Facile Synthesis of Graphene-Like Copper Oxide Nanofilms with Enhanced Electrochemical and Photocatalytic Properties in Energy and Environmental Applications
Facile Synthesis of Graphene-Like Copper Oxide Nanofilms with Enhanced Electrochemical and Photocatalytic Properties in Energy and Environmental Applications
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DOI：
10.1021/acsami.5b01451
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发表时间：
2015-05-13
影响因子：
9.5
通讯作者：
Luo, Yongsong
中科院分区：
文献类型：
--
作者：
Lu, Yang;Liu, Xianming;Luo, Yongsong
通过原位阳极氧化在泡沫铜基底上生长新型石墨烯状CuO纳米膜，用于超级电容器电极和用于降解染料污染物的光催化剂的多功能应用。所制备的CuO由互连的，高度结晶的，导电的CuO纳米片与分级开放的介孔和大的表面积。负载在泡沫铜上的CuO纳米膜用作超级电容器的独立式无粘合剂电极，其表现出优异的电化学性能，具有大的比电容（在1 A g（-1）下为919 F g（-1））、优异的循环稳定性（在5000次循环后7%的电容损失）和良好的倍率性能（在30 A g（-1）下为748 F g（-1））。多孔CuO纳米薄膜对亚甲基蓝的降解也表现出了优异的光催化活性，60 min后的降解率为99%，远高于商业CuO粉末的54%。这种优异的储能和光催化性能的类石墨烯CuO纳米薄膜可以在能源和环境领域的大规模应用开辟了新的途径。
Novel graphene-like CuO nanofilms are grown on a copper foam substrate by in situ anodization for multifunctional applications as supercapacitor electrodes and photocatalysts for the degradation of dye pollutants. The as-prepared CuO consists of interconnected, highly crystalline, conductive CuO nanosheets with hierarchical open mesopores and a large surface area. The CuO nanofilms supported on a copper foam are employed as freestanding, binder-free electrodes for supercapacitors, which exhibit wonderful electrochemical performance with a large specific capacitance (919 F g(-1) at 1 A g(-1)), an excellent cycling stability (7% capacitance loss after 5000 cycles), and a good rate capability (748 F g(-1) at 30 A g(-1)). The porous CuO nanofilms also demonstrate excellent photocatalytic activities for degradation of methylene blue, with a degradation rate 99% much higher than 54% of the commercial CuO powders after 60 min. This excellent energy storage and photocatalytic performance of the graphene-like CuO nanofilms can open a new avenue for large-scale applications in energy and environmental fields.