Synthesis of nano-Fe2O3and its photocatalytic degradation for paper mill effluent
1.State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China; 2.College of Chemistry and Chemical Engineering, Xuzhou Normal University, Xuzhou, Jiangsu 221116, China)
Abstract： Highefficiency and low power consumption of wastewater treatment is the key to the papermill wastewater discharge. Semiconductor photocatalytic oxidation technology has great potential applications. Different Fe2O3catalysts for light response were synthesized by solid phase reaction, homogeneous precipitation of reflux and ultrasonichomogeneous process under different drying and calcination conditions. Under the same condition, the influence of synthesis method, drying and calcination conditions to photocatalytic activity were investigated. The photocatalytic degradation effluent from straw pulp and paper mill was studied with the most active Fe2O3. The results show that microwave drying and higher calcination temperature can improve the photoactivity of catalyst. The catalysts prepared by homogeneous precipitation of reflux have better activity than catalysts prepared by other methods. The average diameters of catalysts are all less than 50 nm as observed by using transmission electron microscope and Xray diffraction pattern. The COD removal rate reaches 931％ in the presence of Fe2O3(10 g／L) at pH=3.0 for 3 h under UV light, and the COD of effluent is 72 mg／L, which is in the range of the acceptable values of the government standard. The photoactivity and photocatalytic efficiency are seldom influenced by catalyst reutilization and wastewater dosage.
李爱梅, 杨海真, 朱亦仁. 纳米Fe2O3的制备及其光催化降解造纸废水[J]. 江苏大学学报（自然科学版）, 2010, 31(6): 716-720.
LI Aimei, YANG Haizhen, ZHU Yiren. Synthesis of nano-Fe2O3and its photocatalytic degradation for paper mill effluent[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2010, 31(6): 716-720.
2010, Vol. 31 
