Abstract:

The TiO₂ photocatalyst doped with Ag⁺、Cu²⁺、Fe³⁺，co-doped withAg⁺-Fe³⁺，and Cu²⁺ Fe³⁺ for treatingammonia nitrogen wastewater from coal gasification process have been prepared. The results show that the TiO₂doped with Fe³⁺ has the highest photocatalytic activity when doped with single metal ions. Under the conditions ofUV irradiation 4 h，water temperature 30 ℃，and ventilation volume 0.25 m3/h，the optimal doped quantity of Fe³⁺ is0.001%，and the ammonia nitrogen removal rate 76.4%. The optimal co-doped metal ions is Ag⁺-Fe^{3+，Ag+ 0.05% andFe3+ 0.001%，and the ammonia nitrogen removal rate is 78.92%.}

Key words: metal ion co-doping, TiO₂, coal gasification；ammonia nitrogen

摘要：

制备了Ag⁺、Cu²⁺、Fe³⁺掺杂及Ag⁺-Fe³⁺共掺杂、Cu²⁺ Fe³⁺共掺杂的TiO₂光催化剂，用其处理粉煤制气工艺的氨氮废水。结果表明：单金属离子掺杂时Fe³⁺掺杂TiO₂的催化活性最高，在紫外光照射4 h、温度30 ℃、通气量为0.25 m3/h 的条件下，Fe³⁺的最优掺杂量（Fe³⁺与TiO₂的质量比）为0.001%，其氨氮去除率为76.4%。共掺杂的最优组合为Ag⁺-Fe^{3+，其中Ag+为0.05%，Fe3+为0.001%，氨氮去除率为78.92%。}

关键词: 离子共掺杂, TiO₂, 粉煤制气, 氨氮

CLC Number: 

• X703