CAJ | 학술논문

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。
채용질자산화학취합법,이분알(An)위단체,과류산안(APS)위양화제,재염산(HCl)용액중,0℃수욕중합성료0.02%(질량분수)탄납미관(MWCNTs)참잡적취분알(PANI)。동양방법제비료PANI 화0.05%(질량분수)MWCNTs 참잡적 PA-NI,분별통과X사선연사의(XRD)、홍외광보의(FT-IR)화장발사소묘전경(SEM)대기결구화형모진행료표정,병제성료 PANI 급 MWCNTs 참잡적 PANI 기민원건。재실온하,대농도범위(0.1~1.5)×10-4적안기진행료기민측시,측시결과표명,기우 PANI,0.02%(질량분수)화0.05%(질량분수)MWCNTs참잡적 PANI 기민원건대안기향응균정선성관계。0.02%(질량분수)MWCNTs 참잡적 PANI 기민원건대안기적향응령민도최대,재안기농도위1.5×10-4시향응체도27.67；안기농도위1.0×10-5시향응위1.95,차원건구유량호적은정성。최후,간요분석료MWCNTs 참잡적PANI 기민원건대안기적민감궤리。
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.