Air Purifiers

How does ozone work? I am making a ozone purifier that should clean exhaust fumes for a school project………so can u please explain..i already know a little bit

My one year old little girl has had a lot of problems breathing. She has been in the hospital at least twice because she has difficulty breathing. The doctors told us that she has bronchalitis. They will not diagnose her with asthma yet because she is too young. I have recently finished an environmental science class and with that new insight I believe that an air purifier will help her with breathing, at least when she sleeps. My wife is a little more skeptic on the issues. She doesnt believe that an air purifier will necessarily help our daughter. She is worried that the air purifier will put out more pollutants in to the air then it takes out. I have been looking into air purifiers with a three filter combination (pre-filter, carbon filter, and hepa filter) to maximize the purification. We will not be getting an ozone purifier or an ion purifier do to the chance that extra ozone will be put into the air from the purifier. Thank you for any help you can give.