采用介质阻挡放电等离子体结合TiO2光催化剂降解甲醛气体，在不同的放电电压下考察了催化剂载体、焙烧温度以及过渡金属离子掺杂对甲醛降解效果的影响。结果表明：TiO2/γ-Al2O3光催化剂的填充能显著提高甲醛的降解率和产物的选择性；甲醛降解率随放电电压的升高而增大，随焙烧温度的升高而下降，当焙烧温度为400℃、放电电压为20.7 kV时，甲醛降解率高达83.8%；放电等离子体驱动锐钛矿型TiO2对甲醛的降解效率要优于驱动金红石型TiO2；在TiO2上掺杂Mn离子后，甲醛降解率比等离子体单独作用时提高了45.7%，同时其降解产物中CO/CO2比值以及O3生成量分别降低了42.5%和39.4%。

The degradation of formaldehyde via TiO2 photocatalysis coupled with dielectric barrier discharge was investigated, which aimed to reveal the effects of discharge voltage, catalyst support, calcination temperature and transition metal ion-doping on the degradation efficiency of formaldehyde. The results indicated that (1) TiO2/γ-Al2O3 photocatalyst improved the degradation efficiency of formaldehyde and the products selectivity significantly; (2) the degradation rate increased with increasing discharge voltage or decreasing calcination temperature; when the discharge voltage was 20.7kV and the calcination temperature was 400℃, respectively, the degradation rate reached 83.8%; (3) plasma-driven anatase TiO2 system showed the best degradation efficiency compared to the plasma-driven rutile TiO2 system and the plasma-driven mixed crystal system; (4) after Mn ion-doping, the degradation rate increased 45.7% compared to the system with plasma alone, while the ratio of CO/CO2 and O3 concentration decreased about 42.5% and 39.4%.