Wang Z-M, Wang Z-X, Yamashita N, Hoshinoo K, Kanoh H
Aquamaterial Separation Technology RG, Marine Resource and Environment Institute, National Institute of Advanced Industrial Science and Technology, 2217-14 Hayashi-cho, Takamatsu-shi, Kagawa 761-0395, Japan.
J Colloid Interface Sci. 2004 Aug 1;276(1):151-8. doi: 10.1016/j.jcis.2004.03.016.
Magnesium oxide/hydroxide was deposited on pitch-based activated carbon fibers which were previously oxidized in air at different temperatures, and the changes in carbon oxidation activity, microporosity, and CH4 adsorptivity of the parent carbons due to Mg deposition were examined. DTA results, chemical analysis, and DRIFT spectra indicate that Mg species are mainly supported on the -COOH groups of the parent carbons, which serve as the catalysts to improve the oxidation activity of carbon. Mg deposition either increases or decreases the specific surface area, pore volume, and average micropore width of the parent carbon depending on the preoxidation temperatures. Mg deposition does not simply enhance CH4 adsorptivity: the complex changes are due to the differences in the supporting states of Mg species and slight modifications in micropore structure.
氧化镁/氢氧化镁沉积在预先在不同温度下于空气中氧化的沥青基活性炭纤维上，并研究了由于镁沉积导致的母体碳的碳氧化活性、微孔率和CH4吸附性的变化。差示热分析（DTA）结果、化学分析和漫反射红外傅里叶变换光谱（DRIFT）表明，镁物种主要负载在母体碳的-COOH基团上，这些基团充当提高碳氧化活性的催化剂。根据预氧化温度的不同，镁沉积会增加或减少母体碳的比表面积、孔体积和平均微孔宽度。镁沉积并不会简单地增强CH4吸附性：复杂的变化是由于镁物种负载状态的差异以及微孔结构的轻微改变所致。
