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Enhanced photocatalytic activity and magnetic properties of CNTs/Sn-doped Co_3O_4 nanocomposite

机译：增强CNT / Sn掺杂CO_3O_4纳米复合材料的光催化活性和磁性性能

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摘要

Photocatalysis is a green technology which transforms available photon energy into useful chemical energy. The reaction mechanism is based on the ability to create electron-hole pairs under appropriate light. Semiconductors have attracted great attention in pho-tocatalysts because of their high photosensitivity. Spinel-type cobalt oxide nanorods have been prepared by a simple hydrothermal method using cobalt nitrate as precursor. Sn-doped Co_3O_4 was composited with carbon nanotubes for better photocatalytic activity. An extensive characterization of the prepared samples was carried out using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), Vibrating sample magnetometer (VSM) and UV-Visible absorption spectroscopy. The XRD results show the formation of Co_3O_4 phase with FCC structure, FESEM confirms the nanorods morphology of the cobalt oxide and the VSM taken at room temperature shows an antiferromagnetic behavior. The investigation of photocatalytic activity of Co_3O_4 based was done by methyl orange dye. At the end, the responsible mechanism of CNT/Sn-CO was discussed.
机译：光催化是一种绿色技术，将可用的光子能量转化为有用的化学能量。反应机理基于在适当光下产生电子孔对的能力。由于它们的光敏性高，半导体引起了Pho-tocatalysts的极大关注。通过使用硝酸钴作为前体的简单水热法制备尖晶石型钴氧化物纳米棒。 SN-DOPED CO_3O_4与碳纳米管合成，用于更好的光催化活性。使用X射线衍射（XRD），场发射扫描电子显微镜（FESEM），能量分散X射线光谱（EDS），傅里叶变换红外光谱（FTIR）进行广泛的表征，进行了制备的样品，傅里叶变换红外光谱（FTIR），振动样品磁力计（ VSM）和UV可见吸收光谱。 XRD结果显示使用FCC结构的CO_3O_4相的形成，FESEM确认氧化钴的纳米棒形态，并且在室温下拍摄的VSM显示反铁磁行为。基于CO_3O_4的光催化活性的研究是通过甲基橙染料完成的。最后，讨论了CNT / SN-CO的负责机制。

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