Simplified chemical route for the synthesis of barium titanyl oxalate (BTO)

A simple chemical route for the synthesis of γ-Fe2O3 nano-particles dispersed in organic solvents via an iron–hydroxy oleate precursor

“…The third step involves complete loss of oleate molecules with a broader exothermic peak suggesting that the decarboxylation proceeds through formation of iron oxide phase at 360 8C with a continuous weight loss in the TGA curve. The fourth exothermic step at temperature $417 8C is ascribed to exothermic oxidation of CO to CO 2 formed during decomposition of oleate groups at the surface of particle [23] with little loss in weight. The last endothermic loss above 500 8C may be related to removal of residual bulk hydroxyl OH À species from the precursor.…”

Deposition of thin TiO2 layers on platinum by means of cyclic voltammetry of selected complex Ti(IV) media leading to anatase

“…The NH 4 + bands (3200, 1680, 1400 cm −1 [46]) partially overlap with the bands characteristic for oxalate. Our result is in agreement with that reported in [39], although the expected final product was hydrated TiO 2 as reported in [23,24].…”

Formation mechanism of barium titanate by thermal decomposition of barium titanyl oxalate

“…According to the GC/MS spectra shown in Fig. 3, significant amount of O 2 was evolved at 357 and 720 8C, which is opposed to the general belief so far that CO, CO 2 and H 2 O are the only gaseous products of BTO decomposition [3,6,7,9,10,[13][14][15][16].…”

“…(1): [2][3][4][5][6]. An example is the appearance of BaCO 3 and TiO 2 as intermediate phases, where some researchers proposed the formation of these as intermediate phases [2,4,6,[7][8][9][10][11][12][13], while others denied [1,3,[14][15][16]. Although there are some reports on the decomposition mechanism of BTO [3,6,7,9,10,[13][14][15][16], the model proposed by Gopalakrishnamurthy et al in 1975 is generally accepted [3], which can be divided into the following 5 steps:…”