磁性Fe_(3)O_(4)/硅藻土Fenton催化剂的制备及其催化性能

Preparation and catalytic performance of magnetic Fe_(3)O_(4)/diatomite Fenton catalyst

以改性硅藻土为载体,采用共沉淀法制备了磁性Fe_(3)O_(4)/硅藻土Fenton催化剂。利用SEM、FTIR、BET、XRD、VSM等对相关样品进行表征,并研究了所制复合催化剂对亚甲基蓝(MB)的降解性能。结果表明,当复合催化剂的投加量为0.12 g、H_(2)O_(2)使用量为4 mL、pH值为4、反应温度为25℃时,100 mL模拟废水体系中MB的降解率达到98%,并且复合催化剂具有循环使用效率高、易分离回收等优点。

By using modified diatomite as the carrier,the magnetic Fe_(3)O_(4)/diatomite Fenton catalyst was prepared via co-precipitation method.The relevant samples were characterized with the aid of SEM,FTIR,BET,XRD and VSM,and the degradation of methylene blue(MB)by the as-prepared composite catalyst was studied.The results show that when the dosage of composite catalyst is 0.12 g,the amount of H_(2)O_(2)used is 4 mL,the pH value is 4,and the reaction temperature is 25℃,the degradation rate of MB in 100 mL simulated wastewater system reaches 98%.The composite catalyst has the advantages of high recycling efficiency,easy separation and recovery.