Characterization of colloidal chromia particles obtained by forced hydrolysis
Abstract
Colloidal particles of chromia have been prepared by forced hydrolysis of an aqueous solution containing chromium chloride hexahydrate. At elevated temperature, a controlled addition of potassium hydroxide yielded colloidal chromia particles. After the sol coagulation, amorphous dried residues (I) were converted to crystalline form (II) by heating at 1073 K. The thermal treatment was also accompanied by a reduction in both surface area (from 75 to 9 m(2)/g) and point of zero charge (pH(pzc); from 4.7 to 4.0). Chromia dissolution over the studied pH range (pH = 2-12) exhibits a parabolic trend, with minimum solubility at pH(pzc). (C) 2003 Elsevier Ltd. All rights reserved.
Keywords:
oxides / sol-gel chemistry / surface propertiesSource:
Materials Research Bulletin, 2003, 38, 8, 1329-1339
DOI: 10.1016/S0025-5408(03)00137-5
ISSN: 0025-5408
WoS: 000185126400006
Scopus: 2-s2.0-0042934214
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Institution/Community
VinčaTY - JOUR AU - Onjia, Antonije E. AU - Milonjić, Slobodan K. AU - Čokeša, Đuro AU - Čomor, Mirjana AU - Miljević, Nada R. PY - 2003 UR - https://vinar.vin.bg.ac.rs/handle/123456789/2660 AB - Colloidal particles of chromia have been prepared by forced hydrolysis of an aqueous solution containing chromium chloride hexahydrate. At elevated temperature, a controlled addition of potassium hydroxide yielded colloidal chromia particles. After the sol coagulation, amorphous dried residues (I) were converted to crystalline form (II) by heating at 1073 K. The thermal treatment was also accompanied by a reduction in both surface area (from 75 to 9 m(2)/g) and point of zero charge (pH(pzc); from 4.7 to 4.0). Chromia dissolution over the studied pH range (pH = 2-12) exhibits a parabolic trend, with minimum solubility at pH(pzc). (C) 2003 Elsevier Ltd. All rights reserved. T2 - Materials Research Bulletin T1 - Characterization of colloidal chromia particles obtained by forced hydrolysis VL - 38 IS - 8 SP - 1329 EP - 1339 DO - 10.1016/S0025-5408(03)00137-5 ER -
@article{ author = "Onjia, Antonije E. and Milonjić, Slobodan K. and Čokeša, Đuro and Čomor, Mirjana and Miljević, Nada R.", year = "2003", abstract = "Colloidal particles of chromia have been prepared by forced hydrolysis of an aqueous solution containing chromium chloride hexahydrate. At elevated temperature, a controlled addition of potassium hydroxide yielded colloidal chromia particles. After the sol coagulation, amorphous dried residues (I) were converted to crystalline form (II) by heating at 1073 K. The thermal treatment was also accompanied by a reduction in both surface area (from 75 to 9 m(2)/g) and point of zero charge (pH(pzc); from 4.7 to 4.0). Chromia dissolution over the studied pH range (pH = 2-12) exhibits a parabolic trend, with minimum solubility at pH(pzc). (C) 2003 Elsevier Ltd. All rights reserved.", journal = "Materials Research Bulletin", title = "Characterization of colloidal chromia particles obtained by forced hydrolysis", volume = "38", number = "8", pages = "1329-1339", doi = "10.1016/S0025-5408(03)00137-5" }
Onjia, A. E., Milonjić, S. K., Čokeša, Đ., Čomor, M.,& Miljević, N. R.. (2003). Characterization of colloidal chromia particles obtained by forced hydrolysis. in Materials Research Bulletin, 38(8), 1329-1339. https://doi.org/10.1016/S0025-5408(03)00137-5
Onjia AE, Milonjić SK, Čokeša Đ, Čomor M, Miljević NR. Characterization of colloidal chromia particles obtained by forced hydrolysis. in Materials Research Bulletin. 2003;38(8):1329-1339. doi:10.1016/S0025-5408(03)00137-5 .
Onjia, Antonije E., Milonjić, Slobodan K., Čokeša, Đuro, Čomor, Mirjana, Miljević, Nada R., "Characterization of colloidal chromia particles obtained by forced hydrolysis" in Materials Research Bulletin, 38, no. 8 (2003):1329-1339, https://doi.org/10.1016/S0025-5408(03)00137-5 . .