One-pot combustion synthesis of nickel oxide and hematite: From simple coordination compounds to high purity metal oxide nanoparticles

Abstract

This work is the first report of a very simple and fast one-pot synthesis of nickel oxide (NiO) and hematite (?-Fe2O3) nanoparticles by thermal decomposition of transition metal aqua complexes with camphor sulfonate anions. Obtained nanopowders were characterized by X-ray powder diffraction, Fourier transform IR analysis, scanning electron microscopy, and Energy-dispersive X-ray spectroscopy. X-ray powder diffraction confirmed the formation of high purity NiO and ?-Fe2O3 crystal phases. In the case of ?-Fe2O3, about five times larger average crystallite size was obtained. Fourier transform IR spectra of synthesized materials showed characteristic peaks for NiO and ?-Fe2O3 nanostructures. To visualize the morphology and the chemical composition of the final products Scanning electron microscopy and Energy-dispersive X-ray spectroscopy were performed. The thermogravimetric analysis was done for a better understanding of the general thermal behavior of precursor compounds. This easy-to-perform and fast preparation method opens a broad range of obtained materials? usage, particularly due to its economic viability

Removal of the As(V) and Sr(VI) from the water using magnetite/3D-printed wollastonite hybrid adsorbent

“…The data obtained from the experiments were compared with the models of Langmuir, Freundlich, Temkin, Dubinin-Radushkevich, and Toth isotherms (Table SV), the parameters of which are shown in Table III. In order to fit the experimental adsorption data with the isotherm models, nonlinear regression was used; the normalized standard deviation Δq was calculated together with the correlation coefficient R 2 . By analyzing the experimental data on the adsorption of As(V) and Cr(VI) ions on the tested adsorbent, the best fit is given by the Freundlich isothermal model Figs.…”

“…Modern human society invests significant efforts to reduce pollution and to diminish its negative influence on the environment [1,2]. Consequently, the polluted environment has a negative effect on the health and overall life quality of the human population, as well as on the existence of other living organisms.…”

BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties

“…Many different methods were developed for the synthesis of nanocrystalline nickel-and zinc ferrites with tailored characteristics [46][47][48][49][50][51]. The thermal decomposition of coordination compounds with simple organic ligands emerged as a method of choice due to the low reaction temperatures [52][53][54][55][56][57][58]. Metal carbonyls, metal carboxylates, and metal acetylacetonates were recognized as precursors to fabricate nanostructured magnetic oxides with uniform and narrow size distribution of nanoparticles, due to their high purity and cheap production [59][60][61][62][63][64][65].…”

Development and Characterization of Fe3O4@Carbon Nanoparticles and Their Biological Screening Related to Oral Administration

“…In order to obtain these biomedical characteristics, it is necessary to choose a synthesis method which offers several advantages. To this end, from the myriad of synthesis methods that can be applied, the simplest and most economically advantageous and environmentally friendly proved to be the combustion method [37][38][39][40][41]. The interest in the combustion method is highlighted by the possibility of obtaining various nanomaterials with tailored properties, only by changing the synthesis conditions and controlling the parameters of the reaction [42], these representing the highest advantages of the combustion method.…”