prikaz prve stranice dokumenta Formation of Chromia from Amorphous Chromium Hydroxide
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Scientific paper - Original scientific paper
Formation of Chromia from Amorphous Chromium Hydroxide
Croatica Chemica Acta, 72 (1999), 4; 789-802. urn:nbn:hr:217:029045
Musić, Svetozar; Maljković, Miroslava; Popović, Stanko; Trojko, Rudolf

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Musić, S., Maljković, M., Popović, S. & Trojko, R. (1999). Formation of Chromia from Amorphous Chromium Hydroxide. Croatica Chemica Acta, 72. (4), 789-802. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:029045

Musić, Svetozar, et al. "Formation of Chromia from Amorphous Chromium Hydroxide." Croatica Chemica Acta, vol. 72, no. 4, 1999, pp. 789-802. https://urn.nsk.hr/urn:nbn:hr:217:029045

Musić, Svetozar, Miroslava Maljković, Stanko Popović and Rudolf Trojko. "Formation of Chromia from Amorphous Chromium Hydroxide." Croatica Chemica Acta 72, no. 4 (1999): 789-802. https://urn.nsk.hr/urn:nbn:hr:217:029045

Musić, S., et al. (1999) 'Formation of Chromia from Amorphous Chromium Hydroxide', Croatica Chemica Acta, 72(4), pp. 789-802. Available at: https://urn.nsk.hr/urn:nbn:hr:217:029045 (Accessed 02 December 2024)

Musić S, Maljković M, Popović S, Trojko R. Formation of Chromia from Amorphous Chromium Hydroxide. Croatica Chemica Acta [Internet]. 1999 [cited 2024 December 02];72(4):789-802. Available at: https://urn.nsk.hr/urn:nbn:hr:217:029045

S. Musić, M. Maljković, S. Popović and R. Trojko, "Formation of Chromia from Amorphous Chromium Hydroxide", Croatica Chemica Acta, vol. 72, no. 4, pp. 789-802, 1999. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:217:029045. [Accessed: 02 December 2024]

Metadata
Title (english)Formation of Chromia from Amorphous Chromium Hydroxide
AuthorSvetozar Musić
AuthorMiroslava Maljković
AuthorStanko Popović
AuthorRudolf Trojko
Author's institutionUniversity of Zagreb
Faculty of Science
(Department of Physics)
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Abstract (english)
Forced hydrolysis of Cr(NO3)3 in a solution of decomposing ureawas investigated. Chromium hydroxide precipitates were amorphousfor the final pH values up to 9 to 9.5. Heating of amorphouschromium hydroxide up to 360 °C produced Cr2O3 crystallites ofthe order of 20 nm, whereas after heating up to 825 °C the crystallitesize of Cr2O3 increased to the order of 100 nm. Crystallizationof Cr2O3 was also monitored by FT-IR spectroscopy. TGA/DTA curves,recorded in air, showed thermal behavior of amorphous chromiumhydroxides that differed depending on the experimental conditionsof their preparation. A sharp exothermic peak between 410and 420 °C was recorded due to the crystallization of Cr2O3. Thispeak shifted to 600 °C when the heating of amorphous chromiumhydroxide was performed in an argon atmosphere. Accelerated crystallizationof Cr2O3 from amorphous chromium hydroxide in air isexplained by the catalytic effect of the higher oxidation states ofchromium species, which were probably restricted to the surface ofthe particles. It is suggested that higher oxidation states of chromiumwere not stable and they converted to the initial Cr(III)state. XRD did not detect any oxide phase of chromium except forCr2O3.
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Journal titleCroatica Chemica Acta
Numberingvol. 72, no. 4, pp. 789-802
p-ISSN0011-1643
e-ISSN1334-417X
URN:NBNurn:nbn:hr:217:029045
Publication1999
Document URLhttps://hrcak.srce.hr/132299
Type of resourceText
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2019-10-08 09:51:38