Microporous and Mesoporous Materials最新文献_第6页

H/D exchange of ethane on In-modified BEA zeolite investigated by 1H MAS NMR 用1H MAS NMR研究了in改性BEA分子筛上乙烷的H/D交换

IF 4.7 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-08-21 DOI: 10.1016/j.micromeso.2025.113824

Sergei S. Arzumanov , Anton A. Gabrienko , Alexander V. Toktarev , Dieter Freude , Alexander G. Stepanov

引用次数: 0

Porous niobium-tantalum carbides composite as promising material via cost-effective processing 多孔铌钽碳化物复合材料是一种极具经济效益的材料

IF 4.7 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-08-21 DOI: 10.1016/j.micromeso.2025.113825

Svetlana V. Rempel , Albina A. Valeeva , Аleksandr V. Varaksin , Andrey A. Rempel

{"title":"Porous niobium-tantalum carbides composite as promising material via cost-effective processing","authors":"Svetlana V. Rempel , Albina A. Valeeva , Аleksandr V. Varaksin , Andrey A. Rempel","doi":"10.1016/j.micromeso.2025.113825","DOIUrl":"10.1016/j.micromeso.2025.113825","url":null,"abstract":"<div><div>NbC/NbTaC<sub>2</sub> nanocomposite with unique porous structure was prepared by carbidization by using electrochemical transport reactions. The chemical and phase composition, character of porosity, morphology, and pore size distribution were studied by using mass spectrometry, XRD, HRTEM, SEM, EBSD, and BET methods. The effect of high-temperature annealing on the porosity was considered. The powder consisted of spherical nanoparticles with internal cavities. The nanocomposite contained pores of various sizes and types. The main size of pores was about 13 nm. The agreement of the results obtained by different methods also confirms the correctness of the approximations used to study the porosity by the N<sub>2</sub> adsorption-desorption method. Synergetic effect of the precursors (including Ta) and preparation method on the development of unique mesopores plays a crucial role. Such type of porosity allows filling the nanocomposite with additional particles or molecules of various sizes. This paper proposes a convenient route to prepare unique porosity nanocomposites, which are capable to act as a matrix for introducing additional elements or gases, i.e. for synthesizing composites with new properties. Such nanocomposites can also act as an electrocatalyst and accumulator for gas storage.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"398 ","pages":"Article 113825"},"PeriodicalIF":4.7,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144891831","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

Function of tannin and droplet template in microfluidic system to synthesize carbon capsules for carbon dioxides capture: Promoting hierarchical porous structure and nitrogen content 单宁和液滴模板在微流控系统合成二氧化碳捕集碳胶囊中的作用：促进分层多孔结构和氮含量

IF 4.7 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-08-19 DOI: 10.1016/j.micromeso.2025.113819

Ruirui Zhang , Ziheng Jin , Xindi Xie , Jinlin He , Fengli Gan , Guangmei Cao , Xia Jiang

{"title":"Function of tannin and droplet template in microfluidic system to synthesize carbon capsules for carbon dioxides capture: Promoting hierarchical porous structure and nitrogen content","authors":"Ruirui Zhang , Ziheng Jin , Xindi Xie , Jinlin He , Fengli Gan , Guangmei Cao , Xia Jiang","doi":"10.1016/j.micromeso.2025.113819","DOIUrl":"10.1016/j.micromeso.2025.113819","url":null,"abstract":"<div><div>Nitrogen(N)-doped porous carbon is one of the most efficient materials for carbon dioxide (CO<sub>2</sub>) capture, but its synthetic techniques face certain limitations in the synergy of N doping and pore formation. This study proposes a simple microfluidic approach to synthesize N-doped porous carbon capsules (CCs) using chitosan (CTS) as bio-carbon and N precursor, with tannin serving as N-doping promoter by enabling amination reaction with CTS through droplet-templated pore-forming strategy. Compared to CCs synthesized without droplet templates and tannin, the optimum sample showed a developed hierarchical pore structure, with micropore volume increasing from 0.155 cm<sup>3</sup>/g to 0.26 cm<sup>3</sup>/g. Moreover, the optimum sample exhibited increased micropore and mesopore volumes, and the N content rose from 2.46 at.% to 3.67 at.% simultaneously, the corresponding CO<sub>2</sub> uptake amount raised from 1.03 mmol/g to 1.40 mmol/g. Compared to the sample without tannin, the optimized sample exhibits a breakthrough adsorption capacity that is 1.13 times higher. These results demonstrated that, owing to its crosslinking with surfactant Pluronic® F127 and inhibitory effect on N-containing compound release, tannin enhances <em>in-situ</em> N incorporation in CTS to increase surface N content, and synergistically with droplet-template improve hierarchical pore structure of CCs. This work provides a facile approach for N-doped porous bio-carbon applicable to CO<sub>2</sub> capture.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"398 ","pages":"Article 113819"},"PeriodicalIF":4.7,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144886594","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

