Microporous and Mesoporous Materials最新文献_第8页

Synthesis, derivation, and applications of imine-linked covalent organic frameworks: A comprehensive review

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-01-22 DOI: 10.1016/j.micromeso.2025.113516

Anjana P.N., Ajmal Koya Pulikkal

{"title":"Synthesis, derivation, and applications of imine-linked covalent organic frameworks: A comprehensive review","authors":"Anjana P.N., Ajmal Koya Pulikkal","doi":"10.1016/j.micromeso.2025.113516","DOIUrl":"10.1016/j.micromeso.2025.113516","url":null,"abstract":"<div><div>Crystalline 2D and 3D covalent organic frameworks (COFs) are formed by covalent bonds connecting light elements through thermodynamically reversible reactions. Among the numerous COFs synthesised, imine-linked COFs formed from Schiff bases are important and occupy a major share. A significant increase in the exploration of imine-linked COFs due to their better hydrolytic stability and availability of substrates has been noticed in recent years. This review article delves into the synthesis, post-synthetic modifications, and applications of imine-linked COFs. Methodologies such as solvothermal, microwave-assisted, mechanochemical, sonochemical, electron beam, plasma-induced, light-driven, and room temperature synthesis have been explored. De novo synthesis and post-synthetic modifications further extend the functional characteristics of imine COFs, enabling tailored properties for specific applications. The potential of imine-linked COFs in addressing critical challenges is highlighted through their applications in carbon dioxide and iodine uptake, separation processes, catalysis, drug delivery, etc. Their appealing qualities, such as durability, enhanced reactivity from non-bonding electrons of nitrogen, permanent porosity, and large surface area, are highly effective for diverse applications. This article provides a detailed understanding of the current advancements in the field, offering insights into future research directions for developing more efficient and functional imine COFs.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"387 ","pages":"Article 113516"},"PeriodicalIF":4.8,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163602","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

Catalytic performance of Au-Ti active site on MWW zeolite for oxidative cyclohexane to cyclohexanol/one in oxysteam condition

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-01-21 DOI: 10.1016/j.micromeso.2025.113519

Kui Xu , Sijia Liu , Xue Shao , Yuqi Yang , Xin Zhan , Guiying Wu , Ximin Wang , Meng Huang , Fang Jin

{"title":"Catalytic performance of Au-Ti active site on MWW zeolite for oxidative cyclohexane to cyclohexanol/one in oxysteam condition","authors":"Kui Xu , Sijia Liu , Xue Shao , Yuqi Yang , Xin Zhan , Guiying Wu , Ximin Wang , Meng Huang , Fang Jin","doi":"10.1016/j.micromeso.2025.113519","DOIUrl":"10.1016/j.micromeso.2025.113519","url":null,"abstract":"<div><div>A mixture of cyclohexanol and cyclohexanone (KA oil) is the main raw material for caprolactam and adipic acid. The Ti and Au was sequentially introduced into the deboronated MWW zeolite by atom-planting (AP) method and deposition-.precipitation method as the catalyst for cyclohexane oxidation by molecular oxygen with higher selectivity of KA oil. The tetra-coordinated Ti species introduced by AP method in the zeolite framework can highly disperse the Au nano-particles as an active site for the cyclohexane oxidation. The flexible MWW zeolite layer structure facilities modification the pore structure of ERB-1 zeolite by introduction of mesopore and exposed the more silanol group on the external surface of the zeolite the exposed pore size structure can improve the cyclohexane conversion and cyclohexanol selectivity. The optimal Au nano-particle size for oxidation is around 2 nm. Moreover, the cyclohexane oxidation conditions can be optimised by varying the oxygen pressure, solvent polarity and reaction time and temperature teaccording to the radical reaction mechanism.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"387 ","pages":"Article 113519"},"PeriodicalIF":4.8,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163663","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

Mechanism of confinement compensating for acid strength: The case of aromatic Wheland intermediate formation in zeolite catalysis

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-01-20 DOI: 10.1016/j.micromeso.2025.113515

