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Fast and effective electron transport in a Augraphene-ZnO hybrid for enhanced photocurrent and photocatalysis

机译:在Augraphene-ZnO杂化物中快速有效地传输电子,以增强光电流和光催化作用

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摘要

A novel ZnO nanosheet aggregated hollow sphere (nSAHS) has been hydrothermally synthesized. Wrapping Au/reduced graphene oxide (Au/rGO) onto the ZnO nSAHS facilitates electron transfer at the ZnO interface. The photoinduced charge transfer of the Au/rGO/ZnO hybrid has been characterized using photoluminescence (PL) and a time-resolved PL decay profile. The quenched PL emission of Au/rGO/ZnO indicates decreased electron-hole pair recombination and facilitated electron transport, which results from the large surface area of the ZnO nSAHS structure, good physical adsorption of Au/rGO onto ZnO, and the excellent chemical interaction at the Au/rGO-ZnO interface. The Au/rGO/ZnO hybrid exhibits fast (4.46 ps) and effective (80.49%) charge transfer at the hybrid interface, indicating that Au/rGO/ZnO has better photocurrent responses and photocatalytic activities than rGO/ZnO and ZnO.
机译:水热合成了新型的ZnO纳米片聚集空心球(nSAHS)。将Au /还原氧化石墨烯(Au / rGO)包装在ZnO上nSAHS促进了ZnO界面上的电子转移。 Au / rGO / ZnO杂化物的光诱导电荷转移已使用光致发光(PL)和时间分辨的PL衰减曲线进行了表征。 Au / rGO / ZnO的PL猝灭表明电子-空穴对的重组减少并促进了电子传输,这是由于ZnO nSAHS结构的大表面积,Au / rGO在ZnO上的良好物理吸附以及出色的化学相互作用所致在Au / rGO-ZnO界面上。 Au / rGO / ZnO杂化物在杂化物界面上表现出快速(4.46 ps)和有效(80.49%)的电荷转移,表明Au / rGO / ZnO比rGO / ZnO和ZnO具有更好的光电流响应和光催化活性。

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