Li Kun-Lin, Chen Wu-Qiang, Li Xiao-Ting, Yuan Bao-Ling
State Key Laboratory Breeding Base of Photocatalysis, College of Civil Engineering, Fuzhou University, Fuzhou 350108, China.
Huan Jing Ke Xue. 2010 Sep;31(9):2075-9.
In this study the new catalyst Si-FeOOH was synthesized by adding Si to the traditional FeOOH and the mechanic strength of this new catalyst could be enhanced greatly. The photo-degradation of dimethyl phthalate (DMP) by UV/Si-FeOOH/H2O2 was investigated. The new catalyst Si-FeOOH was amorphous structure with high surface area and low soluble iron by XRD, IR and SEM. The efficiency of DMP degradation by UV/Si-FeOOH/H2O2 could reach 97% after 30 min reaction time at pH 5, 0.5 g/L dosage of Si-FeOOH, and 2.0 mmol/L of H2O2 under 125W UV365 irradiation. DMP could be degraded effectively by synergistic effect of UV, Si-FeOOH and H2O2. The Si-FeOOH photocatalyst can be very easily recovered and its catalytic activity also remained after several rounds of reaction.
在本研究中，通过向传统的氢氧化铁中添加硅合成了新型催化剂硅 - 氢氧化铁，该新型催化剂的机械强度可大大提高。研究了紫外光/硅 - 氢氧化铁/过氧化氢体系对邻苯二甲酸二甲酯（DMP）的光降解性能。通过X射线衍射（XRD）、红外光谱（IR）和扫描电子显微镜（SEM）分析表明，新型催化剂硅 - 氢氧化铁为无定形结构，具有高比表面积和低可溶性铁。在pH为5、硅 - 氢氧化铁投加量为0.5 g/L、过氧化氢浓度为2.0 mmol/L以及125W紫外光365照射下，反应30分钟后，紫外光/硅 - 氢氧化铁/过氧化氢体系对DMP的降解效率可达97%。通过紫外光、硅 - 氢氧化铁和过氧化氢的协同作用，DMP能够被有效降解。硅 - 氢氧化铁光催化剂很容易回收，并且经过几轮反应后其催化活性仍然保持。
