Rh掺杂SnO₂纳米纤维的制备及气敏性能研究

Preparation of Rh-Doped SnO₂ Nanofibers and Study on Gas Sensitivity

摘要: 采用静电纺丝技术制备了未掺杂和Rh掺杂的SnO₂纳米纤维。经过Rh的掺杂处理，仍保持着纤维状的形态特征。随后，我们对这些纳米纤维的气敏性能进行了深入且系统的研究。实验结果表明，相较于未掺杂的SnO₂纳米纤维，Rh掺杂的SnO₂纳米纤维对100 ppm丙酮的响应显著提升，达到了90.54%，这一数值是未掺杂的3倍。此外，值得注意的是，Rh掺杂的SnO₂纳米纤维对乙醇的交叉响应有所降低，显示出更高的选择性，而纯SnO₂纳米纤维则无法有效区分乙醇和丙酮气体，缺乏选择性检测能力。

Abstract: Undoped and Rh-doped SnO₂ nanofibers were prepared by electrostatic spinning technique. After Rh doping treatment, the fibrous morphological characteristics were still maintained. Subsequently, we conducted an in-depth and systematic study on the gas-sensitive properties of these nanofibers. The experimental results showed that compared with the undoped SnO₂ nanofibers, the response of Rh-doped SnO₂ nanofibers to 100 ppm acetone was significantly enhanced to 90.54%, a value three times higher than that of the undoped ones. In addition, it is worth noting that the Rh-doped SnO₂ nanofibers showed a reduced cross response to ethanol, showing higher selectivity, whereas the pure SnO₂ nanofibers were unable to effectively differentiate between ethanol and acetone gases, and lacked the ability to selectively detect them.