- 著者
- 貝塚 爽平 木曾 敏行 町田 貞 太田 陽子 吉川 虎雄
- 出版者
- The Association of Japanese Geographers
- 雑誌
- 地理学評論 (ISSN:00167444)
- 巻号頁・発行日
- vol.37, no.2, pp.89-102, 1964
- 被引用文献数
- 2
木曽川・矢作川流域には,第三紀~第四紀に形成された小起伏侵蝕面,河成あるいは海成の段丘面,断層地形など各種の地形がみられる.本文は,この地域でおこなわれた日本地理学会の現地シンポジウムでの討論をもとに編集した総合的報告である.ここには,木曽川・矢作川の段丘と濃尾平野東縁の段丘の対比,それらの形成過程や気候環境なども取上げられているが,主な論点は,むしろ鮮新世末の地層とその堆積面(土岐面・藤岡面),ならびに新旧いくつかの小起伏侵蝕面の形成環境・古地理・地形発達史などの問題にある.ほかに断層地形の形成時代などについても論じた.
- 著者
- 曾 敏 上川 直文 小島 隆 掛川 一幸
- 出版者
- 公益社団法人日本セラミックス協会
- 雑誌
- 日本セラミックス協会学術論文誌 : Nippon Seramikkusu Kyokai gakujutsu ronbunshi = Journal of the Ceramic Society of Japan (ISSN:13486535)
- 巻号頁・発行日
- vol.115, no.1348, pp.840-845, 2007-12-01
- 被引用文献数
- 5
The titania particles were prepared by aging the mixture of titanium isopropoxide (TIP) and H_2O at 318 K. The anatase titania particles were obtained by the aging procedure at 318 K for more than 16 h. The aging temperature was quite low to obtain anatase-type titania particles. According to the DTA measurement, the amount of amorphous phase included in the titania particles decreased with increases in the aging time. Furthermore, the titania particles obtained by aging the mixture of TIP and H_2O at 318 K for 24 h contained no amorphous phase. The obtained titania particles had a high BET specific surface area of more than 250m^2/g. To characterize the titania surface, the adsorption isotherms of the organic dye molecules in an aqueous solution were measured. The negatively charged Evans blue molecules strongly adsorbed on the titania surface obtained by the low-temperature hydrolysis reaction as compared with the results of the methylene blue molecules. Furthermore, the decomposition kinetics of the dye molecules by the photocatalytic activity also deepened with the charge of the dye molecules. The relation between the UV irradiation time and the molar ratio of the decomposed dye molecules followed the Avrami equation. According to the results of the analysis using the Avrami equation, the Evans blue molecules were decomposed on the titania particle surface. In contrast, the methylene blue molecules were decomposed in the aqueous solution. The difference in kinetics was related to the interaction of the dye molecules and the titania surface. The high surface area of the titania particles obtained the low-temperature hydrolysis reaction of titanium alkoxides enhanced the effect of the surface interaction on kinetics of the photocatalytic activity.