TY - JOUR
T1 - Adsorption behavior of nitrogen monoxide on KxGaxSn8-xO16 hollandite
AU - Fujimoto, Kenjiro
AU - Suzuki, Jun
AU - Mori, Toshiyuki
AU - Watanabe, Mamoru
PY - 2000/12
Y1 - 2000/12
N2 - Fine powder of KxGaxSn8-xO16 hollandite was prepared by the sol-gel process using metal alkoxides, and the adsorption behavior of nitrogen monoxide (NO) on it was examined by temperature programmed desorption (TPD) method and in situ diffuse reflectance fourier transform infrared spectroscopy. Any species other than nitrogen monoxide were not detected in the TPD measurement, and the profile showed three stages between 420 and 880 K which were regarded as the desorption of chemically adsorbed NOx species. This desorption behavior seems well consistent with the spectral changes in the FT-IR measurement. The absorption band at 1270 cm-1 was decayed in the first stage from 420 to 640 K, and the bands at 1235 and 1570 cm-1 in the second stage from 640 and 770 K. In the third stage above 770 K, the strong band at 1340 cm-1 disappeared. These NOx species on the hollandite were estimated to have a form of NO3- in the first and second stages and a form of NO2- in the third stage, considering the data on adsorption of nitrogen oxides on La2O3 and CaO.
AB - Fine powder of KxGaxSn8-xO16 hollandite was prepared by the sol-gel process using metal alkoxides, and the adsorption behavior of nitrogen monoxide (NO) on it was examined by temperature programmed desorption (TPD) method and in situ diffuse reflectance fourier transform infrared spectroscopy. Any species other than nitrogen monoxide were not detected in the TPD measurement, and the profile showed three stages between 420 and 880 K which were regarded as the desorption of chemically adsorbed NOx species. This desorption behavior seems well consistent with the spectral changes in the FT-IR measurement. The absorption band at 1270 cm-1 was decayed in the first stage from 420 to 640 K, and the bands at 1235 and 1570 cm-1 in the second stage from 640 and 770 K. In the third stage above 770 K, the strong band at 1340 cm-1 disappeared. These NOx species on the hollandite were estimated to have a form of NO3- in the first and second stages and a form of NO2- in the third stage, considering the data on adsorption of nitrogen oxides on La2O3 and CaO.
UR - https://www.scopus.com/pages/publications/0034481483
U2 - 10.1023/A:1008722824410
DO - 10.1023/A:1008722824410
M3 - Conference article
AN - SCOPUS:0034481483
SN - 0928-0707
VL - 19
SP - 377
EP - 381
JO - Journal of Sol-Gel Science and Technology
JF - Journal of Sol-Gel Science and Technology
IS - 1-3
T2 - 10th International Workshop pn Glass and Ceramics, Hybrids and Nanocomposites from Gels
Y2 - 20 September 1999 through 24 September 1999
ER -