基于ZSM5锆框架嵌入碳糊电极的新型锰离子电化学传感:理论建模与实验验证的综合研究

IF 8.3 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Aisha Ganash , Fatimah Hummadi , Naha Meslet Alsebaii , Aisha Al-Moubaraki , Entesar Ganash , Maryam Chafiq , Young gun Ko
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引用次数: 0

摘要

本研究描述了一种低成本的方法,利用方波阴极溶出伏安法(SWCSV)在锆沸石Socony Mobil5框架嵌入碳膏电极(Zr-ZSM5/CPE)上快速准确地测量锰离子(Mn2+)。采用傅里叶变换红外光谱(FTIR)、扫描电镜(SEM)、能量色散x射线能谱(EDX)和x射线衍射(XRD)对zr - zsm5修饰电极进行了表征。采用循环伏安法(CV)和电化学阻抗谱法(EIS)研究了Mn2+离子在Zr-ZSM5/CPE上的电化学(EC)行为。Zr-ZSM5/CPE在0.1 M乙酸(Act)缓冲溶液中,当pH、积累时间、沉积时间、扫描速率和脉冲振幅等分析参数优化时,呈现出明显的还原峰。结果表明,Mn2+离子的线性校准范围为0.01 ~ 10µM (R2 = 0.996),定量下限为7.68 × 10−5µM。该方法具有良好的准确性和可用性,是一种高效可靠的电化学传感器,用于Mn2+离子基质分析,对Mn2+离子残留物的痕量测量具有良好的回收率(93-109%)。此外,Zr-ZSM5/CPE在检测常见离子时不干扰Mn2+离子,表明其具有良好的稳定性。此外,该传感器在测定Mn2+离子方面具有出色的再现性、选择性和精度。进行了计算分析,模拟了各个方面,重点是吸附行为,能量分布和界面机制。理论研究结果强调了Zr-ZSM5框架通过将Zr结合到原始ZSM5结构的通道中,在增强传感能力方面的关键作用。这种改性改善了电子转移性能,产生了优越的反应性和EC性能,使其成为比原始ZSM5沸石框架更有效的材料。据我们所知,这是第一次讨论使用具有良好电催化活性,选择性和灵敏度的Zr-ZSM5/CPE来测量Mn2+离子。根据这项工作,在ZSM5中加入Zr原子可以产生新的功能位点,大大增强了Mn2+离子的吸附和分离过程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Innovative electrochemical sensing of manganese ions via zirconium ZSM5 framework -embedded carbon paste electrodes: A comprehensive study of theoretical modeling and experimental demonstration

Innovative electrochemical sensing of manganese ions via zirconium ZSM5 framework -embedded carbon paste electrodes: A comprehensive study of theoretical modeling and experimental demonstration

Innovative electrochemical sensing of manganese ions via zirconium ZSM5 framework -embedded carbon paste electrodes: A comprehensive study of theoretical modeling and experimental demonstration
This work describes a low-cost method of quickly and accurately measuring manganese ions (Mn2+) using square wave cathodic stripping voltammetry (SWCSV) at a zirconium Zeolite Socony Mobil5 framework-embedded carbon paste electrode (Zr-ZSM5/CPE). The Zr-ZSM5-modified electrode was examined by applying Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD). Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used to investigate the electrochemical (EC) behavior of Mn2+ ions at the Zr-ZSM5/CPE. The Zr-ZSM5/CPE in a 0.1 M acetate (Act) buffer solution exhibited a distinct reduction peak when the pH and other analytical parameters, such as accumulation duration, deposition time, scan rate, and pulse amplitude, were optimized. The results indicated that the linear calibration range of Mn2+ ions was 0.01–10 µM (R2 = 0.996), with a corresponding lower limit of quantification (LOQ) of 7.68 × 10−5µM. The new assay demonstrated good accuracy and usability as an efficient and dependable EC sensor for Mn2+ ion matrix analysis, with good recovery rates (93–109 %) for the trace measurement of Mn2+ ion residues. Moreover, the Zr-ZSM5/CPE did not interfere with Mn2+ ions in its detection of common ions, indicating its excellent stability. Additionally, the suggested sensor showed outstanding reproducibility, selectivity, and precision for determining Mn2+ ions. Computational analyses were conducted to simulate various aspects, focusing on adsorption behavior, energetic profiles, and interfacial mechanisms. Theoretical findings highlighted the Zr-ZSM5 framework's crucial role in enhancing sensing capabilities by incorporating Zr into the channels of the original ZSM5 structure. This modification improved electron transfer properties, resulting in superior reactivity and EC performance, making it a more effective material than the pristine ZSM5 zeolite framework. To our knowledge, this is the first publication discussing the use of a Zr-ZSM5/CPE with good electrocatalytic activity, selectivity, and sensitivity for Mn2+ion measurement. According to this work, adding the Zr atom to ZSM5 results in novel functional sites that greatly enhance the adsorption and separation processes of Mn2+ ions.
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来源期刊
Acta Materialia
Acta Materialia 工程技术-材料科学:综合
CiteScore
16.10
自引率
8.50%
发文量
801
审稿时长
53 days
期刊介绍: Acta Materialia serves as a platform for publishing full-length, original papers and commissioned overviews that contribute to a profound understanding of the correlation between the processing, structure, and properties of inorganic materials. The journal seeks papers with high impact potential or those that significantly propel the field forward. The scope includes the atomic and molecular arrangements, chemical and electronic structures, and microstructure of materials, focusing on their mechanical or functional behavior across all length scales, including nanostructures.
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