Investigations on tri manganese tetra oxide nano particles prepared by thermal decomposition

Abstract

Oxides of manganese have large number of applications in the field of sensors, piezoelectric crystals etc. In the present work, Mn 3 O 4 nano materials were synthesized by using manganese acetate, adopting the method of thermal decomposition. The Nano materials thus prepared were characterized by employing various techniques like PXRD, FTIR, UV and Thermal analyses. The average particle size, calculated using Debye-Scherrer formula, was found to be in the range of 51 -62 nm. The presence of Mn 3 O 4 is also confirmed from FTIR. Thermal studies were also carried out. The optical band gap for the prepared nano materials was obtained from the UV-spectroscopic studies.

Efficient catalytic degradation of single and binary azo dyes by a novel triple nanocomposite of Mn3O4/Ag/SiO2

“…Figure 2(a) shows the crystalline structure of Mn 3 O 4 nanoparticles which indexed to (200), (103), (220), (303), and (400) crystal planes and correspond to the 2θ values of 33.05 o , 34.50 o , 45.04 o ,55.38 o and 65.89 o . [ 42,43 ] Figure 2(b) shows the crystalline structure with several significant peaks for Mn 3 O 4 /Ag nanocomposite. The XRD patterns consisted of three well‐defined peaks at 2 θ values 38.8 o , 56.44 o , and 75.92 o , which were respectively indexed as (111), (220) and (311) of metallic silver nanoparticles [ 38 ] in addition to the same peaks of crystalline Mn 3 O 4 indicating the formation of Mn 3 O 4 /Ag nanocomposite.…”

“…The two bands at 801.278 and 486.938 cm −1 are assigned to the Si-O-Si stretching and Si-O-Si bending, respectively. [41] 3.2 | XRD [42,43] Figure 2(b) shows the crystalline structure with several significant peaks for Mn 3 O 4 /Ag nanocomposite. The XRD patterns consisted of three well-defined peaks at 2 θ values 38.8 o , 56.44 o , and 75.92 o , which were respectively indexed as (111), (220) and (311) of metallic silver nanoparticles [38] in addition to the same peaks of crystal- [ 44,45]…”