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A general approach for the growth of metal oxide nanorod arrays on graphene sheets and their applications

机译:在石墨烯片上生长金属氧化物纳米棒阵列的一般方法及其应用

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摘要

In the fabrication of flexible devices, highly ordered nanoscale texturing, such as semiconductor metal oxide nanorod arrays on flexible substrates, is critical for optimal performance. Use of transparent conducting films, metallic films, and polymer substrates is limited by mechanical brittleness, chemical and thermal instability, or low electrical conductivity, low melting point, and so on. A simple and general nanocrystal-seed-directed hydrothermal route has now been developed for large-scale growth of nanorod arrays of various semiconductor metal oxides (MO), including TiO_2, ZnO, MnO_2, CuO, and ZrO_2 on both sides of flexible graphene (G) sheets to form sandwichlike MO/G/MO heterostructures. The TiO_2/G/TiO_2 heterostructures have much higher photocatalytic activity than TiO_2 nanorods, with a photocatalytic degradation rate of methylene blue that is four times faster than that of the TiO_2 nanorods, and are thus promising candidates for photocatalytic decontamination.
机译:在柔性设备的制造中,高度有序的纳米级纹理化(例如柔性基板上的半导体金属氧化物纳米棒阵列)对于实现最佳性能至关重要。透明导电膜,金属膜和聚合物基材的使用受到机械脆性,化学和热不稳定性或低电导率,低熔点等的限制。现在已经开发了一种简单且通用的纳米晶种定向水热路线,用于大规模生长各种半导体金属氧化物(MO)的纳米棒阵列,包括柔性石墨烯两侧的TiO_2,ZnO,MnO_2,CuO和ZrO_2( G)片材形成夹心状的MO / G / MO异质结构。 TiO_2 / G / TiO_2异质结构比TiO_2纳米棒具有更高的光催化活性,亚甲基蓝的光催化降解速率比TiO_2纳米棒快四倍,因此有望成为光催化净化的候选材料。

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