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首页> 外文期刊>Applied Surface Science >Controlled synthesis of p-type NiO-type GO nanocomposite with enhanced photocatalytic activity and study of temperature effect on the photocatalytic activity of the nanocomposite
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Controlled synthesis of p-type NiO-type GO nanocomposite with enhanced photocatalytic activity and study of temperature effect on the photocatalytic activity of the nanocomposite

机译：具有增强的光催化活性的p型NiO / n型GO纳米复合材料的可控合成及温度对纳米复合材料光催化活性的影响

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In this work, we outline the synthesis of binary semiconductor heterojunction comprising of two dimensional Graphene oxide loaded with NiO nanoparticles in varying amounts, by an in-situ method under controlled atmosphere. X-ray diffraction (XRD), resonant Raman spectroscopy, FTIR spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-Vis diffuse reflectance (DR) spectroscopy and photoluminescence (PL) spectroscopy were used to characterize the as-synthesized nanocomposites. The results indicated that the p-n heterojunction is formed between the cubic structured NiO and GO in the NiO/GO nanocomposites. Moreover, the photocatalytic activity of the as-prepared NiO/GO nanocomposites for the degradation of Methylene blue (MB) was much higher than that of as-prepared cubic NiO nanopowder, which could be due to the formation of p-n heterojunction in the NiO/GO nanocomposites. In particular, the p-type NiO-type GO nanocomposites with 65% GO showed the best catalytic activity. Almost 97% of the initial MB dyes were decomposed by the photocatalyst in 50 min. The enhancement of photocatalytic activity can be attributed to the high separation efficiency of photogenerated electrons and holes resulting from the interaction between NiO and GO. Further, we are discussing the effect of different reaction parameters on the photocatalytic activity of the nanocomposite.
机译：在这项工作中，我们概述了在受控气氛下通过原位方法合成的二维半导体异质结，该异质结包含二维量的氧化石墨烯和不同数量的NiO纳米颗粒。使用X射线衍射（XRD），共振拉曼光谱，FTIR光谱，扫描电子显微镜（SEM），透射电子显微镜（TEM），紫外-可见漫反射（DR）光谱和光致发光（PL）光谱来表征-合成的纳米复合材料。结果表明，在NiO / GO纳米复合材料中，立方结构的NiO和GO之间形成了p-n异质结。此外，制备的NiO / GO纳米复合材料对亚甲基蓝（MB）的降解具有较高的光催化活性，这可能是由于NiO /中形成了pn异质结。 GO纳米复合材料。特别地，具有65％GO的p型NiO / n型GO纳米复合材料表现出最佳的催化活性。 50分钟内，几乎97％的初始MB染料被光催化剂分解。 NiO和GO的相互作用导致光生电子和空穴的分离效率高，这归因于光催化活性的提高。此外，我们正在讨论不同反应参数对纳米复合材料光催化活性的影响。

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