Morphological analysis of ultra fine {\alpha}-MnO2 nanowires under different reaction conditions

TL;DR

This paper presents a simple hydrothermal synthesis method for ultra-fine single-crystal { extalpha}-MnO2 nanowires, analyzing how reaction conditions influence their morphology using various characterization techniques.

Contribution

It introduces a seedless, template-free hydrothermal method for synthesizing ultra-fine { extalpha}-MnO2 nanowires and studies the effects of reaction parameters on their morphology.

Findings

Nanowires have diameters of 10-40 nm and lengths up to 2 μm.

Reaction temperature, time, and molar ratios significantly affect nanowire morphology.

The synthesis method is simple and effective for controlled nanowire production.

Abstract

A simple hydrothermal method was developed for the synthesis of ultra fine single-crystal {\alpha}-MnO2 nanowires by only using potassium permanganate and sodium nitrite in acidic solution, without any seed or template. Detailed analysis of the obtained nanowires was done using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and high resolution transmission electron microscopy (HRTEM) measurements. The as-prepared {\alpha}-MnO2 nanowires have the average diameter of 10-40nm and a length up to 0.1 to 2{\mu}m. Moreover, the effects of reaction temperature, time and reactant molar ratios on the morphology of the final product were studied in detail using field emission scanning electron microscopy (FESEM) measurements.