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| Preparation and characterization of nanoparticles containing Fe3O4 cores in biochar |
| Received:September 17, 2017 |
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| KeyWord:biochar;nanoparticles Fe3O4;magnetic |
| Author Name | Affiliation | E-mail | | JIANG Mei-lin | School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China | | | JIN Hui | School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China | eesjh@mail.sysu.edu.cn | | DENG Cong | School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China | | | WANG Si | School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China | |
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| Abstract: |
| This study successfully prepared magnetic Fe3O4 nanoparticles/biochar composite materials(MB) using rice straw as a raw material and the pyrolysizing organic precursor method at high temperature to promote the comprehensive utilization of renewable resources. MB was characterized using X-ray powder diffraction(XRD), Fourier transformed-infrared spectroscopy(FT-IR), scanning electron microscopy(SEM), transmission electron microscopy(TEM), thermogravimetric analysis(TG), physical property measurement system(PPMS), elemental analyses(EA), inductively coupled plasma-atomic emission spectrometry(ICP-OES), and the automatic surface area and pore size analyzer(BET). The results showed that Fe3O4 nanoparticles with uniform morphology, high crystallinity, and particle size ranging from 3~10 nm were formed on the composite material, and the saturation magnetization reached 26.64 emu·g-1. In addition, the MB had better thermal stability and greater surface specific area than the original biochar(BC). The number of micropores in the MB was less than that in BC, and the pore structure was mainly mesopore. The Fe content in the MB was 12.08 mg·g-1. This comparison and summary of the physicochemical properties of these two materials provides a reference for the synthesis and application of composite materials. |
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