Texture properties of nanoporous TiO2 films prepared by anodic electrodeposition using a structure-directing agent
Thick highly porous crystalline films of TiO2 were prepared at temperature as low as 80 oC by anodic electrodeposition using bromothymol blue as a structure-directing agent. X-ray diffraction shows the almost exclusive presence of rutile in the films. Detailed texture analysis based on N2 and Kr sorption properties of the films indicates that the as-deposited films are micro-mesoporous. Their calcination in air at 450 oC leads to drastic texture changes, namely the removal of almost all the micropores and the creation of a large amount of mesopores, which is clearly due to the growth of TiO2 nanocrystals. Based on the comparison of the texture data obtained using N2 and Kr as adsorptives, a deeper insight into their applicability and comparability has been achieved. Even if there are some discrepancies, especially if larger mesopores are present, both adsorptives provide basically the same information on the texture of porous solids.
Ji(r)í Rathousk(y) Katrin Wessels Michael Wark Torsten Oekermann
J. Heyrovsk(y) Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejskov Institute of Physical Chemistry and Electrochemistry, Leibniz Universitat Hannover, Callinstrasse 3-
国际会议
北京
英文
2007-08-12（万方平台首次上网日期，不代表论文的发表时间）