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Efficient, highly stable Zn2+ doped NiO nanoparticles with enhanced magnetic and supercapacitor applications
Materials Technology ( IF 3.1 ) Pub Date : 2021-07-13 , DOI: 10.1080/10667857.2021.1949527
S. Sivakumar 1 , Nazir Ahmad Mala 1 , Khalid Mujasam Batoo 2 , Emad H. Raslan 3
Affiliation  

ABSTRACT

In this study, pristine nickel oxide (NiO) and Zn2+ doped NiO nanoparticles (NPs) are synthesised through the chemical precipitation method. Samples were analysed by TG/DTA, XRD, UV-DRS spectroscopy, FT-IR spectroscopy, SEM, EDX, TEM, SAED, VSM and CV techniques. The XRD result indicates that the obtained samples are face-centred cubic structure and hexagonal structure. SEM and TEM images established the spherical and hexagonal shape for the pristine and Zn2+ doped NiO NPs, respectively. A variation in the optical absorption and low energy bandgap was observed in pristine and Zn2+ doped NiO NPs. The NiO phase formation was confirmed by the existence of a peak at 492 cm−1 in FT-IR. The magnetic characterisation identifies the conversion of weak ferromagnetic to superparamagnetic behaviour of pristine and Zn2+ doped NiO NPs. The highest specific capacitance (Cs) of 667 Fg-1 at a 10 mV s−1 scan rate was obtained for 0.04 M, Zn2+ doped NiO NPs.



中文翻译:

高效、高度稳定的 Zn2+ 掺杂 NiO 纳米颗粒,具有增强的磁性和超级电容器应用

摘要

 在本研究中,通过化学沉淀法合成了原始氧化镍(NiO)和掺杂Zn 2+的NiO纳米颗粒(NPs)。通过 TG/DTA、XRD、UV-DRS 光谱、FT-IR 光谱、SEM、EDX、TEM、SAED、VSM 和 CV 技术分析样品。XRD结果表明,所得样品为面心立方结构和六方结构。SEM 和 TEM 图像分别确定了原始和 Zn 2+ 掺杂的 NiO NPs 的球形和六边形形状。在原始和 Zn 2+ 掺杂的 NiO NPs中观察到光吸收和低能带隙的变化。NiO相的形成通过在492 cm -1处存在峰来证实 在 FT-IR 中。磁性表征确定了原始和 Zn 2+ 掺杂的 NiO NPs 的弱铁磁行为向超顺磁行为的转换。对于 0.04 M、Zn 2+ 掺杂的 NiO NPs ,在 10 mV s -1 扫描速率下获得了667 Fg-1 的最高比电容 (Cs) 。

更新日期:2021-07-13
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