Biomass porous carbons derived from Laminaria japonica were prepared by KOH and H₃PO₄ activation methods, respectively. The results indicated that the chemical activation had an apparent effect on the molecular framework and space of materials. To enhance the selective adsorption for organic acids, biomass carbons were modified by dopamine combined with N-(2-aminoethyl)-3-aminopropyltrimethoxysilane. The SEM and BET results illustrated the effect of the chemical activation approach on the morphology and porous texture. The biomass porous carbon using KOH activation method had the highest surface area (up to 1558 m²/g). Compared with unmodified materials, the modified materials showed higher adsorption capacity for organic acids (27.90 μg/mL for chlorogenic acid and 25.47 μg/mL for caffeic acid). It was suggested that modification of porous carbons might be a viable pathway to increase the specific adsorption affinity and efficiency for organic acids in dried jujube samples.

分别通过KOH和H ₃ PO ₄活化方法制备了来自海带的生物质多孔碳。结果表明，化学活化对材料的分子构架和空间有明显的影响。为了增强对有机酸的选择性吸附，通过将多巴胺与N-（2-氨基乙基）-3-氨基丙基三甲氧基硅烷结合来修饰生物质碳。SEM和BET结果说明了化学活化方法对形态和多孔质构的影响。使用KOH活化法的生物质多孔碳具有最高的表面积（高达1558 m ²/G）。与未改性材料相比，改性材料对有机酸的吸附能力更高（绿原酸为27.90μg/ mL，咖啡酸为25.47μg/ mL）。有人提出，修饰多孔碳可能是增加枣干样品中有机酸的比吸附亲和力和效率的可行途径。