Jingyi Tan , Yao Xiao , Guoliang Liu , Wei Chen , Anmin Zheng

{"title":"Mechanism of confinement compensating for acid strength: The case of aromatic Wheland intermediate formation in zeolite catalysis","authors":"Jingyi Tan , Yao Xiao , Guoliang Liu , Wei Chen , Anmin Zheng","doi":"10.1016/j.micromeso.2025.113515","DOIUrl":"10.1016/j.micromeso.2025.113515","url":null,"abstract":"<div><div>The catalytic performance of zeolite is contingent upon both the Brønsted acid strength and the confinement effect afforded by the acid site over the zeolite framework. In this investigation, systematic density functional theory (DFT) calculations have been conducted to elucidate the impact of acid strength and confinement effect on the formation and stability of the aromatic Wheland intermediate over zeolite. The theoretical results indicate that an increase in the intrinsic acid strength of the isolated 8T site can effectively reduce the barrier to the formation of the aromatic Wheland intermediate and significantly enhance the stability of the arene ion within ZSM-5 zeolite. Conversely, it was observed that the activated barriers were significantly reduced when the confinement effect of the zeolite framework was taken into account, which suggests that the apparent acid strength was enhanced. In this instance, the 72T model exhibits a comparable potential energy profile to that of the isolated acidic site, with a deprotonation energy (DPE) of 275.5 kcal/mol. Consequently, both zeolite confinement effect and acidity can decrease the activation energy of the reactions, and even change the reaction pathway. Moreover, the Wheland type complex in the H/D exchange of benzene can serve as a transition state or an intermediate, depending on the strength of acidity and the confinement effect.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"387 ","pages":"Article 113515"},"PeriodicalIF":4.8,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143162781","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 planar TS-1 supported molybdenum catalyst for green epoxidation of olefins: Synthesis, characterization and catalytic properties

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-01-20 DOI: 10.1016/j.micromeso.2025.113520

Beining Luo, Yan Wang, Yingqi Zhang, Caifeng Qiu, Guoqiang Yu, Liang Li, Xianzai Yan, Guoqiang Wu

{"title":"Mesoporous planar TS-1 supported molybdenum catalyst for green epoxidation of olefins: Synthesis, characterization and catalytic properties","authors":"Beining Luo, Yan Wang, Yingqi Zhang, Caifeng Qiu, Guoqiang Yu, Liang Li, Xianzai Yan, Guoqiang Wu","doi":"10.1016/j.micromeso.2025.113520","DOIUrl":"10.1016/j.micromeso.2025.113520","url":null,"abstract":"<div><div>Catalytic epoxidation limitations of conventional ellipsoid titanosilicate-1 (TS-1) remains owing to the narrow microporous channels and low efficiency of the Ti species. Herein, two-dimensional planer TS-1 zeolite (TS-1-P) was synthesized by adding crystal growth regulator in the hydrothermal synthesis process, and then TS-1-P supported molybdenum (Mo/TS-1-P) and mesoporous Mo/TS-1-P (Mo/MTS-1-P) were prepared and applied in epoxidation of olefins. The TS-1-P and the modified TS-1-P catalysts show a similar MFI framework and grain morphology but the different pore structure and coordination environment of Ti or Mo species. Especially, the Mo/MTS-1-P possesses many mesoporous pore and highly dispersed Mo species, which can improve the coordination environment of Ti species and weaken the Ti-O bond, the results are beneficial for the framework Ti species to combine more easily with H<sub>2</sub>O<sub>2</sub> to C=C band of the olefin molecules. Therefore, compared with TS-1-P, Mo/MTS-1-P exhibits the highest conversion of ACH (91.78 %) and 1-hexene (47.44 %) in the epoxidation of ACH and 1-hexene, respectively, the selectivity of epoxidized products simultaneous is above 96.42 % and 94.04 %, respectively. Moreover, the deactivation behavior of carbon deposit on the catalyst surface and regeneration method were also proposed. The successful preparation of Mo/MTS-1-P not only results in an efficient catalyst for epoxidation process but also provides a possible approach for surface and pore structure modification of TS-1 zeolite.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"387 ","pages":"Article 113520"},"PeriodicalIF":4.8,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163605","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

Manipulating pore structures of SSZ-13 zeolite membranes via hydrocracking activation for superior H2/CO2 separation

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-01-20 DOI: 10.1016/j.micromeso.2025.113518

Weibo Chen , Feng Ye , Shuanshi Fan, Yanhong Wang, Xuemei Lang, Zijian Zhang, Gang Li

