Formation mechanism of manganese vanadate microtubes and their electrochemical sensing properties

Abstract

Abstract Manganese vanadate microtubes have been synthesized via a simple hydrothermal process using polyvinyl pyrrolidone as the surfactant. Scanning electron microscopy observation shows that polyvinyl pyrrolidone plays an essential role in the formation and phase transformation of the manganese vanadate microtubes. A polyvinyl pyrrolidone-assisted “Ostwald ripening” growth mechanism has been proposed to explain the formation process of the manganese vanadate microtubes. The electrochemical behavior of L-cysteine at the manganese vanadate microtube modified glassy carbon electrode has been analyzed. The manganese vanadate microtube modified glassy carbon electrode exhibits the performance for the electrochemical determination of L-cysteine with a detection limit of 9.2 μM and linear range of 0.01 – 2 mM.