Nanoporous TiO_2 Developed from Two Templates for Their Use in Photovoltaic Applications

摘要

Described work is a development of templated nanoporous TiO_2 using two different substrates. Controlled parametric syntheses of nanoporous textures give rise high surface area as well as high aspect ratios. High electric field application for specific time and the composition of electrolytes used in synthesis cell needs a careful study. Ethylene glycol, an organic solvent, with F~- free ions in the presence of HC1 is used for the purpose in cell bath. Ti templated and Ti-Al templated nanoporous TiO_2 shows lower porosity at low voltage treatments, while both the templates reveal high porous structure at 20V. Increasing the time of Ti template for a specific voltage leads to collapse of pores while it enhances the roughness of the walls of collapsed pores and hence improving the surface rea. Energy dispersive x-ray (EDX) elemental analysis confirms the presence of TiO_2.