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On the state of water in 2.4 nm cylindrical pores of MCM from dynamic and normal specific heat studies
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10.1063/1.4817333
/content/aip/journal/jcp/139/6/10.1063/1.4817333
http://aip.metastore.ingenta.com/content/aip/journal/jcp/139/6/10.1063/1.4817333
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) The per g of water in the 2.4 nm pore MCM-41-S measured on the cooling path from 280 K to 160 K is plotted against the temperature (curve 1). Also plotted is the measured on the heating path from 160 K to 280 K (curve 2). The same plots are also given at 1/10th scale to show the relative heights of the peaks. The continuous (black) line is for specific heat of ice and water from the literature. (b) The corresponding plots of the . (c) The corresponding plots of the . The cooling and heating rates were 12 K/h, = 3.33 mHz, and the peak to peak temperature modulation was 1 K.

Image of FIG. 2.
FIG. 2.

(a) The per g of water in the 2.4 nm pores MCM-41-S measured on the cooling path at rate 60 K/h (squares) and also at rate 12 K/h (triangles). (b) The corresponding plots of is on the heating path. The inset indicates the thermal history. Curve labeled (i) is for the cooling path and (ii) is for the heating path.

Image of FIG. 3.
FIG. 3.

The per g of water in 2.4 nm pores MCM-41-S. Curve (a) is the heating curve of the sample that was cooled from 280 K to 250 K and then heated at 60 K/h. Curve (b) is the heating curve for the sample cooled from 280 K to 160 K at 60 K/h and then heated at at 60 K/h. In each case the sample was annealed for 30 min before heating. The inset shows the thermal history of the samples.

Image of FIG. 4.
FIG. 4.

(a) The per g of water in the 2.4 nm pores MCM-41-S measured on the cooling path and heating path both at 12 K/h, are plotted against the temperature. The sample was first cooled from 280 K to 220 K at 60 K/h, kept for 30 min at 220 K, heated to 250 K at 60 K/h, cooled to 160 K, and then heated at 12 K/h. The on both cooling (curve 1) and heating (curve 2) path is plotted. (b) The corresponding plots of . (c) The corresponding plots of . was 3.33 mHz and the peak to peak temperature modulation was 1 K.

Image of FIG. 5.
FIG. 5.

(a) The and per g of water in the 2.4 nm pore MCM-41-S measured on the cooling path from 280 K to 160 K are plotted against the temperature. (b) The corresponding plots of and measured on heating from 160 K to 280 K. Data are taken from Figs. 1(a) and 1(b) . The same plots are also given at 1/10th scale to show the relative heights of the peaks. The continuous line is for specific heat of ice and water taken from the literature.

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/content/aip/journal/jcp/139/6/10.1063/1.4817333
2013-08-13
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: On the state of water in 2.4 nm cylindrical pores of MCM from dynamic and normal specific heat studies
http://aip.metastore.ingenta.com/content/aip/journal/jcp/139/6/10.1063/1.4817333
10.1063/1.4817333
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