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采用化学氧化法制备了水溶性聚苯胺(PANI),溶胶–凝胶法制备了SmBaCuMO5+δ(M=Cu,Zn;SBCM)粉体,用微粒填充法制备了PANI/SBCM复合材料。利用傅里叶变换红外光谱法(FT-IR)、XRD、TEM对产物进行了分析表征,研究了PANI/SBCM元件的氨敏性能。结果表明,PANI/SBCM元件在室温下对NH3具有良好的灵敏性,同条件下PANI/SmBaCuCuO5+δ(SBCC)元件的氨敏性能优于PANI/SmBaCuZnO5+δ(SBCZ)元件。室温条件下,PANI/SBCC元件对体积分数为100×10–6的NH3的最大灵敏度为7.29,具有高的灵敏度和选择性,且性能稳定。
Water-soluble polyaniline (PANI) was prepared by chemical oxidation method and SmBaCuMO5 + δ (M = Cu, Zn; SBCM) powders were prepared by sol-gel method. PANI / SBCM composites were prepared by particle filling method. The products were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The ammonia sensitivity of PANI / SBCM was studied. The results show that PANI / SBCM has good sensitivity to NH3 at room temperature. The ammonia sensitivity of PANI / SmBaCuCuO5 + δ (SBCC) is better than PANI / SmBaCuZnO5 + δ (SBCZ) under the same conditions. Under room temperature, the maximum sensitivity of PANI / SBCC element to NH3 with volume fraction of 100 × 10-6 is 7.29, which has high sensitivity and selectivity and stable performance.