Electrochemical sensing mechanism of ammonium ions over an Ag/TiO<sub>2</sub> composite electrode modified by hematite
Shilin Zhang, Jinqing Hu, Sam Fong Yau Li, Hongxiu Lu, Gang Wang, Chang Lu, Muhammad Tariq Sarwar, Aidong Tang, Huaming Yang
Abstract
with a detection limit of 0.18 µM under non-alkaline conditions, a short response time of 3 s, good reproducibility, and fine selectivity among various interferents, and is also successfully used in real water bodies to display high accuracy. Furthermore, this new mechanism has a certain universality in a range of Ag (main catalyst)/transition metal oxide (cocatalyst)/TNT sensing systems. This work offers a new design basis for the urgently needed electrochemical ammonia nitrogen sensors.
Topics & Concepts
ElectrochemistryHematiteElectrodeComposite numberIonAmmoniumInorganic chemistryChemistryMechanism (biology)Chemical engineeringMaterials scienceMineralogyComposite materialOrganic chemistryPhysical chemistryEpistemologyPhilosophyEngineeringElectrochemical sensors and biosensorsElectrochemical Analysis and ApplicationsAnalytical Chemistry and Sensors