Hydrothermal Synthesis of Nanorods/Nanoparticles TiO{sub}2 for Photocatalytic Activity and Dye-sensitized Solar Cell Applications

摘要

Nanorods/nanoparticles TiO{sub}2 with mesoporous structure were synthesized by hydrothermal method at 150°C for 20h. The samples characterized by XRD, SEM, TEM, SAED, HRTEM, and BET surface area. The nanorods had diameter about 10-20nm and the lengths of 100-200nm, the nanoparticles had diameter about 5-10nm. The prepared material had average pore diameter about 7-12nm. The BET surface area and pore volume of the sample are about 203m/g and 0.655cm{sup}3/g, respectively. The nanorods/nanoparticles TiO{sub}2 with mesoporous structure showed higher photocatalytic activity (I{sub}3{sup}- concentration) than the nanorods TiO{sub}2, nanofibers TiO{sub}2, mesoporous TiO{sub}2, and commercial TiO{sub}2 (ST-01, P-25, JRC-01, and JRC-03). The solar energy conversion efficiency (η) of the cell using nanorods/nanoparticles TiO{sub}2 with mesoporous structure was about 7.12% with Jsc of 13.97mA/cm{sup}2, Voc of 0.73V and ff of 0.70; while η of the cell using P-25 reached 5.82% with Jsc of 12.74mA/cm{sup}2, Voc of 0.704V and ff of 0.649.