LAUSR

Abstract Effective removal of ammonia from air at room temperature is rarely reported by photocatalysis, PEC (photo-electro-catalysis) or PEC-MFC (microbial fuel cell), but realized by a Sn-doped V2O5 nanocatalyst. The doping ratio of Sn influenced catalytic activity and 1 wt%Sn-V2O5 exhibited optimal degradation (96.4% NH3) and competitive stability. By integrating PC with electro-catalysis and microbial fuel cells, the removal is enhanced (nearly complete ammonia removal). The structural and electronic properties of the Sn-doped V2O5, effect of Sn doping, the active species for ammonia degradation are investigated. The Sn-doping decreased the size of the nanoparticles and increased the oxidizing capacity and number of active sites. Oxygen vacancies played key roles in ammonia oxidation. This research provides an innovative and stable room temperature catalyst for air purification and malodor control.