| 江美琳,金辉,邓聪,王思.生物炭负载Fe3O4纳米粒子的制备与表征[J].农业环境科学学报,2018,37(3):592-597. |
| 生物炭负载Fe3O4纳米粒子的制备与表征 |
| Preparation and characterization of nanoparticles containing Fe3O4 cores in biochar |
| 投稿时间：2017-09-17 |
| DOI：10.11654/jaes.2017-1266 |
| 中文关键词: 生物炭 纳米四氧化三铁 磁性 |
| 英文关键词: biochar nanoparticles Fe3O4 magnetic |
| 基金项目: |
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| 摘要点击次数: 2405 |
| 全文下载次数: 3326 |
| 中文摘要: |
| 为了推进可再生资源的综合利用，本文以水稻秸秆为原料，利用高温热解有机前驱体法成功制备磁性Fe3O4纳米粒子/生物炭复合材料。用X射线衍射仪（XRD）、傅立叶变换红外光谱仪（FT-IR）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、热重分析仪（TG）、综合物性测量系统（PPMS）、元素分析仪（EA）、电感耦合等离子体原子发射光谱仪（ICP-OES）及全自动快速比表面与孔隙度分析仪（BET）对其进行了表征。结果表明：复合材料上生成了形貌均一、结晶度较高、粒径范围为3~10 nm的Fe3O4纳米粒子；复合材料的饱和磁化强度达到26.64 emu·g-1；复合材料相比于原始生物炭具有更好的热稳定性和更大的比表面积；复合材料的微孔数量少于原始生物炭，孔隙结构以中大孔为主；铁元素在复合材料上的含量为12.08 mg·g-1。通过对两种材料物理化学性质的比较与归纳，以期为复合材料的合成及应用提供参考。 |
| 英文摘要: |
| 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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