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为降低WO3气敏元件的工作电压,改善WO3基敏感材料的气敏性能,采用化学吸附沉淀-水热法合成WO3和WO3/SWCNT复合材料,并研究矿化剂用量和SWCNT掺杂量对其气敏性能的影响。结果表明,大剂量矿化剂的使用会降低WO3的气敏性能;碳纳米管掺杂可以使WO3在较低的工作温度下有较高的灵敏度。SWCNT掺杂量为1%的元件在2.68V时对体积分数为50×10-6的H2S的灵敏度高达916.90。
In order to reduce the working voltage of WO3 gas sensor and improve the gas sensitivity of WO3-based sensitive materials, WO3 and WO3 / SWCNT composites were synthesized by chemisorption precipitation-hydrothermal method. The effects of mineralizer dosage and SWCNT doping amount Gas sensitivity. The results show that the use of high-dose mineralizer can reduce the gas sensing properties of WO3; the addition of carbon nanotubes can make WO3 have higher sensitivity at lower working temperature. The SWCNT doping amount of 1% of the element at 2.68V when the volume fraction of 50 × 10-6 of H2S sensitivity as high as 916.90.