基于聚苯胺-镍酞菁多孔渗透薄膜的氨气传感器

Gas Sensor Based on Porous Film of Polyaniline / sulfonated Nickel Phthalocyanine Composites for the Detection of Ammonia

利用磺化镍酞菁(NiTSPc)对苯胺(PANI)聚合的催化作用,通过简单的电聚合方法在叉指金电极(IAE)表面合成了PANI/NiTSPc多孔渗透膜.利用扫描电子显微镜(SEM)、原子力显微镜(AFM)、能量色散图谱(EDS)和拉曼光谱对PANI/NiTSPc多孔膜进行表征.在室温下,采用基于PANI/NiTSPc多孔膜制备的传感器对不同浓度(3.8~1900 mg/m^3)的NH_3进行了检测.结果表明,对于76 mg/m^3的NH_3,传感器的灵敏度为2.75,响应时间为10 s,且该传感器具有恢复时间短、重复性及稳定性良好等优点.所制备的PANI/NiTSPc薄膜传感器在NH3检测及电子鼻的应用中具有巨大潜力.

By utilizing the significant catalytic effect of sulfonated nickel phthalocyanine（ Ni TSPc） on the anilinepolymerization,a porous thin film of polyaniline（ PANI） and sulfonated nickel phthalocyanine（ PANI /Ni TSPc） composite was deposited across the gaps of an interdigitated Au electrode（ IAE） by a simple electrochemical polymerization method. The PANI / Ni TSPc porous thin film was characterized by means of scanning electron microscopy（ SEM）,atomic force microscopy（ AFM）,energy dispersive spectrum（ EDS） and Raman spectrum. At room temperature, the ammonia sensing properties of the PANI / Ni TSPc porous thin film prepared at optimum conditions were studied. The sensitivity of the film to 76 mg / m^3 NH3 was up to 2.75 with response time as short as 10 s. In addition,rather fast recovery rate,good reproducibility and long-term stability were also observed in a wide concentration range from 3. 8 to 1900 mg / m^3. Therefore,the proposed PANI / Ni TSPc nanocomposite thin film sensors are highly potential candidates in the field of NH3 detection and electronic nose application in further work.