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首页> 外文期刊>RSC Advances >Selective synthesis of Fe3O4, gamma-Fe2O3, and alpha-Fe2O3 using cellulose-based composites as precursors
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Selective synthesis of Fe3O4, gamma-Fe2O3, and alpha-Fe2O3 using cellulose-based composites as precursors

机译：使用基于纤维素的复合材料选择性合成Fe3O4，Gamma-Fe2O3和α-Fe2O3作为前体

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摘要

Iron oxide with various phases such as Fe3O4, gamma-Fe2O3, and alpha-Fe2O3 has been selective successfully synthesized using cellulose-based composites as precursors, which were obtained at 180 degrees C for 45 min by the microwave-hydrothermal method. The products were characterized with X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TG), derivative thermogravimetric analysis (DTG), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). Fe3O4, gamma-Fe2O3, and alpha-Fe2O3 could be selectively synthesized by changing the calcination temperature and atmosphere. It was found that Fe3O4 was obtained in the N-2 atmosphere. However, gamma-Fe2O3 and alpha-Fe2O3 were observed at 300 and 500 degrees C for 3 h in the air atmosphere, respectively. The as-synthesized Fe3O4 and gamma-Fe2O3 displayed superparamagnetic characteristics at room temperature via the magnetization measurement. The methylene blue (MB) adsorption capacity of gamma-Fe2O3 (air 300 degrees C) can reach 98.72% and the adsorption isotherms better fitted Freundlich isotherm models. This work provided a promising strategy for the synthesis of metal and carbon/metal composites using biomass as a precursor.
机译：使用纤维素的复合材料作为前体，用纤维素的复合材料作为前体成功地合成了各种相，例如Fe 3 O 4，γ-Fe 2 O 3和α-Fe 2 O 3的氧化铁已成功地合成。通过微波 - 水热法在180℃下以180℃下获得45分钟的前体合成。该产品的特征在于X射线粉末衍射（XRD），傅里叶变换红外光谱（FT-IR），热重分析（Tg），衍生热重试验（DTG），X射线光电子能谱（XPS），以及扫描电子显微镜（SEM）。通过改变煅烧温度和大气，可以选择性地合成Fe3O4，Gamma-Fe2O3和α-Fe2O3。发现在N-2气氛中获得Fe 3 O 4。然而，在300和500℃下分别观察到γ-Fe 2 O 3和α-Fe 2 O 3在空气气氛中3小时。通过磁化测量，AS合成的Fe3O4和γ-Fe2O3在室温下显示超顺磁性特性。 γ-Fe2O3（空气300摄氏度）的亚甲基蓝（MB）吸附能力可达到98.72％，吸附等温物更好的Freundlich等温机型。该工作提供了使用生物质作为前体的合成金属和碳/金属复合材料的有希望的策略。

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  • 来源
    《RSC Advances》 |2016年第3期|共6页
  • 作者

    Liu Shan; Yao Ke; Fu Lian-Hua; Ma Ming-Guo;

  • 作者单位

    Beijing Forestry Univ Coll Mat Sci &

    Technol Beijing Key Lab Lignocellulos Chem Beijing 100083 Peoples R China;

    Beijing Forestry Univ Coll Mat Sci &

    Technol Beijing Key Lab Lignocellulos Chem Beijing 100083 Peoples R China;

    Beijing Forestry Univ Coll Mat Sci &

    Technol Beijing Key Lab Lignocellulos Chem Beijing 100083 Peoples R China;

    Beijing Forestry Univ Coll Mat Sci &

    Technol Beijing Key Lab Lignocellulos Chem Beijing 100083 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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