Low temperature synthesis of nanosize rutile titania crystal in liquid media
Low temperature synthesis of nanosize rutile titania crystal in liquid media
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DOI：
10.1016/s0254-0584(02)00034-2
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发表时间：
2002-04
影响因子：
4.6
通讯作者：
S. Yin;Ruixing Li;Qinglin He;Tsugio Sato
中科院分区：
文献类型：
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作者：
S. Yin;Ruixing Li;Qinglin He;Tsugio Sato
采用低温溶解-再沉淀法（LTDRP）在液体介质中制备了晶化良好的纳米金红石相（约20 ~ 50nm）二氧化钛粉体。非晶前驱体的结晶是在室温左右的低温下进行的。结晶温度比空气焙烧（407℃）和水热反应（130℃）分别低385℃和110℃左右。采用XRD和拉曼分析对LTDRP粉末的物相组成进行了表征。LTDRP法制备的二氧化钛粉体具有135.0m2g−1的高比表面积，比水热法制备的二氧化钛粉体大2倍左右。二氧化钛的相组成、微观结构、形貌、结块状态和比表面积随溶液中pH值、溶剂类型和共存离子等因素的不同而发生显著变化。对结晶二氧化钛的光催化活性进行了表征。
Titania powders consisting of well-crystallized nanosize rutile phase (ca. 20–50nm) were prepared by the “low temperature dissolution–reprecipitation process” (LTDRP) in liquid media. The crystallization of amorphous precursor was carried out at a low temperature around room temperature. The crystallization temperature was about 385 and 110°C lower than those by calcination in air (407°C) and hydrothermal reaction (130°C), respectively. The phase constitution of powders from LTDRP was identified by XRD and Raman analyses. The titania powders prepared by LTDRP possessed a high specific surface area of 135.0m2g−1, which was about two times greater than that prepared by hydrothermal method. The phase composition, microstructure, morphology, agglomerate state and specific surface area of titania changed significantly, depending on the pH value, type of solvent and coexisting ion, etc. in the solution. The photocatalytic activity of crystalline titania was characterized.