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A novel method for synthesizing manganese dioxide nanoparticles using diethylenetriamine pentaacetic acid as a metal ion chelator
Journal of Industrial and Engineering Chemistry ( IF 5.9 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.jiec.2020.10.019
Yong Geun Lim , Hyeon Ji Kim , Kyeongsoon Park

Abstract Manganese dioxide nanoparticles (MnO2 NPs) have been typically synthesized using polymers as reducing agents to reduce permanganate and/or as coating agents to increase colloidal stability. However, thus far, there have been no reports regarding methods for preparing MnO2 NPs using permanganate and only metal ion chelator. Herein, we proposed a new method for synthesizing MnO2 NPs by directly reducing permanganate using diethylenetriamine pentaacetic acid (DTPA) as a metal ion chelator. MnO2 NPs were synthesized by the simple reaction of DTPA as a chelating and reducing agent with different molar ratios of potassium permanganate (KMnO4). The synthetic DTPA/MnO2 produced nano-sized particles with sizes ranging from 208 nm to 241 nm, with negatively charged surfaces. The DTPA/MnO2 NPs that were synthesized at a molar ratio of 1:4 (DTPA:KMnO4) exhibited the highest stability and storage stability in deionized water. Further, the DTPA/MnO2 NPs could be rapidly degraded in the presence of hydrogen peroxide and simultaneously generate oxygen. Thus, in this study, we report the successful synthesis of novel MnO2 NPs using the metal ion chelator DTPA. Moreover, we believe that this NP-synthesis method will be widely applied to synthesize new types of MnO2 NPs using various metal chelators.

中文翻译:

一种以二亚乙基三胺五乙酸为金属离子螯合剂合成二氧化锰纳米颗粒的新方法

摘要 二氧化锰纳米粒子 (MnO2 NPs) 通常使用聚合物作为还原剂来减少高锰酸盐和/或作为涂层剂来增加胶体稳定性来合成。然而,到目前为止,还没有关于使用高锰酸盐和金属离子螯合剂制备 MnO2 NPs 的方法的报道。在此,我们提出了一种通过使用二亚乙基三胺五乙酸 (DTPA) 作为金属离子螯合剂直接还原高锰酸盐来合成 MnO2 NPs 的新方法。通过 DTPA 作为螯合剂和还原剂与不同摩尔比的高锰酸钾 (KMnO4) 的简单反应合成了 MnO2 NPs。合成的 DTPA/MnO2 产生了尺寸范围为 208 nm 至 241 nm 的纳米级颗粒,表面带负电荷。以 1:4 的摩尔比合成的 DTPA/MnO2 NPs (DTPA: KMnO4) 在去离子水中表现出最高的稳定性和储存稳定性。此外,DTPA/MnO2 NPs 可以在过氧化氢的存在下迅速降解并同时产生氧气。因此,在本研究中,我们报告了使用金属离子螯合剂 DTPA 成功合成新型 MnO2 NPs。此外,我们相信这种 NP 合成方法将被广泛应用于使用各种金属螯合剂合成新型 MnO2 NP。
更新日期:2021-01-01
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