Abstract
TiO2 nanobelts (TiO2NBs) were successfully prepared using a solvothermal route via Ti foil as substrate in large scales. The morphology evolution process and formation mechanism of the as-obtained products were investigated in detail. On the basis of this novel structure, chemical sensitive Ag modified TiO2NBs nanocomposites (AgTiO2NBs) were fabricated. It was found that AgTiO2NBs exhibit strong light absorption and efficient electron transport. According to Mott-Schottky analysis, AgTiO2NBs show less surface trapping sites compared with TiO2NBs. The AgTiO2NBs photoanode fabricated in 0.01 M AgNO3 demonstrates the best performance with a short-circuit current of 11.9 mA cm−2 corresponding to a photoelectric conversion efficiency of 4.89%, which is higher than that of pure TiO2NBs based solar cell by 60%.
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