NiFe2O4对刚果红的光催化降解性能研究

采用水热法合成了尖晶石型NiFe₂O₄,并利用X射线粉末衍射仪对其物相进行了表征,利用紫外-可见分光光度计对其光催化降解刚果红的性能进行了研究。以刚果红为光催化降解底物,探究了刚果红初始浓度、催化剂用量、溶液pH、不同光源等因素对NiFe₂O₄光催化降解刚果红活性的影响。结果表明,当刚果红溶液浓度为20 mg/L、催化剂NiFe₂O₄的用量为0.065 g、pH 2~10、在太阳光下照射480 min时,刚果红的降解率高达99%以上,催化剂性能稳定,适合处理刚果红类有机污染物。

Study on photocatalytic degradation of Congo red by NiFe2O4

Spinel NiFe₂O₄ was synthesized by hydrothermal method,and its phase was characterized by X-ray powder diffractometer.The photocatalytic degradation of Congo red with NiFe₂O₄ was studied by ultravioletvisible spectrophotometer.The influence of initial concentration of Congo red,catalyst dosage,pH value of solution,and different light sources on photocatalytic degradation of Congo red were investigated.The results showed that when the concentration of Congo red solution was 20 mg/L,the amount of catalyst was 0.065 g,the pH was 2~10,and the irradiation time was 480 min,,the degradation rate of Congo red was more than 99%.The catalyst is stable and suitable for treating Congo red organic pollutants.