Khalifa Ziad, Abo Oura Mohamed Fathi, Hathoot Abla, Azzem Magdi Abdel
Chemical Engineering Department, Faculty of Engineering, The British University in Egypt, El Sherouk City 11837, Egypt.
Electrochemistry Laboratory, Chemistry Department, Faculty of Science, Menoufia University 32512, Egypt.
R Soc Open Sci. 2024 Jun 12;11(6):231894. doi: 10.1098/rsos.231894. eCollection 2024 Jun.
In this work, palladium nanoparticles (PdNPs)/p1,5-DAN/ carbon paste electrode (CPE) and p1,5-DAN/CPE sensors have been developed for determination of hydrogen peroxide. Both sensors showed a highly sensitive and selective electrochemical behaviour, which were derived from a large specific area of poly 1,5 DAN and super excellent electroconductibility of PdNPs. PdNPs/p1,5-DAN/CPE exhibited excellent performance over p1,5-DAN/CPE. Thus, it was used for detecting hydrogen peroxide (HO) with linear ranges of 0.1 to 250 µM and 0.2 to 300 µM as well as detection limits () of 1.0 and 5.0 nM for square wave voltammetry (SWV) and cyclic voltammetry (C.V) techniques, respectively. The modified CPE has good reproducibility, adequate catalytic activity, simple synthesis and stability of peak response during HO oxidation on long run that exceeds many probes. Both reproducibility and stability for HO detection are attributable to the PdNPs immobilized on the surface of p1,5-DAN/CPE. The modified CPE was used for determining HO in real specimens with good stability, sensitivity, and reproducibility.
在本工作中，已开发出钯纳米颗粒（PdNPs）/对苯二胺（p1,5-DAN）/碳糊电极（CPE）和p1,5-DAN/CPE传感器用于测定过氧化氢。两种传感器均表现出高灵敏度和选择性的电化学行为，这源于聚1,5-DAN的大比表面积和PdNPs的超优异导电性。PdNPs/p1,5-DAN/CPE相对于p1,5-DAN/CPE表现出优异的性能。因此，它被用于检测过氧化氢（HO），方波伏安法（SWV）和循环伏安法（C.V）技术的线性范围分别为0.1至250μM和0.2至300μM，检测限分别为1.0和5.0 nM。修饰后的CPE具有良好的重现性、足够的催化活性、合成简单以及在长时间HO氧化过程中峰响应的稳定性，超过了许多探针。HO检测的重现性和稳定性均归因于固定在p1,5-DAN/CPE表面的PdNPs。修饰后的CPE用于实际样品中HO的测定，具有良好的稳定性、灵敏度和重现性。
