用于非均相类 Fenton 反应的石墨烯氧化物-四氧化三铁纳米复合材料的结构和功能研究。
Structural and functional investigation of graphene oxide-Fe3O4 nanocomposites for the heterogeneous Fenton-like reaction.
机构信息
1] The University of Queensland, FIMLab-Films and Inorganic Membrane Laboratory, School of Chemical Engineering, Brisbane, Qld 4072, Australia [2] Universiti Teknologi MARA (UiTM), Faculty of Chemical Engineering, 13500 Pulau Pinang, Malaysia.
The University of Queensland, FIMLab-Films and Inorganic Membrane Laboratory, School of Chemical Engineering, Brisbane, Qld 4072, Australia.
出版信息
Sci Rep. 2014 Apr 4;4:4594. doi: 10.1038/srep04594.
Graphene oxide-iron oxide (GO-Fe3O4) nanocomposites were synthesised by co-precipitating iron salts onto GO sheets in basic solution. The results showed that formation of two distinct structures was dependent upon the GO loading. The first structure corresponds to a low GO loading up to 10 wt%, associated with the beneficial intercalation of GO within Fe3O4 nanoparticles and resulting in higher surface area up to 409 m(2) g(-1). High GO loading beyond 10 wt% led to the aggregation of Fe3O4 nanoparticles and the undesirable stacking of GO sheets. The presence of strong interfacial interactions (Fe-O-C bonds) between both components at low GO loading lead to 20% higher degradation of Acid Orange 7 than the Fe3O4 nanoparticles in heterogeneous Fenton-like reaction. This behaviour was attributed to synergistic structural and functional effect of the combined GO and Fe3O4 nanoparticles.
氧化石墨烯-氧化铁（GO-Fe3O4）纳米复合材料是通过在碱性溶液中将铁盐共沉淀到 GO 片上合成的。结果表明，两种不同结构的形成取决于 GO 的负载量。第一种结构对应于低 GO 负载量，高达 10wt%，与 GO 在 Fe3O4 纳米颗粒中的有益插层有关，并导致高达 409m2g-1的更高表面积。高 GO 负载量超过 10wt%会导致 Fe3O4 纳米颗粒的聚集和 GO 片的不期望堆叠。在低 GO 负载量下，两种组分之间存在强界面相互作用（Fe-O-C 键），导致在非均相类 Fenton 反应中，AO7 的降解率比 Fe3O4 纳米颗粒高 20%。这种行为归因于 GO 和 Fe3O4 纳米颗粒的协同结构和功能效应。
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