{"title":"Manipulating pore structures of SSZ-13 zeolite membranes via hydrocracking activation for superior H2/CO2 separation","authors":"Weibo Chen , Feng Ye , Shuanshi Fan, Yanhong Wang, Xuemei Lang, Zijian Zhang, Gang Li","doi":"10.1016/j.micromeso.2025.113518","DOIUrl":"10.1016/j.micromeso.2025.113518","url":null,"abstract":"<div><div>Manipulating pore structures with precisely controlled pore sizes and surface chemistry is essential for fabricating high-quality zeolite membranes. This study aims to improve the performance of SSZ-13 membranes by tuning their pore structures using an occluded organic structure-directing agent (OSDA) through low-temperature hydrocracking. The resulting membranes demonstrated notable improvements in H<sub>2</sub>/CO<sub>2</sub> separation. Permeation tests indicated that the SSZ-13 zeolite membrane achieved a moderate H<sub>2</sub> permeance of 1.04 × 10<sup>−7</sup> mol Pa<sup>−1</sup> m<sup>−2</sup> s<sup>−1</sup>, along with a markedly improved H<sub>2</sub>/CO<sub>2</sub> ideal selectivity of 225 at 150 °C. Both H<sub>2</sub> and CO<sub>2</sub> permeances increased significantly through the membrane with increasing temperatures, suggesting an activated diffusion mechanism for their permeation. The activation energy for H<sub>2</sub> permeation was calculated to be as high as 8.98 kJ mol<sup>−1</sup>, suggesting that the membrane has a relatively small mean pore size and minimal defects. CO<sub>2</sub> adsorption and temperature-programmed desorption (TPD) analysis showed a pronounced interaction between CO<sub>2</sub> molecules and the SSZ-13 membrane, likely accounting for the exceptionally low CO<sub>2</sub> permeance observed. These SSZ-13 zeolite membranes demonstrate considerable potential for efficient H<sub>2</sub>/CO<sub>2</sub> separation in practical applications.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"387 ","pages":"Article 113518"},"PeriodicalIF":4.8,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163600","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

Surface chemical modulation of nitrogen-doped microporous carbon for efficient removal of H2S and CO2: The effect of nitrogen functionality

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-01-20 DOI: 10.1016/j.micromeso.2025.113517

Yongping Ma , Yan Xu , Fan Liu , Yankai Zhang , Jitong Wang

{"title":"Surface chemical modulation of nitrogen-doped microporous carbon for efficient removal of H2S and CO2: The effect of nitrogen functionality","authors":"Yongping Ma , Yan Xu , Fan Liu , Yankai Zhang , Jitong Wang","doi":"10.1016/j.micromeso.2025.113517","DOIUrl":"10.1016/j.micromeso.2025.113517","url":null,"abstract":"<div><div>The removal of hydrogen sulfide (H₂S) and carbon dioxide (CO₂) is of paramount importance for mitigating environmental pollution. However, due to the difficulty in accurately controlling the surface chemistry, the performance of carbon materials in the simultaneous removal of H₂S and CO₂ remains relatively limited. Herein, nitrogen-doped microporous carbon with well-developed pore structure was prepared through a combination of hydrothermal synthesis and molten salt method. The impact of nitrogen-doped surface chemistry on the removal performance for H₂S and CO₂ at room temperature was primarily studied. Owing to its abundant micropores and ultramicropores, the material possesses sufficient basic sites that can effectively remove CO₂. Pyrrolic nitrogen serves as the primary basic site during CO₂ adsorption, which exhibits an excellent CO₂ adsorption capacity of 136.97 mg CO₂/g. The high nitrogen content provides a strongly alkaline environment conducive to the dissociation of H₂S on the carbon surface, with pyrrolic nitrogen being the main basic site during the catalytic oxidation of H₂S. The large pore volume offers sufficient storage space for desulfurization products, enabling a sulfur capacity of 2.56 g H₂S/g. DFT calculations reveal that pyrrolic nitrogen undergoes the largest change in charge before and after the adsorption of CO₂ and H₂S, due to its strong adsorption effect on both gases. In the presence of both CO₂ and H₂S, competition for active sites leads to a decline in the removal performance for both gases. This work holds significant implications for the design of materials for the simultaneous removal of CO₂ and H₂S.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"387 ","pages":"Article 113517"},"PeriodicalIF":4.8,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163601","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

