Liquid-Solid Transition of Confined Water in Silica-Based Mesopores
文献类型：期刊论文
| 作者 | Liu, XX ; Wang, Q ; Huang, XF ; Yang, SH ; Li, CX ; Niu, XJ ; Shi, QF ; Sun, G ; Lu, KQ |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY B
 |
| 出版日期 | 2010 |
| 卷号 | 114期号:12页码:4145 |
| 关键词 | X-RAY-DIFFRACTION DIFFERENTIAL SCANNING CALORIMETRY POROUS VYCOR GLASS NEUTRON-SCATTERING PHASE-TRANSITIONS INTERFACIAL WATER MELTING BEHAVIOR MCM-41 PORE ICE |
| ISSN号 | 1520-6106 |
| 通讯作者 | Wang, Q: Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | Cooling and heating curves of water confined in partially filled Vycor porous glass were measured for both adsorption and desorption processes. One endothermic and two exothermic peaks were observed for almost all cases. The peak temperature and the enthalpy of the exothermic peak located below 232 K increased initially and then decreased With further increases ill the filling factor. These abnormal changes were analyzed based oil the liquid-solid transition of nanoconfined water using a core/shell model, and the initial adsorption process of water in this typical mesoporous material with disordered pores is discussed. In addition, ail interesting observation is that different peak temperatures for the endothermic peak and ail almost constant peak temperature for the exothermic peak were observed at the same filling factor obtained under different sample preparation conditions, that is, adsorption and desorption processes. To compare with the liquid-solid transition temperatures of confined water ill fully filled silica-based mesopores of different pore radius, a parameter of the ratio of pore inner Surface area to confined liquid volume is proposed in this paper. Referring to this parameter, the core pail of confined water in silica-based nanopores has the same liquid-solid transition temperatures. This suggestion is valid for the freezing process of water confined in either fully filled ordered or fully or partially filled disordered pores. For the melting process, different linear changes of melting temperature with the ratio of pore inner surface area to liquid volume were observed for water in disordered and ordered pores. |
| 收录类别 | SCI |
| 资助信息 | NSFC [10574145, 10874208, 10675018]; National Basic Research Program of China [2004CB619005]; Key Item of Knowledge Innovation Project of Chinese Academy of Sciences [KJCX2-YW-M07] |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/40890]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Liu, XX,Wang, Q,Huang, XF,et al. Liquid-Solid Transition of Confined Water in Silica-Based Mesopores[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2010,114(12):4145. |
| APA | Liu, XX.,Wang, Q.,Huang, XF.,Yang, SH.,Li, CX.,...&Lu, KQ.(2010).Liquid-Solid Transition of Confined Water in Silica-Based Mesopores.JOURNAL OF PHYSICAL CHEMISTRY B,114(12),4145. |
| MLA | Liu, XX,et al."Liquid-Solid Transition of Confined Water in Silica-Based Mesopores".JOURNAL OF PHYSICAL CHEMISTRY B 114.12(2010):4145. |
入库方式： OAI收割
来源：物理研究所
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