Title :
Facile hydrothermal synthesis of ultra-long manganese oxyhydroxide nanorods and their transformation into MnO2 and Mn2O3 nanorods
Author :
Chun Zhong Li ; Si Si Chen ; Chao Dong ; Xu Hong Chen ; Quan Fa Zhou
Author_Institution :
Sch. of Chem. & Environ. Eng., Jiangsu Univ. of Technol., Changzhou, China
Abstract :
Single-crystal manganese oxyhydroxide (MnOOH) nanorods with high aspect ratios have been successfully prepared employing a simple hydrothermal route based on the redox between potassium permanganate (KMnO4) and polyvinyl pyrrolidone (PVP). By adjusting the reaction temperature, reaction time and the mass ratio of PVP/KMnO4, MnOOH nanorods with lengths up to 20 μm and diameters in the range of 100-400 nm could be facilely prepared in high yield. The as-prepared MnOOH nanorods were characterised by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy and Fourier transformed infrared spectroscopy. The formation mechanism of MnOOH nanorods was preliminarily discussed based on the Ostwald´s ripening process. Furthermore, MnO2 and Mn2O3 nanorods with high aspect ratios were synthesised by calcination of MnOOH nanorods.
Keywords :
Fourier transform spectra; X-ray diffraction; calcination; infrared spectra; manganese compounds; nanofabrication; nanorods; oxidation; reduction (chemical); scanning electron microscopy; solid-state phase transformations; transmission electron microscopy; Fourier transform infrared spectroscopy; MnOOH; Ostwald ripening process; X-ray diffraction; calcination; facile hydrothermal method; high-resolution transmission electron microscopy; mass ratio; phase transformation; polyvinyl pyrrolidone; potassium permanganate; reaction temperature; reaction time; redox; scanning electron microscopy; size 100 nm to 400 nm; ultralong single-crystal manganese oxyhydroxide nanorods;
Journal_Title :
Micro & Nano Letters, IET
DOI :
10.1049/mnl.2013.0010
