properties, dominated by the pore structures of the NOPs, are simply turned by regulating the nature of the building blocks and crosslinkers. The micropores facilitate highly sensitive and selective detection and the mesopores benefit mass transfer. Using GP@NOP complex electrodes, the concentrations of the analyte show linear relationship with the oxidation current peak values over a concentration range of 0.0010–0.012 μg L<sup>−1</sup> with high correlation coefficients up to 0.996. Super-high sensitivity with a low detection limit (0.0003 μg L<sup>−1</sup>) and excellent reproducibility (relative standard deviation ≤ 7.4 %) is demonstrated, superior to the pristine GP electrode and most known electrodes. This study expands a novel application for NOPs and an alternative straightforward approach for the rapid and reliable detection of heavy metal ions.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"395 ","pages":"Article 113685"},"PeriodicalIF":4.8,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144089506","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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Fe-Cu bimetallic oxide encapsulated in ZSM-5 for efficient heterogeneous Fenton-like degradation of methylene blue ZSM-5包封Fe-Cu双金属氧化物对亚甲基蓝的高效非均相fenton降解

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-05-14 DOI: 10.1016/j.micromeso.2025.113688

Jiaze Chen , Huijie Xie , Yusen Chen , Dong Guo , Binjie Li , Xuanxuan Sun , Volodymyr Turkevych , Caixia Li , Dehong Chen , Lei Wang , Bin Li

{"title":"Fe-Cu bimetallic oxide encapsulated in ZSM-5 for efficient heterogeneous Fenton-like degradation of methylene blue","authors":"Jiaze Chen , Huijie Xie , Yusen Chen , Dong Guo , Binjie Li , Xuanxuan Sun , Volodymyr Turkevych , Caixia Li , Dehong Chen , Lei Wang , Bin Li","doi":"10.1016/j.micromeso.2025.113688","DOIUrl":"10.1016/j.micromeso.2025.113688","url":null,"abstract":"<div><div>Fenton-like degradation based on iron catalyst have been developed to remove organic pollutants from wastewater. However, iron-based catalysts still face challenges of poor accessibility and stability of active sites. Here, we report a facile and green method for the preparation of Fe<sub>x</sub>Cu<sub>(1-x)</sub>@HZSM-5 catalyst using ethylenediamine as an organic ligand to stabilize metal species via a combination of solid-state grinding and steam-assisted crystallization methods without organic templates. Due to the confinement of zeolite ZSM-5 framework and synergistic effect of Fe and Cu bimetals, the optimized Fe<sub>0.8</sub>Cu<sub>0.2</sub>@HZSM-5 catalyst exhibits excellent activity and reusability in the Fenton-like degradation of methylene blue at the neutral condition. Our strategy for fabricating bimetal@zeolite can bring about new thoughts for the preparation of iron-based catalyst with high efficiency for Fenton-like degradation.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"395 ","pages":"Article 113688"},"PeriodicalIF":4.8,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144115896","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

Efficient preparation of CuCe-SAPO-34 catalyst and its NH3-SCR performance cce - sapo -34催化剂的高效制备及其NH3-SCR性能研究

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-05-14 DOI: 10.1016/j.micromeso.2025.113684

Bohui Cai , Junyan Liu , Zijing An, Yue Wang, Yan Du, Chengyang Yin

{"title":"Efficient preparation of CuCe-SAPO-34 catalyst and its NH3-SCR performance","authors":"Bohui Cai , Junyan Liu , Zijing An, Yue Wang, Yan Du, Chengyang Yin","doi":"10.1016/j.micromeso.2025.113684","DOIUrl":"10.1016/j.micromeso.2025.113684","url":null,"abstract":"<div><div>Excessive levels of NO<sub>x</sub> in the atmosphere can cause various environmental issues, including acid rain, ozone layer depletion, and photochemical smog—conditions that pose serious risks to human health. As a result, reducing NO<sub>x</sub> emissions from vehicle exhaust is an urgent global challenge that demands attention. Ammonia selective catalytic reduction (NH<sub>3</sub>-SCR) technology is widely used for exhaust gas treatment because of its high denitrification efficiency and stability. The effectiveness of NH<sub>3</sub>-SCR largely depends on the catalyst employed. Among the available catalysts, Cu-SSZ-13 zeolites have shown exceptional promise due to their high NO<sub>x</sub> conversion rates, N<sub>2</sub> selectivity, and hydrothermal stability. However, the high cost of the templates used in Cu-SSZ-13 makes Cu-SAPO-34 which has the same CHA structure with Cu-SSZ-13 a more economically viable option for commercial use. To further improve both the denitrification performance and hydrothermal stability of Cu-SAPO-34 catalysts, this study introduces Cerium, a rare-earth metal, to modify the Cu-SAPO-34 catalyst for NH<sub>3</sub>-SCR applications. The experimental results show that the incorporation of Ce significantly enhances the catalytic performance, particularly at low temperatures, while also improving the low-temperature hydrothermal stability of CuCe-SAPO-34. Characterization analysis reveals that the introduction of Ce increases the number of acid sites and facilitates the redox cycling process, both of which contribute to the enhanced catalytic activity. These findings underscore the crucial role of Ce in optimizing the performance of CuCe-SAPO-34 catalysts, making them a promising candidate for more efficient and cost-effective NO<sub>x</sub> reduction in vehicle exhaust treatment.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"394 ","pages":"Article 113684"},"PeriodicalIF":4.8,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143941124","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

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}

引用次数: 0

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