文摘
We report the microstructures and gas-sensing properties of various low dimensional nano-TiO2 prepared by hydrothermal method. In particular, we make a comparison of the ethanol sensing properties among TiO2 nanospheres, nanorods, nanobelts. The obtained nanobelts TiO2 is found to show best sensing performances owing to the largest surface area and porous structure providing many quick passages to absorb and desorb gas, suggesting that the gas sensing properties of nanocrystals can be significantly improved by tailoring the shapes and morphologies of nanocrystals.