Formation of Mn3O4 nanobelts through the solvothermal process and their photocatalytic property

Abstract

Hausmannite Mn 3 O 4 nanobelts were synthesized from manganese acetate and potassium hydroxide precursors in the presence of melamine-ethanol-distill water via the reflux and solvothermal methods. X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) spectroscopes confirm the composition of the as-prepared product. Field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), selected area electron diffraction (SA-ED), high resolution transmission electron microscopy (HR-TEM) and N 2 adsorption-desorption isotherm results showed that the as-fabricated sample exhibits a nanosized belt-like crystal, single crystalline, tetragonal phase structure and high BET surface area. The effects of the reaction conditions such as melamine amount, solvent ratios and reaction time on the morphology of the products were studied. The band gap of the as-synthesized products was calculated via diffuse reflectance spectral analysis and their activity of catalytic oxidation was evaluated by degradation of diphenylthiocarbazone under visible-light irradiation. GC-MS instrument was used to monitor the temporal course of the catalytic reaction. The results showed that the degradation efficiency of diphenylthiocarbazone catalyzed by Mn 3 O 4 nanobelts was higher than that which had been prepared in particle and sheet-like nanocrystals.

Synthesis, phase transformation, and morphology of hausmannite Mn3O4 nanoparticles: photocatalytic and antibacterial investigations

“…24-0734. The characteristic diffractogram of formed sheet like Mn 3 O 4 nano crystals and nano particle synthesized by solvothermal approach without melamine are corroborated [34].…”

“…It functions as capping ligand. It also controls the discharge speed of Mn 2þ ions and panels the growth direction of Mn 3 O 4 nano belts [34]. It is well evidenced that the establishment of single crystalline 1D-nanobelts is through well-aligned lattice lines.…”

“…Khaled and group [34] have adopted solvo thermal method in which tetragonal Mn 3 O 4 nano belts were synthesized using coordination compound of manganese melaminate solution. The obtained nano belts matched to JCPDS # 024-0734.…”

“…The photocatalytic degradation of diphenyl thio carbazone (DPTC) by Mn 3 O 4 was reported by Ahmed et al [30,34]. Catalytic performance was interpreted using UV studies.…”

Challenges in Determining the Location of Dopants, to Study the Influence of Metal Doping on the Photocatalytic Activities of ZnO Nanopowders

“…The combination of several different characterization techniques revealed that addition of manganese ions resulted in Mn 3 O 4 grafted on the surface of the ZnO nanoparticles. Mn 3 O 4 has photocatalytic properties [55,56] but only at a pH below 4 [57]. In the present study, Rhodamine-B, an acidic dye, was used as a model organic pollutant to examine the photocatalytic activity of manganese-added ZnO.…”