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| TiO2/PtO-Pt复合膜和SnO2/PtO-Pt复合膜氢敏性能的研究 | |
| 引用本文： | 牟勇燕,杜雪岩,王远,郭洪猷,桂琳琳.TiO2/PtO-Pt复合膜和SnO2/PtO-Pt复合膜氢敏性能的研究[J].化学学报,2003,61(1):8-12. |
| 作者姓名： | 牟勇燕 杜雪岩 王远 郭洪猷 桂琳琳 |
| 作者单位： | 1. 北京化工大学理学院,北京,100029;北京大学物理化学研究所,分子动态与稳态结构国家重点实验室,北京,100871 2. 北京大学物理化学研究所,分子动态与稳态结构国家重点实验室,北京,100871 3. 北京化工大学理学院,北京,100029 |
| 基金项目： | 国家重点基础发展规划项目(No.2000077503)、国家杰出青年科学基金项目(No.29925308)、国家自然科学基金项目(No.90206011)资助. |
| 摘 要： | 将PtO-Pt纳米粒子膜与TiO2，SnO2纳米粒子膜复合，利用PtO-Pt纳米粒子膜作 为插入电极和催化剂，设计并研制出一类新型双层结构复合膜气体传感器。采用 TEM和SEM对薄膜的显微结构进行了表征，对空气中4.0H2的氢敏性能研究表明： 200℃时，TiO2/PtO-Pt复合膜对氢气的灵敏度为70％，而TiO2纳米粒子膜无响应。 100℃时，SnO2/PtO-Pt复合膜的灵敏度为92％，同样条件下，SnO2纳米粒子膜的灵 敏度仅为4％。说明PtO-Pt纳米粒子膜的催化作用能够显著提高TiO2和SnO2的膜氢 敏性能。另外，TiO2/PtO-Pt复合膜和SnO2/PtO-Pt复合膜均对空气中H2有很高的选 择性。 |
| 关 键 词： | 二氧化钛 氧化锡 复合 薄膜 氧化铂 铂 纳米相材料 扫描电子显微镜 透射电子显微术 |
Study on Hydrogen Sensitivities of TiO2/PtO-Pt and SnO2/PtO-Pt Dual-layer Films |
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| Institution: | Faculty of Science,Beijing University of Chemical Technology. Beijing(100029);Peking University State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Physical Chemistry.Beijing(100871);State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Physical Chemistry, Peking University.Beijing(100871) |
| Abstract: | Combining a granular thin film of PtO-Pt with a film of TiO_2 or SnO_2 nanoparticles, we have designed and successfully prepared a new type of hydrogen sensors with a dual-layer structure. Microstructures of the prepared sensors were characterized by TEM and HRSEM. Measurements on the sensitivities of the prepared sensors to 4.0% H_2 in air reveal that the sensitivity of TiO_2/PtO-Pt is about 70% AT 200 ℃, while that of SnO_2/PtO-Pt at 100℃ is up to 92%. The high sensitivities of the prepared dual-layer films sensors at relatively low temperature are derived from the catalytic function of the PtO-Pt granular film. In addition, both TiO_2/PtO-Pt and SnO-2/PtO-Pt show a high selectivity to hydrogen in air. |
| Keywords: | TITANIUM DIOXIDE TIN OXIDE RECOMBINATION THIN FILMS PLATINUM OXIDE PLATINUM NANOPHASE MATERIALS SCANNING ELECTRON MICROSCOPES TRANSMISSION ELECTRON MICROSCOPY |
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