Precursor Chemistry of Iron Nitrate Solution for Spray Flame Synthesis

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Iron (III) nitrate solution is used in a variety of applications, including electronics, metalwork, and chemical synthesis. It is a clear, reddish-brown liquid.

Precursor Chemistry of Metal-Organic Solutions for Spray Flame Synthesis

Understanding the precursor chemistry of iron-based metal-organic solutions is a key step in the development of gas-phase synthesized, nano-sized iron oxide particles. To this end, systematic investigations of the precursor chemistry of iron-based systems are necessary.

Optical Phase Characterization of Li4Ti5O12 Particles from Different Precursor/Solvent Combinations

The crystalline phases of FSP-synthesised iron oxide particles are highly variable and depend on the liquid feed rate, precursor concentration and oxygen flow rates. It is important to understand how the different parameters affect the phase of the produced particles.

In this study, we investigated the amorphous Ni-Fe hydroxide (a-NiFeOxHy) layer that forms in the transpassive potential region on nickel foam (NF) as a result of immersion in a Fe(NO3)3 solution. We evaluated the current density of the a-NiFeOxHy layer at a range of applied voltages and current densities.

Raman Microscopy and Rietveld Refinement Results

We measured the Raman scattering ratios of the different phases using a Raman microscope. The Raman scattering data complemented well with the results of Rietveld refinement and allowed for an excellent correlation between the morphology and the amorphous phase composition.

The results of this study show that the hematite fraction formed in a variety of precursor/solvent combinations and was only eliminated by adding carboxylic acid to the mixture. This may indicate that the hematite-phase formation process is dependent on a reducing environment in the flame, similar to what happens during thermal decomposition of PEG.