Microporous and Mesoporous Materials最新文献

{"title":"Optimizing H-B-ZSM-5 catalyst for efficient methanol-to-propylene conversion via precise control of NaOH-TPABr interaction","authors":"Marzieh Hamidzadeh ,&nbsp;Mohadese Nazari ,&nbsp;Solmaz Shifteh ,&nbsp;Ali Abdolali","doi":"10.1016/j.micromeso.2024.113344","DOIUrl":"10.1016/j.micromeso.2024.113344","url":null,"abstract":"<div><div>This study investigates the effects of boron (B) and crucial interplay between NaOH and TPABr during the synthesis of seed-induced H-B-ZSM-5 for designing effective MTP catalysts. Various characterization techniques were employed to examine the impact of these factors on the physiochemical properties of the synthesized catalysts. The findings reveal that boron incorporation leads to an 81 % increase in catalyst stability and a 5.5 % increase in selectivity to light olefins. A critical interplay between NaOH concentration and TPABr content was also found in optimizing crystallinity, morphology, acidity and surface area. The crystallinity, Al distribution homogeneity, and average pore size initially increase before decreasing with increasing NaOH concentration. The research highlights the pivotal role of TPABr, which interacts with NaOH to profoundly impact catalyst performance. The synthesized catalyst H-B-ZSM-5, prepared with TPABr/20SiO₂ = 0.65 and Na₂O/20SiO₂ = 1.69, exhibits excellent performance, achieving 99 % conversion and 83 % light olefin selectivity with minimal byproduct formation during a 170-h test at a high WHSV_methanol equal to 8 h⁻¹.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"381 ","pages":"Article 113344"},"PeriodicalIF":4.8,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142318539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Understanding the adsorption mechanism of carbon dioxide capture on hybrid zeolites prepared from rice husk ash via a modified statistical physics model","authors":"Mohamed Bouzid ,&nbsp;Lotfi Sellaoui ,&nbsp;Mounir Ben El Hadj Rhouma ,&nbsp;Adrian Bonilla-Petriciolet ,&nbsp;Abdelmottaleb Ben Lamine","doi":"10.1016/j.micromeso.2024.113346","DOIUrl":"10.1016/j.micromeso.2024.113346","url":null,"abstract":"<div><div>In this study, a modified advanced double-layer model based on statistical physics was developed and utilized to explore the adsorption of carbon dioxide (CO₂) on two zeolites: W-ZSM-5 and W-silicalite-1. This model was formulated assuming that different chemical potentials were involved in the interfacial phenomenon, in contrast to other double-layer models that consider only one chemical potential. This formulation provides a better understanding of the multilayer adsorption of gases. The results obtained from this new model indicate that in the case of the CO₂-W-ZSM-5 system, CO₂ molecules altered their adsorption orientation from a mixed orientation (n = 0.88) involving both parallel and non-parallel configurations. Similarly, the molecules shifted from a multimolecular orientation (n = 1.17) to a perpendicular orientation for CO₂ adsorption on the W-silicalite-1 surface. The calculated adsorption energies confirmed the presence of an exothermic adsorption process governed by physical interactions between the CO₂ molecules and the surfaces of these zeolites. Finally, the adsorption energy distribution (AED) of both adsorbent surfaces was analyzed to determine the energy band activated during the CO₂ capture process. These findings contribute to a deeper understanding of CO₂ adsorption on zeolite surfaces. This new statistical physics model can be used for the process design of gas adsorption systems in various applications.