In recent years, many kinds of literature on the nanotechnology used in medicine, electrochemistry, wastewater treatment and other fields have been reported. It can be highly efficient, economical, multifunctional and reduce the dependence on large treatment equipment when wastewater treatment is processed using nanotechnology. The property of carbon materials designed by nanotechnology can be more suitable for the demand of adsorbent than activated carbon on wastewater treatment. And the different types of carbon nanomaterials have been reported to show different properties and unique adsorption mechanisms. Although the carbon nanomaterials have various advantages in adsorbent, they also have drawbacks that carbon is hydrophobic at the pristine state due to their surface without acidic groups or basic groups. In order to improve the hydrophilicity of the carbon materials, plasma can be Introduced onto the surfaces of carbon and the oxygen plasma developed acidic groups and nitrogen plasma and ammonia plasma developed basic groups. In the other side, the adsorption capacity on phenol can enhance by introducing pyridinic and pyrrolic groups as the basic groups. In this work, The adsorbent - nitrogen doped magnetic mesoporous hollows carbon (N-MMHC) were synthesized through one-pot coating strategy using tetrapropyl-orthosilicate (TPOS), resorcinol, formaldehyde and Fe₂O₃ nanoparticle. Ethylenediamine( EDA) as both catalyst and nitrogen sources in the process.