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摘要:
Novel Fe3O4-decorate hierarchical porous carbon skeleton derived from maize straw(Fe3O4@MSC) was synthesized by a facile co-precipitation process and a calcination process,which was developed as a UV assisted heterogeneous Fenton-like catalyst.The as-synthesized catalysts were characterized via X-ray powder diffraction(XRD),scanning electron microscope(SEM),transmission electron microscope(TEM),Brunauer-Emmet-Teller(BET) and vibrating sample magnetometer(VSM) at room temperature.The morphology and structure analysis revealed that the as-prepared Fe3O4@MSC retained the original pore morphology of the maize straw material.The non-uniform polyhedral Fe3O4 grew on the whole surface of the MSC,which reduced the aggragation of Fe3O4 and provided more active sites to strengthen the UV-assisted Fenton-like reaction.As a result,the tetracycline(TC) degradation efficiency after 40 min reaction and total organic carbon(TOC) removal efficiency after 2 h reaction of Fe3O4@MSC catalyzing UV-Fenton system reached 99.2% and 72.1%,respectively,which were more substantial than those of Fe3O4@MSC/H2O2(31.5% and 2%),UV/H2O2 system(68% and 23.4%) and UV/Fe3O4/H2O2(80% and 37.5%).The electron spin resonance(ESR) results showed that the OH played an important role in the catalytic reaction.A possible degradation pathway of TC was proposed on the basis of the identified intermediates.Overall,the UV assisted heterogeneous Fenton-like process in Fe3O4@MSC improved the cycle of Fe3+/Fe2+ and activated the interfacial catalytic site,which eventually realized the enhancement of degradation and mineralization to tetracycline.
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篇名 Effective Removal of Tetracycline by Using Biochar Supported Fe3O4 as a UV-Fenton Catalyst
来源期刊 高等学校化学研究(英文版) 学科
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年,卷(期) 2019,(1) 所属期刊栏目
研究方向 页码范围 79-84
页数 6页 分类号
字数 语种 英文
DOI 10.1007/s40242-018-8213-z
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高等学校化学研究(英文版)
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1005-9040
22-1183/O6
16开
长春市解放大路117号吉林大学北区图书馆414室
12-170
1984
eng
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