High Efficiency Flow-through Air Filter Based On Graphene Aerogel

With the rapid development of the world economy,more and more factories have gradually been established all over the world,and there is an increasing number of private cars in our life.This has caused severe air pollution,especially the fine particles pollution.Air pollution not only poses a problem for the pollution control of various countries,but also poses a great threat to our environment and human physical and mental health.Traditional air filters cannot meet the needs of today's people due to their low efficiency and excessive energy consumption.Therefore,scientists from different countries have developed a series of new-type air filters.These air filters have excellent characteristics such as low energy consumption,high efficiency,sterilization,and high temperature resistance.However,these air filters are often accompanied by high pressure drop while achieving high efficiency.This research introduces electrostatic force to design an air filter to remove fine particulate matter(PM).Graphene aerogels have a high specific surface area,which provides a large number of sites for PM adsorption.The graphene aerogel air filter has outstanding removal efficiency for both non-oily particles and oily particles.Even when the concentration of non-oily particles and oily particles is very high(>10000?g/m~3),the filtration efficiency are 99.9%and 99.6%,respectively.The graphene aerogel air filter maintains high adsorption efficiency while generating only a low pressure drop.In addition,the filter also has excellent performance that can be used repeatedly.After washing ten times,the efficiency of the air filter remains above 99%.In the high temperature or high humidity environment,the adsorption efficiency of the air filter has not been significantly reduced,so it can be used in harsh environments such as fires and haze.The study also tested factors that affected its adsorption efficiency,such as graphene aerogels volumes,air velocity,air humidity,and so on.Since the air filter does not rely on interception to remove PM particles,there is no continuous increase in pressure drop.In addition,this study made deep analyse of the mechanism of the equipment,which will provide a new perspective for researchers in this field.