A new study on the kinetics of Stober synthesis by in-situ liquid Si-29 NMR
文献类型：期刊论文
| 作者 | Xu, Yao; Wu, Dong; Sun, Yuhan; Gao, Hongchang; Yuan, Hanzhen; Deng, Feng |
| 刊名 | JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2007-04-01 |
| 卷号 | 42期号:1页码:13-20 |
| 关键词 | Stober synthesis reaction kinetics nuclear magnetic resonance |
| 英文摘要 | Liquid-state (29)SiNMRwas used to investigate the hydrolysis and condensation kinetics of ammonia-catalyzed tetraethoxysilane (TEOS) in methanol system. The reactive rate constants were calculated by applying first-order reaction approximation and the steady state approximation theory. The reaction orders with respect to TEOS, ammonia and water were derived, as well as the activation energies and the Arrhenius constants. It was found that the formation of intermediate species Si(OH)(OEt)(3) was the rate-limiting step and its reaction rate equation was r(TEOS) = 7.41 x 10(-3)[TEOS][NH3](0.333)[H2O](0.227). Higher reactive temperature benefited the hydrolysis of TEOS. The results presented here indicated quantificationally that the formation of colloidal SiO2 particles was controlled by the initial hydrolysis of TEOS. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Materials Science, Ceramics |
| 研究领域[WOS] | Materials Science |
| 关键词[WOS] | SILICA PARTICLES ; CATALYZED-HYDROLYSIS ; STEADY-STATE ; GROWTH ; CONDENSATION ; RANGE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000244300500003 |
| 公开日期 | 2015-08-18 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/4881]  |
| 专题 | 武汉物理与数学研究所_2011年以前论文发表（包括2011年） |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Coral Conversat, Inst Coal Chem, Taiyuan 030001, Peoples R China 2.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonace & Atom, Wuhan 430071, Peoples R China 3.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Mol Phys, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Yao,Wu, Dong,Sun, Yuhan,et al. A new study on the kinetics of Stober synthesis by in-situ liquid Si-29 NMR[J]. JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY,2007,42(1):13-20. |
| APA | Xu, Yao,Wu, Dong,Sun, Yuhan,Gao, Hongchang,Yuan, Hanzhen,&Deng, Feng.(2007).A new study on the kinetics of Stober synthesis by in-situ liquid Si-29 NMR.JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY,42(1),13-20. |
| MLA | Xu, Yao,et al."A new study on the kinetics of Stober synthesis by in-situ liquid Si-29 NMR".JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY 42.1(2007):13-20. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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