Enhanced photocatalytic properties of ZnO/reduced graphene oxide sheets (rGO) composites with controllable morphology and composition
Enhanced photocatalytic properties of ZnO/reduced graphene oxide sheets (rGO) composites with controllable morphology and composition
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具有可控形貌和成分的 ZnO/还原氧化石墨烯片 (rGO) 复合材料的增强光催化性能
DOI：
10.1016/j.apsusc.2017.03.207
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发表时间：
2017-08
影响因子：
6.7
通讯作者：
Wu Wenhua
中科院分区：
文献类型：
--
作者：
Zhao Yanting;Liu Lin;Cui Tingting;Tong Guoxiu;Wu Wenhua
采用一步低温化学刻蚀法制备了不同形貌和含量的ZnO修饰还原氧化石墨烯（rGO）片，以提高其光催化性能。通过改变老化时间、加热方式和rGO添加量，调节ZnO/rGO复合材料中ZnO的形貌和含量。在ZnO/rGO复合材料中观察到形状和含量依赖的光学和光催化性能。适量的ZnO纳米环（NR）修饰rGO可以显著提高光吸收和光致发光发射，分别是由于等离子共振吸收和等离子纳米天线辐射。ZnO含量为29.54 wt.%的ZnO NR/rGO复合材料表现出最佳的光催化活性，其表观速率常数为0.025 min-1，显著高于纯rGO（0.0085 min-1）和ZnO NR（0.018 min-1）。改进的性能归因于增强的吸附能力、等离子体光吸收、等离子体纳米天线辐射以及光生电子-空穴对的寿命延长的协同效应。我们的研究结果不仅提供了对ZnO NR/rGO复合材料的等离子体增强的光学和光催化性能的见解，但也提出了制备具有增强性能的ZnO NR/rGO光催化剂的可能性。
ZnO with various morphologies and contents was used to decorate reduced graphene oxide (rGO) sheets via an easy one-step low-temperature chemical etching route to improve photocatalytic properties. The ZnO shape and content in ZnO/rGO composites were adjusted by changing aging time, heating mode, and rGO mass added. Shape and content-dependent optical and photocatalytic properties are observed in ZnO/rGO composites. A moderate amount of ZnO nanorings (NRs) decorated with rGO can significantly improve the light absorption and photo-luminescence emission because of plasmonic resonant absorption and plasmonic nanoantenna radiation, respectively. ZnO NR/rGO composites with a moderate ZnO content of 29.54 wt.% exhibit the optimum photocatalytic activity with a 0.025 min−1apparent rate constant, which is significantly higher than those of pure rGO (0.0085 min−1) and ZnO NRs (0.018 min−1). The improved performance is ascribed to the synergistic effect of enhanced adsorption capacity, plasmonic light absorption, plasmonic nanoantenna radiation, and the prolonged lifetime of photogenerated electron-hole pairs. Our findings not only offer insights into the plasmon enhanced optical and photocatalytic properties of ZnO NR/rGO composites but also suggest the possibility of fabricating ZnO NR/rGO photocatalyst with enhanced performance.
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影响因子：
8.6
作者：
Yu, JC;Yu, JG;Zhang, LZ
通讯作者：
Zhang, LZ
影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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DOI：
10.1016/j.colsurfa.2008.07.018
发表时间：
2008-11
影响因子：
5.2
作者：
Li, Yunfeng;Zhang, Kai;Sun, Zhiqiang;Wang, Yanfang;Zhang, Junhu;Yang, Bai;Chen, Xiaolu
通讯作者：
Chen, Xiaolu
影响因子：
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作者：
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通讯作者：
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