An All Low-Temperature Fabrication of Macroporous, Electrochemically Addressable Anatase Thin Films

被引：9

作者：

Schroeder, Michael ^{[1
]}

Sallard, Sebastien ^{[1
]}

Boehm, Matthias ^{[1
]}

Einert, Marcus ^{[1
]}

Suchomski, Christian ^{[1
,2
]}

Smarsly, Bernd M. ^{[1
]}

Mutisya, Stephen ^{[3
]}

Bertino, Massimo F. ^{[3
]}

机构：

[1] Univ Giessen, Inst Phys Chem, D-35392 Giessen, Germany

[2] Karlsruhe Inst Technol, Inst Nanotechnol, D-76344 Eggenstein Leopoldshafen, Germany

[3] Virginia Commonwealth Univ, Dept Phys, Richmond, VA 23284 USA

来源：

SMALL | 2014年 / 10卷 / 08期

关键词：

sol-gel processes; template synthesis; macroporous films; colloid dispersion; UV treatment; TIO2; FILMS; NONAQUEOUS SYNTHESIS; TIN OXIDE; ROUTE; IRRADIATION; GENERATION;

D O I：

10.1002/smll.201300970

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Macroporous TiO2 (anatase) thin films are fabricated by an all low-temperature process in which substrates are dip-coated in suspensions of mixed anatase nanoparticles and polystyrene beads, and the templating agents are removed by ultraviolet (UV) irradiation at a temperature below 50 degrees C. Scanning electron microscopy (SEM) and Raman spectroscopy show that the templating polymer beads are removed by UV irradiation combined with the photocatalytic activity of TiO2. X-Ray diffraction reveals that nanoparticle growth is negligible in UV irradiated films, while nanoparticle size increases by almost 10 times in calcined films that are prepared for comparison. The macroporous films are prepared on FTO-(fluorine-doped tin oxide) coated glass and ITO (indium tin oxide) coated flexible plastics and thereby used as working electrodes. In both cases, the films are electrochemically addressable, and cyclic voltammetry is consistent with the response of bulk TiO2 for calcined films and of nanoscale-TiO2 for UV-irradiated films.

引用

页码：1566 / 1574

页数：9

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