Open AccessVibrational dynamics of water confined in mesoporous silica under low temperature
Author(s) -
Huang Xiu-Feng,
Liqing Pan,
Chenxi Li,
Qiang Wang,
Gang Sun,
Lu Kun-Quan
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.61.136801
Subject(s) - raman spectroscopy , materials science , amorphous solid , atmospheric temperature range , amorphous silica , mesoporous material , mesoporous silica , amorphous ice , analytical chemistry (journal) , thermodynamics , optics , chemistry , crystallography , chemical engineering , physics , environmental chemistry , engineering , biochemistry , catalysis
The Raman vibrational spectra of water inside mesoporous silicate are measured in a temperature range of 100 T 303 K. It is found that the Raman spectrum of confined water becomes more different from that of bulk water with the decrease of water content in pores. For samples with high water content in pore, the main peak position of the Raman spectrum of water changes abruptly in a narrow temperature range. However, when water content decreases down to 20%, the red shift of the main peak of the Raman spectrum is continuous with temperature decreasing. At the same time, its temperature-dependence is the same as that of bulk amorphous ice.