{"title":"超临界醇法制备纳米氧化铬粉体","authors":"L. Znaidi, C. Pommier","doi":"10.1016/S0992-4361(98)80019-2","DOIUrl":null,"url":null,"abstract":"<div><p>A new semi-continuous process has been developed for the synthesis of Cr<sub>2</sub>O<sub>3</sub> powders starting with Cr(III) acetylacetonate or acetate hydroxide dissolved in methanol. The precursor is first decomposed in the solvent under supercritical state (T = 325 to 450 °C, P = 10 MPa) and the formed solid is dried under either nitrogen or air flow. For various reaction temperatures and drying conditions, nanometric particles of pure amorphous or crystalline Cr<sub>2</sub>O<sub>3</sub> powders are obtained with surface area between 350 and 30 m<sup>2</sup>.g<sup>−1</sup> according to their crystallization state.</p></div>","PeriodicalId":100507,"journal":{"name":"European Journal of Solid State and Inorganic Chemistry","volume":"35 6","pages":"Pages 405-417"},"PeriodicalIF":0.0000,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0992-4361(98)80019-2","citationCount":"9","resultStr":"{\"title\":\"Synthesis of nanometric chromium (III) oxide powders in supercritical alcohol\",\"authors\":\"L. Znaidi, C. Pommier\",\"doi\":\"10.1016/S0992-4361(98)80019-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>A new semi-continuous process has been developed for the synthesis of Cr<sub>2</sub>O<sub>3</sub> powders starting with Cr(III) acetylacetonate or acetate hydroxide dissolved in methanol. The precursor is first decomposed in the solvent under supercritical state (T = 325 to 450 °C, P = 10 MPa) and the formed solid is dried under either nitrogen or air flow. For various reaction temperatures and drying conditions, nanometric particles of pure amorphous or crystalline Cr<sub>2</sub>O<sub>3</sub> powders are obtained with surface area between 350 and 30 m<sup>2</sup>.g<sup>−1</sup> according to their crystallization state.</p></div>\",\"PeriodicalId\":100507,\"journal\":{\"name\":\"European Journal of Solid State and Inorganic Chemistry\",\"volume\":\"35 6\",\"pages\":\"Pages 405-417\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1998-06-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/S0992-4361(98)80019-2\",\"citationCount\":\"9\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"European Journal of Solid State and Inorganic Chemistry\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0992436198800192\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"European Journal of Solid State and Inorganic Chemistry","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0992436198800192","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Synthesis of nanometric chromium (III) oxide powders in supercritical alcohol
A new semi-continuous process has been developed for the synthesis of Cr2O3 powders starting with Cr(III) acetylacetonate or acetate hydroxide dissolved in methanol. The precursor is first decomposed in the solvent under supercritical state (T = 325 to 450 °C, P = 10 MPa) and the formed solid is dried under either nitrogen or air flow. For various reaction temperatures and drying conditions, nanometric particles of pure amorphous or crystalline Cr2O3 powders are obtained with surface area between 350 and 30 m2.g−1 according to their crystallization state.
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