| Synthesis of mesoporous silica materials with ascorbic acid as template via sol-gel process |
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| 作者姓名： | 逄杰斌 丘坤元 危岩 |
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| 作者单位： | Department of Polymer Science and Engineering，College of Chemistry and Molecular Engineering，Peking University，Beijing 100871，China，Department of Polymer Science and Engineering，College of Chemistry and Molecular Engineering，Peking University，Beijing 100871，China，Department of Chemistry，Drexel University，Philadelphia，Pennsylvania 19104，USA |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (No. 29874002)，the Outstanding Young Scientist Award from National Natural Science Foundation of China (No. 29825004) |
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| 摘 要： | Mesoporous silica materials with pore diameters of 2-5 nm have been prepared using ascorbic acid as a nonsurfactant template or pore-forming agent in HCl-catalyzed sol-gel reactions of tetraethylorthosilicate,followed by removing the ascorbic acid compound by extraction with ethanol.Characterization results from nitrogen sorption isotherm,powder X-ray diffraction and transmission electron microscopy indicate that the materials have large specific surface areas (e.g.1000 m2/g) and pore volumes (e.g.0.8 cm3/g).The rnesoporosity is arisen from interconnecting disordered wormlike channels and pores with relatively broad size distributions.As the ascorbic acid concentration is increased,the pore diameters and pore volumes of the materials increase.
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Synthesis of mesoporous silica materials with ascorbic acid as template via sol-gel process |
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| PANG,Jie-Bin QIU,Kun-Yuan WEI,Yen.Synthesis of mesoporous silica materials with ascorbic acid as template via sol-gel process[J].Chinese Journal of Chemistry,2000,18(5):693-697. |
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| Authors: | PANG Jie-Bin QIU Kun-Yuan WEI Yen |
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| Institution: | PANG,Jie-Bin QIU,Kun-Yuan WEI,YenDepartment of Polymer Science and Engineering,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China Department of Chemistry,Drexel University,Philadelphia,Pennsylvania 19104,USA |
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| Abstract: | Mesoporous silica materials with pore diameters of 2-5 nm have been prepared using ascorbic acid as a nonsurfactant template or pore-forming agent in HCl-catalyzed sol-gel reactions of tetraethylorthosilicate,followed by removing the ascorbic acid compound by extraction with ethanol.Characterization results from nitrogen sorption isotherm,powder X-ray diffraction and transmission electron microscopy indicate that the materials have large specific surface areas (e.g.1000 m2/g) and pore volumes (e.g.0.8 cm3/g).The rnesoporosity is arisen from interconnecting disordered wormlike channels and pores with relatively broad size distributions.As the ascorbic acid concentration is increased,the pore diameters and pore volumes of the materials increase. |
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| Keywords: | Mesoporous silica material ascorbic acid nonsur-factant template sol-gel process |
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