ChemSusChem. 2014 Mar;7(3):875-82. doi: 10.1002/cssc.201300912.
Particles of iron oxide (Fe3O4 ; 20–40 nm) were embedded within activated carbons during the activation of hydrothermally carbonized (HTC) biomasses in a flow of CO2. Four different HTC biomass samples (horse manure, grass cuttings, beer production waste, and biosludge) were used as precursors for the activated carbons. Nanoparticles of iron oxide formed from iron catalyst included in the HTC biomasses. After systematic optimization, the activated carbons had specific surface areas of about 800 m2g1. The pore size distributions of the activated carbons depended strongly on the degree of carbonization of the precursors. Activated carbons prepared from highly carbonized precursors had mainly micropores, whereas those prepared from less carbonized precursors contained mainly mesopores. Given the strong magnetism of the activated carbon–nano-Fe3O4 composites, they could be particularly useful for water purification.
氧化铁颗粒（Fe3O4；20-40nm）在 CO2 流中通过水热碳化（HTC）生物质的激活过程中嵌入到活性炭内。使用四种不同的 HTC 生物质样品（马粪、草屑、啤酒生产废物和生物污泥）作为活性炭的前体。由 HTC 生物质中包含的铁催化剂形成的氧化铁纳米颗粒。经过系统优化，活性炭的比表面积约为 800m2g1。活性炭的孔径分布强烈依赖于前体的碳化程度。由高度碳化的前体制备的活性炭主要具有微孔，而由碳化程度较低的前体制备的活性炭主要具有中孔。鉴于活性炭-纳米-Fe3O4 复合材料的强磁性，它们可能特别有益于水净化。
