Rice Husks (RHs) are one of the most abundant sources of biomass in the world due to rice consumption. Lignocellulose and silica are two of the main components of RHs, which allow RHs to be applied in different areas. Lignocellulose can be partially dissolved in 1-butyl-3-methylimidazolium chloride (BMIMCl), which is a simple way of competing with the traditional extraction methods that suffer from high chemical consumption. A lignocellulose freeze gel is obtained via a cyclic liquid nitrogen freeze-thaw (NFT) process. Multi-functional self-assembled lignocellulose aerogel is obtained after CO2 supercritical drying. Based on the aerogel’s special properties, two routes are developed for practical applications. On one hand, the aerogel is coated to exhibit a superhydrophobic property that can be applied as an absorbent for oil spills. On the other hand, a carbon aerogel is synthesized via a pyrolysis process, resulting in a porous amorphous carbon. The residue after partially dissolving lignocellulose in BMIMCl is further calcined to obtain amorphous silica nanoparticles, achieving a comprehensive application of RHs.

中文翻译：

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稻壳中的木质纤维素气凝胶和无定形二氧化硅纳米粒子

由于稻米的消费，稻壳是世界上生物量最丰富的来源之一。木质纤维素和二氧化硅是相对湿度的两个主要成分，可以将相对湿度应用于不同的区域。木质纤维素可以部分溶解在1-丁基-3-甲基咪唑鎓氯化物（BMIMCl）中，这是与化学药品消耗高的传统提取方法竞争的简单方法。木质纤维素冷冻凝胶是通过循环液氮冷冻-解冻（NFT）方法获得的。二氧化碳超临界干燥后，得到多功能的自组装木质纤维素气凝胶。基于气凝胶的特殊性能，为实际应用开发了两种路线。一方面，气凝胶被涂覆以表现出超疏水性质，该超疏水性质可以用作漏油的吸收剂。另一方面，通过热解过程合成了碳气凝胶，产生了多孔的无定形碳。将木质纤维素部分溶解在BMIMCl中后，将残留物进一步煅烧以获得无定形二氧化硅纳米粒子，从而实现RH的全面应用。