{"title":"Preparation and characterization of nanosized TiO2 powders from aqueous TiCl4 solution","authors":"Q.-H. Zhang , L. Gao , J.-K Guo","doi":"10.1016/S0965-9773(99)00421-3","DOIUrl":null,"url":null,"abstract":"<div><p>A solution-based processing method has been used to synthesize nanocrystalline TiO<sub>2</sub> powders by controlling the hydrolysis of TiCl<sub>4</sub><span> in aqueous solution. As-prepared powder was characterized by TEM<span>, HREM, XRD, BET and ED techniques. In the presence of a small amount sulphate ions, the powder was pure anatase and its primary particle size is finer than that of alkoxide-derived powder, moreover the transformation of anatase to rutile was retarded. Both hydrolysis temperature and amount of sulfate ions had effects on the morphology and crystallization of the powder. In an optimum process, TiO</span></span><sub>2</sub><span> powder in the anatase phase was fabricated without calcination and its primary size was 4nm, BET surface area was 290m</span><sup>2</sup>/g.</p></div>","PeriodicalId":18878,"journal":{"name":"Nanostructured Materials","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1999-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0965-9773(99)00421-3","citationCount":"86","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nanostructured Materials","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0965977399004213","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 86
Abstract
A solution-based processing method has been used to synthesize nanocrystalline TiO2 powders by controlling the hydrolysis of TiCl4 in aqueous solution. As-prepared powder was characterized by TEM, HREM, XRD, BET and ED techniques. In the presence of a small amount sulphate ions, the powder was pure anatase and its primary particle size is finer than that of alkoxide-derived powder, moreover the transformation of anatase to rutile was retarded. Both hydrolysis temperature and amount of sulfate ions had effects on the morphology and crystallization of the powder. In an optimum process, TiO2 powder in the anatase phase was fabricated without calcination and its primary size was 4nm, BET surface area was 290m2/g.
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