Zhu Xiurong, Hope-Weeks Lousia J, Yu Yi, Yuan Jvjun, Zhang Xianke, Yu Huajun, Liu Jiajun, Li Xiaofen, Zeng Xianghua
School of Physics and Electronic Information, Gannan Normal University Ganzhou Jiangxi 341000 China
Department of Chemistry and Biochemistry, Texas Tech University Lubbock Texas 79409 USA
RSC Adv. 2022 Jul 13;12(31):20191-20198. doi: 10.1039/d2ra03270h. eCollection 2022 Jul 6.
By using glycidol as a catalyst, high porosity, low-density resorcinol (R) and formaldehyde (F) aerogels and carbon aerogels (CAs) were synthesized a sol-gel method. The effect of glycidol and water on the color, density, morphology, textual characteristics and adsorption properties of the resultant RF aerogels and CAs were investigated in detail. The results revealed that the properties of RF aerogels and CAs can be controlled by adjusting the amount of glycidol and water. The resultant RF aerogels and CAs were porous materials, the minimum densities of RF aerogels and CAs were 96 and 110 mg cm respectively while the maximum specific surface areas of RF aerogels and CAs were 290 and 597 m g. The maximum adsorption capacity of CAs was about 125 mg g on Rhodamine B, which was higher than that of some reported CAs catalyzed by base and acid catalysts. The sol-gel mechanisms of RF aerogels and CAs can be attributed to the opening of the epoxy group of glycidol in the mixture of R and F.
以缩水甘油为催化剂，采用溶胶 - 凝胶法合成了高孔隙率、低密度的间苯二酚（R）和甲醛（F）气凝胶以及碳气凝胶（CA）。详细研究了缩水甘油和水对所得RF气凝胶和CA的颜色、密度、形态、结构特征及吸附性能的影响。结果表明，通过调节缩水甘油和水的用量可以控制RF气凝胶和CA的性能。所得RF气凝胶和CA均为多孔材料，RF气凝胶和CA的最小密度分别为96和110 mg/cm³，而RF气凝胶和CA的最大比表面积分别为290和597 m²/g。CA对罗丹明B的最大吸附容量约为125 mg/g，高于一些报道的由碱和酸催化剂催化制备的CA。RF气凝胶和CA的溶胶 - 凝胶机理可归因于缩水甘油环氧基在R和F混合物中的开环。
