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Biological synthesis of manganese dioxide nanoparticles by Kalopanax pictus plant extract

机译：斜纹植物提取物生物合成二氧化锰纳米颗粒

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摘要

Manganese dioxide (MnO) nanoparticles were synthesised by the reduction of potassium permanganate (KMnO) using leaf extract at room temperature. A transparent dark-brown colour appeared after the addition of leaf extract to the solution of permanganate. The time course of the reduction of KMnO and synthesis of MnO nanoparticles was monitored by means of UV–Vis spectra. The reduction of KMnO occurred after addition of plant extract with disappearance of KMnO specific peaks and emergence of peak specific for MnO nanoparticles. MnO nanoparticles showed absorption maxima at 404 nm. The electron dispersive X-ray spectroscopy analyses confirmed the presence of Mn and O in the sample. X-ray photoelectron spectroscopy revealed characteristic binding energies for MnO nanoparticles. Transmission electron microscopy micrographs revealed presence of uniformly dispersed spherical shaped particles with average size of 19.2 nm. The selected area electron diffraction patterns revealed the crystalline nature of MnO nanoparticles. Fourier transform-infrared spectroscopy spectra of pure MnO show the occurrence of O–Mn–O vibrational mode at around 518 cm. The phyto-synthesised MnO nanoparticles showed degradation ability of dyes (congo red and safranin O) similar to chemically synthesised MnO nanoparticles. This study shows simple and eco-friendly synthesis of MnO nanoparticles by plant extract and their utilisation for dye degradation for the first time.
机译：通过在室温下使用叶提取物还原高锰酸钾（KMnO）来合成二氧化锰（MnO）纳米颗粒。将叶提取物添加到高锰酸盐溶液中后，出现透明的黑褐色。通过UV-Vis光谱监测KMnO还原和MnO纳米颗粒合成的时间过程。加入植物提取物后，KMnO减少，而KMnO特有峰消失，而MnO纳米颗粒特有峰出现。 MnO纳米颗粒在404 nm处显示最大吸收。电子弥散X射线光谱分析证实样品中存在锰和氧。 X射线光电子能谱揭示了MnO纳米粒子的特征结合能。透射电子显微镜显微照片显示存在平均尺寸为19.2nm的均匀分散的球形颗粒。所选区域的电子衍射图显示了MnO纳米粒子的晶体性质。纯MnO的傅立叶变换红外光谱表明，在518 cm附近发生了O–Mn–O振动模式。植物合成的MnO纳米颗粒显示出与化学合成的MnO纳米颗粒相似的染料（刚果红和番红O）的降解能力。这项研究首次显示了通过植物提取物简单，环保地合成MnO纳米颗粒及其在染料降解中的应用。

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