Graphene modified iron sludge derived from homogeneous Fenton process as an efficient heterogeneous Fenton catalyst for degradation of organic pollutants
Publication in refereed journal

香港中文大學研究人員
替代計量分析
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其它資訊
摘要Fenton process has emerged as one of the most promising alternative strategies for wastewater treatment. Unfortunately, it is still challenging to deal with iron sludge generated during the process, which is of great importance for practical application. Here, we report a green way to modify iron sludge with low amount (0–2 wt%) of graphene as a heterogeneous Fenton catalyst. XRD, FESEM, TEM, Raman and XPS results suggested that the iron sludge existed as FeOOH particles that were mainly entrapped inside the graphene sheet. BET results confirmed the mesoporous structure of the composites. Under the optimal conditions, the degradation rate of rhodamine B, acid red G and metronidazole by the iron sludge-graphene catalyst reached 99.0%, 98.5% and 91.8%, respectively, within 120 min. Moreover, the as-prepared catalyst exhibited wide pH operating range, excellent stability and reusability. The enhanced heterogeneous Fenton property of the composite as compared to bare iron sludge could be ascribed to the mesoporous structure, increased adsorption ability and the promoted ≡Fe/≡Fe cycle. This work not only provides a new idea of fabricating heterogeneous Fenton catalysts, but may also promote the application of homogeneous Fenton process for wastewater treatment.
著者Guo S., Yuan N., Zhang G., Yu J.
期刊名稱Microporous and Mesoporous Materials
出版年份2017
月份1
日期15
卷號238
出版社Elsevier B.V.
頁次62 - 68
國際標準期刊號1387-1811
電子國際標準期刊號1873-3093
語言美式英語
關鍵詞Degradation, Fenton, Iron sludge, Graphene, Heterogeneous

上次更新時間 2021-01-03 於 01:29