| 摘 要： | Porous α-Fe_2O_3 nanobelts have been prepared via a solvothermal route and subsequent calcination. The as-prepared nanostructure was characterized by XRD, FESEM, TEM, N_2 adsorption-desorption isotherms, etc. The α-Fe_2O_3 nanobelts presented obvious porous structures with the length of ca. 1～2μm, width of ca. 200～350 nm and thickness of ca. 30～60 nm. It was found that the assistance of inorganic additives played an important role in the shape control of α-Fe_2O_3 nanostructure. The gas-sensing performance of the fabricated sensor based on α-Fe_2O_3 nanobelts sample was also investigated, and the response towards 1000 ppm acetone can reach 24.4. In addition, the gas-sensing conductive mechanism of the sensor was also proposed.
|
