采用质子酸化学聚合法,以苯胺(An)为单体,过硫酸铵(APS)为氧化剂,在盐酸(HCl)溶液中,0℃水浴中合成了0.02%(质量分数)碳纳米管(MWCNTs)掺杂的聚苯胺(PANI)。同样方法制备了PANI 和0.05%(质量分数)MWCNTs 掺杂的 PA-NI,分别通过X射线衍射仪(XRD)、红外光谱仪(FT-IR)和场发射扫描电镜(SEM)对其结构和形貌进行了表征,并制成了 PANI 及 MWCNTs 掺杂的 PANI 气敏元件。在室温下,对浓度范围(0.1~1.5)×10-4的氨气进行了气敏测试,测试结果表明,基于 PANI,0.02%(质量分数)和0.05%(质量分数)MWCNTs掺杂的 PANI 气敏元件对氨气响应均呈线性关系。0.02%(质量分数)MWCNTs 掺杂的 PANI 气敏元件对氨气的响应灵敏度最大,在氨气浓度为1.5×10-4时响应达到27.67；氨气浓度为1.0×10-5时响应为1.95,且元件具有良好的稳定性。最后,简要分析了MWCNTs 掺杂的PANI 气敏元件对氨气的敏感机理。
0.02wt% multi-wall carbon nanotubes (MWCNTs)doped polyaniline (PANI)nanopowders were prepared by chemical polymerization of protonic acid method in 0℃ water bath.The PANI and 0.05wt%MWCNTs-doped PANI nanopowders were prepared by the same way.The morphology and structure of PANI, MWCNTs-doped PANI nanopowders were analyzed by XRD,FT-IR and SEM.Gas sensors were fabricated based on PANI,0.02wt% MWCNTs-doped PANI and 0.05wt% MWCNTs-doped PANI.The response sensi-tivity of gas sensors to NH3 was measured in NH3 concentration range of (0.1-1.5)×10-4.The response curves of three gas sensors were basically linearity.The response sensitivity of the gas sensor based on 0.02wt% MWCNTs-doped PANI was the highest,the responses were 27.65 and 1.94 for 1.5×10-4 NH3 and 1.0×10-5 NH3 ,respectively.The stability of the gas sensor based on 0.02wt% MWCNTs-doped PANI was tested,and the sensor showed good stability in three months.The sensing mechanism of MWCNTs-doped PA-NI gas sensor was analyzed.
参考文献
| [1] | Ito T;Shirakawa H;Ikeda S .Simultaneous polymeriza-tion and formation of polyacetylene film on the surface of concentrated soluble Ziegler-type catalyst solution Journal polymer science[J].Polymer Chemistry Edition,1974,12:11-20. |
| [2] | Shirakawa H;Ikeda S;Aizawa M et al.Ployacetylene film:a new electrode material for photoenergy conversion[J].Synthetic Metals,1981,4:43-49. |
| [3] | M.M. Ayad;N.A. Salahuddin;M.O. Alghaysh;R.M. Issa .Phosphoric acid and pH sensors based on polyaniline films[J].Current applied physics: the official journal of the Korean Physical Society,2010(1):235-240. |
| [4] | Suri Komilla;Annapoorni S;Sarkar A K et al.Gas and humidity sensors based on iron oxide-polypyrrole nano-coomposite[J].Sensors and Actuators B-Chemical,2002,81:277-282. |
| [5] | M.K. Ram;O. Yavuz;M. Aldissi .NO_2 gas sensing based on ordered ultrathin films of conducting polymer and its nanocomposite[J].Synthetic Metals,2005(1):77-84. |
| [6] | Prasad GK;Radhakrishnan TP;Kumar DS;Krishna MG .Ammonia sensing characteristics of thin film based on polyelectrolyte templated polyaniline[J].Sensors and Actuators, B. Chemical,2005(2):626-631. |
| [7] | 冯晓苗.聚苯胺纳米纤维的合成及其在生物传感器中的应用[J].功能材料,2010(07):1250-1252. |
| [8] | Habiba Bejbouji;Laurence Vignau;Jean Louis Miane;Minh-Trung Dang;El Mostafa Oualim;Mohammed Harmouchi;Azeddine Mouhsen .Polyaniline as a hole injection layer on organic photovoltaic cells[J].Solar Energy Materials and Solar Cells: An International Journal Devoted to Photovoltaic, Photothermal, and Photochemical Solar Energy Conversion,2010(2):176-181. |
| [9] | Radushkevich L V;Lukyanovich V M .About the struc-ture of carbon formed by thermal decomposition of carbon monoxide on iron substrate[J].Journal of Physical Chemistry,1952,26:88-95. |
| [10] | Ajayan P M;Zhou O Z .Applications of carbon nano-tubes[J].TOPICS IN APPLIED PHYSICS,2001,80:391-425. |
| [11] | U.Vohrer;I.Kolaric;M.H.Haque;S.Roth;U.Detlaff-Weglikowska .Carbon nanotube sheets for the use as artificial muscles[J].Carbon: An International Journal Sponsored by the American Carbon Society,2004(5/6):1159-1164. |
| [12] | Xinyu Zhang;Warren J. Goux;Sanjeev K. Manohar .Synthesis of Polyaniline Nanofibers by "Nanofiber Seeding"[J].Journal of the American Chemical Society,2004(14):4502-4503. |
| [13] | E. Zelikman;R. Y. Suckeveriene;G. Mechrez;M. Narkis .Fabrication of composite polyaniline/CNT nanofibers using an ultrasonically assisted dynamic inverse emulsion polymerization technique[J].Polymers for advanced technologies,2010(2):150-152. |
| [14] | Valter Bavastrello;Enrico Stura;Sandro Carrara;Victor Erokhin;Claudio Nicolini .Poly(2,5-dimethylaniline)-MWNTs nanocomposite: a new material for conductometric acid vapours sensor[J].Sensors and Actuators, B. Chemical,2004(2/3):247-253. |
| [15] | 杜海英,王兢,王娟,孙进生,李双,戚金清.聚苯胺及其掺杂材料的制备及气敏特性的研究[J].功能材料,2011(12):2289-2293. |
| [16] | Chaoqing Bian;Gi Xue .Nanocomposites based on rutile-TiO_2 and polyaniline[J].Materials Letters,2007(6):1299-1302. |
| [17] | Riggs JE.;Carroll DL.;Sun YP.;Guo ZX. .Strong luminescence of solubilized carbon nanotubes[J].Journal of the American Chemical Society,2000(24):5879-5880. |
| [18] | Lifang He;Yong Jia;Fanli Meng .Gas sensors for ammonia detection based on polyaniline-coated multi-wall carbon nanotubes[J].Materials Science & Engineering. B, Solid-State Materials for Advanced Technology,2009(2):76-81. |
| [19] | W. Feng;X. D. Bai;Y. Q. Lian .Well-aligned polyaniline / carbon-nanotube composite films grown by in-situ aniline polymerization[J].Carbon: An International Journal Sponsored by the American Carbon Society,2003(8):1551-1557. |
| [20] | Kukla A L;Shirshov Y M;Piletsky S A .Ammonia sensors based on sensitive polyaniline films[J].Sensors and Actuators B-Chemical,2009,199637:135-140. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%