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"381 ","pages":"Article 113346"},"PeriodicalIF":4.8,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Solvent-free synthesis of hierarchical tungsten-doped MFI zeolite for cyclohexene epoxidation reaction","authors":"Guojun Lv ,&nbsp;Hao Ruan ,&nbsp;Xuyang Zou ,&nbsp;Yan Chen ,&nbsp;Xubin Zhang ,&nbsp;Fumin Wang","doi":"10.1016/j.micromeso.2024.113345","DOIUrl":"10.1016/j.micromeso.2024.113345","url":null,"abstract":"<div><div>Solvent-free synthesis method in zeolite preparation can largely decrease the generation of wastewater and improve the zeolite yield by simply grinding and hydrothermal treatment for the solid raw materials, and accordingly is considered as one of the most promisingly green and sustainable synthesis strategy for the metal-doped zeolite materials. However, there are scarcely any reports on the solvent-free synthesis and catalytic application of tungsten-doped zeolite materials. In this work, tungsten-doped MFI zeolites were prepared with solvent-free synthesis method and used as heterogeneous catalyst for cyclohexene epoxidation reaction. The synthesized tungsten-doped MFI zeolites displayed a monoclinic (P21/n) space group attributed to the successful incorporation of tungsten atom into MFI framework and meanwhile possessed an enormous number of irregular mesopores ranging from 2 nm to 50 nm. The influence of TPAOH addition amount on the mesopore structure and properties of tungsten-doped MFI zeolite was further investigated. In addition, the crystallization process of tungsten-doped MFI zeolite sample was tracked and analyzed with SEM, XRD and BET characterizations, and accordingly possible formation process for hierarchical zeolite was proposed. Furthermore, the prepared hierarchical tungsten-doped MFI zeolite displayed eminent cyclohexene epoxidation performance and re-usability for more than five times. This work provides some guidance for the solvent-free synthesis of metallosilicate zeolites, decreasing the generation of wastewater and improving the zeolite yield.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"381 ","pages":"Article 113345"},"PeriodicalIF":4.8,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142318540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two birds with one stone: A ferrocene-based zirconium(IV)-organic framework nanosheet denoting intrinsic high proton conductivity and acting as a fine dopant to chitosan-based composite membranes","authors":"Yu-Ling Hong ,&nbsp;Lu-Lu Kang ,&nbsp;Bingbing Li ,&nbsp;Zhi-Qiang Shi ,&nbsp;Zifeng Li ,&nbsp;Gang Li","doi":"10.1016/j.micromeso.2024.113342","DOIUrl":"10.1016/j.micromeso.2024.113342","url":null,"abstract":"<div><div>Recently, it was demonstrated that employing metal-organic frameworks (MOFs) with prominent proton conductivity (σ) as fillers with organic substrates such as chitosan (CS) or Nafion is an effective approach for preparing composite membranes (CMs) with outstanding functionalities. Inspired by this, one extremely stable Zr(IV)-MOF (namely <strong>Zr-FDC</strong>) with a nanosheet structure produced by 1,1′-ferrocene dicarboxylic acid (H₂FDA) was successfully manufactured in this research and subsequently used as a filler to synthesize a series of CS-based CMs <em>via</em> casting method. The alternating current (AC) impedance determinations manifested that both <strong>Zr-FDC</strong> and the related CS-based CMs (<strong>CS/MOF-x</strong>; x = 2, 4, 6, 8 being the mass percentage of Zr-MOF in the CM) showed ultrahigh σ values, indicating the structural advantages of the Zr-MOF. Further research verified that when the MOF doping quantity is 4 %, the CM's (<strong>CS/MOF-4</strong>) σ is the greatest, being 2.22 × 10⁻² S/cm, which is boosted by nearly tenfold at 100 °C and 98 % relative humidity (RH) compared to the original MOF (3.2 × 10⁻³ S/cm). Furthermore, the CM exhibits superior thermal stability and tensile resistance. Finally, considering the structural features of the MOF and CS, activation energy data, and other determinations, we thoroughly theorized the proton conduction process within the MOF framework and CMs, referencing the subsequent proton exchange membrane design.