TiO<sub>2</sub>/矿物复合光催化剂降解工业废水中偶氮染料的应用研究

TiO₂/矿物复合光催化剂降解工业废水中偶氮染料的应用研究

摘要: 采用高岭石基纳米TiO₂光催化剂,降解工业废水中的偶氮染料。研究废水初始浓度、催化剂投加量、废水初始pH值以及氧化助剂H₂O₂投加量,对降解脱色率的影响。结果表明,偶氮废水初始浓度为40mg/L,催化剂投加量取1g/50ml废水,废水初始pH值为4,偶氮废水降解4h后,脱色率达到99.2%。添加适量氧化助剂可加快反应速度。该研究表明,TiO₂/矿物复合光催化剂,对偶氮染料具有极好的降解效果。

Abstract: The photocatalytic degradation of azo dye with doped nanometer TiO₂/Kaolinite was investigated.The effects of azo dye initial concentration,dosage of catalyst,solution pH and H₂O₂quantity were discussed.The results showed that when initial concentration of azo dye was 40mg/L,dosage of catalyst 1 g/50ml,solution pH 4,after 4h the decolorization ration could get to 99.2%.Addition of oxidant could accelerate the reaction rate.The research revealed that TiO₂/mineral composite photocatalyst had great effect on degradation for azo dye.