Effect of pH in hydrothermal treatment of as-synthesized MCM-41 on wetting stability of resulting materials in aqueous solution
Effect of pH in aqueous media used in the hydrothermal treatment of as-synthesized MCM-41 on the structure and the wetting stability of the resulting materials was studied using XRD, TG-DTA and N 2 adsorption. The long-range structural order and the wetting stability of the mesoporous MCM-41 were im...
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| Veröffentlicht in: | Journal of porous materials 2009-08, Vol.16 (4), p.481-486 |
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| creator | Shindo, Takayoshi Nakazawa, Yuta Ozawa, Sentaro |
| description | Effect of pH in aqueous media used in the hydrothermal treatment of as-synthesized MCM-41 on the structure and the wetting stability of the resulting materials was studied using XRD, TG-DTA and N
2
adsorption. The long-range structural order and the wetting stability of the mesoporous MCM-41 were improved through hydrothermal treatment of as-synthesized sample at around pH 7 without salt addition. The pH adjustment of aqueous media toward neutral is thought to shift the polymerization equilibrium of silica species around external surface of the micelles to a higher degree of condensation, and to reduce the electrostatic repulsion between the silicate–micelle composites. This leads to the further formation of Si–O–Si network within the silica walls of the mesoporous materials, resulting in the enhancement of the structural stability of MCM-41 samples. |
| doi_str_mv | 10.1007/s10934-008-9222-y |
| format | Article |
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adsorption. The long-range structural order and the wetting stability of the mesoporous MCM-41 were improved through hydrothermal treatment of as-synthesized sample at around pH 7 without salt addition. The pH adjustment of aqueous media toward neutral is thought to shift the polymerization equilibrium of silica species around external surface of the micelles to a higher degree of condensation, and to reduce the electrostatic repulsion between the silicate–micelle composites. This leads to the further formation of Si–O–Si network within the silica walls of the mesoporous materials, resulting in the enhancement of the structural stability of MCM-41 samples.</description><identifier>ISSN: 1380-2224</identifier><identifier>EISSN: 1573-4854</identifier><identifier>DOI: 10.1007/s10934-008-9222-y</identifier><language>eng</language><publisher>Boston: Springer US</publisher><subject>Aqueous solutions ; Catalysis ; Characterization and Evaluation of Materials ; Chemistry ; Chemistry and Materials Science ; Hydrothermal treatment ; Media ; Physical Chemistry ; Polymerization ; Proteins ; Silicon dioxide ; Stability ; Surface chemistry ; Water pollution ; Wetting</subject><ispartof>Journal of porous materials, 2009-08, Vol.16 (4), p.481-486</ispartof><rights>Springer Science+Business Media, LLC 2008</rights><rights>Springer Science+Business Media, LLC 2009</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c413t-9e4cb2583143bef5cc31417a26c29fb9f004f7cb55caf9cbf49d97f869fbbe373</citedby><cites>FETCH-LOGICAL-c413t-9e4cb2583143bef5cc31417a26c29fb9f004f7cb55caf9cbf49d97f869fbbe373</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10934-008-9222-y$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10934-008-9222-y$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27903,27904,41467,42536,51297</link.rule.ids></links><search><creatorcontrib>Shindo, Takayoshi</creatorcontrib><creatorcontrib>Nakazawa, Yuta</creatorcontrib><creatorcontrib>Ozawa, Sentaro</creatorcontrib><title>Effect of pH in hydrothermal treatment of as-synthesized MCM-41 on wetting stability of resulting materials in aqueous solution</title><title>Journal of porous materials</title><addtitle>J Porous Mater</addtitle><description>Effect of pH in aqueous media used in the hydrothermal treatment of as-synthesized MCM-41 on the structure and the wetting stability of the resulting materials was studied using XRD, TG-DTA and N
2
