Abstract
High spinning speed1H magic-angle spinning nuclear magnetic resonance (1H MAS NMR) was used to detect surface hydroxyl groups of diatomite, which include isolated hydroxyl groups and hydrogen-bonded hydroxyl groups, and water adsorbed on diatomite surface that include pore water and hydrogen-bonded water. The corresponding proton chemical shifts of above species are ca. 2.0, 6.0–7.1, 4.9 and 3.0 respectively. Accompanied by thermal treatment temperature ascending, the pore water and hydrogen-bonded water are desorbed successively. As a result, the relative intensities of the peaks assigned to protons of isolated hydroxyl groups and hydrogen-bonded hydroxyl groups increase gradually and reach their maxima at 1000°C. After 1100°C calcination, the hydroxyl groups that classified to strongly hydrogen-bonded ones and the isolated hydroxyl groups condense basically. But some weakly hydrogen-bonded hydroxyl groups may still persist in the micropores.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Yuan, P., Wu, D. Q., Present situation in applications of diatomite in fields of some products with high additional value and related fundamental research, Journal of Mineral and Petrology (in Chinese), 2000, 20(1): 101.
Calacal, E. L., Whittemore, O. J., The sintering of diatomite, American Ceramic Society Bulletin, 1987(2): 1.
Wang, F. Y., Zhang H. F., Feng, H. et al., A mineralogical study of diatomite in Leizhou Peninsula, Chinese Journal of Geochemistry, 1995, 14(2): 140.
Feng, H., Zhang, H. F., Guo, J, G. et al.,29Si MAS NMR spectroscopic study of diatomite, Acta Mineralogica Sinca (in Chinese), 1999, 19(2): 210.
Yang, Y. X., Wang, J. X., Yang, Z. et al., A study on the mechanism of the adsorption of urokinase on the local diatomite, Acta Chimica Sinica (in Chinese), 1994, 52: 670.
Chen, R. S., Yang, Y. X., Hou, Q. T., Progress of study on local diatomites and their new application, Chemical Industry Times (in Chinese), 1997, 11(5): 54.
Wang, X. Q., Gao, S., Yu, L. X. et al., Synthesis of porphyrin nanometer material by a new method, Journal of Chinese Universities (in Chinese), 1998, 19(6): 854.
Wu, D. Q., Diao, G. Y., Wei, J. F. et al., Surface function groups and surface reactions of minerals, Geological Journal of China Universities (in Chinese), 2000, 6(2): 225.
Yuan, P., Wu, D. Q., Ling, Z. Y. et al., Study on surface hydroxyl species on diatomite using drift spectroscopy, Spectroscopy and Spectral Analysis (in Chinese) (in press).
Morrow, B. A., Mcfarian, A. J., Surface vibrational modes of hydroxyl groups on silica, Journal of American Chemical Society, 1992, 96: 1395.
Koretsky, C. W., Sverjensky, D. A., Salisbury, J. W. et al., Detection of surface hydroxyl species on quartz, γ-alumina, and feldspars using diffuse reflectance infrared spectroscopy, Geochimi. Cosmochim. Acta, 1997, 61: 2193.
Bronnimann, C. E., Zeigler, R. C., Maciel, G. E., Proton NMR study of dehydration of the silica gel surface, Journal of American Chemical Society, 1988, 110(7): 2023.
Liu, C. C., Maciel, G. E., The fumed silica surface: a study by NMR, Journal of American Chemical Society, 1996, 118: 5103.
Bogdan, A., Kulmala, M., Gorbunov, B. et al., NMR study of phase transitions in pure water and binary H2O/HNO3 films adsorbed on surface of pyrogenic silica, Journal of Colloid and Interface Science, 1996, 177: 79.
Caillerie, J. B., Aimeur, M. R., Kortobi, Y. E., Water adsorption on pyrogenic silica followed by1H MAS NMR, Journal of Colloid and Interface Science, 1997, 194:434.
Hamdan, H., Muhid, M., Endud, S. et al.,29Si MAS NMR, XRD and FESEM studies of rice husk silica for the synthesis of zeolites, Journal of Non-crystalline Solids, 1997, 211: 126.
Li, X. A., Feng, H., Zhang H. F. et al., NMR study of water in diatomite, Acta Mineralogica Sinica (in Chinese), 1999, 19(2): 154.
Author information
Authors and Affiliations
Corresponding author
About this article
Cite this article
Peng, Y., Daqing, W., Zhong, C. et al. 1H MAS NMR spectra of hydroxyl species on diatomite surface. Chin. Sci. Bull. 46, 1112–1115 (2001). https://doi.org/10.1007/BF02900691
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02900691