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首页> 外文期刊>Journal of nano research >Synthesis and Characterization of Nano-Silica from Teff Straw
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Synthesis and Characterization of Nano-Silica from Teff Straw

机译：Teff秸秆合成纳米二氧化硅及其表征

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摘要

Efficient utilization of agricultural residue is the need of today's environment. Teff straw is one such agricultural residue which is available in high amount in east African continent particularly Ethiopia. In the present study, combination of heat and acid treatment has been used to extract nano-silica from teff straw. X-ray fluorescence (XRF) analysis showed presence of high amount of silicon dioxide (approximate to 52%) in raw teff straw. Thermal treatment at 600 degrees C for 4 hour increased the SiO2 concentration to approximate to 92% in its ash. Further acid treatment increased the concentration to approximate to 97%. Fourier transform infrared (FTIR) spectroscopy also confirmed increase in SiO2 after thermal and acid treatment. X-ray diffraction (XRD) analysis showed the silica of amorphous nature in teff straw ash before acid treatment (S-BAT) whereas crystallinity increased after acid treatment (S-AAT). Transmission electron microscopy (TEM) showed presence of uniform nano-disks shaped particles of 50 nm average particle size in acid treated teff straw ash. Compared to other agricultural residues high amount of silica availability as raw and its small diameter anatomy structure will make teff straw better source of silica material at lower heat and chemical treatment.
机译：有效利用农业残留物是当今环境的需要。 Teff秸秆是一种这样的农业残留物，在东非大陆特别是埃塞俄比亚大量供应。在本研究中，热处理和酸处理相结合已被用于从teff秸秆中提取纳米二氧化硅。 X射线荧光（XRF）分析表明未加工的teff秸秆中存在大量的二氧化硅（约52％）。在600摄氏度下热处理4小时，将SiO2的浓度提高至约灰分的92％。进一步的酸处理使浓度增加到大约97％。傅立叶变换红外（FTIR）光谱也证实了热处理和酸处理后SiO2的增加。 X射线衍射（XRD）分析表明，在酸处理（S-BAT）之前，teff秸秆灰中的非晶态二氧化硅，而在酸处理（S-AAT）之后，结晶度增加。透射电子显微镜（TEM）显示在酸处理过的teff稻草灰中存在平均粒径为50 nm的均匀纳米盘状颗粒。与其他农业残留物相比，大量的二氧化硅可作为原料使用，并且其小直径的解剖结构将使teff秸秆在较低的热量和化学处理下成为更好的二氧化硅材料来源。

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