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首页> 外文期刊>Nano Energy >Vertically-aligned Pt-decorated MoS2 nanosheets coated on TiO2 nanotube arrays enable high-efficiency solar-light energy utilization for photocatalysis and self-cleaning SERS devices
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Vertically-aligned Pt-decorated MoS2 nanosheets coated on TiO2 nanotube arrays enable high-efficiency solar-light energy utilization for photocatalysis and self-cleaning SERS devices

机译:涂上TiO2纳米管阵列上的垂直对齐的PT装饰MOS2纳米齿纳型纳米片使得高效的太阳能利用用于光催化和自清洁SERS设备

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摘要

The ability to reproducibly create a surface enhanced Raman scattering (SERS) substrate renders an effective means of detecting and degrading organic contaminants. Vertically aligned (VA) nanomaterials have been extensively explored as highly efficient catalysts due to their excellent electron transportability and high concentration of exposed active edge sites. Herein, we report on a ternary ultrafast-electron-transfer heterostructure composed of Pt nanoparticles in-situ grown on VA-MoS2 nanosheet edge sites decorated on TiO2 nanotube arrays (NTAs) (denoted Pt/VA-MoS2/NTAs). Compared with pristine TiO2 NTAs, the Pt/VA-MoS2/NTAs possess a strong resonant SERS effect for detecting rhodamine 6G and an outstanding UV-assisted self-cleaning effect, displaying an excellent photocatalytic performance under visible light irradiation. Such markedly improved performance of the ternary Pt/VA-MoS2/TiO2 NTAs nanocomposites can be attributed to the synergy of catalytic activity of Pt-deposited MoS2 edge sites, the ultrafast electron transfers of VA-MoS2 NS/TiO2 NTAs, and the appropriate band alignment among these three constituents. As such, it represents a robust mean of developing advanced energy utilization nanocomposites for high-performance catalysts and sensors.
机译:可重复地产生表面增强拉曼散射(SERS)衬底的能力使得有效的检测和降解有机污染物的方法。由于其优异的电子运输性和高浓度的暴露的主动边缘位点,垂直对准(Va)纳米材料被广泛地探索为高效催化剂。这里,我们报告由在TiO2纳米阵列(NTAS)上装饰的VA-MOS2纳米末端位的原位上生长的Pt纳米粒子的三元超速电子转移异质结构(表示为Pt / Va-MOS2 / NTA)。与原始TiO2 NTA相比,PT / VA-MOS2 / NTA具有强大的共振SERS,用于检测菱胺6G和出色的UV辅助自清洁效果,在可见光照射下显示出优异的光催化性能。这种明显改善的三元Pt / Va-MOS2 / TiO2 NTA纳米复合材料的性能可归因于Pt沉积MOS2边缘位点的催化活性的协同作用,VA-MOS2 NS / TiO2 NTA的超快电子转移和适当的带这三个成分中的对齐。因此,它代表了开发用于高性能催化剂和传感器的高级能量利用纳米复合材料的强大平均值。

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