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"381 ","pages":"Article 113342"},"PeriodicalIF":4.8,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142309736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced phosphate adsorption using Zr-Al and Ce-Al binary oxide nanoparticles","authors":"Junxue Li,&nbsp;Lingyi Li,&nbsp;Shengnan Zhang,&nbsp;Wei Cheng","doi":"10.1016/j.micromeso.2024.113341","DOIUrl":"10.1016/j.micromeso.2024.113341","url":null,"abstract":"<div><p>In addressing eutrophication resulting from phosphate accumulation, multi-metallic oxides often outperform single-metallic oxides in phosphate adsorption capacity. While alumina is abundant, its stability in acidic or alkaline environments is limited. Contrastingly, zirconium and cerium oxides demonstrate superior acid and base resistance, alongside specific phosphate affinity. This study focuses on the synthesis of Zr-Al and Ce-Al binary oxide nanoparticles through a sol-gel approach for phosphate removal from aqueous solutions, evaluating their efficiency through batch experiments. By judiciously adjusting the Zr/Al and Ce/Al ratios, binary oxide nanoparticles with distinct structures, grain sizes, surface characteristics, and phosphate adsorption properties were fabricated. Results indicate that Zr(3)Al(10) and Ce(3)Al(10) nanoparticles exhibit optimal phosphate adsorption properties among Zr-Al binary oxide variants and Ce-Al binary oxide counterparts, respectively. Kinetic data conform to the pseudo-second-order model for phosphate adsorption on Zr(3)Al(10) and Ce(3)Al(10), while equilibrium adsorption isotherms align with the Langmuir model. Phosphate adsorption capacities reached 83 mg/g for Zr(3)Al(10) and 210 mg/g for Ce(3)Al(10), positioning them as potent adsorbents. Coexisting anions minimally influence phosphate adsorption on Zr(3)Al(10) and Ce(3)Al(10) nanoparticles, indicating high selectivity towards phosphate, whereas Ca²⁺ and Mg²⁺ ions notably enhance phosphate adsorption. Mechanistically, phosphate adsorption on both nanoparticles follows electrostatic attraction, ligand exchange, and inner-sphere complexation, with surface-OH groups playing a pivotal role. Leveraging the advantageous properties of their parent materials, Zr-Al and Ce-Al binary oxide adsorbents exhibit synergistic effects, enhancing their potential for phosphate removal.</p></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"381 ","pages":"Article 113341"},"PeriodicalIF":4.8,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142260088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rapid and efficient carbon dioxide capture through benzene-1,4-diamine based hierarchical porous hyper-cross-linked polymers","authors":"Isham Areej ,&nbsp;Saqlain Raza ,&nbsp;Rimsha Khalid ,&nbsp;Faiza Ashraf ,&nbsp;Amin Abid ,&nbsp;Izan Izwan Misnon ,&nbsp;Bien Tan","doi":"10.1016/j.micromeso.2024.113340","DOIUrl":"10.1016/j.micromeso.2024.113340","url":null,"abstract":"<div><p>Carbon dioxide (CO₂) emission causes global warming which has been the greatest challenge for humanity since last decade. Herein, we developed nitrogen and phosphorus rich hyper cross-linked polymers for CO₂ capture, designated as BDA-HCP-1 and BDA-HCP-2 (benzene-1,4-diamine based hyper cross-linked polymers) having BET surface area 294.5904 m²g^-1 and 519.6918 m²g^-1 respectively^. The pore width range of BDA-HCP-1 and BDA-HCP-2 is 0–25 nm and 0–15 nm and pore volume of BDA-HCP-1 and BDA-HCP-2 is 0.01–0.18cm³/g and 0.01–0.25 cm³/g, respectively.Total pore volume, studied using DFT, is 0.20100 cm³/g for BDA-HCP-1 and 0.27973 cm³/g for BDA-HCP-2. BJH cumulative pore volume of BDA-HCP-1 is 0.113023 cm³/g and BDA-HCP-2 is 0.284733 cm³/g. The BDA-HCP-1and BDA-HCP-2 were synthesized by replacement of chlorines of hexachlorocyclophosphazenes (HCCP) and phosphorousdichlorophosphazenes (PDCP) with bezene-1,4-diamine to form linear and cyclic polyphosphazenes, which are later cross-linked through Friedal crafts reaction to form hyper cross-linked polymers. The maximum CO₂ adsorption quantity of BDA-HCP-1 is 48.62 cm³/g (CO₂ weight adsorbed 9.070 % with equilibrium time 8.16 min) at 273K/1 bar and 37.96 cm³/g (weight adsorbed 7.15 % with equilibrium time 8.25 min) at 298K/1 bar that gives adsorption capacity of 2.14 mmol/g and 1.69 mmol/g, respectively. Adsorption capacity of BDA-HCP-2 is 2.30 mmol/g and 2.13 