Thermal decomposition of zinc-iron citrate precursor

Porous ZnAl2O4 synthesized by a modified citrate technique

“…So the particles are usually big in size and there are considerable agglomerates in the products. However, in our method the precursors formed by the modified citrate route decompose as carbon, some carbon monoxide, water and amorphous metal oxide [20], because the precursors heated in a nitrogen atmosphere. Due to the absence of O 2 , the carbon is not oxidized.…”

Characterization of the citrate precursor, used for synthesis of nanosized Mg-Zn ferrites

“…8). The first peak situated at 399.7 eV was attributed to existence of NH 3 and the second one situated at 401.5 eV was assigned to ammonium ion NH 4 + [26]. The Fe2p peak with the specific spin-orbit split in two components (2p3/2,1/2) is shown in Fig.…”

“…The citrate precursors are widely used to produce a number of multi-component, phase-homogeneous nanosized ferrites [2][3][4][5][6][7][8]. According to its creators, the technique comprises in the obtaining of amorphous mixture retaining all the necessary metallic ions and citric acid in pure homogeneity [2].…”

“…According to its creators, the technique comprises in the obtaining of amorphous mixture retaining all the necessary metallic ions and citric acid in pure homogeneity [2]. From previous research studies, the citrate precursors are presented by the formulas: Zn 3 [7]. The researchers in the next study described the citrate precursor for Ni 2 Fe 2 O 4 as a linear-type polymer [(C 6 H 6 O 7 ) 4 NiFe 2 ] n [7].…”

Influence of metal core of mixed‐metal carboxylates in preparation of spinel: ZnFe2O(O2CCF3)6 as a single‐source precursor for preparation of ZnFe2O4

“…3 -8 Several techniques have been employed previously for the preparation of various spinels. For instance zinc ferrite (franklinite), which has normal spinel structure, was prepared by combustion synthesis, 9 coprecipitation, 10 high-energy ball-milling, 11 thermal plasma synthesis, 12 hydrothermal method, 13 rapid quenching, 14 thermal decomposition of zinc-iron citrates 15 and spray pyrolysis of metal nitrate solutions. 16 The sol-gel approach, which is an established technique for the preparation of high-purity binary oxides in the form of bulk and thin film, have been used extensively for the preparation of MgAl 2 O 4 and ZnAl 2 O 4 , CoAl 2 O 4 and NiAl 2 O 4 spinel, but the preparation of spinel where M is a transition metal by the sol-gel method from metal alkoxides is very limited due to difficulty in the synthesis and handling of transition metal alkoxides.…”