Engineering bipedal Janus nanocarriers: Dual-targeting and pH/microwave-responsive drug delivery system for cancer therapy 工程双足Janus纳米载体：用于癌症治疗的双靶向和pH/微波响应药物递送系统

IF 4.7 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-08-18 DOI: 10.1016/j.micromeso.2025.113820

Rong Wang , Xiaodan Kong

{"title":"Engineering bipedal Janus nanocarriers: Dual-targeting and pH/microwave-responsive drug delivery system for cancer therapy","authors":"Rong Wang , Xiaodan Kong","doi":"10.1016/j.micromeso.2025.113820","DOIUrl":"10.1016/j.micromeso.2025.113820","url":null,"abstract":"<div><div>The development of intelligent platforms capable of precisely targeting cancer cells while minimizing toxic side effects on normal tissues remains a significant challenge in medical applications. This study proposes a structurally innovative bipedal Janus nanocarrier (Fe<sub>3</sub>O<sub>4</sub>@TiO<sub>2</sub>&dmSiO<sub>2</sub>/FA) for intelligent drug delivery. The architecture integrates magnetic-responsive and microwave (MW)-responsive Fe<sub>3</sub>O<sub>4</sub>@TiO<sub>2</sub> (core@shell) components with anisotropicly grown bipedal mesoporous silica (dmSiO<sub>2</sub>), the latter being modified with folic acid (FA) targeting ligands. This design achieves dual-mode tumor targeting by concurrently enabling FA-mediated active recognition and magnetic field-guided navigation. The system demonstrates drug release behavior orchestrated through the synergistic interplay between endogenous tumor microenvironmental stimuli (pH 5.3) and exogenous MW irradiation. MTT assays revealed that doxorubicin-loaded nanocarriers exhibit significant cytotoxicity under MW exposure, achieving over 80 % proliferation inhibition in multiple cancer cell lines. These results position this nanocarrier as a promising candidate for effective cancer therapy.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"398 ","pages":"Article 113820"},"PeriodicalIF":4.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893472","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

Peculiar activity of H-Na-mordenite in the N2O abatement with CH4: in situ and operando FTIR study h - na -丝光沸石在CH4减排N2O中的特殊活性：原位和操作FTIR研究

IF 4.7 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-08-14 DOI: 10.1016/j.micromeso.2025.113818

Maria Cristina Campa , Simone Morpurgo , Giulia Luccisano , Michele Leone , Daniela Pietrogiacomi

{"title":"Peculiar activity of H-Na-mordenite in the N2O abatement with CH4: in situ and operando FTIR study","authors":"Maria Cristina Campa , Simone Morpurgo , Giulia Luccisano , Michele Leone , Daniela Pietrogiacomi","doi":"10.1016/j.micromeso.2025.113818","DOIUrl":"10.1016/j.micromeso.2025.113818","url":null,"abstract":"<div><div>The catalytic reduction of N<sub>2</sub>O with CH<sub>4</sub> in the absence (CR<sub>N2O</sub>) and in the presence of excess O<sub>2</sub> (SCR<sub>N2O</sub>) were studied on H-NaMOR catalysts (H-exchange degree within the range 0–100 %) prepared from Na-MOR (Si/Al = 9.2) by ion-exchange method. The catalytic measurements were performed in a flow apparatus with GC analysis of reactants and products. <em>In situ</em> FTIR characterization and catalytic results combined with <em>operando</em> FTIR experiments gave an insight into the active sites for N<sub>2</sub>O abatement and into the reaction pathway.</div><div>H-NaMOR catalysts were active for both CR<sub>N2O</sub> and SCR<sub>N2O</sub>, but inactive for N<sub>2</sub>O decomposition and CH<sub>4</sub> combustion. The activity shows a complex dependence on the H-exchange degree. The active sites involved in the N<sub>2</sub>O reduction are very likely generated by dehydration of pairs of protonated acid sites. Active sites having a specific location are related to the catalytic activity, specifically those located in E sites to CR<sub>N2O</sub> and those in D sites to SCR<sub>N2O</sub>. For both CR<sub>N2O</sub> and SCR<sub>N2O</sub> the protonation of A sites lowers the activity. The catalytic results combined with <em>operando</em> FTIR characterization suggest that CH<sub>4</sub> and N<sub>2</sub>O cannot be activated separately, but a synergetic activation of N<sub>2</sub>O and CH<sub>4</sub> molecules occurs on a bifunctional active site. <em>Operando</em> FTIR indicated formaldehyde-like species as possible reaction intermediates, as well as the formation of other CH<sub>x</sub>O<sub>y</sub> species which poison the catalyst in CR<sub>N2O</sub> conditions but are easily oxidized in the presence of O<sub>2</sub> during the SCR<sub>N2O</sub>.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"398 ","pages":"Article 113818"},"PeriodicalIF":4.7,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144886583","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

