Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, College of Light Industry and Food, Nanjing Forestry University, Nanjing 210037, China.
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, College of Light Industry and Food, Nanjing Forestry University, Nanjing 210037, China; National-Provincial Joint Engineering Research Center of Electromechanical Product Packaging, Nanjing Forestry University, Nanjing 210037, China.
Int J Biol Macromol. 2022 Sep 30;217:66-76. doi: 10.1016/j.ijbiomac.2022.07.045. Epub 2022 Jul 11.
The black liquor of bamboo pulp contains a large amount of silicon, which makes it difficult to separate industrial lignin, thus hindering its high-value utilization. Herein, this paper dedicates to exploring the high-value use of silica-containing lignin. Tetraethyl silicate (TEOS) was added to the above silicon-containing lignin for crosslinking with the lignin to prevent disintegration during carbonization and provide an additional source of silica. The carbonization is carried out at 600 °C (LT-6), 900 °C (LT-9) and 1200 °C (LT-12), and the structural evolution of SiOC is innovatively analyzed. The results show that LT-9 is dominated by the SiOC structure and has a specific surface area of 269 m g. The specific capacitance of LT-9 and LT-12 as supercapacitors electrodes is 78.6 F g and 74.8 F g at a current density of 1 A g, and remains 95 % and 91.7 % after 10,000 cycles. Moreover, LT-9 has a high yield of 54 %. In this work, silicon-containing lignin is exploratively prepared as a silicon-carbide-derived material. Furthermore, the potential relationship between different SiOC molecular structures and electrochemical performance is evaluated, which is instructive for the high-value utilization of black liquor in bamboo pulp.
竹浆黑液中含有大量硅，这使得工业木质素难以分离，从而阻碍了其高值化利用。本文致力于探索含硅木质素的高值化利用。将四乙氧基硅烷（TEOS）加入到上述含硅木质素中，与木质素交联，防止碳化过程中木质素解体，并提供额外的硅源。在 600°C（LT-6）、900°C（LT-9）和 1200°C（LT-12）下进行碳化，创新性地分析了 SiOC 的结构演变。结果表明，LT-9 以 SiOC 结构为主，比表面积为 269 m²/g。作为超级电容器电极，LT-9 和 LT-12 的比电容在 1 A/g 的电流密度下分别为 78.6 F/g 和 74.8 F/g，经过 10,000 次循环后仍保持 95%和 91.7%。此外，LT-9 的产率高达 54%。在这项工作中，我们探索性地制备了含硅木质素作为碳化硅衍生材料。此外，还评估了不同 SiOC 分子结构与电化学性能之间的潜在关系，这对竹浆黑液的高值化利用具有指导意义。
