| 引用本文: | 江超,李丽,张国,广新颖,史克英.SnO2/C复合材料的制备及NOx气敏研究[J].材料科学与工艺,2011,19(5):54-57,62.DOI:10.11951/j.issn.1005-0299.20110512. |
| JIANG Chao,LI Li,ZHANG Guo,GUANG Xin-ying,SHI Ke-ying.Preparation of SnO2/C composite and NOx gas sensor[J].Materials Science and Technology,2011,19(5):54-57,62.DOI:10.11951/j.issn.1005-0299.20110512. |
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| 摘要: |
| 为制备在室温条件下对NOx的检测具有低检测线、响应迅速、灵敏度高的材料,通过高压静电纺丝法制备了多孔SnO2/C复合材料,采用TEM、SEM、XRD等手段研究了复合材料形貌及结构.研究表明:SnO2/C复合材料表面存在丰富的微孔、介孔和大孔,且以10 nm左右的介孔居多.室温下(16～18℃)对SnO2/C复合材料NOx气敏性的检测研究发现,SnO2/C复合材料对NOx有很好的气敏响应,最低检测体积分数可达0.97×10-7.放置48 h后再重复进行相同浓度的气敏性检测时,复合材料的气敏响应重复性较好.复合材料的气敏机理研究表明,空气中的氧气吸附于多孔SnO2/C复合材料表面,形成的氧负离子有助于提高NOx气敏性能. |
| 关键词: 高压静电纺丝 聚苯乙烯(PS) SnO2/C复合材料 NOx气敏性 |
| DOI：10.11951/j.issn.1005-0299.20110512 |
| 分类号:TB381 |
| 基金项目:国家自然科学基金资助项目(21076066);黑龙江省博士后科研启动基金资助项目(LBH-Q07111). |
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| Preparation of SnO2/C composite and NOx gas sensor |
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JIANG Chao1, LI Li2, ZHANG Guo2, GUANG Xin-ying1, SHI Ke-ying1,2
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1.Key Laboratory of Functional Inorganic Material Chemistry,Ministry of Education,Heilongjiang University, Harbin 150080,China;2.Key Laboratory of Physical and Chemistry,School of Chemistry and Materails Science,Heilongjiang University,Harbin 150080,China
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| Abstract: |
| To study and prepare the material possessing low detection level,fast response and high sensitivity to NOx at room temperature,SnO2/C is synthesized by electrospunning method.The characteristics and morphology of the material are studied by SEM,TEM,XRD.The results show that the surface of the material possesses a wealth of microporous,mesoporous and macroporous,and the majority of the mesoporous is about 10 nm.At room temperature(16~18 ℃),NOx gas sensor test reveals that the composite material which is composed of PS/SnCl2 nanofibers has better sensitivity of NOx than pure SnO2 after calcinations.The volume fraction of the lowest detection is 0.97×10-7,and after 48 h,the reproducibility is also better.The mechanism of gas sensor indicates that O2 in air is adsorbed on the surface of SnO2/C composite,then O-is formecl.It causes that the sensitivity of SnO2/C is improved. |
| Key words: electrospun polystyrene(PS) SnO2/C composite materials NOx gas sensor |