CO2 adsorption on polyethyleneimine -modified mesocellular siliceous foam: Influence of glycerol-based additives 聚乙烯亚胺改性介孔硅质泡沫对CO2吸附的影响

IF 4.7 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-08-13 DOI: 10.1016/j.micromeso.2025.113816

R.R. Dirgarini Julia Nurlianti Subagyono , Alan L. Chaffee

{"title":"CO2 adsorption on polyethyleneimine -modified mesocellular siliceous foam: Influence of glycerol-based additives","authors":"R.R. Dirgarini Julia Nurlianti Subagyono , Alan L. Chaffee","doi":"10.1016/j.micromeso.2025.113816","DOIUrl":"10.1016/j.micromeso.2025.113816","url":null,"abstract":"<div><div>This study investigates the effects of glycerol and glycerol carbonate as adjuvants on the CO<sub>2</sub> adsorption of polyethyleneimine (PEI)-functionalized mesocellular siliceous foam (MCF), with a focus on post-combustion carbon capture applications. Material characterisation demonstrated the successful incorporation of PEI-adjuvant blends into MCF, with notable pore filling identified via nitrogen sorption analysis and indications of chemical interactions revealed through infrared spectroscopy. The evaluation of CO<sub>2</sub> adsorption for the materials was conducted under both dry and humid conditions at temperatures ranging from 75 to 115 °C. The branched PEI-glycerol composites showed a 49 % enhancement in CO<sub>2</sub> uptake at 75 °C in humid CO<sub>2</sub>, indicating a synergistic interaction between glycerol and water. Adjuvants modestly enhanced the adsorption and desorption kinetics at low CO<sub>2</sub> concentrations and temperatures, especially within branched PEI systems. Yet the inclusion of adjuvants typically reduced CO<sub>2</sub> uptake and amine efficiency. Cycling experiments demonstrated a decline in performance and a gradual loss of mass, particularly at 115 °C, presumably resulting from the migration of PEI to the particle surface followed by thermal decomposition. Adjuvants provide kinetic advantages; however, their effects on stability necessitate additional optimisation to achieve a balance between performance and durability in practical applications.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"398 ","pages":"Article 113816"},"PeriodicalIF":4.7,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144879361","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

Small-angle neutron scattering studies of porous media: Assessment of liquid and gas as contrast-matching fluids using carbon aerogel 多孔介质的小角中子散射研究：用碳气凝胶评价液体和气体作为对比匹配流体

IF 4.7 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-08-13 DOI: 10.1016/j.micromeso.2025.113814

Phung Nhu Hao Vu , Andrzej P. Radlinski , Tomasz Blach , Liliana de Campo , Ralf Schweins , John Daniels , Klaus Regenauer-Lieb

{"title":"Small-angle neutron scattering studies of porous media: Assessment of liquid and gas as contrast-matching fluids using carbon aerogel","authors":"Phung Nhu Hao Vu , Andrzej P. Radlinski , Tomasz Blach , Liliana de Campo , Ralf Schweins , John Daniels , Klaus Regenauer-Lieb","doi":"10.1016/j.micromeso.2025.113814","DOIUrl":"10.1016/j.micromeso.2025.113814","url":null,"abstract":"<div><div>Contrast-matching (CM) small-angle neutron scattering (SANS) experiments have gained popularity due to their ability to assess and characterise porous media, as well as the interactions between penetrating fluids and solid matrix. This study evaluates the differences in performance between two commonly used fluids—CD<sub>4</sub> and H<sub>2</sub>O/D<sub>2</sub>O mixtures—in a CM SANS study using carbon aerogel, a material known for its homogeneous, inert, and tunable structure. For CM SANS experiments employing H<sub>2</sub>O/D<sub>2</sub>O mixtures, the sample preparation process is critical to achieving thorough pore saturation. At the scale of ∼5 nm, corresponding to the dominant pore size in the aerogel, CM SANS data for both CD<sub>4</sub> and H<sub>2</sub>O/D<sub>2</sub>O exhibit near-ideal two-phase solid-fluid behaviour, indicating good accessibility of pores and minimal fluid condensation in confinement. At larger scales (around 125 nm), however, CM SANS results using pressurised CD<sub>4</sub> deviate from the two-phase model. This deviation is consistent with an increase in porosity under pressure, attributed to elastic deformation of the solid matrix at length scales beyond the range investigated by SANS. Notably, this effect is absent if H<sub>2</sub>O/D<sub>2</sub>O mixtures are used as CM fluid, and should, therefore, be considered when conducting CM SANS experiments with high-pressure CD<sub>4</sub>. These findings offer valuable insights into the suitability of penetrating fluids in CM SANS experiments and highlight the remarkable elasticity of the carbon aerogel matrix, which reliably returns to its original state even after undergoing significant structural deformation.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"399 ","pages":"Article 113814"},"PeriodicalIF":4.7,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145005323","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

