摘要
以苯胺与二氧化锡(SnO_2)为前体,通过将原位化学氧化聚合法与静电吸附相结合,在柔性衬底聚酰亚胺(PI)上制备了聚苯胺-二氧化锡(PANI-SnO_2)复合薄膜。通过傅里叶红外光谱(FTIR)、扫描电子显微镜(SEM)与X射线衍射(XRD)对复合薄膜的结构与形貌进行表征,证实了PANI-SnO_2的成功合成与复合。对其在室温条件下进行了一系列气敏性能测试,结果表明SnO_2的添加有效提升了PANI对氨气(NH_3)的响应能力;该PANI-SnO_2复合薄膜对体积分数为1×10~(-5)~6×10~(-5)的NH_3具有良好的灵敏度,此外,该复合薄膜具有良好的重复性与选择性;而且在进行弯折处理后,PANI-SnO_2对NH_3的响应值并无明显变化。上述结果都表明PANI-SnO_2复合薄膜对NH_3的检测具有实际应用价值。
With aniline and tin dioxide(SnO_2)as precursor,the polyaniline-tin dioxide(PANISnO_2)composite film was prepared on a flexible substrate polyimide(PI)by combining the insitu chemical oxidation polymerization with electrostatic adsorption method.The structure and morphology of the composite film were characterized by Fourier transform infrared spectroscopy(FTIR),scanning electron microscope(SEM)and X-ray diffraction(XRD),confirming the successful synthesis and combination of the PANI-SnO_2.A series of gas sensing tests were carried out at room temperature.The results indicate that the addition of SnO_2 effectively improves the response of PANI to ammonia(NH_3).The composite film has a good sensitivity to ammonia gas with the volume fraction of 1×10~(-5)~6×10~(-5).Furthermore,the PANI-SnO_2 composite film has good repeatability and selectivity.After bending treatment,the response of the PANI-SnO_2 to NH_3 does not change significantly.All results indicate that the PANI-SnO_2 composite film has practical application value for detecting NH_3.
引文
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