M. Dolores Garrido , David Vie , José F. Serrano-Claumarchirant , Jamal El Haskouri , José Vicente Ros-Lis , Pedro Amorós
{"title":"通过简便快捷的方法获得具有管状形态的双峰 MWCNT-SiO2 介孔复合材料和相关硅材料","authors":"M. Dolores Garrido , David Vie , José F. Serrano-Claumarchirant , Jamal El Haskouri , José Vicente Ros-Lis , Pedro Amorós","doi":"10.1016/j.micromeso.2024.113244","DOIUrl":null,"url":null,"abstract":"<div><p>This work presents a straightforward preparative strategy for obtaining bimodal porous silica-based materials with tubular morphology (denoted as UVM-14). They include composites comprised of MWCNTs and a mesoporous silica coating, synthesized through a combination of hard and soft templating agents, specifically MWCNTs and surfactants. Two distinct materials may be obtained depending on the handling of this solid. The chemical extraction of the surfactant yields a core-shell composite that conserves the MWCNT core, coated with a mesoporous silica shell with pores arranged radially in relation to the nanotube axis. On the other hand, when the starting material is calcined, the two templating agents are eliminated. A silica with a hierarchical bimodal porosity is obtained, combining tubular cavities with a mesoporous shell. The synthesis methodology benefits from the optimal colloidal dispersion of non-covalently functionalized MWCNTs with CTAB prepared using a mechanochemical process. Also, the atrane method (using silatrane as Si source and working in a hydroalcoholic medium) is crucial to obtain a complete, very homogeneous, and modulable (in thickness) nanotube coating with a mesostructured silica shell. Typically, surface areas round 1100 m<sup>2</sup> g<sup>−1</sup> and pore diameters of 2.5 and 15–35 nm can be prepared. The structure of the materials can be adjusted by modifying the length of the nanotubes and the thickness of the porous silica layer.</p></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":null,"pages":null},"PeriodicalIF":4.8000,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S138718112400266X/pdfft?md5=5c0658103177acad37f992e4b5bcb70d&pid=1-s2.0-S138718112400266X-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Bimodal MWCNT-SiO2 mesoporous composites and related silicas with tubular morphology through an easy and fast protocol\",\"authors\":\"M. Dolores Garrido , David Vie , José F. Serrano-Claumarchirant , Jamal El Haskouri , José Vicente Ros-Lis , Pedro Amorós\",\"doi\":\"10.1016/j.micromeso.2024.113244\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>This work presents a straightforward preparative strategy for obtaining bimodal porous silica-based materials with tubular morphology (denoted as UVM-14). They include composites comprised of MWCNTs and a mesoporous silica coating, synthesized through a combination of hard and soft templating agents, specifically MWCNTs and surfactants. Two distinct materials may be obtained depending on the handling of this solid. The chemical extraction of the surfactant yields a core-shell composite that conserves the MWCNT core, coated with a mesoporous silica shell with pores arranged radially in relation to the nanotube axis. On the other hand, when the starting material is calcined, the two templating agents are eliminated. A silica with a hierarchical bimodal porosity is obtained, combining tubular cavities with a mesoporous shell. The synthesis methodology benefits from the optimal colloidal dispersion of non-covalently functionalized MWCNTs with CTAB prepared using a mechanochemical process. Also, the atrane method (using silatrane as Si source and working in a hydroalcoholic medium) is crucial to obtain a complete, very homogeneous, and modulable (in thickness) nanotube coating with a mesostructured silica shell. Typically, surface areas round 1100 m<sup>2</sup> g<sup>−1</sup> and pore diameters of 2.5 and 15–35 nm can be prepared. The structure of the materials can be adjusted by modifying the length of the nanotubes and the thickness of the porous silica layer.</p></div>\",\"PeriodicalId\":392,\"journal\":{\"name\":\"Microporous and Mesoporous Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.8000,\"publicationDate\":\"2024-07-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S138718112400266X/pdfft?md5=5c0658103177acad37f992e4b5bcb70d&pid=1-s2.0-S138718112400266X-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Microporous and Mesoporous Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S138718112400266X\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microporous and Mesoporous Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S138718112400266X","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
Bimodal MWCNT-SiO2 mesoporous composites and related silicas with tubular morphology through an easy and fast protocol
This work presents a straightforward preparative strategy for obtaining bimodal porous silica-based materials with tubular morphology (denoted as UVM-14). They include composites comprised of MWCNTs and a mesoporous silica coating, synthesized through a combination of hard and soft templating agents, specifically MWCNTs and surfactants. Two distinct materials may be obtained depending on the handling of this solid. The chemical extraction of the surfactant yields a core-shell composite that conserves the MWCNT core, coated with a mesoporous silica shell with pores arranged radially in relation to the nanotube axis. On the other hand, when the starting material is calcined, the two templating agents are eliminated. A silica with a hierarchical bimodal porosity is obtained, combining tubular cavities with a mesoporous shell. The synthesis methodology benefits from the optimal colloidal dispersion of non-covalently functionalized MWCNTs with CTAB prepared using a mechanochemical process. Also, the atrane method (using silatrane as Si source and working in a hydroalcoholic medium) is crucial to obtain a complete, very homogeneous, and modulable (in thickness) nanotube coating with a mesostructured silica shell. Typically, surface areas round 1100 m2 g−1 and pore diameters of 2.5 and 15–35 nm can be prepared. The structure of the materials can be adjusted by modifying the length of the nanotubes and the thickness of the porous silica layer.
期刊介绍:
Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal.
Topics which are particularly of interest include:
All aspects of natural microporous and mesoporous solids
The synthesis of crystalline or amorphous porous materials
The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic
The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions
All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials
Adsorption (and other separation techniques) using microporous or mesoporous adsorbents
Catalysis by microporous and mesoporous materials
Host/guest interactions
Theoretical chemistry and modelling of host/guest interactions
All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.