Jeong Jin-Ju, Kim Jae-Hun, Lee Jung-Soo
Department of Bio-Chemical Engineering, Chosun University, Chosundaegil 146, Dong-gu, Gwangju 61452, Republic of Korea.
Molecules. 2024 Oct 13;29(20):4844. doi: 10.3390/molecules29204844.
This article presents an efficient method for isolating cellulose nanocrystals (CNcs) from seaweed waste using a combination of electron beam (E-beam) irradiation and acid hydrolysis. This approach not only reduces the chemical consumption and processing time, but also improves the crystallinity and yield of the CNcs. The isolated CNcs were then thermally annealed at 800 and 1000 °C to produce porous nanocarbon materials, which were characterized using scanning electron microscopy, X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy to assess their structural and chemical properties. Electrochemical testing of electrical double-layer capacitors demonstrated that nanocarbon materials derived from seaweed waste-derived CNcs annealed at 1000 exhibited superior capacitance and stability. This performance is attributed to the formation of a highly ordered graphitic structure with a mesoporous architecture, which facilitates efficient ion transport and enhanced electrolyte accessibility. These findings underscore the potential of seaweed waste-derived nanocarbon as a sustainable and high-performance material for energy storage applications, offering a promising alternative to conventional carbon sources.
本文介绍了一种利用电子束（E-beam）辐照和酸水解相结合的方法从海藻废料中分离纤维素纳米晶体（CNcs）的有效方法。这种方法不仅减少了化学消耗和处理时间，还提高了CNcs的结晶度和产率。然后将分离出的CNcs在800和1000°C下进行热退火，以制备多孔纳米碳材料，使用扫描电子显微镜、X射线衍射、拉曼光谱和X射线光电子能谱对其进行表征，以评估其结构和化学性质。对双电层电容器的电化学测试表明，在1000°C退火的源自海藻废料衍生的CNcs的纳米碳材料表现出优异的电容和稳定性。这种性能归因于形成了具有介孔结构的高度有序的石墨结构，这有利于高效的离子传输和增强的电解质可及性。这些发现强调了源自海藻废料的纳米碳作为一种可持续的高性能储能应用材料的潜力，为传统碳源提供了一个有前景的替代方案。
