【摘要】 稀土材料中的痕量Al杂质对稀土材料的性能具有严重的危害,因此,有效去除稀土中的Al杂质具有重大的意义。本文采用豌豆为碳源,合成了一种含氮炭材料AC-P700,并对其进行了比表面分析、红外表征及XPS测试。研究了AC-P700对Al(Ⅲ)的吸附性能和识别性能,并分析探索了识别机理。AC-P700的比表面为1277.1m~2/g,平均孔径为1.90nm。AC-P700对Al(Ⅲ)具有良好的吸附性能和识别选择性能。吸附容量可以达到14.3mg/g。相对于La(Ⅲ)和Ce(Ⅲ),AC-P700对Al(Ⅲ)的选择性系数可以分别达到9.6和8.7。另外,还具有良好的再生与重复使用性能。更多还原

【Abstract】 Efficiently removing of Al(Ⅲ) from rare earth is very significant, because even trace amount of Al(Ⅲ) can cause serious harm to the rare earth materials. In this paper, a nitrogen-containing activated carbon, AC-P700, was synthesized using peas as raw materials. The AC-P700 was characterized by surface area analyzer, FT-IR, and XPS methods. The adsorption and recognition properties of AC-P700 towards Al(Ⅲ) were investigated, and the recognition mechanism was also analyzed. The BET special surface area of AC-P700 was 1277.1m2/g, and the average pore diameter was 1.90 nm. The AC-P700 possesses strong adsorption affinity and excellent recognition selectivity towards Al(Ⅲ). The adsorption capacity for Al(Ⅲ) could reach 14.3mg/g, and relative selectivity coefficients with respect to La(Ⅲ) and Ce(Ⅲ) is 9.6 and 8.7, respectively. Besides, AC-P700 possesses better regeneration ability and reusability.更多还原