adsorption. The long-range structural order and the wetting stability of the mesoporous MCM-41 were improved through hydrothermal treatment of as-synthesized sample at around pH 7 without salt addition. The pH adjustment of aqueous media toward neutral is thought to shift the polymerization equilibrium of silica species around external surface of the micelles to a higher degree of condensation, and to reduce the electrostatic repulsion between the silicate–micelle composites. This leads to the further formation of Si–O–Si network within the silica walls of the mesoporous materials, resulting in the enhancement of the structural stability of MCM-41 samples.</description><subject>Aqueous solutions</subject><subject>Catalysis</subject><subject>Characterization and Evaluation of Materials</subject><subject>Chemistry</subject><subject>Chemistry and Materials Science</subject><subject>Hydrothermal treatment</subject><subject>Media</subject><subject>Physical Chemistry</subject><subject>Polymerization</subject><subject>Proteins</subject><subject>Silicon dioxide</subject><subject>Stability</subject><subject>Surface chemistry</subject><subject>Water pollution</subject><subject>Wetting</subject><issn>1380-2224</issn><issn>1573-4854</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><recordid>eNp1UU1LJDEQDeKCOrs_YG_Bi6do0klPkqMM6iwoXtxzSGeSMdKdjEkaaS_-9U3PLAiCpyrqffCoB8Bvgi8JxvwqEywpQxgLJJumQdMROCUtp4iJlh3XnQqMKsBOwFnOLxhjKTg_BR83zllTYHRwt4Y-wOdpk2J5tmnQPSzJ6jLYsMd1RnkKFcr-3W7gw-oBMQJjgG-2FB-2MBfd-d6XaWYnm8d-fx50scnrPs_2-nW0ccwwx34sPoaf4IerkP31fy7A39ubp9Ua3T_e_Vld3yPDCC1IWma6phWUMNpZ1xpTN8J1szSNdJ10GDPHTde2RjtpOsfkRnInlhXsLOV0AS4OvrsUa4Rc1OCzsX2vw5xHSSLr30R94gKcf2G-xDGFGk4JQRlu-XK2IweSSTHnZJ3aJT_oNCmC1VyIOhSiaiFqLkRNVdMcNLlyw9amT-PvRf8AluqQzg</recordid><startdate>20090801</startdate><enddate>20090801</enddate><creator>Shindo, Takayoshi</creator><creator>Nakazawa, Yuta</creator><creator>Ozawa, Sentaro</creator><general>Springer US</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20090801</creationdate><title>Effect of pH in hydrothermal treatment of as-synthesized MCM-41 on wetting stability of resulting materials in aqueous solution</title><author>Shindo, Takayoshi ; Nakazawa, Yuta ; Ozawa, Sentaro</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c413t-9e4cb2583143bef5cc31417a26c29fb9f004f7cb55caf9cbf49d97f869fbbe373</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Aqueous solutions</topic><topic>Catalysis</topic><topic>Characterization and Evaluation of Materials</topic><topic>Chemistry</topic><topic>Chemistry and Materials Science</topic><topic>Hydrothermal treatment</topic><topic>Media</topic><topic>Physical Chemistry</topic><topic>Polymerization</topic><topic>Proteins</topic><topic>Silicon dioxide</topic><topic>Stability</topic><topic>Surface chemistry</topic><topic>Water pollution</topic><topic>Wetting</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Shindo, Takayoshi</creatorcontrib><creatorcontrib>Nakazawa, Yuta</creatorcontrib><creatorcontrib>Ozawa, Sentaro</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of porous materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Shindo, Takayoshi</au><au>Nakazawa, Yuta</au><au>Ozawa, Sentaro</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of pH in hydrothermal treatment of as-synthesized MCM-41 on wetting stability of resulting materials in aqueous solution</atitle><jtitle>Journal of porous materials</jtitle><stitle>J Porous Mater</stitle><date>2009-08-01</date><risdate>2009</risdate><volume>16</volume><issue>4</issue><spage>481</spage><epage>486</epage><pages>481-486</pages><issn>1380-2224</issn><eissn>1573-4854</eissn><abstract>Effect of pH in aqueous media used in the hydrothermal treatment of as-synthesized MCM-41 on the structure and the wetting stability of the resulting materials was studied using XRD, TG-DTA and N
2
adsorption. The long-range structural order and the wetting stability of the mesoporous MCM-41 were improved through hydrothermal treatment of as-synthesized sample at around pH 7 without salt addition. The pH adjustment of aqueous media toward neutral is thought to shift the polymerization equilibrium of silica species around external surface of the micelles to a higher degree of condensation, and to reduce the electrostatic repulsion between the silicate–micelle composites. This leads to the further formation of Si–O–Si network within the silica walls of the mesoporous materials, resulting in the enhancement of the structural stability of MCM-41 samples.</abstract><cop>Boston</cop><pub>Springer US</pub><doi>10.1007/s10934-008-9222-y</doi><tpages>6</tpages></addata></record> |
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| subjects | Aqueous solutions Catalysis Characterization and Evaluation of Materials Chemistry Chemistry and Materials Science Hydrothermal treatment Media Physical Chemistry Polymerization Proteins Silicon dioxide Stability Surface chemistry Water pollution Wetting |
| title | Effect of pH in hydrothermal treatment of as-synthesized MCM-41 on wetting stability of resulting materials in aqueous solution |
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