State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, PR China.
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, PR China.
J Hazard Mater. 2020 Jun 15;392:122342. doi: 10.1016/j.jhazmat.2020.122342. Epub 2020 Feb 19.
In this work, a self-supported electrode has been designed and fabricated based on carbon cloth-supported polyaniline array and Pt nanosheets (Pt-PANI-CC). PANI array was firstly loaded on the surface of CC via chronoamperometry technique, and then, Pt nanosheets were deposited on the per-grown PANI array through amperometric measurement. The hierarchical structure of Pt-PANI-CC electrode and unique sheet-like Pt nanoparticles offered large specific surface and response centers. The electrochemical sensor based on Pt-PANI-CC electrode has been successfully constructed for detection of ammonia. The experiment results demonstrated that Pt-PANI-CC displayed great catalytic activity for electro-oxidation of ammonia and exhibited acceptable performances for sensing ammonia with low detection limit of 77.2 nM and wide linear range from 0.5 μM to 550 μM. Moreover, the anti-interference ability, reusability, reproducibility and stability of sensor have been investigated and showed great performances. This work provides a promising way for designing self-supported sensing electrode toward a wide electrochemical detection.
在这项工作中，设计并制备了一种基于碳纤维布负载聚苯胺阵列和铂纳米片（Pt-PANI-CC）的自支撑电极。通过计时安培法首先将聚苯胺阵列负载在 CC 表面上，然后通过恒电流测量将铂纳米片沉积在生长的聚苯胺阵列上。Pt-PANI-CC 电极的分层结构和独特的片状铂纳米粒子提供了大的比表面积和反应中心。基于 Pt-PANI-CC 电极的电化学传感器已成功构建用于检测氨。实验结果表明，Pt-PANI-CC 对氨的电化学氧化具有很大的催化活性，并且对氨的传感具有可接受的性能，检测限低至 77.2 nM，线性范围从 0.5 μM 到 550 μM。此外，还研究了传感器的抗干扰能力、可重复使用性、重现性和稳定性，表现出了优异的性能。这项工作为设计用于广泛电化学检测的自支撑传感电极提供了一种有前途的方法。
