Bordun Ihor, Calus Dariusz, Szymczykiewicz Ewelina, Malovanyy Myroslav, Nahurskyi Nazar, Borysiuk Anatoliy, Kulyk Yuriy
Faculty of Electrical Engineering, Czestochowa University of Technology, J. Dabrowskiego Str. 69, 42-201 Czestochowa, Poland.
Viacheslav Chornovil Institute of Sustainable Development, Lviv Polytechnic National University, Bandera Str. 12, 79013 Lviv, Ukraine.
Nanomaterials (Basel). 2024 Nov 23;14(23):1886. doi: 10.3390/nano14231886.
A two-step method for the synthesis of C/Ni/N nanocomposites based on hydrolysis lignin from wood chemical processing waste is proposed. These nanocomposites were found to have a well-developed porous structure with a wide pore size distribution. It was shown that doping hydrolysis lignin with urea-derived nitrogen leads to the appearance of ferromagnetic behavior in the carbon material. When nickel chloride was added during pyrolysis, the magnetic behavior of the C/Ni/N composite was provided by superparamagnetic Ni particles less than 30 nm in size and the magnetism of the carbon matrix. The addition of urea during the synthesis of the nanocomposite further promotes better integration of nickel into the carbon structure. According to the results of magnetic studies, the nickel content in the C/Ni/N nanocomposite was 19 wt.% compared to 15 wt.% in the C/Ni nanocomposite. The synthesized nanocomposite was demonstrated to have no residual magnetization, so its particles do not agglomerate after the external magnetic field is removed. Due to this property and the well-developed porous structure, C/Ni/N composites have the potential to be used as catalysts, active electrode materials for autonomous energy sources, and in environmental technologies as magnetically sensitive adsorbents.
提出了一种基于木材化学加工废料水解木质素合成C/Ni/N纳米复合材料的两步法。发现这些纳米复合材料具有发达的多孔结构，孔径分布广泛。结果表明，用尿素衍生的氮掺杂水解木质素会导致碳材料出现铁磁行为。在热解过程中添加氯化镍时，C/Ni/N复合材料的磁行为由尺寸小于30 nm的超顺磁性镍颗粒和碳基体的磁性提供。在纳米复合材料合成过程中添加尿素进一步促进了镍更好地融入碳结构。根据磁性研究结果，C/Ni/N纳米复合材料中的镍含量为19 wt.%，而C/Ni纳米复合材料中的镍含量为15 wt.%。合成的纳米复合材料被证明没有剩余磁化强度，因此在去除外部磁场后其颗粒不会团聚。由于这种特性和发达的多孔结构，C/Ni/N复合材料有潜力用作催化剂、自主能源的活性电极材料以及环境技术中的磁敏吸附剂。
