Synthesis of Cobalt Chromite Nanoparticles by Thermolysis of Mixed Cr3+ and Co2+ Chelates of 2-Mercaptopyridin N-Oxide

Abstract

Pure greenish-blue cobalt chromite (CoCr2O4) nanoparticles with narrow particle range of 4.1±1.9 nm and surface area of 78.2 m 2 ·g −1 were synthesized through mixed chelates thermolysis of corresponding metals using 2-Mercaptopyridine N-oxide sodium salt as chelating agent. During the thermolysis procedure, high amount of gases were emitted that led to the formation of nanoparticles with high surface area. The product was characterized by TGA, DTG, XRD, TEM, SEM, LLS, BET and chemical analysis. Design of experiments was performed to fulfill the two levels L4 Taguchi design. It was found that the temperature and time of thermolysis process have significant effect on the particle size reduction. The Oxidation of trichloroethylene was carried out over CoCr2O4 nanocrystallite. Catalytic activity analysis revealed that the synthesis CoCr2O4 possesses high catalytic activity for this process.

Impact of Ni Substitution on Structural, Electrical and Thermoelectrical Properties of Zinc Alluminium Chromites Synthesized by sol-gel Route and their Photocatalytic Investigation

“…It confirms the formation of a single cubic spinel phase of the entire chromite samples [32][33] . The average crystallite size (D) was calculated using the Scherrer's formula 34 .…”

A facile in situ reduction route for preparation of spinel CoCr2O4polycrystalline nanosheets and their magnetic properties

“…Additionally, this method does not yield pure products easily because of the refractory nature of chromium(III) oxide and of many of the divalent-metal oxides involved. Recently, many other preparation strategies, such as sonochemical technique, 14 hydrothermal synthesis, 13,31,32 coprecipitation, 33 solution combustion method, 24,34 sol-gel route, 35,36 ignition of CoCr 2 O 7 •4C 5 H 5 N precursor, 37 thermolysis of polymer-metal complex, [38][39][40] co-assembly strategy with the assistance of the amphiphilic diblock copolymer 41 and so on, have been effectively engaged in the synthesis of CoCr 2 O 4 materials. As for the singlecrystalline CoCr 2 O 4 , the common growth methods include chemical vapor transport, 6,10,19,[42][43][44] flux technique, 16,45,46 and floating zone method.…”

A Dicobalt Coordination Complex with a Short Cobalt‐Cobalt Distance

“…Additionally, Co 3 O 4 oxides based nanoparticles have shown to have excellent optical, and catalytic properties . Solvent‐thermal, thermolysis of the carbonyl or other cobalt complexes, and chemical reduction of cobalt salts methods were reported for the syntheses of Co 3 O 4 nanoparticle. Azide containing cobalt complexes are rarely utilized as a precursor for thermolysis synthesis of sponge Co 3 O 4 oxide (Figure ) with very thin width (∼39 nm) via elimination of N 2 gas.…”