More and more frequent haze days increase the concern over indoor air quality. Traditional indoor air cleaners no longer satisfy the requirements of indoor air purification. Thus, development of novel multifunctional air cleaners and comprehensive air purification technologies become a major research direction toward improving indoor air quality and meeting new needs of current market. By summarizing recent researches on indoor air cleaners of both at home and abroad, herein we review several novel indoor air cleaners, including new adsorption materials, non- thermal plasma, photocatalytic, catalytic oxidation and multifunctional air cleaners, and analyze their advantages and disadvantages. The main evaluation indexes and methods of novel air cleaners are also summarized, including the evaluation methods for gas pollutants, solid particles and microbial contaminants. An outlook is also made toward the future research directions of indoor air cleaners.

novel air cleaner  /  evaluation indexes  /  test methods