Thermal decomposition kinetics of potassium iodate

Muraleedharan, K.

doi:10.1007/s10973-011-1711-6

Cited by 7 publications

(1 citation statement)

References 30 publications

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“…There are some nice examples of the effect of these reactant intrinsic properties (mainly size and morphology) on the reaction kinetics including thermal decomposition of nitrocellulose 11 or potassium iodate. 12 Despite of well expectable effect of size and morphology on the reaction kinetics, to date, evidences of the connection between the intrinsic properties of the reactants and reaction mechanism leading to different products were obtained mainly indirectly, from analyses of different physicochemical properties of the products. It is also due to experimental difficulties in controlling the effects of particular variables because of the overlap of all these effects.…”

Section: Introductionmentioning

confidence: 99%

Thermal decomposition of Prussian Blue microcrystals and nanocrystals – iron(iii) oxide polymorphism control through reactant particle size

et al. 2013

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We present the first direct evidence that reactant particle size determines the mechanism of thermally induced solid-state reactions and can be used as the tuner of the product crystal structure. This control of the polymorphous character of the products through the particle size of precursor is demonstrated upon following the process of isothermal decomposition of Prussian Blue at 350 uC in air. The reaction mechanism was studied by 57 Fe Mo ¨ssbauer spectroscopy, X-ray powder diffraction, magnetization measurements, and transmission and scanning electron microscopy. The decomposition of Prussian Blue nanoparticles (10-15 nm) gave preferential formation of c-Fe 2 O 3 nanoparticles (10-20 nm), while Prussian Blue microcrystals (20-50 mm) afforded formation of b-Fe 2 O 3 nanoparticles (50-70 nm). The final polymorphous composition of the iron(III) oxide product is thought to be driven by the different diffusion conditions for penetration of the reaction gas (oxygen) into the Prussian Blue crystals as well as release of the gas (dicyane) during the Prussian Blue decomposition. Therefore, the reactant particle size control provides a new method for the large-scale preparation of rare b-Fe 2 O 3 nanoparticles.

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Section: Introductionmentioning

confidence: 99%