Adsorption behavior of nitrogen monoxide on KxGaxSn8-xO16 hollandite

Kenjiro Fujimoto, Jun Suzuki, Toshiyuki Mori, Mamoru Watanabe

研究成果: Conference article査読

7 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)377-381
ページ数5
ジャーナルJournal of Sol-Gel Science and Technology
19
1-3
DOI
出版ステータスPublished - 12月 2000
イベント10th International Workshop pn Glass and Ceramics, Hybrids and Nanocomposites from Gels - Yokohama, Jpn
継続期間: 20 9月 199924 9月 1999

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