通过简单的氢氧化钾-蒸汽再活化优化生物基活性炭纤维的孔隙结构

Optimizing the Pore Structure of Bio-Based ACFs through a Simple KOH-Steam Reactivation.

作者信息

Huang Yuxiang, Ma Erni, Zhao Guangjie

机构信息

College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.

出版信息

Materials (Basel). 2016 May 31;9(6):432. doi: 10.3390/ma9060432.

DOI:10.3390/ma9060432

PMID:28773554

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5456753/

Abstract

Highly microporous bio-based activated carbon fibers (ACFs) were prepared through a simple reactivation method. Sawdust, as the starting material, was liquefied and melt-spun to produce the precursor fibers. Then, the precursor fibers were activated by KOH and reactivated by steam. By varying the conditions of the two activation processes, the formation mechanism of the pore structure was studied, and the result showed that steam reactivation has a positive effect on the development of microporosity. The sample with the optimal condition exhibited the highest specific surface area of 2578 m²·g as well as the largest pore volume of 1.425 cm³·g, where micropores contributed 70.3%. Due to its excellent texture properties, the ACF exhibited a high adsorption capacity of 1934 mg/g for iodine.

摘要

通过一种简单的再活化方法制备了高度微孔的生物基活性炭纤维（ACF）。以锯末为原料，将其液化并熔融纺丝以制备前驱体纤维。然后，前驱体纤维用KOH活化并用蒸汽再活化。通过改变两种活化过程的条件，研究了孔结构的形成机理，结果表明蒸汽再活化对微孔的发展有积极作用。在最佳条件下制备的样品表现出最高的比表面积，为2578 m²·g，以及最大的孔体积，为1.425 cm³·g，其中微孔占70.3%。由于其优异的织构性能，该ACF对碘表现出1934 mg/g的高吸附容量。