Fe-loaded activated carbon (AC) has high surface acidity and more active sites, while manganese-loaded AC has high oxygen content. Coconut husk AC modified by Fe–Mn was studied with the aim of revealing the modification mechanism. First, HNO₃/AC was prepared using the nitric acid immersion method. Second, Fe–Mn/AC was prepared using the Fe(NO₃)₃ and Mn(NO₃)₂ sequential immersion. The effects of HNO₃, Fe(NO₃)₃, and Mn(NO₃)₂ on the pore texture and surface chemical characteristics of carbon materials were examined by scanning electron microscopy, Brunauer–Emmett–Teller (BET) analysis, X-ray diffraction and Fourier-transform infrared spectroscopy. The surface topography, pore structure, active material, and functional groups of AC, HNO₃/AC, and Fe–Mn/AC were systematically studied. The following results were obtained. The surface of HNO₃/AC has more ditches and air voids; the micropores of HNO₃/AC are deformed and flattened compared to those of AC. The surface of Fe–Mn/AC exhibits an accumulation phenomenon. MnFe₂O₄ and FeMn₂O₄ formed more pore structures. AC and HNO₃/AC have numerous micropores. The higher loading quantity of Fe–Mn results in bigger specific surface. The active components of Fe–Mn/AC-1, Fe–Mn/AC-2, Fe–Mn/AC-3, and Fe–Mn/AC-4 are MnFe₂O₄, Mn_0.43Fe_2.57O₄, Mn₃O₄, and α-Fe₂O₃, respectively. The surface functional groups of AC and HNO₃/AC are oxygen-containing functional groups. The effect of Fe–Mn modifying conditions on functional group species is rare; however, Fe/AC has more oxygen-containing functional groups. These research findings can aid in the desulfurization and denitrification of the Fe–Mn/AC catalyst.

负载铁的活性炭（AC）具有较高的表面酸度和更多的活性位，而负载锰的AC具有较高的氧含量。研究了铁锰修饰的椰子壳AC，以揭示其修饰机理。首先，使用硝酸浸渍法制备HNO ₃ / AC。其次，使用Fe（NO ₃）₃和Mn（NO ₃）₂顺序浸没法制备Fe-Mn / AC 。HNO ₃，Fe（NO ₃）₃和Mn（NO ₃）_2的影响通过扫描电子显微镜，Brunauer-Emmett-Teller（BET）分析，X射线衍射和傅里叶变换红外光谱对碳材料的孔结构和表面化学特性进行了研究。系统地研究了AC，HNO ₃ / AC和Fe–Mn / AC的表面形貌，孔结构，活性材料和官能团。获得了以下结果。HNO ₃ / AC的表面上有更多的沟槽和气孔。与AC相比，HNO ₃ / AC的微孔变形和扁平化。Fe–Mn / AC的表面表现出聚集现象。MnFe ₂ O ₄和FeMn ₂ O ₄形成更多的孔结构。AC和HNO₃ / AC具有许多微孔。Fe-Mn的负载量越高，比表面积越大。Fe–Mn / AC-1，Fe–Mn / AC-2，Fe–Mn / AC-3和Fe–Mn / AC-4的活性成分为MnFe ₂ O ₄，Mn _0.43 Fe _2.57 O ₄，Mn ₃ Ò ₄，和的α-Fe ₂ ö ₃分别。AC和HNO ₃ / AC的表面官能团是含氧官能团。Fe-Mn修饰条件对官能团种类的影响很少；然而，Fe / AC具有更多的含氧官能团。这些研究发现可以帮助Fe-Mn / AC催化剂进行脱硫和反硝化。