Abstract NiO nanostructure was synthesized using a simple co-precipitation method and was embedded on reduced graphene oxide surface via ultrasonication. Structural investigations were made through X-ray diffraction (XRD) and functional groups were confirmed by Fourier transform infrared spectroscopy (FTIR). XRD analysis revealed the grain size reduction with doping. Fourier transform infrared spectroscopy confirmed the presence of metal-oxygen bond in pristine and doped NiO nanostructure as well as the presence of carbon containing groups. Scanning electron microscopy (SEM) indicated that the particle size decreased when NiO nanostructure was doped with copper. BET surface area was found to increase almost up to 43 m2/g for Cu doped NiO nanostructure/rGO composite. Current-voltage measurements were performed using two probe method. UV–Visible spectroscopic profiles showed the blue and red shift for Cu doped NiO nanostructure and Cu doped NiO Nanostructure/rGO composite respectively. Rate constant for Cu doped NiO nanostructure/rGO composite found to increase 4.4 times than pristine NiO nanostructure.

中文翻译：

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CuxNi1-xO 纳米结构及其与还原氧化石墨烯的纳米复合材料：合成、表征和光催化应用

摘要 采用简单的共沉淀法合成了 NiO 纳米结构，并通过超声处理嵌入还原的氧化石墨烯表面。通过 X 射线衍射 (XRD) 进行结构研究，并通过傅里叶变换红外光谱 (FTIR) 确认官能团。XRD 分析揭示了掺杂导致的晶粒尺寸减小。傅里叶变换红外光谱证实了在原始和掺杂的 NiO 纳米结构中存在金属-氧键以及含碳基团的存在。扫描电子显微镜 (SEM) 表明，当 NiO 纳米结构掺杂铜时，粒径减小。发现对于 Cu 掺杂的 NiO 纳米结构/rGO 复合材料，BET 表面积增加了几乎高达 43 m2/g。使用两个探针方法进行电流-电压测量。紫外-可见光谱图分别显示了铜掺杂的 NiO 纳米结构和铜掺杂的 NiO 纳米结构/rGO 复合材料的蓝移和红移。发现 Cu 掺杂的 NiO 纳米结构/rGO 复合材料的速率常数比原始 NiO 纳米结构增加 4.4 倍。