双金属有机框架(铁、铜)/碳纳米管封装镍纳米粒子作为异相催化剂在类似芬顿的过程中降解酸性橙 7 染料

IF 2.2 4区 化学 Q3 CHEMISTRY, MULTIDISCIPLINARY Journal of the Iranian Chemical Society Pub Date : 2024-09-21 DOI:10.1007/s13738-024-03086-8
Pouya Tahmasebi, Jalal Basiri Parsa
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引用次数: 0

摘要

新型异相催化剂--双金属有机框架(铁、铜)/碳纳米管包裹镍纳米粒子--被引入到通过类似芬顿的过程高效降解酸性橙 7(AO7)的研究中。采用基于五级中心复合设计(CCD)的响应面方法(RSM)对异质降解过程进行了优化和建模。对 pH 值、H2O2 浓度(mM)、催化剂剂量(mg L-1)和反应时间(min)等四个操作参数的单独效应和交互效应的研究表明,在 pH 值 = 4.0、H2O2 浓度 = 25 mM、催化剂剂量 = 200.0 mg L-1 和反应时间 = 27 min(k = 0.1024 (min-1))的最佳条件下,AO7 降解效率最高(93.94%)。清除分析表明,在最佳条件下,叔丁醇(TBA)显著降低了 AO7 的降解。当 TBA 浓度从 0 到 9 mmol L-1 变化时,AO7 的降解率从 93.94% 下降到 14.28%。因此,随着淬灭剂浓度的增加,降解反应的速率常数从 0.1002 min-1 降至 0.0058 min-1。有趣的是,除了 Fe0.6Cu0.3Ni0.1(BDC)@CNT 中的铁、铜和镍物种的作用外,CNT 表面的氧官能团还能在更宽的 pH 值范围内提供更快、更高效的铁(III)/铁(II)循环。此外,考虑到经济和环境问题的重要性,研究还证实,Fe0.6Cu0.3Ni0.1(BDC)@CNT 催化剂可以连续再生四次。本研究的结论为开发和利用先进的基于 MOF 的催化剂以实现有效的环境修复提供了有利的结果。 图文摘要
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Bimetallic-organic framework (Fe, Cu)/carbon nanotubes encapsulated Ni nanoparticles as heterogeneous catalyst in Fenton-like process for degradation of acid orange 7 dye

The novel heterogeneous catalyst, Bimetallic-organic framework (Fe, Cu)/carbon nanotubes encapsulated Ni nanoparticles, has been introduced for efficient degradation of acid orange 7 (AO7) via Fenton-like process. Optimizing and modeling of the heterogeneous degradation process were performed using response surface methodology (RSM) based on a five-level central composite design (CCD). The study on the individual and interaction effect of four operating parameters including pH, H2O2 concentration (mM), catalyst dose (mg L−1) and reaction time (min) revealed that the maximum AO7 degradation efficiency (93.94%) was achieved under optimal conditions of pH = 4.0, H2O2 concentration = 25 mM, catalyst dose = 200.0 mg L−1 and reaction time = 27 min (k = 0.1024 (min−1)). Analysis of scavenging revealed that tertiary butyl alcohol (TBA) led to a notable reduction in the degradation of AO7 under optimal conditions. The degradation of AO7 dropped from 93.94% to 14.28% as TBA concentrations varied from 0 to 9 mmol L−1. Consequently, the rate constant of the degradation reaction decreased from 0.1002 to 0.0058 min−1 as the concentration of the quenching agent increased. Interestingly, it was found that besides the role of Fe, Cu and Ni species in the Fe0.6Cu0.3Ni0.1(BDC)@CNT, surface oxygen-functional groups on the CNT provides faster and efficient Fe(III)/Fe(II) cycle over a broader pH range. Furthermore, concerning the importance of economic and environmental issues, the possibility of regenerating the Fe0.6Cu0.3Ni0.1(BDC)@CNT catalyst for four consecutive cycles has been confirmed. The concluding observations of this study provide favorable outcomes in the development and utilizing the advanced MOF-based catalysts with the aim of effective environmental remediation.

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来源期刊
CiteScore
4.40
自引率
8.30%
发文量
230
审稿时长
5.6 months
期刊介绍: JICS is an international journal covering general fields of chemistry. JICS welcomes high quality original papers in English dealing with experimental, theoretical and applied research related to all branches of chemistry. These include the fields of analytical, inorganic, organic and physical chemistry as well as the chemical biology area. Review articles discussing specific areas of chemistry of current chemical or biological importance are also published. JICS ensures visibility of your research results to a worldwide audience in science. You are kindly invited to submit your manuscript to the Editor-in-Chief or Regional Editor. All contributions in the form of original papers or short communications will be peer reviewed and published free of charge after acceptance.
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