Pt原子修饰棒状二氧化锡的制备及其氢气敏感性能
PDF下载 (226)徐甲强,贾 欣,张子旋.Pt原子修饰棒状二氧化锡的制备及其氢气敏感性能[J].宁波大学学报(理工版),2025,38(6):22-30.DOI:10.20098/j.cnki.1001-5132.2025.0609
XU Jiaqiang,JIA Xin,ZHANG Zixuan.Synthesis and hydrogen-sensing performance of Pt-modified SnO2 nanorods[J].Journal of Ningbo University(Natural Science & Engineering Edition),2025,38(6):22-30.DOI:10.20098/j.cnki.1001-5132.2025.0609
| Title: | Synthesis and hydrogen-sensing performance of Pt-modified SnO2 nanorods |
| 作者: | 徐甲强, 贾 欣, 张子旋 |
| Author(s): | XU Jiaqiang, JIA Xin, ZHANG Zixuan |
| 关键词: | 棒状SnO2; 贵金属修饰; 氢气传感器; Pt单原子 |
| Keywords: | SnO2 nanorods; precious metal modification; H2 sensor; single Pt atom |
| 分类号: | X834 |
| DOI: | 10.20098/j.cnki.1001-5132.2025.0609 |
| 文献标识码: | A |
| 摘要: | 采用一步水热法合成了纳米棒组成的SnO2纳米花，并用高温还原法合成了不同分散状态的Pt-SnO2复合材料。采用XRD、HRTEM和XPS等表征技术对Pt原子在复合材料表面的分散状态进行了解析。将复合材料构建为MEMS气体传感器并评估了其氢敏性能，结果显示原子级分散的Pt atm-SnO2材料氢敏性能最佳，其最佳工作温度为250℃，从纯相SnO2的310℃降低了60℃，在最佳工作温度下对氢气的检测限低达5×10–6，对200×10–6体积分数氢气的响应值为3.81，且响应时间为7.2s，恢复时间为4.8s。相比于纯相的SnO2和Pt NPs（纳米颗粒）-SnO2，该复合材料在检测限、氢气响应值、响应时间和恢复时间等方面均有显著的改善。 |
| Abstract: | SnO2 nanoflowers composed of nanorods were synthesized via a one-step hydrothermal method. Pt-SnO2 composites were subsequently prepared through a high-temperature reduction process at varying temperatures. The surface dispersion states of Pt atoms in the composites were systematically characterized using X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), and X-ray photoelectron spectroscopy (XPS). The characterized materials were subsequently integrated into MEMS-based gas sensors. Gas-sensing performance evaluation demonstrated that the Pt-SnO2 composite exhibited optimal operation at 250℃, representing a 60℃ reduction compared to that of pristine SnO2 (310℃). At this optimized temperature, the composite achieved a hydrogen detection limit of 5×10–6 with a response value of 3.81 to 200×10–6 H2. The sensor demonstrated rapid response/recovery kinetics, with the characteristic times being 7.2s and 4.8s respectively. Comparative analysis revealed significant improvements in the Pt-SnO2 composite over both pristine SnO2 and Pt NPs-SnO2 counterparts across critical performance metrics such as detection limit, hydrogen response magnitude, response time, and recovery time. |
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| 备注/Memo: | 收稿日期：2025−06−08 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ 基金项目：国家自然科学基金（62401349，62271299） 第一作者：徐甲强，博士/教授，主要研究方向为纳米材料化学与智能传感器。E-mail: xujiaqiang@shu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
