论文部分内容阅读
采用化学氧化法制备了水溶性聚苯胺(PANI),用溶胶-凝胶法制备了SmBaCu1-yMnyO5+δ(y=0,0.1,0.2,0.3,0.4,0.5,0.6)(SBCM)粉体,用微粒填充法制备了PANI/SBCM复合材料。利用FT-IR、XRD、TEM多种手段对产物进行表征,并制成气敏元件,在室温操作温度下测试其对氨气的灵敏度。结果表明,在相同条件下,在PANI元件、SBCM元件及PANI/SBCM元件气敏测试中,PANI/SmBaCu0.7Mn0.3O5+δ(PANI/SBC70M30)元件对氨气的气敏性能最优,对体积分数为100×10–6的NH3灵敏度在室温条件下达到最大值为4.66,同时还具有较好的选择性、响应-恢复特性与稳定性,响应时间和恢复时间分别为16和121s。
Water-soluble polyaniline (PANI) was prepared by chemical oxidation method and SmBaCu1-yMnyO5 + δ (y = 0,0.1,0.2,0.3,0.4,0.5,0.6) (SBCM) powders were prepared by sol-gel method. PANI / SBCM composites were prepared by the particle filling method. The products were characterized by means of FT-IR, XRD and TEM, and made into gas sensors. The sensitivity to ammonia at room temperature was tested. The results show that PANI / SmBaCu0.7Mn0.3O5 + δ (PANI / SBC70M30) has the best gas sensing performance for ammonia under the same conditions in the gas sensing of PANI, SBCM and PANI / SBCM devices. The NH3 sensitivity of 100 × 10-6 has a maximum of 4.66 at room temperature with good selectivity, response-recovery characteristics and stability. The response time and recovery time are 16 and 121 s respectively.