A Simple Preparation Process of Pure Mn3-Xcoxo4 (X= 1, 1.5 and 2) Desert Rose-Like Nanoparticles and Their Optical Properties

Abstract

Monodisperse CoMn 2 O 4 , Co 1.5 Mn 1.5 O 4 and Co 2 MnO 4 nanoparticles were prepared by a rapid and low cost method. The organic and complex dispersing agent free synthesis of stable colloidal suspensions containing pure nanoparticles of spinel oxides was optimized at low temperature (T<100 °C). The key point of the synthesis is the fast introduction of the precursor solution into a much larger volume of alkaline solution buffered with LiOH. XRD, SEM-FEG and HRTEM performed on desert rose-like nanoparticles showed that nanoparticles are crystallized and of uniform shape/size distributions. Thermogravimetric analyses give an insight into the sample composition of nanopowders in relation with semiconductor ceramic counterparts. The UV-Vis absorption spectra of these pure spinel oxide nanoparticles in solution are discussed.

Microstructural and optical properties of spinel oxide MxCo2−xMnO4 (M= Ni, Zn or Cu; 0 < x < 1) thin films prepared by inorganic polycondensation and dip-coating methods

“…These particles are made up of many smaller crystallites, corresponding to the crystallite size determined by X-ray diffraction. Salek et al [17,22] and Park et al [5] reported similar roselike morphology for Co 2 MnO 4 and Ni 0.2 Co 1.4 Mn 1.4 O 4 .…”

“…Spinel oxide nanoparticles of NCM, ZCM and CCM were prepared by a simple method based on the inorganic polycondensation of particles [17,22]. Metal (II) sulfates were dissolved in distilled water with a fixed concentration (C = 0.3 M) of solution.…”

Sustainable low temperature preparation of Mn3−xCoxO4 (0 ≤ x < 3) spinel oxide colloidal dispersions used for solar absorber thin films

“…CoMn 2 O 4 and MnCo 2 O 4 have already been prepared by soft chemistry methods [24]. This is the first study known to the authors on the complete MneCoeO spinel system synthesized at low temperature.…”

“…Our previous study showed that a maximum of conductivity was obtained for a similar distribution, according to Verwey's law and the polaron hopping mechanism [6,24,27].…”

Conduction mechanism in cobalt rich Co3-xMnxO4 (0.1 ≤ x ≤ 1.0) spinel oxide ceramics

“…Among the maximum studied spinel based on cobalt oxides are of growing attention in multidisciplinary arenas and their multifunctional applications. Cobalt manganese oxide (Co3-xMnxO4) form a special class of spinel structure with interesting catalytic [1], electronic [1][2][3], magnetic [4][5][6], optical [7], etc properties for industrial applications. For device point of view, electronic properties of solids are tremendously important for applications in storage of data, microelectronics, communication technologies and other related fields.…”