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化学学报
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化学学报 ›› 2003, Vol. 61 ›› Issue (1): 8-12. 上一篇    下一篇

研究论文

TiO2/PtO-Pt复合膜和SnO2/PtO-Pt复合膜氢敏性能的研究

牟勇燕;杜雪岩;王远;郭洪猷;桂琳琳   

  1. 北京化工大学理学院.北京(100029);北京大学物理化学研究所.北京(100871)
  • 发布日期:2003-01-15

Study on Hydrogen Sensitivities of TiO_2/PtO-Pt and SnO_2/PtO-Pt Dual-layer Films

Mu YongYan;Du XueYan;Wang Yuan;Guo HongYou;Gui LinLin   

  1. 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)
  • Published:2003-01-15

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392

被引次数

47 | 6

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

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.

Key words: TITANIUM DIOXIDE, TIN OXIDE, RECOMBINATION, THIN FILMS, PLATINUM OXIDE, PLATINUM, NANOPHASE MATERIALS, SCANNING ELECTRON MICROSCOPES, TRANSMISSION ELECTRON MICROSCOPY

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