College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China.
Chemosphere. 2021 Jan;263:128093. doi: 10.1016/j.chemosphere.2020.128093. Epub 2020 Aug 25.
In this study, bamboo residues derived functional hydrochar microspheres have been fabricated by different acids-assisted hydrothermal carbonization including hydrochloric aicd, sulfuric acid or nitric acid.The energy-dispersive X-ray fluorescence spectroscopy and Fourier Transform Infrared spectroscopy analyses showed that sulfur- and nitrogen-containing functional groups were grafted on the surface of hydrochar microspheres, respectively. Elemental analysis indicates that the addition of acids has a significant influence on the hydrothermal reaction pathway and promotes the hydrolysis process. When the hydrothermal carbonization temperature is 220 °C, hydrochloric acid and nitric acid can effectively overcome the agglomeration of hydrochar microspheres and form single micron carbon sphere. Irregularly shaped hydrochar particles groups were formed during sulfuric acid-assisted hydrothermal treatment. The results indicate the viability of acid assisted hydrothermal carbonization to produce the functional hydrochar microsphere using bamboo residues.
在这项研究中，采用不同酸辅助水热碳化法制备了竹废料衍生的功能化水炭微球，包括盐酸、硫酸或硝酸。能量色散 X 射线荧光光谱和傅里叶变换红外光谱分析表明，硫和氮官能团分别接枝在水炭微球表面。元素分析表明，酸的添加对水热反应途径有显著影响，并促进水解过程。当水热碳化温度为 220°C 时，盐酸和硝酸可以有效地克服水炭微球的团聚，形成单微米碳球。硫酸辅助水热处理形成了不规则形状的水炭颗粒群。结果表明，酸辅助水热碳化法在利用竹废料制备功能化水炭微球方面具有可行性。
