摘要
在多孔金膜表面电沉积铂纳米颗粒,制备了多孔金膜/铂纳米颗粒修饰电极。其中多孔金膜是在恒电位氧化后再在抗坏血酸溶液中还原制得的。利用循环伏安法(CV)对甲醛在此传感界面上的电化学行为进行了研究,结果表明,在酸性条件下,该传感器对甲醛表现出较好的电催化性能。在优化条件下,甲醛的峰电流与浓度在1×10-5mol/L到1×10-3mol/L范围内呈良好的线性关系,检出限5×10-6mol/L。
Platinum nanoparticles were electrochemically deposited on a gold-nanoporous film coated gold electrode to prepare a sensor for detection of formaldehyde. Gold-nanoporous film was obtained by anodizing the gold electrode under a high potential and then reduced by freshly prepared ascorbic acid （AA） solution. The electrochemical behaviors of formaldehyde at the sensing surface were studied by cyclic voltammetry. The results showed that this Pt-nanoparticle-coated gold-nanoporous film （PGNF） electrode had good electroeatalytic ability for the redox of formaldehyde in acidic medium. Under optimal conditions, the peak current of formaldehyde was linear to its concentration from 1 ×10^-5 mol/L to 1 ×10^-3 mol/L with a detection limit of 5 ×10^-6 mol/L.
出处
《化学传感器》
CAS
2013年第3期55-60,共6页
Chemical Sensors
关键词
铂纳米颗粒沉积多孔金膜
甲醛
电催化
Pt-nanoparticle-coated gold-nanoporous film
formaldehyde
electrocatalytic