mmol/g at 273 K/1 bar and 298 K/1 bar respectively. It is calculated from maximum CO₂ adsorption quantity of 51.6 cm³/g (weight adsorbed 9.83 % with equilibrium time 11.4 min, at 273 K/1 bar) and 47.7 cm³/g (weight adsorbed 9.25 % with equilibrium time 8.45 min, at 298 K/1 bar) respectively. Both BDA-HCPs can be reused with minor loss in adsorption capacity (2 and 1 %), which makes them excellent candidates to use on industrial scale applications. Adsorption isotherm study (Langmuir, Freundlich, and Temkin) and Kinetics study (pseudo first order and pseudo second order) reveals that this study fit best for Freundlich isotherms and pseudo first order kinetic model for both BDA-HCPs. This research contributes valuable insights into the design of hyper cross-linked materials with high surface area, good pore volume, excellent thermal stability and promising gas adsorption capacities particularly for addressing environmental pollution challenges related to CO₂ emissions.</p></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"381 ","pages":"Article 113340"},"PeriodicalIF":4.8,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142243818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Porphyrin-based schiff-base and aminal nitrogen-rich porous organic polymers for capture of SO2 and CO2","authors":"Lingmei Jiang ,&nbsp;Feng Bao ,&nbsp;Yunxuan Peng ,&nbsp;Zunshuang Zhao ,&nbsp;Yanting Wang ,&nbsp;Yuzhu Song ,&nbsp;Jiyang Li ,&nbsp;Kang Lv ,&nbsp;Jian Zhang ,&nbsp;Kuanyu Yuan","doi":"10.1016/j.micromeso.2024.113338","DOIUrl":"10.1016/j.micromeso.2024.113338","url":null,"abstract":"<div><p>Due to its serious hazards to human health and the environment, the deep removal of sulfur dioxide (SO₂) has been of great significance. Thus, it is critical to develop high efficient SO₂ capture and sequestration materials in gas purification process. Herein, we reported two novel prophyrin-based nitrogen-rich porous organic polymers (POPs), PrPOA-BP and PrPSN-BP, constructed through the simple catalyst-free condensation reaction. Owing to the strong affinity to SO₂ from the conjugate-electron macrocycles structure of prophyrin and nitrogen-rich porous networks, also the high porous structure, these two POPs demonstrated excellent SO₂ capture and separation performance with the adsorption uptakes up to 18.2 mmol g⁻¹ (273 K, 1 bar), 13.3 mmol g⁻¹ (298 K, 1 bar), 1.68 mmol g⁻¹ (298 K, 0.01 bar). This very competitive performance has far exceeded most of the prior reported nanoporous materials. Meanwhile, the IAST selectivities of SO₂/CO₂ (10/90, v/v) could reach 107.8 and 72.0 at 273 and 298 K, 1 bar. This study represents a new type prophyrin-based POPs materials and confirms the intrinsic potential for high efficiency SO₂ capture and sequestration.</p></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"381 ","pages":"Article 113338"},"PeriodicalIF":4.8,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142272357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Green catalytic oxidation of ethylbenzene to acetophenone over modified TS-1 zeolite supported cobalt oxide","authors":"Zhimei Song ,&nbsp;Jinhong Li ,&nbsp;Kaikai Cui ,&nbsp;Mei Han ,&nbsp;Dan Fang ,&nbsp;Chang Cai ,&nbsp;Nan Zhao ,&nbsp;Jinge Wang ,&nbsp;Lidong Chen","doi":"10.1016/j.micromeso.2024.113337","DOIUrl":"10.1016/j.micromeso.2024.113337","url":null,"abstract":"<div><p>The development of catalysts and processes with high activity, good selectivity and easy reproducibility and regeneration is the core of the solution for the oxidation of ethylbenzene to acetophenone. In this paper, the catalyst of cobalt metal oxide supported on TS-1 zeolite co-modified by alkali treatment and titanium silicon composite oxide was prepared. The catalysts were characterized by XRD, Raman, N₂ adsorption-desorption, SEM, TEM, XPS, FT-IR and UV–vis techniques to establish the correlation between physical and chemical properties and catalytic performance. Among the prepared catalysts, SiO₂ and TiO₂ co-coated TS-1 supported 3.75 wt % Co₃O₄ catalyst showed better oxidation activity. Under the optimized reaction conditions: T = 80 °C, t = 8 h, m_cat = 0.03 g, <em>n</em>EB: <em>n</em>HAC: <em>n</em>KBr: <em>n</em>H₂O₂ = 1 : 21: 0.1 : 16, the conversion of ethylbenzene was as high as 86.7 % and the selectivity of acetophenone was 85.6 %. After repeated tests, it showed good cycle and regeneration reaction performance. The high activity of this catalyst is attributed to the synergistic effect of cobalt oxide and TS-1 zeolite, and the mesoporous structure of titanium-silicon composite oxide is conducive to the adsorption and diffusion of reactants, intermediates and products.