Proof-of-concept study of magnesium and ciprofloxacin-loaded zeolite incorporated into dental composites 镁和环丙沙星负载沸石纳入牙科复合材料的概念验证研究

IF 4.7 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-08-12 DOI: 10.1016/j.micromeso.2025.113817

Zuzanna Buchwald , Aleksandra Domke , Marcel Jakubowski , Katarzyna Staszak , Wojciech Smułek , Mutlu Özcan , Adam Voelkel , Mariusz Sandomierski

{"title":"Proof-of-concept study of magnesium and ciprofloxacin-loaded zeolite incorporated into dental composites","authors":"Zuzanna Buchwald , Aleksandra Domke , Marcel Jakubowski , Katarzyna Staszak , Wojciech Smułek , Mutlu Özcan , Adam Voelkel , Mariusz Sandomierski","doi":"10.1016/j.micromeso.2025.113817","DOIUrl":"10.1016/j.micromeso.2025.113817","url":null,"abstract":"<div><div>A magnesium-based zeolite filler (Mg-X) was prepared and loaded with the antibiotic ciprofloxacin (Mg-X-CF) to enhance resin-based composites (RBCs). The fillers were characterized using scanning electron microscopy, X-ray diffraction, nitrogen adsorption isotherms, FTIR microscopy, and thermogravimetric analysis, confirming the effectiveness of both preparation steps. These zeolites were then incorporated as fillers (65 % vol., 48–49 % wt.) into light-cured RBCs. Two composite formulations were examined—one without CF (Mg-X-c) and one containing CF (Mg-X-CF-c). Key properties were assessed, including degree of conversion (DC), depth of cure (DOC), polymerization shrinkage (PS), compressive (CS) and flexural strength (FS), water sorption (SP), solubility (SL), magnesium ion release, surface roughness, and antibacterial activity against Staphylococcus aureus and Escherichia coli.</div><div>Mg-X-c and Mg-X-CF-c showed high DC at the surface: 67.36 ± 3.48 % and 68.37 ± 4.72 %, slightly decreasing at 2 mm depth to 65.40 ± 2.60 % and 68.51 ± 2.71 %, and significantly dropped to 5.98 ± 2.71 % and 14.78 ± 3.94 % at the bottom. DOC reached 2.14 ± 0.04 mm and 1.93 ± 0.07 mm; PS was 4.40 ± 0.20 % and 4.27 ± 0.28 %; CS was 226.30 ± 9.55 MPa and 208.21 ± 12.41 MPa; FS was 59.18 ± 5.79 MPa and 58.26 ± 5.97 MPa; SP was 52.7 ± 3.3 and 58.1 ± 4.8 μg mm<sup>−3</sup>; SL was −4.0 ± 1.3 and 4.2 ± 0.9 μg mm<sup>−3</sup>, respectively. Both composites released Mg<sup>2+</sup> for over 28 days. Their surface roughness (RMS) was beneficially below 0.2 μm. Antibacterial activity was observed against <em>S. aureus</em> (Mg-X-CF-c) and <em>E. coli</em> (both composites). Ciprofloxacin retained its antibacterial properties within the composite and conferred them to the material, while only slightly affecting its physicochemical properties.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"398 ","pages":"Article 113817"},"PeriodicalIF":4.7,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144841763","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

High-shear stirring assisted synthesis of Ni nanoparticles confined in H-ZSM-5 for hydrodeoxygenation of palmitic acid 高剪切搅拌辅助合成Ni纳米颗粒限制在H-ZSM-5中用于棕榈酸的加氢脱氧

IF 4.7 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-08-12 DOI: 10.1016/j.micromeso.2025.113813

Yan Hu , Chenqi Zhang , Xuancheng Zhou , Ji Liu , Xin Xiao , Wanglai Cen , Shengwei Tang , Quan Zhu , Yan Wang

