College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, PR China.
College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, PR China.
Bioresour Technol. 2019 Jun;282:142-147. doi: 10.1016/j.biortech.2019.02.126. Epub 2019 Mar 1.
A green and facile approach was proposed to simultaneously produce fermentative sugar (FS), graphene quantum dots (GQDs), and hierarchical porous carbon (HPC) from sugarcane bagasse through the hydrothermal-carbonization process. In this work, the maximum yields of FS were 35.77%, 30.54%, 1.23%, 28.52%, and 41.85% for xylose, mannose, glucose, galactose, and arabinose, respectively. The GQDs, with bright blue fluorescence, had an average diameter at 2.26 nm, and exhibited a well-defined spherical shape and graphene structure. The formation mechanism of GQDs was further investigated, and the GQDs mainly derived from the dissolved lignin and polysaccharides. Moreover, the HPC presented a much higher surface area and controllable oxygen content than non-hydrothermal pretreatment porous carbon, whose unique pore structure was mainly resulted from the dissolution of FS. The green and facile approach provides a novel pathway to produce high value-added materials from sugarcane bagasse, developing a foundation for the preparation of better biomass materials.
本研究提出了一种绿色简便的方法，通过水热碳化过程，从甘蔗渣中同时生产发酵糖（FS）、石墨烯量子点（GQDs）和分级多孔碳（HPC）。在这项工作中，木糖、甘露糖、葡萄糖、半乳糖和阿拉伯糖的 FS 最大产率分别为 35.77%、30.54%、1.23%、28.52%和 41.85%。具有明亮蓝光荧光的 GQDs 的平均直径为 2.26nm，呈现出良好的球形和石墨烯结构。进一步研究了 GQDs 的形成机制，GQDs 主要来源于溶解的木质素和多糖。此外，与未经水热预处理的多孔碳相比，HPC 具有更高的比表面积和可控的氧含量，其独特的孔结构主要是由于 FS 的溶解。这种绿色简便的方法为从甘蔗渣中生产高附加值材料提供了新途径，为制备更好的生物质材料奠定了基础。
