Rapid synthesis of hollow Ni(OH)(2) with low-crystallinity for the electrochemical detection of ascorbic acid with high sensitivity

摘要

In this work, hollow Ni(OH)(2) with low crystallinity was rapidly synthesized based on Cu2O template, which had a small particle size and high reaction activity. The resultant products were characterized by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and Raman spectroscopy. Results showed that Cu2O had a small particle size, and could shorten the reaction time for preparing hollow Ni(OH)(2). Then, Ni(OH)(2) was used to modify a glassy carbon electrode and found to perform well in ascorbic acid detection, with a linear range of 10 mu M to 0.20 mM and the detection limit of 3 mu M (S/N = 3). The sensitivity was 1747.71 mu A mM(-1) cm(-2), which was due to the hollow Ni(OH)(2) with low crystallinity.