Shedding electrons on ADOR zeolite structures – Structure determination by 3DED

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-01-18 DOI: 10.1016/j.micromeso.2025.113514

Anna Laštovičková, Daniel N. Rainer, Michal Mazur

{"title":"Shedding electrons on ADOR zeolite structures – Structure determination by 3DED","authors":"Anna Laštovičková, Daniel N. Rainer, Michal Mazur","doi":"10.1016/j.micromeso.2025.113514","DOIUrl":"10.1016/j.micromeso.2025.113514","url":null,"abstract":"<div><div>Three-dimensional electron diffraction (3DED) offers a powerful alternative to single-crystal X-ray diffraction (SCXRD) for the structure determination of crystalline materials with small-sized crystals (usually nanometre-sized) or crystals with intergrowths, often produced during zeolite synthesis. ADOR is a synthesis strategy of novel daughter zeolites from well-known parent germanosilicates. Structure determination of such ADOR zeolites is challenging due to the presence of aggregated intergrowths, and often small-sized crystals. This work demonstrates the application of continuous rotation electron diffraction (cRED), a type of 3DED, for the rapid structural characterisation of zeolites produced by ADOR approach. cRED can be performed in a transmission electron microscope and the structure of a studied material can be obtained rapidly. We propose a unified workflow for the structure determination of ADOR daughter materials. This workflow involves the initial structural investigation and determination of the parent material, followed by the utilization of this knowledge to facilitate the subsequent structure determination of the daughter material. Investigation strategy was shown to be uniform, as presented for ADOR transformation of two different parent germanosilicates. This approach is a tool allowing prompt recognition of new ADOR zeolites at the early stage of their synthesis and can be used for a feedback-based optimisation of synthesis conditions.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"387 ","pages":"Article 113514"},"PeriodicalIF":4.8,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The support affects the catalytic conversion in thymol hydrogenation reaction

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-01-17 DOI: 10.1016/j.micromeso.2025.113507

Fateme Poorsharbaf Ghavi , Martin Kubů , Oleg Petrov , Monika Remzová , Subhajyoti Samanta , Jan Přech , Maksym Opanasenko

{"title":"The support affects the catalytic conversion in thymol hydrogenation reaction","authors":"Fateme Poorsharbaf Ghavi , Martin Kubů , Oleg Petrov , Monika Remzová , Subhajyoti Samanta , Jan Přech , Maksym Opanasenko","doi":"10.1016/j.micromeso.2025.113507","DOIUrl":"10.1016/j.micromeso.2025.113507","url":null,"abstract":"<div><div>Hydrogenation of the aromatic ring in phenolic compounds is an important reaction in industry and in the synthesis of fine chemicals. Pd-supported catalysts have proved to be highly active and efficient in deep hydrogenation of aromatic ring. Previous studies confirmed that the acidity and topology properties of the support play an important role in the efficient transformation of the phenolic reactant. In this study, we have investigated the effect of these two parameters by designing advanced layered MFI and MWW zeolites. To understand the effect of acidity, we compared the catalytic performance of a series of Pd/MFI catalysts that significantly differed in the acidity of the support. Then, we compared the catalytic results from Pd on aluminosilicate MFI and Pd/MCM-56 to see the effect of the support's topology. Thymol was used as a model phenolic reactant, and the results confirmed that not only the Pd on non-acidic MFI support was inactive (conversions below 25 %), but also the acidity of the MFI support led to higher thymol conversion (47 %), while more weak acid centers and silanol groups in dealuminated MFI topped up the outcome (100 % conversion). Data also showed that between two aluminosilicate supports, the MWW outperformed MFI (100 % vs. 47 %), due to its topology and morphology for better accommodating thymol and interacting with it.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"387 ","pages":"Article 113507"},"PeriodicalIF":4.8,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143162780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tailoring catalyst support with bicontinuous concentric lamellar morphology for dry reforming of methane

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-01-17 DOI: 10.1016/j.micromeso.2025.113511

Dian H. Wahyudi , Aishah A. Jalil , Muhammad A. Aziz , Abdul H. Hatta , Mohd H.M. Sofi , Nadiatus Silmi , Hermania E. Wogo , Nurul S. Hassan , Veinardi Suendo , Rino R. Mukti , Ismunandar

