钯铜双金属气凝胶作为用于高灵敏度测定实际样品中双酚A的新型改性剂
Palladium-Copper Bimetallic Aerogel as New Modifier for Highly Sensitive Determination of Bisphenol A in Real Samples.
作者信息
Fang Zehao, Wang Junyan, Xue Yilei, Khorasani Motlagh Mozhgan, Noroozifar Meissam, Kraatz Heinz-Bernhard
机构信息
Department Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON M1C 1A4, Canada.
Department of Chemistry, University of Toronto, 280 St. George Street, Toronto, ON M5S 3H6, Canada.
出版信息
Materials (Basel). 2023 Sep 5;16(18):6081. doi: 10.3390/ma16186081.
In this study, a bimetallic palladium-copper aerogel was synthesized and used for modification of a graphite paste electrode (Pd-Cu/GPE), allowing the sensitive determination of bisphenol A (BPA). Different techniques, such as SEM, TEM, XPS, and AFM, were used for characterization of the Pd-Cu aerogel. To elucidate the properties of the Pd-Cu/GPE, the electrochemistry methods such as differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy were used. DPV measurements were conducted in phosphate electrolyte and buffer solution (0.2 M PBS, pH 5) at a potential range from 0.4 to 0.9 V vs. Ag/AgCl. The DPVs peaks currents increased linearly with BPA concentrations in the 0.04-85 and 85-305 µM ranges, with a limit of detection of 20 nM. The modified electrode was successfully used in real samples to determine BPA, and the results were compared to the standard HPLC method. The results showed that the Pd-Cu/GPE had good selectivity, stability, and sensitivity for BPA determination.
在本研究中，合成了一种双金属钯 - 铜气凝胶，并将其用于修饰石墨糊电极（Pd - Cu/GPE），从而实现对双酚A（BPA）的灵敏测定。采用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线光电子能谱（XPS）和原子力显微镜（AFM）等不同技术对钯 - 铜气凝胶进行表征。为阐明Pd - Cu/GPE的性质，使用了差分脉冲伏安法（DPV）和电化学阻抗谱等电化学方法。DPV测量在磷酸盐电解质和缓冲溶液（0.2 M PBS，pH 5）中进行，相对于Ag/AgCl的电位范围为0.4至0.9 V。在0.04 - 85和85 - 305 μM范围内，DPV峰电流随BPA浓度呈线性增加，检测限为20 nM。该修饰电极成功用于实际样品中BPA的测定，并将结果与标准高效液相色谱法进行比较。结果表明，Pd - Cu/GPE对BPA测定具有良好的选择性、稳定性和灵敏度。
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