The purpose of this article was to explore the influences of synthetic methods on the lignin-based carbon materials. In this paper, the lignin-based activated carbon materials were comparatively researched in ZnCl2 solution using various methods, including the microwave-assisted method, ultrasound method, and UV irradiation method, respectively. Scanning electron microscopy (SEM), Fourier transform infrared spectrometry (FT-IR), thermogravimetric analysis (TGA), and differential thermal analysis (DTA) were used to characterize the as-prepared samples. The effects of the synthetic parameters including the types of lignin, activated solution concentration, types of activated solution, and synthetic methods on the morphologies, thermal stability, and specific surface area of samples were comparatively investigated in detail. The specific surface area of lignin-based activated carbon increased to 473.8, 765.3, and 211.2 m2∙g−1 using the microwave-assisted method, ultrasound method, and UV irradiation method, respectively, compared with that of the control (113.4 m2∙g−1). The lignin-based carbon materials displayed the enhanced absorptive capacity, compared with that of the control. These novel synthetic methods reported here maybe have a guiding significance for the synthesis of carbon materials using the lignin as precursors.
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机译:本文的目的是探讨合成方法对木质素基碳材料的影响。本文分别采用微波辅助法,超声法和紫外线照射法等多种方法对ZnCl2溶液中木质素基活性炭材料进行了比较研究。使用扫描电子显微镜(SEM),傅立叶变换红外光谱(FT-IR),热重分析(TGA)和差热分析(DTA)表征了所制备的样品。比较研究了木质素类型,活化溶液浓度,活化溶液类型和合成方法等合成参数对样品的形貌,热稳定性和比表面积的影响。木质素基活性炭的比表面积通过微波辅助法,超声法和紫外线法分别增加到473.8、765.3和211.2 m 2 sup>∙g -1 sup>与对照相比(113.4 m 2 sup>∙g -1 sup>)。与对照相比,木质素基碳材料显示出增强的吸收能力。本文报道的这些新颖的合成方法可能对使用木质素作为前体的碳材料合成具有指导意义。
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