【作者】：Liu C (Liu Chang),Gao HY (Gao Hongyu),Wang LW (Wang Liwei),Wang TS (Wang Tianshuang),Yang XL (Yang Xueli),Sun P* (Sun Peng),Gao Y (Gao Yuan),Liang XS (Liang Xishuang),Liu FM (Liu Fengmin),Song HW (Song Hongwei),Lu GY *(Lu Geyu)
【题目】：Facile synthesis and the enhanced sensing properties of Pt-loaded alpha-Fe2O3. porous nanospheres
【关键词】：Facile method,α-Fe2O3,Pt loading,Porous nanospheres,Gas sensor
【版面信息】：SENSORS AND ACTUATORS B-CHEMICAL 252 (2017) 1153-1162
摘要:
In this work, the pure and Pt-loadedα-Fe2O3porous nanospheres with uniform size were synthesized by a simple two-step process at low temperature. Various methods were employed to characterize the structure and morphology of the as-obtained products. Furthermore, as the sensing materials of oxide semiconductors gas sensor, their sensing properties were investigated systematically. Compared with pureα-Fe2O3samples, the sensor based on 1.0 at.% Pt-loadedα-Fe2O3nanospheres exhibited lower operating temperature, higher response and good selectivity to acetone. Meanwhile, the detection limit could extend down to ppb level. The improvement of acetone-sensing properties is not only attributed to the effective utility of the well-dispersed porous structures, but also due to the dramatic sensitization of the additional Pt components.