</p></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"381 ","pages":"Article 113337"},"PeriodicalIF":4.8,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142260126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Phosphonitrilic-derived graphynes as promising adsorbents of greenhouse gases","authors":"Andrzej Szczurek ,&nbsp;Sora Tsukagoshi ,&nbsp;Tomonori Ohba ,&nbsp;Stanisław Koter ,&nbsp;Emil Korczeniewski ,&nbsp;Gisya Abdi ,&nbsp;Artur P. Terzyk","doi":"10.1016/j.micromeso.2024.113321","DOIUrl":"10.1016/j.micromeso.2024.113321","url":null,"abstract":"<div><div>The new hybrid graphyne-like materials with highly developed specific surface area and excellent greenhouse gas adsorption properties have been described. Inorganic P₃N₃Cl₆ was selected as a building block and 1,4-diacetylene benzene was chosen as a linker for these materials. The chemical structure of P₃N₃Cl₆ allows for creation of three-dimensional materials with the BET surface area ranging from 600 to 1000 m² g⁻¹ and a pore volume as high as 0.3 cm³ g⁻¹. The obtained materials showed microporous structure and distinctive greenhouse gas adsorption properties. For those materials, CO₂ adsorption reached as high as 1.5 mmol g⁻¹, while for N₂O ranged from 1.5 to 1.7 mmol g⁻¹, and for CH₄ was 0.4 mmol g⁻¹ when adsorption was carried out at 100 kPa and 300 K. Moreover, obtained by the modified Dubinin adsorption model, the maximum adsorption values were 2.5–11 mmol g⁻¹ depending on the type of materials used. This finding suggests that new materials are promising high-pressure adsorbents of greenhouse gases.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"381 ","pages":"Article 113321"},"PeriodicalIF":4.8,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142323611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nanopore structure of highly enriched double-walled carbon nanotube network assemblies","authors":"Jae Hun Hwang,&nbsp;Dong Young Kim","doi":"10.1016/j.micromeso.2024.113336","DOIUrl":"10.1016/j.micromeso.2024.113336","url":null,"abstract":"<div><p>An efficient catalytic chemical vapor deposition method utilizing an Fe-Mo/MgO-supported catalyst was developed, allowing the highly selective synthesis of double-walled carbon nanotubes (DWCNTs) in high yield, exceeding 89 %. The carbon yield, tube diameter, and crystallinity of the synthesized DWCNTs were characterized using high-resolution transmission electron microscopy, field-emission scanning electron microscopy, thermogravimetric analysis, and Raman spectroscopy. The nanopore structure and adsorption characteristics of the DWCNTs purified by removing the support and catalyst (i.e., Fe-Mo/MgO) were analyzed <em>via</em> N₂ adsorption–desorption measurements at 77 K. A remarkable advantage of the highly enriched DWCNTs with small bundle network structures is that guest molecules can easily access the outer (i.e., external) surface of the DWCNTs, resulting in a large specific surface area (SSA) of &gt;691 m² g⁻¹ and pore volume of 2.70 mL g⁻¹ in the double-walled structures. Thus, highly enriched DWCNTs with large pore volumes and SSAs prepared <em>via</em> facile solution-based processes can yield CNT-based structures for applications in high-performance energy storage.</p></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"381 ","pages":"Article 113336"},"PeriodicalIF":4.8,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142243815","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}