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Cadmium ions and cadmium sulphide particles in γ-titanium dihydrogen phosphate. Synthesis, thermal behaviour and X-ray characterization

100%

Ferragina C., Rocco R., Patrono P., Petrilli L.

Open Chemistry

2009

vol. 7

issue 1

31-34

Layered compounds with CdS particles supported on the ion-exchanger, γ-titanium dihydrogen phosphate, were prepared by the stepwise reaction of the ion-exchanger and cadmium solution, followed by reaction with H2S gas. The CdS content on the ion-exchanger is dependent on the timeframe of the H2S gas flow. The materials obtained were layered, as shown by the X-ray measurements that exhibit both precursor and CdS diffraction peaks. The thermal treatment of the material obtained gives evidence of its stability (≤ 320°C) before the CdS decomposition, which occurs in a single step. [...]

Physicochemical characteristics of 2-, 3- and 4-methylpyridinium tetrachloroferrates(III)

100%

Wyrzykowski D., Wera M., Sikorski A., Jacewicz D., Chmurzyński L.

Open Chemistry

2011

vol. 9

issue 6

1096-1101

The crystal structure of 2-methylpyridinium tetrachloroferrate(III) was determined. The iron cation is tetracoordinated by chloride anions, and it adopts a slightly distorted tetrahedral coordination with three angles smaller, two almost equal and one larger than the tetrahedral. The compound is isostructural with its 3-, and 4-methylpyridinium analogues. The thermal properties of 2-, 3- and 4-methylpyridinium tetrachloroferrates(III) have been studied using TG and DSC techniques. The compounds exhibit a high stability in the melt. [...]

Facile preparation of graphite intercalation compounds in alkali solution

88%

Li J., Shi H., Li N., Li M., Li J.

Open Chemistry

2010

vol. 8

issue 4

783-788

Graphite intercalation compounds are often prepared by flake graphite, oxidants, inorganic acids, organic acids and intercalated ions which are usually hydrogen protons between the graphene planes. They are also known as the acid-treated graphite intercalation compounds. In this work, alkaline graphite intercalation compounds were prepared by flake graphite, K2Cr2O7, concentrated H2SO4 and NaOH, and the morphology and structure were characterized by Electron microscopy and X-ray techniques. The results display that the combination of neutralisation heat and oxidation capability produced by K2Cr2O7 can break the bonds to produce the spaces between the graphene planes and hydroxyl ions also intercalate into the graphene planes to form alkaline graphite intercalation compounds in alkali solution. The morphology and structure of alkaline graphite intercalation compounds are analogous to the ones of the acid-treated graphite intercalation compounds, but the intercalated ions and the expansion volume are different. The results show that the method is an innovation.

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3 Open Chemistry

1 2011

1 2010

1 2009

1 Chmurzyński L.

1 Ferragina C.

1 Jacewicz D.

1 Li J.

1 Li M.

1 Li N.

1 Patrono P.

1 Petrilli L.

1 Rocco R.

1 Shi H.

1 Sikorski A.

1 Wera M.

1 Wyrzykowski D.

Search results

Cadmium ions and cadmium sulphide particles in γ-titanium dihydrogen phosphate. Synthesis, thermal behaviour and X-ray characterization

Physicochemical characteristics of 2-, 3- and 4-methylpyridinium tetrachloroferrates(III)

Facile preparation of graphite intercalation compounds in alkali solution