提高金属氧化物的气体敏感度，达到对苯、甲苯、二甲苯、甲醛国标浓度的检测，可实现气体传感器内置到手机等设备中检测空气污染物，具有重要的市场意义。程序降温下金属氧化物表面的化学吸附氧存在累积效应，可提高化学吸附氧的覆盖度，同时降低与还原性气体的反应活化能，从而大幅提高对还原性气体的敏感性。程序降温下金属氧化物的化学吸附氧累积幅度与基体材料类型(键能)、掺杂(吸附电子能量)、表面改性(氧迁移与溢流)等因素有关。这些因素变量众多，采用传统往复式“制备-表征”的流程筛选材料工作量大，采用组合材料学方法可大幅提高效率。本课题拟以基体材料类型、掺杂、表面改性为变量，采用气敏膜并行合成仪并行合成气敏膜，利用气敏膜高通量性能测试仪高效筛选材料组分，并通过多轮线索材料的筛选和优化，实现对苯、甲苯、二甲苯、甲醛国标浓度的检测，并建立化学吸附氧累积的材料调控机制，获得各材料组分对化学吸附氧累积的“基因”特性。

Improving the gas sensitivity of metal oxide, detecting the GB detection limit of benzene, toluene, xylene, and formaldehyde, has important market meaning to built gas sensor into the phone for the detection of air pollutants. It was found that chemisorbed oxygen could accumulate on metal oxide surface under temperature programmed cooling, increasing oxygen coverage, reducing the activation energy, and improving the sensitivity to the reducing gases. The influence factors of the chemisorbed oxyge accumulation contains the bulk material, doping and surface modification of metal oxide. These factors have so many variables. It is hard to investigate under traditional reciprocating preparation and characterization method. This could be solved under the combinatorial materials approach. In this research, a gas sensing film parallel synthetic instrument and a gas sensitivity high throughput measuring instrument could be used. Bulk material, doping and surface modification are setted as the factors. Through rounds of selection and optimization of cue materials, detecting the GB detection limit of benzene, toluene, xylene, and formaldehyde is aimed. In the material screening process, the material regulation mechanism to the oxyge accumulation, and the genetic characteristics of the material components, are also to be solved.