In this work, nitrogen-doped nanoporous carbon (N-NC-800) was successfully synthesized through a facile strategy involving the direct carbonization of amino-functionalized aluminum terephthalate metal organic framework (CAU-1-NH₂) under nitrogen atmosphere. N-NC-800 was characterized by X-ray powder diffraction, Raman spectroscopy, N₂ sorption isotherm, scanning electron microscopy and high-resolution transmission electron microscopy. The adsorption performance of N-NC-800 was assessed in the removal of Methyl Orange (MO), a model toxic anionic dye, from aqueous solution. Experiments have been performed to study the effects of several parameters including solution pH, time, initial MO concentration and adsorbent dosage on the sorption efficiency. N-NC-800 exhibited excellent adsorption ability for MO and also showed good reusability. Under the optimal experimental conditions, MO removal percentage can reach up to 98.5% and the adsorbent can be reused for at least five times in succession without remarkable loss of adsorption efficiency. Moreover, the adsorption process fitted very well with a pseudo-second-order model and the adsorption equilibrium data were well described by the Langmuir isotherm. In light of its facile synthesis, superior adsorption capacity and excellent reusability, MOF-derived nitrogen-doped nanoporous carbon can be deemed as a potentially promising adsorbent for the highly-efficient removal of anionic dye contaminants from polluted industrial effluents.

在这项工作中，通过一种简便的策略成功地合成了氮掺杂的纳米多孔碳（N-NC-800），该策略涉及在氮气氛下将氨基官能化的对苯二甲酸铝金属有机骨架（CAU-1-NH ₂）直接碳化。N-NC-800的特征在于X射线粉末衍射，拉曼光谱，N ₂吸附等温线，扫描电子显微镜和高分辨率透射电子显微镜。通过从水溶液中去除甲基橙（MO）（一种有毒的阴离子模型染料）来评估N-NC-800的吸附性能。已经进行了实验以研究包括溶液pH，时间，初始MO浓度和吸附剂量的几个参数对吸附效率的影响。N-NC-800对MO表现出出色的吸附能力，并具有良好的可重复使用性。在最佳实验条件下，MO去除率可达到98.5％，吸附剂可连续重复使用至少5次，而吸附效率不会显着降低。而且，吸附过程非常适合拟二阶模型，Langmuir等温线很好地描述了吸附平衡数据。鉴于其合成简便，优异的吸附能力和出色的可重复使用性，MOF衍生的氮掺杂纳米多孔碳可被视为从污染的工业废水中高效去除阴离子染料污染物的潜在有前景的吸附剂。