Degradation　of　toluene　in　a　gas　by　non-thermal　plasma　with　a　ferroelectric　catalyst　was　studied　at　normal　temperature　and　atmospheric　pressure.　Spontaneous　polarization　material　(BaTiO3)　and　photocatalyst　(TiO2)　were　added　into　plasma　system　simultively.　Toluene　degradation　efficiency　and　specific　energy　density　during　the　discharge　process　were　investigated.　Furthermore,　byproducts　and　degradation　mechanisms　of　toluene　were　also　investigated.　The　toluene　degradation　efficiency　increased　when　non-thermal　plasma　technology　was　combined　with　the　catalyst.　The　toluene　degradation　efficiencies　of　the　different　catalysts　tested　were　in　the　following　order:　BaTiO3/TiO2　＞　BaTiO3　＞　TiO2　＞　no　catalyst.　A　mass　ratio　of　2.38:1　was　optimum　for　the　BaTiO3　and　TiO2　catalyst.　The　outlet　gas　was　analyzed　by　gas　chromatography　and　Fourier　transform　infrared　spectroscopy,　and　the　main　compounds　detected　were　CO2,　H2O,　O-3　and　benzene　ring　derivatives.　(C)　2013　Elsevier　Ltd.　All　rights　reserved.