| 聚吡咯/二氧化锡杂化材料的制备及气敏性研究 |
| Preparation and Gas Sensitivity Study of Polypyrrole/Tin Oxide Hybrid Material |
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| 摘要: 化学氧化法制备了聚吡咯(PPy)，并进行了元素分析、TG-DTA分析、FTIR测试。讨论了氧化剂用量对PPy气敏性的影响。用机械共混法制备了含不同聚吡咯的聚吡咯/二氧化锡杂化材料，研究其低温下对有毒气体NH3、H2S、NO的敏感性。结果表明，相同条件下聚吡咯/二氧化锡杂化材料的气敏性和稳定性均优于聚吡咯、二氧化锡。60 ℃时，当聚吡咯/二氧化锡杂化材料中聚吡咯的质量分数为5%时，其对体积分数为0.05%的H2S的灵敏度(Vg/ Va)达到了104.52，且响应恢复时间短。文章讨论了气体与敏感元件的相互作用机制。这一研究有助于开发低能耗、灵敏度高的气敏元件。 |
| 关键词: 聚吡咯 二氧化锡 杂化材料 气敏性 气敏元件 |
| 基金项目: |
| Abstract: Polypyrrole (PPy) was prepared by chemical oxidation polymerization and characterized by elemental analysis, TG-DTA and FTIR. The influence of oxidant amount on PPy gas sensitivity was discussed. PPy/SnO2 hybrid materials with different PPy content were prepared by mechanical mixing, and the sensitivities of the hybrids to toxic gases NH3, H2S, NO at low temperature were studied. The result showed that the sensitivity and stability of the hybrid materials were superior to those of PPy and SnO2 under the same conditions. At 60℃, the sensitivity of PPy/SnO2 containing 5%PPy by mass to 0.05% H2S by volume reached to 104.52, and the response-recovery time was very short. The interaction mechanism between gases and sensors was also discussed. |
| Keywords: polypyrrole tin oxide hybrid material gas sensitivity gas sensor |
| 投稿时间：2004-11-08 修订日期：2005-01-23 |
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| 耿丽娜,王淑荣,李鹏,赵英强,张守民,吴世华.聚吡咯/二氧化锡杂化材料的制备及气敏性研究[J].无机化学学报,2005,21(7):977-981. |
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