Adsorption materials for volatile organic compounds (VOCs) and the key factors for VOCs adsorption process: A review

[Display omitted] •The VOCs adsorption performance of different adsorbents were summarized.•The controlling factors of VOCs adsorption on adsorbent materials were explored.•Methods for increasing the adsorption capacity were demonstrated.•ACs and MOFs are good adsorption materials for the reduction of VOCs emission. Volatile organic compounds are harmful to the environment and human health. Adsorption technology has been used to VOCs abatement for over 30 years and has proven to be an effective technology. This work provides a critical review of the recent research developments of VOCs adsorption materials and the key factors controlling the VOCs adsorption process. The average specific surface area, pore volume and VOCs adsorption capacity of different adsorption materials are metal organic frameworks (MOFs) > activated carbons (ACs) > hypercrosslinked polymeric resin (HPR) > zeolites. The mechanism of VOCs adsorption in adsorbent mainly includes electrostatic attraction, interaction between polar VOCs and hydrophilic sites, interaction between non-polar VOCs and hydrophobic sites, and partition in non-carbonized portion. With the specific surface area, pore volume, and surface chemical functional groups increase and the pore size decreases, the adsorption capacity increases. The volume of narrow micropores (size