采用水热法合成MoS2/石墨烯复合材料并制作气敏元件, 进行汞蒸气气敏性质测试。当石墨烯与MoS2的摩尔比为0.5%时, 复合材料对汞蒸气的灵敏度最佳; 在2.18~126.18 mg/m3浓度范围内, 传感器的灵敏度具有良好的线性度; 在汞蒸气浓度29.48 mg/m3条件下, 传感器的响应时间为8.5 min, 恢复时间为9.0 min。传感器具有优良的重复性、稳定性和选择性, 传感器在燃煤电厂烟气常见成分H2S、NH3和NO2三种气体中没有明显的响应, 可以应用于实际检测。

The MoS2/graphene composites were prepared by hydrothermal method. Then the composites were fabricated to gas sensors for exploring the sensing characteristics of mercury vapor. When the molar ratio of graphene and MoS2 was 0.5%, the composites has the best gas sensor response. The concentration in 2.18-126.18 mg/m3 of mercury vapor was tested, and the sensor show excellent linearity. When the concentration of mercury vapor is 29.48 mg/m3, the response time of the sensor is 8.5 min and the recovery time is 9.0 min. The sensor has excellent repeatability, stability and selectivity. Other common gases in coal-fired power plant flue gas such as H2S, NH3 and NO2 has no obvious response, and the sensor can be used for practical detection.