Significant enhancement of the photoelectrochemical activity of WO3 nanoflakes by carbon quantum dots decoration
Significant enhancement of the photoelectrochemical activity of WO3 nanoflakes by carbon quantum dots decoration
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DOI：
10.1016/j.carbon.2016.04.051
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发表时间：
2016-08
期刊：
影响因子：
10.9
通讯作者：
Weina Shi;Xiaofan Zhang;J. Brillet;Dekang Huang;Man Li;Mingkui Wang;Yan Shen
中科院分区：
文献类型：
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作者：
Weina Shi;Xiaofan Zhang;J. Brillet;Dekang Huang;Man Li;Mingkui Wang;Yan Shen
这项工作报道了用碳量子点 (CQD) 装饰的单晶 WO3 纳米片，用于高效的光电化学能量转换系统。有前途的光电阳极可以通过种子介导的溶剂热方法结合随后的浸渍组装来制造。 1.0 Vvs 下的光电流密度为 1.46 mA cm−2。在 AM 1.5G 照明下，在 1 M H2SO4 溶液中进行线性扫描伏安测量时，CQDs/WO3 电极可以实现 Ag/AgCl，大约是裸 WO3 电极的两倍。光电化学性能的增强归因于CQDs光捕获能力的增强及其加速CQDs/WO3电极和电解质之间界面上的电荷转移。活性的提高表明 CQDs/WO3 作为光电化学太阳能转换的有效电极的潜力。
This work reports on single-crystal WO3nanoflakes decorated with carbon quantum dots (CQDs) for efficient photoelectrochemical energy conversion system. The promising photoanodes can be fabricatedviaseed-mediated solvothermal method in combination with subsequent impregnation-assembling. A photocurrent density of 1.46 mA cm−2at 1.0 Vvs. Ag/AgCl can be achieved for the CQDs/WO3electrode when performing linear sweep voltammetry measurements in 1 M H2SO4solution under AM 1.5G illumination, which is about two times higher than that of the bare WO3electrode. The enhancement of photoelectrochemical performance is ascribed to the enhanced light harvesting ability of CQDs and its accelerating charge transfer across the interface between CQDs/WO3electrode and electrolyte. The improved activity indicates the potential of CQDs/WO3as an efficient electrode for photoelectrochemical solar energy conversion.