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Synthesis of microcrystalline indium (III)-MOF and adsorptive and selective removal of dyes
Research on Chemical Intermediates ( IF 2.8 ) Pub Date : 2023-10-17 , DOI: 10.1007/s11164-023-05161-w
Ketan Maru , Sarita Kalla , Arup K. Ghosh , Ritambhara Jangir

Dye pollution is a significant environmental catastrophe, and it has so far proven to be challenging to purify dye-contaminated water effectively. Metal–organic frameworks (MOFs) have potential of removing dyes from wastewater but effectively addressing the simultaneous removal of multiple dyes remains a challenging task. In-MOF, synthesized in the round-bottom flask, sealed glass tubes, and under microwave conditions, exhibits excellent adsorption for cationic dyes. The identification and characterization of In-MOF were accomplished using several analytical techniques, including Powder X-ray diffraction, Fourier-transform infrared spectroscopy, Brunauer–Emmett–Teller analysis, Thermogravimetric analysis, Scanning electron microscope, Energy-dispersive X-ray spectroscopy, Elemental analysis, and Density functional theory for structure elucidation. In-MOF exhibits outstanding dye removal efficiency for Methylene Blue (MB: 98%; 18.6 mg/g), Azure A (AZA: 99%; 22.4 mg/g), Azure B (AZB: 98%; 17.2 mg/g), Toluidine Blue O (TOLO: 99%; 20.6 mg/g), Rhodamine B (RHB: 82%; 8.8 mg/g), and Congo red (CR: 93%; 14.2 mg/g) individually. Moreover, In-MOF demonstrates remarkable selectivity towards MB removal even in the presence of RHB. The kinetics of adsorption and reusability tests for MB indicate consistent removal capacity for the initial three cycles, but a significant decline of up to 52% is observed by the sixth cycle. These findings establish In-MOF as a promising candidate for industrial applications due to its high removal efficiency and practical synthetic approach.



中文翻译:

微晶铟(III)-MOF的合成及其吸附和选择性去除染料

染料污染是一场重大的环境灾难,迄今为止,有效净化染料污染的水体已被证明具有挑战性。金属有机框架(MOF)具有去除废水中染料的潜力,但有效解决同时去除多种染料仍然是一项具有挑战性的任务。In-MOF 在圆底烧瓶、密封玻璃管和微波条件下合成,对阳离子染料表现出优异的吸附作用。In-MOF 的鉴定和表征是通过多种分析技术完成的,包括粉末 X 射线衍射、傅里叶变换红外光谱、Brunauer-Emmett-Teller 分析、热重分析、扫描电子显微镜、能量色散 X 射线光谱、元素分析和用于结构阐明的密度泛函理论。In-MOF 对亚甲基蓝 (MB: 98%; 18.6 mg/g)、Azure A (AZA: 99%; 22.4 mg/g)、Azure B (AZB: 98%; 17.2 mg/g) 表现出出色的染料去除效率、甲苯胺蓝 O(TOLO:99%;20.6 mg/g)、罗丹明 B(RHB:82%;8.8 mg/g)和刚果红(CR:93%;14.2 mg/g)。此外,即使在 RHB 存在的情况下,In-MOF 也表现出对 MB 去除的显着选择性。MB 的吸附动力学和可重复使用性测试表明,前三个循环的去除能力一致,但到第六个循环时观察到高达 52% 的显着下降。这些发现使 In-MOF 因其高去除效率和实用的合成方法而成为工业应用的有前途的候选者。

更新日期:2023-10-17
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