Synthesis, structural characterization and thermal analysis of the cobalt(II) oxalate obtained through the reaction of 1,2-ethanediol with Co(NO3)2 · 6H2O

Bîrzescu, M.; Niculescu, Mircea; Dumitru, Raluca; Carp, Oana; Segal, E.

doi:10.1007/s10973-009-0054-z

Cited by 22 publications

(10 citation statements)

References 31 publications

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“…This assumption is supported by the existence of the fourth decomposition stage (406-450 • C). In this decomposition process, the continuous mass loss assigned to oxygen evolving is in agreement with the data from literature [35,37], and represents the formation of Cr 2 O 3 followed by obtaining the zinc chromite. Based on TG, DTG and DSC curves analysis, the thermal decomposition of [Cr2Zn(C2O4)4(OH2)6]·4H2O in air atmosphere can be represented by the following sequence:…”

Section: Synthesis and Characterization Of The Cr 3+ -Zn 2+ Coordinatsupporting

confidence: 88%

“…The strong band at 1719 cm −1 , assigned to the ν asym(O=C-O) vibration, as well as the band at 1268 cm −1 attributed to ν sym(O=C-O) , confirms that the ligand acts as a tetradentate [34,35].…”

Section: Synthesis and Characterization Of The Cr 3+ -Zn 2+ Coordinatmentioning

confidence: 75%

“…The broad and intense band with the maximum at 3565 cm −1 assigned to vibration ν (OH) confirms the presence of water in the Cr(III)-Zn(II) oxalate [34][35][36].…”

Section: Synthesis and Characterization Of The Cr 3+ -Zn 2+ Coordinatmentioning

confidence: 98%

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Synthesis, Characterization of Nanosized ZnCr2O4 and Its Photocatalytic Performance in the Degradation of Humic Acid from Drinking Water

et al. 2018

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Zinc chromite (ZnCr 2 O 4 ) has been synthesized by the thermolysis of a new Zn(II)-Cr(III) oxalate coordination compound, namely [Cr 2 Zn(C 2 O 4 ) 4 (OH 2 ) 6 ]·4H 2 O. The coordination compound has been characterized by chemical analysis, infrared spectroscopy (IR), and thermal analysis. The zinc chromite obtained after a heating treatment of the coordination compound at 450 • C for 1 h has been investigated by XRD, FE-SEM, TEM/HR-TEM coupled with selected area electron diffraction (SAED) measurements. The photocatalytic performance of nanosized zinc chromite was assessed for the degradation and mineralization of humic acid (HA) from a drinking water source, envisaging the development of the advanced oxidation process for drinking water treatment technology. A mineralization efficiency of 60% was achieved after 180 min of 50 mg L −1 HA photocatalysis using zinc chromite under UV irradiation, in comparison with 7% efficiency reached by photolysis.

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Section: Synthesis and Characterization Of The Cr 3+ -Zn 2+ Coordinatsupporting

confidence: 88%

Section: Synthesis and Characterization Of The Cr 3+ -Zn 2+ Coordinatmentioning

confidence: 75%

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Synthesis, Characterization of Nanosized ZnCr2O4 and Its Photocatalytic Performance in the Degradation of Humic Acid from Drinking Water

et al. 2018

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“…The IR spectrum of oxalate precursor (Figure 1a) reveals the presence of water [3410 cm −1 (ν OH , ν H2O ), 794 cm −1 (lattice water)] [41,54], oxalate anions [as bidentate ligand: 1642 cm −1 (ν asym (O=C-O) ) + δ sym (HOH), 1308 cm −1 (ν sym (O=C-O) , 1051 cm −1 (ν (C-O) )] [42]; as tetradentate ligand: 1445 cm −1 (ν sym (OCO) ), 915 cm −1 (δ (OCO) )] [55], and metal-oxygen linkages [600-400 cm −1 : ν (La-O) and ν (Fe-O) vibrations]. The IR spectra of LaFeO 3 obtained after calcination at 550 • C (Figure 1b) and 700 • C (Figure 1c) exhibit only the bands characteristic for vibrations ν(La-O) and ν(Fe-O) in the range of 600-400 cm −1 [43,44].…”

Section: Characterization Of Lafementioning

confidence: 99%

Lanthanum Ferrite Ceramic Powders: Synthesis, Characterization and Electrochemical Detection Application

et al. 2020

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The perovskite-type lanthanum ferrite, LaFeO3, has been prepared by thermal decomposition of in situ obtained lanthanum ferrioxalate compound precursor, LaFe(C2O4)3·3H2O. The oxalate precursor was synthesized through the redox reaction between 1,2-ethanediol and nitrate ion and characterized by chemical analysis, infrared spectroscopy, and thermal analysis. LaFeO3 obtained after the calcination of the precursor for at least 550–800 °C/1 h have been investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). A boron-doped diamond electrode (BDD) modified with LaFeO3 ceramic powders at 550 °C (LaFeO3/BDD) by simple immersion was characterized by cyclic voltammetry and tested for the voltammetric and amperometric detection of capecitabine (CCB), which is a cytostatic drug considered as an emerging pollutant in water. The modified electrode exhibited a complex electrochemical behaviour by several redox systems in direct relation to the electrode potential range. The results obtained by cyclic voltammetry (CV), differential-pulsed voltammetry (DPV), and multiple-pulsed amperometry proved the electrocatalytic effect to capecitabine oxidation and reduction and allowed its electrochemical detection in alkaline aqueous solution.

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“…Anhydrous alkali metal oxalates M 2 C 2 O 4 form an interesting group of compounds with very similar layered crystal structures and well-defined oxalate anions as an independent entity surrounded by metallic cations, decomposing thermally-unlike transition metal oxalates-via two step process with respective carbonate as transition product [1][2][3][4][5][6][7][8][9][10][11][12]:…”

Section: Introductionmentioning

confidence: 99%

Theoretical studies of electronic structure and structural properties of anhydrous alkali metal oxalates

Koleżyński

Małecki

2013

J Therm Anal Calorim

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The results of first principles calculations of band structure, density of states, and electron density topology of alkali metal oxalates are presented. The calculations have been carried out with WIEN2k ab initio program, using highly precise full potential linearized augmented plane wave method within density functional theory formalism. Calculated total electron density has been used in calculations of its topological properties (according to Bader's quantum theory of atoms in molecules formalism) and Cioslowski and Mixon's topological bond orders. The obtained results show important similarities between electronic structure and electron density topology for all analyzed structures with electronic structure close to Fermi energy typical for ionic compounds and bonding which is mainly covalent within the oxalate anion (with partly ionic character of carbon-oxygen bonds) and strongly ionic between oxalate anion and cationic sublattice. These results have been used as a basis for theoretical analysis of thermal decomposition process described in detail in part II of this paper (where also the results of additional calculations of atomic and bond valences, bond strengths and strains are presented).

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Synthesis, structural characterization and thermal analysis of the cobalt(II) oxalate obtained through the reaction of 1,2-ethanediol with Co(NO3)2 · 6H2O

Cited by 22 publications

References 31 publications

Synthesis, Characterization of Nanosized ZnCr2O4 and Its Photocatalytic Performance in the Degradation of Humic Acid from Drinking Water

Synthesis, Characterization of Nanosized ZnCr2O4 and Its Photocatalytic Performance in the Degradation of Humic Acid from Drinking Water

Lanthanum Ferrite Ceramic Powders: Synthesis, Characterization and Electrochemical Detection Application

Theoretical studies of electronic structure and structural properties of anhydrous alkali metal oxalates

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