氧化钙
傅里叶变换红外光谱
蛋壳
碳酸钙
材料科学
化学工程
纳米颗粒
扫描电子显微镜
溶胶凝胶
钙
粒径
氧化物
核化学
纳米技术
化学
冶金
复合材料
工程类
生物
生态学
作者
Lulit Habte,Natnael Shiferaw,Dure Mulatu,Thenepalli Thriveni,Chilakala Ramakrishna,Ji Whan Ahn
出处
期刊:Sustainability
[MDPI AG]
日期:2019-06-07
卷期号:11 (11): 3196-3196
被引量:145
摘要
The sol-gel technique has many advantages over the other mechanism for synthesizing metal oxide nanoparticles such as being simple, cheap and having low temperature and pressure. Utilization of waste materials as a precursor for synthesis makes the whole process cheaper, green and sustainable. Calcium Oxide nanoparticles have been synthesized from eggshell through the sol-gel method. Raw eggshell was dissolved by HCl to form CaCl2 solution, adding NaOH to the solution dropwise to agitate Ca (OH)2 gel and finally drying the gel at 900 °C for 1 h. The synthesized nanoparticle was characterized by scanning electron microscope (SEM), Fourier-transform infrared spectroscopy (FTIR), X-Ray fluorescence (XRF) and X-ray diffraction (XRD). The FTIR and XRD results have clearly depicted the synthesis of calcium oxide from eggshell, which is mainly composed of calcium carbonate. The FE-SEM images of calcium oxide nanoparticles showed that the particles were almost spherical in morphology. The particle size of the nanoparticles was in the range 50 nm–198 nm. Therefore, waste eggshell can be considered as a promising resource of calcium for application of versatile fields.
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