正在研究使用不同聚合物的氧化铜改性电化学传感器的有效性。将市售粉末在异丙醇溶液和蒸馏水中与5重量%的聚合物(壳聚糖,Nafion,PVP,HPC,α-松油醇)。观察到壳聚糖和Nafion引起CuO的降解,但Nafion稀释后形成了稳定的混合物.将修饰的电极滴注并使用循环伏安法在0.1MKCl+3mM[Fe(CN)6]3-/4-溶液中进行分析以确定电化学活性表面积(EASA)。结果表明,α-松油醇形成团聚体,虽然HPC造成了不均匀分布,导致稳定性差。另一方面,Nafion和PVP形成均匀层,PVP显示最高的EASA为0.317cm2。在磷酸盐缓冲盐水(PBS)中,HPC和PVP表现出稳定的信号。Nafion在各种电解质中保持最稳定,使其适用于传感应用。在0.1MNaOH中的测试显示HPC不稳定,PVP的部分溶解,和铜离子还原。所使用的聚合物的类型显著影响CuO传感器的性能。Nafion和PVP由于其稳定性和CuO的有效分散而显示出最大的前景。聚合物-CuO组合的进一步优化对于增强传感器功能是必要的。
The effectiveness of copper oxide-modified electrochemical sensors using different polymers is being studied. The commercial powder was sonicated in an isopropyl alcohol solution and distilled water with 5 wt% polymers (chitosan,
Nafion, PVP, HPC, α-terpineol). It was observed that the chitosan and
Nafion caused degradation of CuO, but
Nafion formed a stable mixture when diluted. The modified electrodes were drop-casted and analyzed using cyclic voltammetry in 0.1 M KCl + 3 mM [Fe(CN)6]3-/4- solution to determine the electrochemically active surface area (EASA). The results showed that α-terpineol formed agglomerates, while HPC created uneven distributions, resulting in poor stability. On the other hand,
Nafion and PVP formed homogeneous layers, with PVP showing the highest EASA of 0.317 cm2. In phosphate-buffered saline (PBS), HPC and PVP demonstrated stable signals.
Nafion remained the most stable in various electrolytes, making it suitable for sensing applications. Testing in 0.1 M NaOH revealed HPC instability, partial dissolution of PVP, and Cu ion reduction. The type of polymer used significantly impacts the performance of CuO sensors.
Nafion and PVP show the most promise due to their stability and effective dispersion of CuO. Further optimization of polymer-CuO combinations is necessary for enhanced sensor functionality.