シュジュ ノ コウゾウ オ モツ キンゾク サンカブツ ナノ コウゾウタイ ノ チョウセイ ト ヒカリ ショクバイ スイソ ハッセイ ハンノウ エ ノ リヨウ

京都大学0048新制・課程博士博士(エネルギー科学)甲第14181号エネ博第183号新制||エネ||42(附属図書館)UT51-2008-N498京都大学大学院エネルギー科学研究科エネルギー基礎科学専攻(主査)教授 吉川 暹, 教授 八尾 健, 教授 石原 慶一学位規則第4条第1項該当Doctor of Energy ScienceKyoto UniversityDA

Optical Properties of the Carbon-Modified TiO2 Prepared by Microwave Carbonization Process

The carbon-modified TiO2 were synthesized through microwave carbonization of ethanol by using a domestic microwave oven. This process enabled to form the carbonaceous compounds on the surface of TiO2 and created several new mid-gap bands into the original bandgap within few minutes operation. The sample showed a remarkable visible-light absorption even at the wavelength of around 800 nm. The promotion of photocatalytic activity under visible and ultraviolet (UV) light irradiation were also confirmed by the I3- formation in KI aqueous solution. The I3- formation rate of carbon-modified TiO2 per unit mass under visible light is almost 25 times higher than that of pure TiO2. The mid-gap optical absorption mechanisms were investigated through analysis of absorption edges. It is revealed that surface state change against microwave-treatment time results in different mid-gap optical absorption processes

High emissivity cerium oxide coating

The present invention relates to a coating composition comprising: IO to 80 wt% of cerium oxide comprising a dopant based upon the total weight of the composition, wherein said dopant is selected from iron oxide, cobalt oxide, chromium oxide, lan­thanum oxide, or mixtures thereof, and the atomic ratio of dopant metal to cerium is in the range 0.01:l to 0.5:l; and IO to 50 wt% of binder based upon the total weight of the composition

Optical Properties of the Carbon-Modified TiO2 Prepared by Microwave Carbonization Process

The carbon-modified TiO2 were synthesized through microwave carbonization of ethanol by using a domestic microwave oven. This process enabled to form the carbonaceous compounds on the surface of TiO2 and created several new mid-gap bands into the original bandgap within few minutes operation. The sample showed a remarkable visible-light absorption even at the wavelength of around 800 nm. The promotion of photocatalytic activity under visible and ultraviolet (UV) light irradiation were also confirmed by the I3- formation in KI aqueous solution. The I3- formation rate of carbon-modified TiO2 per unit mass under visible light is almost 25 times higher than that of pure TiO2. The mid-gap optical absorption mechanisms were investigated through analysis of absorption edges. It is revealed that surface state change against microwave-treatment time results in different mid-gap optical absorption processes