{"title":"Tailoring catalyst support with bicontinuous concentric lamellar morphology for dry reforming of methane","authors":"Dian H. Wahyudi , Aishah A. Jalil , Muhammad A. Aziz , Abdul H. Hatta , Mohd H.M. Sofi , Nadiatus Silmi , Hermania E. Wogo , Nurul S. Hassan , Veinardi Suendo , Rino R. Mukti , Ismunandar","doi":"10.1016/j.micromeso.2025.113511","DOIUrl":"10.1016/j.micromeso.2025.113511","url":null,"abstract":"<div><div>Since the utilization of greenhouse gases has been an important topic for the last decade, a great effort has been made to find a way to ameliorate this utilization. Dry reforming of methane (DRM) has gained much attention due to its ability to decrease greenhouse gas emissions and generate valuable syngas. In this study, unique material with bicontinuous concentric lamellar (<em>bcl</em>) morphology has been synthesized and employed as catalyst support for DRM reaction. Ni/<em>bcl</em>-Silica and Ni/<em>bcl</em>-AAs catalysts with <em>bcl</em> morphology were successfully synthesized and characterized using XRD, SEM, TEM, FTIR, N<sub>2</sub> adsorption, and CO<sub>2</sub>-TPD analysis. In the DRM reaction, the Ni/<em>bcl</em>-AAs catalyst demonstrated significantly better performance, achieving 90 % CH<sub>4</sub> selectivity and 77 % CO<sub>2</sub> conversion, compared to Ni/<em>bcl</em>-Silica. This superior performance is attributed to the <em>bcl</em> morphology, which provides a high surface area and improved accessibility of reactants to the active metal sites, thereby enhancing catalytic efficiency. Moreover, the presence of Al content in Ni/<em>bcl</em>-AAs composition can enhance the basicity of the Ni/<em>bcl</em>-AAs catalyst. The synergistic effect between the high surface area and basic sites resulted in a good performance in DRM reaction.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"387 ","pages":"Article 113511"},"PeriodicalIF":4.8,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163662","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

Insight into the role of meso-Y zeolites in CsPMo/meso-Y composites on the selective oxidation of sulfides enhancement

IF 4.8 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-01-16 DOI: 10.1016/j.micromeso.2025.113508

Chang Sun , Yutong Han , Yingzhen Wei , Zhong Zhang , Xiaohui Li , Guocheng Liu , Xiuli Wang

{"title":"Insight into the role of meso-Y zeolites in CsPMo/meso-Y composites on the selective oxidation of sulfides enhancement","authors":"Chang Sun , Yutong Han , Yingzhen Wei , Zhong Zhang , Xiaohui Li , Guocheng Liu , Xiuli Wang","doi":"10.1016/j.micromeso.2025.113508","DOIUrl":"10.1016/j.micromeso.2025.113508","url":null,"abstract":"<div><div>Polyoxometalates (POMs), renowned for their excellent catalytic activity, are widely used in oxidation reactions. Rational regulation of metal ion valence state of POMs is of great significance for the design and construction of highly active catalyst. In this work, we utilized mesoporous Y zeolite (meso-Y) as a host to load and disperse cesium phosphomolybdate (CsPMo) for selective oxidation of thioethers. The as-prepared CsPMo/meso-Y featured superior catalytic activity and recyclability. The electronic structures of the CsPMo/meso-Y were investigated by XPS and NMR spectra. The results indicated that embedding CsPMo into meso-Y caused electron transfer from CsPMo to meso-Y. Meanwhile, meso-Y could provide H<sup>+</sup> due to its abundant Brønsted acid sites. The simultaneous appearance of electron and H<sup>+</sup> facilitated the formation of Mo<sup>V</sup>, resulting in a higher oxidation of thioethers activity for the CsPMo/meso-Y. Radical scavenger experiments and Raman analysis indicated that peroxo-metal species derived from CsPMo and oxidizing agent tert-butyl hydroperoxide (TBHP) were the real catalyst. Mo<sup>V</sup> is more conducive to the formation of peroxo-metal species, causing the higher activity. This study provides a new insight into the role of meso-Y in CsPMo/meso-Y and a novel clue to regulate the valence states of metal ions of POMs to enhance catalytic performance of the polyoxometalate based catalysts.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"387 ","pages":"Article 113508"},"PeriodicalIF":4.8,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163598","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