文章基本信息

标题：Rapid degradation of methylene blue in a novel heterogeneous Fe₃O₄ @rGO@TiO₂-catalyzed photo-Fenton system
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作者：Xiaoling Yang ; Wei Chen ; Jianfei Huang 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
DOI：10.1038/srep10632
出版社：Springer Nature
摘要：Herein, a ternary nanocomposite with TiO₂ nanoparticles anchored on reduced graphene oxide (rGO)-encapsulated Fe₃O₄ spheres (Fe₃O₄@rGO@TiO₂) is presented as a high efficient heterogeneous catalyst for photo-Fenton degradation of recalcitrant pollutants under neutral pH. Fe₃O₄@rGO@TiO₂ was synthesized by depositing TiO₂ nanoparticles on the surface of the Fe₃O₄ spheres wrapped by graphene oxide (GO) which was obtained by an electrostatic layer-by-layer method. This as-prepared catalyst reflected good ferromagnetism and superior stability which makes it convenient to be separated and recycled. Due to the synergic effects between the different components composed the catalyst, swift reduction of Fe³⁺ can be achieved to regenerate Fe²⁺. Fe₃O₄@rGO@TiO₂ exhibited enhancing catalytic activity for the degradation of azo-dyes compared with Fe₃O₄, Fe₃O₄@SiO₂@TiO₂ or SiO₂@rGO@TiO₂, further conforming the rapid redox reaction between Fe²⁺ and Fe³⁺. All these merits indicate that the composite catalyst possesses great potential for visible-light driven destruction of organic compounds.