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首页> 外文期刊>ACS applied materials & interfaces >High Piezo-photocatalytic Efficiency of CuS/ZnO Nanowires Using Both Solar and Mechanical Energy for Degrading Organic Dye
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High Piezo-photocatalytic Efficiency of CuS/ZnO Nanowires Using Both Solar and Mechanical Energy for Degrading Organic Dye

机译：太阳能和机械能共同降解有机染料的CuS / ZnO纳米线的高压电光催化效率

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摘要

High piezo-photo catalytic efficiency of degrading organic pollutants has been realized from CuS/ZnO nanowires using both solar and mechanical energy. CuS/ZnO heterostructured nanowire arrays are compactly/vertically aligned on stainless steel mesh by a simple two-step wet-chemical method. The mesh supported nanocomposites can facilitate an efficient light harvesting due to the large surface area and can also be easily removed from the treated solution. Under both solar and ultrasonic irradiation, CuS/ZnO nanowires can rapidly degrade methylene blue (MB) in aqueous solution, and the recyclability is investigated. In this process, the ultrasonic assistance can greatly enhance the photocatalytic activity. Such a performance can be attributed to the coupling of the built-in electric field of heterostructures and the piezoelectric field of ZnO nanowires. The built-in electric field of the heterostructure can effectively separate the photogenerated electrons/holes and facilitate the carrier transportation. The CuS component can improve the visible light utilization. The piezoelectric field created by ZnO nanowires can further separate the photogenerated electrons/holes through driving them to migrate along opposite directions. The present results demonstrate a new water-pollution solution in green technologies for the environmental remediation at the industrial level.
机译：使用太阳能和机械能从CuS / ZnO纳米线实现了降解有机污染物的高压电光电催化效率。通过简单的两步湿化学方法，将CuS / ZnO异质结构纳米线阵列紧凑/垂直排列在不锈钢网上。网状负载的纳米复合材料由于大的表面积而可以促进有效的光收集，并且也可以容易地从处理的溶液中去除。在阳光和超声波照射下，CuS / ZnO纳米线都可以快速降解水溶液中的亚甲基蓝（MB），并对其可回收性进行了研究。在此过程中，超声辅助可以大大增强光催化活性。这种性能可归因于异质结构的内置电场与ZnO纳米线的压电场的耦合。异质结构的内置电场可以有效地分离光生电子/空穴并促进载流子传输。 CuS组分可以提高可见光利用率。 ZnO纳米线产生的压电场可通过驱动光生电子/空穴沿相反方向迁移，从而进一步分离它们。目前的结果证明了一种绿色技术中的新型水污染解决方案，可用于工业水平的环境修复。

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