| Structrue and Characteristics of Mesoporous Silica Synthesized in Acid Medium and Its Reaction Mechanism |
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| 作者姓名： | 雷家珩 |
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| 作者单位： | Wuhan University |
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| 基金项目： | FundedbytheNationalNaturalScienceFoundationofChi na (5 0 2 72 0 4 8)andtheNaturalScienceFoundationofHubeiProv ince (2 0 0 1ABB0 76 ) |
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| 摘 要： | 1 IntroductionNanoporousmaterialsnotonlypossessasupermicrosizeeffectofnanoparticlesandahighsurfaceactivity ,butalsohaveahugeporevolumeandaloadingcapacity .Sotheyshowanexcellentpotentialforapplicationsinbio logicaltechnology ,medicalengineering ,andnovelf…
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Structrue and Characteristics of Mesoporous Silica Synthesized in Acid Medium and Its Reaction Mechanism |
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| LEI Jia-heng,ZHAO Jun,CHEN Yong-xi,GUO Li-ping,LIU Dan,Wuhan University of Technology.Structrue and Characteristics of Mesoporous Silica Synthesized in Acid Medium and Its Reaction Mechanism[J].Journal of Wuhan University of Technology. Materials Science Edition,2004,19(3). |
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| Authors: | LEI Jia-heng ZHAO Jun CHEN Yong-xi GUO Li-ping LIU Dan Wuhan University of Technology |
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| Affiliation: | LEI Jia-heng ZHAO Jun CHEN Yong-xi GUO Li-ping LIU Dan Wuhan University of Technology |
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| Abstract: | Structrue and pore characteristics of the mesoporous silica synthesized in acid medium were studied by means of XRD, HRTEM, BET, FT-IR, DSC-TGA, and the reaction mechanism was also investigated deeply. The results show that mesopores in the sample possess hexagonal arrays obviously, whereas the structure of silica matrix is amorphous. The results also show that the acting mode of silica and CTMA inside the mesopores was chemical bonding force. The structure of mesoporous silica was mainly dependent on the aggregational condition of micelle of CTMA as well as their liquid-crystallized status. In addition, condensation and dehydration of silicate radicals were accompanied in the process of calcination, which resulted in the mesoporous structure ordered in local range and the pore sizes largening. |
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| Keywords: | porous silica mesoporous molecular sieves isothermal adsorption CTMABr |
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