Metal-organic frameworks (MOFs) are newly introduced category of porous compounds reflected as proficient and economic to exclude organic dyes from water. In the present work, a metal doping strategy in MOFs has been introduced to enhance the efficiency of porous MOFs for adsorption of environmentally detrimental rhodamine B (Rh-B). The porous ZIF-67 and metal-doped MOFs (Fe@ZIF-67) having Fe metal composition 1%, 3% and 5% were fabricated by in situ doping strategy during a simple solvothermal synthesis of ZIF-67. The spectroscopic characterization showed that limited metal-doping did not affect the characteristic features of MOFs like structural topology, porosity and surface area. The highest observed adsorption amount of Fe@ZIF-67 (5%) calculated with Langmuir model was 135.14 mg. g⁻¹, considerably higher as compared to pristine ZIF-67 (85.69 mg. g⁻¹) and other synthesized MOFs. The adsorption experiments data was well fitted by Langmuir model (R² = 0.998) clarified that the adsorption process of Rh-B was monolayer and specified a stronger electrostatic interaction between Rh-B and porous Fe@ZIF-67 with 5% Fe, which was reliable with the observation from the effects of pH and ionic strength. The results showed that 47.71, 64.52 and 79.92% of rhodamine B dye removed by Fe@ZIF-67 (1%), Fe@ZIF-67 (3%) and Fe@ZIF-67 (5%) respectively with 240 minutes contact time. The recycling experiments also disclosed high stability of the Fe-doped MOFs. Up to 92% adsorption efficiency was examined after four regeneration cycles. All of the outcomes shown a pronounced prospective of the synthesized Fe@ZIF-67 nanocomposite in water treatment/purification in the industry.

金属有机框架 (MOF) 是新引入的一类多孔化合物，反映了从水中排除有机染料的能力和经济性。在目前的工作中，已经引入了 MOF 中的金属掺杂策略，以提高多孔 MOF 吸附对环境有害的罗丹明 B (Rh-B) 的效率。在 ZIF-67 的简单溶剂热合成过程中，通过原位掺杂策略制备了多孔 ZIF-67 和金属掺杂的 MOF（Fe@ZIF-67），其金属成分为 1%、3% 和 5%。光谱表征表明，有限的金属掺杂不会影响 MOF 的特征，如结构拓扑、孔隙率和表面积。用朗缪尔模型计算的 Fe@ZIF-67 的最高观察吸附量（5%）为 135.14 mg。克^-1，与原始 ZIF-67 (85.69 mg.g ^-1 ) 和其他合成 MOF相比，显着更高。吸附实验数据符合朗缪尔模型（R ²= 0.998) 阐明了 Rh-B 的吸附过程是单层的，并且指定了 Rh-B 与具有 5% Fe 的多孔 Fe@ZIF-67 之间更强的静电相互作用，从 pH 和离子强度的影响观察，这是可靠的. 结果表明，Fe@ZIF-67（1%）、Fe@ZIF-67（3%）和Fe@ZIF-67（5%）在接触240分钟后分别去除了47.71%、64.52%和79.92%的罗丹明B染料时间。回收实验还揭示了 Fe 掺杂 MOF 的高稳定性。在四次再生循环后检查了高达 92% 的吸附效率。所有结果都表明合成的 Fe@ZIF-67 纳米复合材料在工业水处理/净化中具有明显的前景。