聚吡咯/碳纳米管复合纳米材料的制备、表征及其气敏性能

doi:10.3724/SP.J.1077.2011.00961

无机材料学报 ›› 2011, Vol. 26 ›› Issue (9): 961-968.DOI: 10.3724/SP.J.1077.2011.00961

聚吡咯/碳纳米管复合纳米材料的制备、表征及其气敏性能

王志敏¹, 唐新村^1,2, 肖元化³, 余晓静¹, 张亮¹, 贾殿赠⁴, 谌谷春¹

(1. 中南大学化学化工学院, 长沙 410083; 2. 粉末冶金国家重点实验室, 长沙 410083; 3. 郑州轻工业学院材料与化学工程学院河南省表界面科学重点实验室, 郑州 450002; 4. 新疆大学应用化学研究所, 乌鲁木齐 820046)

收稿日期:2010-11-17 修回日期:2011-01-22 出版日期:2011-09-20 网络出版日期:2011-08-19
作者简介:王志敏(1982-), 男, 硕士研究生. E-mail: Wzm004002@yahoo.com.cn
基金资助:
国家自然科学基金(20876178)

Polypyrrole Coated Carbon Nanotubes: Preparation, Characterization, and Gas-sensing Properties

WANG Zhi-Min¹, TANG Xin-Cun^1,2, XIAO Yuan-Hua³, YU Xiao-Jing¹, ZHANG Liang¹, JIA Dian-Zeng⁴, CHEN Gu-Chun¹

(1. College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China; 2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China; 3. State Laboratory of Surface and Interface Science and Technology, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China; 4. Institute of Applied Chemistry, Xinjiang University, Urumqi 820046, China)

Received:2010-11-17 Revised:2011-01-22 Published:2011-09-20 Online:2011-08-19
Supported by:
National Natural Science Foundation of China (20876178)

摘要/Abstract

摘要： 通过原位化学氧化聚合法成功制备了聚吡咯(PPy)包裹酸处理多壁碳纳米管(F-MWCNTs)的复合材料(PPy/F-MWCNTs). 对所制备的PPy/F-MWCNTs纳米复合材料, 分别采用傅里叶变换红外光谱分析(FT-IR)、紫外-可见漫反射(UV-Vis DRS)、热重分析(TGA)、X射线衍射(XRD)、比表面分析(BET)、场发射扫描电镜(FE-SEM)和透射电镜(TEM)进行表征. 实验结果表明: 在F-MWCNTs表面均匀包覆了一层约25~40nm厚的PPy, PPy/F-MWCNTs的比表面积较单一的聚吡咯提高了近3倍. 基于PPy/F-MWCNTs的气敏元件在室温下对NH₃的气敏性能较单一聚吡咯和碳纳米管具有更高的灵敏度, 更短的响应时间以及更好的稳定性, 其中对体积浓度为200×10^-6的NH₃的灵敏度能达到1.9, 响应时间为135s. 另外与PPy包覆未经酸处理的MWCNTs相比, PPy/F-MWCNTs的灵敏度更高.

关键词: 气敏, 碳纳米管, PPy/F-MWCNTs, 纳米复合材料, 氨气

Abstract: A nanocomposite (PPy/F-MWCNTs) were successfully synthesized by the in-situ chemical oxidation polymerization with acid-treated multi-walled carbon nanotubes (F-MWCNTs) and polypyrroles(PPy). The as-prepared composite was characterized by Fourier transformed infrared spectra (FT-IR), UV-Vis diffuse refflection spectroscope (UV-Vis DRS), thermal gravimetric analysis (TGA), X-ray diffraction (XRD), Branauer- Emmett-Teller analysis (BET), field-emission scanning electron microscope (FE-SEM) and transmission electron microscope (TEM). The results reveal that the F-MWCNTs is well coated with about 25-40nm thick polypyrrole, and the surface specific areas of PPy/F-MWCNTs is about three times than that of pure PPy. The sensors fabricated by PPy/F-MWCNTs exhibit higher sensitivity, better response/reproducibility towards NH₃ vapor at room temperature than that fabricated by pure PPy or F-MWCNTs. The sensitivity is 1.9 even to 200×10^-6 of NH₃and the response time is 135s. In addition, compared with MWCNTs untreated with acid, the as-prepared PPy/F-MWCNTs also exhibits higher sensitivity than that prepared without acid-treated MWCNTs.

Key words: gas sensor, carbon nanotubes, PPy/F-MWCNTs, nanocomposites, NH₃

中图分类号:

TB331

王志敏, 唐新村, 肖元化, 余晓静, 张亮, 贾殿赠, 谌谷春. 聚吡咯/碳纳米管复合纳米材料的制备、表征及其气敏性能[J]. 无机材料学报, 2011, 26(9): 961-968.

WANG Zhi-Min, TANG Xin-Cun, XIAO Yuan-Hua, YU Xiao-Jing, ZHANG Liang, JIA Dian-Zeng, CHEN Gu-Chun. Polypyrrole Coated Carbon Nanotubes: Preparation, Characterization, and Gas-sensing Properties[J]. Journal of Inorganic Materials, 2011, 26(9): 961-968.

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聚吡咯/碳纳米管复合纳米材料的制备、表征及其气敏性能

Polypyrrole Coated Carbon Nanotubes: Preparation, Characterization, and Gas-sensing Properties

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