Synthesis and Characterization of a Novel Ternary Hematite Nanocomposites Structure with Fullerene and 2D‐Electrochemical Reduced Graphene Oxide for Superior Photoelectrochemical Performance
Synthesis and Characterization of a Novel Ternary Hematite Nanocomposites Structure with Fullerene and 2D‐Electrochemical Reduced Graphene Oxide for Superior Photoelectrochemical Performance
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DOI：
10.1002/ppsc.201600216
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发表时间：
2017-01
影响因子：
2.7
通讯作者：
Yi Wen Phuan;M. Chong;Oodaye Satokhee;Andrew Brian De Souza;T. Zhu;E. Chan
中科院分区：
文献类型：
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作者：
Yi Wen Phuan;M. Chong;Oodaye Satokhee;Andrew Brian De Souza;T. Zhu;E. Chan
在这项研究中，一种新型的三元赤铁矿纳米复合材料光阳极结构具有上级光电化学（PEC）性能组成的富勒烯（C60）和2D电化学还原氧化石墨烯（eRGO）作为有效的表面钝化剂。电子清除C60和高导电eRGO两者的引入减轻了赤铁矿的高界面复合速率，并导致PEC性能的上级增强。UV-vis分析表明，C60和eRGO的掺入可以在可见光（400 nm 700 nm）处提供更强的光吸收。通过电化学阻抗谱测量，可以得出结论，在赤铁矿光阳极上引入C60和eRGO改善了电子转移和收集，降低了电荷载流子复合效率，并增强了PEC活性。当与仅裸赤铁矿结构相比时，所得三元赤铁矿光阳极结构表现出光电流密度的16.8倍增强和电荷转移电阻的0.8倍降低。该研究表明，C60、2D-eRGO或其组合作为三元结构的应用提供了可以增强赤铁矿光阳极结构中的PEC性能的等离子体效应。
In this study, a novel ternary hematite nanocomposites photoanode structure with superior photoelectrochemical (PEC) performance consisting of fullerene (C60) and 2D‐electrochemical reduced graphene oxide (eRGO) used as the effective surface passivators is developed. The introduction of both the electron scavenging C60 and highly conducting eRGO has mitigated the high interfacial recombination rate of hematite and led to the superior enhancement in PEC performance. UV–vis analysis reveals that the incorporation of C60 and eRGO can provide a stronger light absorption at the visible light (400 nm 700 nm). Through the electrochemical impedance spectroscopy measurements, it can be concluded that the introduction of C60 and eRGO onto hematite photoanode improves electron transfer and collection, reduces charge‐carrier recombination efficiency, and enhances PEC activity. The resultant ternary hematite photoanode structure exhibits 16.8‐fold enhancement in photocurrent density and 0.8‐fold reduction in charge transfer resistance when compared to the bare hematite structure only. This study has shown that the application of C60, 2D‐eRGO, or in combination as a ternary structure provides the plasmonic effect that can enhance the PEC performance in hematite photoanode structure.