{"title":"High-shear stirring assisted synthesis of Ni nanoparticles confined in H-ZSM-5 for hydrodeoxygenation of palmitic acid","authors":"Yan Hu , Chenqi Zhang , Xuancheng Zhou , Ji Liu , Xin Xiao , Wanglai Cen , Shengwei Tang , Quan Zhu , Yan Wang","doi":"10.1016/j.micromeso.2025.113813","DOIUrl":"10.1016/j.micromeso.2025.113813","url":null,"abstract":"<div><div>In this study, H-ZSM-5 molecular sieves loaded with metallic Ni are successfully synthesized by high-shear stirring assisted in situ precipitation encapsulation method. During the synthesis process, the nickel complexes synergize with zeolite precursor solution to combine Ni species with molecular sieve skeleton via a self-assembly strategy, which result in the formation of molecular sieve-limited nano-sized Ni clusters (with the size of about 12 nm) after calcination and reduction in H<sub>2</sub>/N<sub>2</sub> atmosphere. The high dispersion and small size of Ni species in the ZSM-5 skeleton are confirmed by a series of experimental characterizations. Palmitic acid is used as a model compound to evaluate the performance of the catalyst for the hydrodeoxygenation reaction of long-chain fatty acids, and the results show that the Ni clusters in the confined domain of the molecular sieve significantly inhibit the metal migration and sintering due to the spatial confinement effect of the skeleton, and exhibit higher catalytic activity (89 %) and stability in the reaction compared with the surface-loaded Ni nanoparticles. This study provides a new strategy for the design of metal-zeolite catalysts with high catalytic activity, which has potential applications especially in the preparation of aviation paraffin from bio-oil.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"398 ","pages":"Article 113813"},"PeriodicalIF":4.7,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144852094","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

A thermally stable Cr-doped UiO-66 supported Zn-Cr catalyst for the oxidative dehydrogenation of propane with CO2 at low temperature: Catalytic activity and kinetic modeling 低温下丙烷氧化脱氢的热稳定掺铬UiO-66负载Zn-Cr催化剂：催化活性和动力学建模

IF 4.7 3区材料科学

Microporous and Mesoporous Materials Pub Date : 2025-08-12 DOI: 10.1016/j.micromeso.2025.113815

Hossein Samadi, Majid Taghizadeh, Hanieh Habibpoor

{"title":"A thermally stable Cr-doped UiO-66 supported Zn-Cr catalyst for the oxidative dehydrogenation of propane with CO2 at low temperature: Catalytic activity and kinetic modeling","authors":"Hossein Samadi, Majid Taghizadeh, Hanieh Habibpoor","doi":"10.1016/j.micromeso.2025.113815","DOIUrl":"10.1016/j.micromeso.2025.113815","url":null,"abstract":"<div><div>This research focused on the low-temperature oxidative dehydrogenation of propane by CO<sub>2</sub> (ODHP-CO<sub>2</sub>) using zinc-promoted chromium nanoparticles supported on Cr-doped UiO-66. A Cr-doped UiO-66 metal-organic framework was synthesized by a hydrothermal reaction, and Cr/UiO-66(Cr) composites with different mass percentages of Cr were developed by the co-precipitation method. In addition, zinc was applied as a promoter by the impregnation method. The characteristics of the synthesized catalysts were determined by XRD, BET, FE-SEM, EDS-dot mapping, FT-IR, NH<sub>3</sub>-TPD, and TGA. Catalytic performance tests for ODHP-CO<sub>2</sub> were conducted in a fixed-bed reactor at temperatures of 350, 400 and 450 °C, under atmospheric pressure, a C<sub>3</sub>H<sub>8</sub>/CO<sub>2</sub> molar ratio of 1, and a WHSV ranging from 0.27 to 1.62 h<sup>−1</sup>. As a result, the 2 %Zn–5 %Cr/UiO-66(Cr) catalyst achieved a propylene selectivity of 75.5 % and a propane conversion of 18.7 % at a temperature of 450 °C, C<sub>3</sub>H<sub>8</sub>/CO<sub>2</sub> molar ratio of 1, and WHSV of 0.27 h<sup>−1</sup> after 8 h of reaction time. Furthermore, kinetic modeling of ODHP-CO<sub>2</sub> was also performed, using the Langmuir-Hinshelwood mechanism to calculate the kinetic parameters. According to this mechanism, the apparent activation energy was calculated to be 12.34 kJ mol<sup>−1</sup>.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"398 ","pages":"Article 113815"},"PeriodicalIF":4.7,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144841839","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