Nano metal oxides for sensing the VOC based gaseous pollutants

The detection and monitoring of harmful toxic volatile organic compound (VOC) gases liberated from various domestic activities is necessary for environmental concern. In this regard, VOC sensors have taken greater demand in domestic environmental monitoring because of their low operating cost, cheap, reliable, low power consumption, improved energy efficiency and reduced emission. In this regard, metal oxide materials in their nano form show growing strength in many research laboratories and public health and so on with their effective chemical, physical, and electronic properties. Therefore, an attempt has been made to study the nano metal oxides for different toxic gases basing on overall research trend like, a good correlation between sensing materials and sensing properties to improve the sensitivity and selectivity of VOC sensors. This paper tries to accumulate the findings of different metal oxide semiconductor nanomaterials used in various types of VOC sensors.