Preparation of Ordered Porous TiO_2 Film from Honeycomb Structured TBT/PMMA Hybrid Film

TBT/PMMA organic-inorganic hybrid honeycomb patterned film was prepared by Breath Figures method,then it was suffered vapor phase hydrothermal treatment and transformed into ordered porous TiO2 film via pyrolysis process.The hole structure was investigated during the vapor phase hydrothermal treatment and pyrolysis process.The results show that,during the vapor phase hydrothermal treatment,TBT hydrolyzes to titanium hydrogen oxide hydrates,forming the stronger-Ti-O-networks,which therefore prevents the PMMA from liquefied in the pyrolysis process,as a result the ordered porous TiO2 film is obtained.Compared with non-hydrothermal treated TiO2 film,the resulted ordered porous TiO2 film enhances the photoelectrochemical response and its photocurrent density is increased by 3 times under UV light irradiation.