Heterogeneous Fenton catalyzed oxidation of methylene blue by magnetic Fen+@GO
YANG Yuan-xiu1, YAO Chuang1, LIU Hui2, LIU Jian-xin1, HUANG Xian1, TANG Yuan-sheng1
1. Institute of Engineering Technology of Guangdong Province, Guangzhou 510440, China; 2. Department of Environmental Science and Engineering, Zhongkai University of Agricultural and Engineering, Guangzhou 510225, China
Abstract：Magnetic Fen+@GO (MFGO) nanocomposite was prepared by coprecipitation and applied as a heterogeneous Fenton catalyst for catalytic oxidation of methyl blue (MB). The scanning electron microscopy (SEM), High-Resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) indicated that the GO nanosheets were successfully loaded by catalytically active particles (i.e., Fen+, iron oxide). The effects of pH value, initial H2O2 concentration and catalyst dosage on the degradation efficiency were investigated. The degradation efficiencies for the system of H2O2, MFGO and H2O2 with MFGO after 120min reached 7.83%, 25.58% and 99.19%, respectively. The degradation efficiency of MB was 99.90% at the optimal operating conditions of 0.79mol/L H2O2 and 0.75g/L MFGO, pH=8. With the pH ranging from 3to 11, the degradation efficiency of MB was still higher than 99%. Even MFGO was reused for six consecutive runs, the degradation efficiency of MB still reached 95.08%. Furthermore, the novel catalyst was preferable to be utilized in wide pH value and took the advantages in magnetic separation and reuse.
杨远秀, 姚创, 刘晖, 刘建新, 黄弦, 唐源胜. 磁性Fen+@GO非均相Fenton催化氧化亚甲基蓝[J]. 中国环境科学, 2018, 38(5): 1719-1726.
YANG Yuan-xiu, YAO Chuang, LIU Hui, LIU Jian-xin, HUANG Xian, TANG Yuan-sheng. Heterogeneous Fenton catalyzed oxidation of methylene blue by magnetic Fen+@GO. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(5): 1719-1726.
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