Utilization of response surface methodology in the optimization of electrodeposition preparation of FTO/AuNPs electrodes

IF 2.1 4区 材料科学 Q2 MATERIALS SCIENCE, CERAMICS
Van Vien Nguyen, Van Loc Thai, Hoang Long Ngo, Canh Minh Thang Nguyen, Hoa Thi Lai, Thanh Tung Nguyen, Viet Hai Le, Thai Hoang Nguyen
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Abstract

In this research, gold nanoparticles coated on fluorine-doped tin oxide glass (AuNPs/FTO) electrodes were synthesized via electrodeposition of HAuCl4 in H3PO4 using cyclic voltammetry. For response surface methodology (RSM), a central composite design model consisting of 16 runs with three different electrodeposition parameters, such as potential window, scan rate and cycle number was used to optimize the preparation parameters. Optimization and experimental data analysis using RSM were performed using Design Expert 11 statistical data analysis program. Data was fitted into a polynomial equation that shows all of the possible interactions of the parameters and their effects on the response (the electrocatalytic activity in the 5 × 10-3 M K3[Fe(CN)6] in 0.5 M KNO3 solutions by cyclic voltammetry). The optimized preparation parameters consist of potential window ranging from − 0.51 V to 0.6 V, scan rate of 81 mV.s-1, and cycle number of 70, and with the current density of 965.909 µA.cm-1. These factors have been compared with the experiment and the results show that there is no large error, which proves that the model can provide good repeatability and accurate optimization. For the As(III) determination, the sensitivity, LOD and LOQ values of the optimized electrode were found to be 1.5 µA.cm-2.ppb-1, 1.13 ppb and 3.43 ppb, respectively, indicating that the fabricated electrode can be applied for the determination of aqueous arsenic.

Abstract Image

响应面法在FTO/AuNPs电极电沉积工艺优化中的应用
在本研究中,采用循环伏安法将HAuCl4电沉积在H3PO4中,制备了包被在掺氟氧化锡玻璃(AuNPs/FTO)电极上的金纳米颗粒。在响应面法(RSM)中,建立了一个包含16次运行的中心复合设计模型,采用3种不同的电沉积参数(如电位窗、扫描速率和循环数)来优化制备参数。采用Design Expert 11统计数据分析程序进行RSM优化和实验数据分析。数据拟合到一个多项式方程中,该方程显示了所有可能的参数相互作用及其对响应的影响(通过循环伏安法测定5 × 10-3 M K3[Fe(CN)6]在0.5 M KNO3溶液中的电催化活性)。优化后的制备参数为电位窗口为- 0.51 V ~ 0.6 V,扫描速率为81 mv - s-1,周期数为70,电流密度为965.909µA.cm-1。将这些因素与实验结果进行了比较,结果表明没有大的误差,证明该模型可以提供良好的重复性和精确的优化。对于As(III)的测定,优化电极的灵敏度、LOD和LOQ值均为1.5µA.cm-2。分别为PPB -1、1.13 PPB和3.43 PPB,表明所制备的电极可用于水中砷的测定。
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来源期刊
Journal of the Australian Ceramic Society
Journal of the Australian Ceramic Society Materials Science-Materials Chemistry
CiteScore
3.70
自引率
5.30%
发文量
123
期刊介绍: Publishes high quality research and technical papers in all areas of ceramic and related materials Spans the broad and growing fields of ceramic technology, material science and bioceramics Chronicles new advances in ceramic materials, manufacturing processes and applications Journal of the Australian Ceramic Society since 1965 Professional language editing service is available through our affiliates Nature Research Editing Service and American Journal Experts at the author''s cost and does not guarantee that the manuscript will be reviewed or accepted
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