Structure of Ice in Confinement: Water in Mesoporous Carbons
详细信息 查看全文
- 作者：Kamila Domin ; Kwong-Yu Chan ; Hoi Yung ; Keith E. Gubbins ; Marcin Jarek ; Angelina Sterczynska ; Malgorzata Sliwinska-Bartkowiak
- 刊名：Journal of Chemical & Engineering Data
- 出版年：2016
- 出版时间：December 8, 2016
- 年：2016
- 卷：61
- 期：12
- 页码：4252-4260
- 全文大小：601K
- ISSN：1520-5134
文摘
In this study, the structure of nanoconfined ice and its behavior during the melting process have been investigated. For this purpose, deionized water was inserted into the pores of the ordered carbon structures CMK-3 and CMK-8 having pores of different diameters. The first set of experiments was performed using differential scanning calorimetry (DSC), from which the melting transition temperature of the confined ice was determined. In order to investigate the structure of ice formed inside the mesopores, wide-angle X-ray scattering was used. The measurements were performed at temperatures from 173 K up to and above the pore melting point for each system. The results of the XRD experiments showed features characteristic of both hexagonal, Ih, and cubic, Ic, ice at temperatures below the melting point. The structure of the confined ice corresponds to disordered stacking ice layers, ice Isd, and our results agree well with recent simulations of X-ray diffraction of such ice crystals by Murray and co-workers.