材料科学
热液循环
金红石
锐钛矿
化学工程
烧结
纳米颗粒
表征(材料科学)
硝酸
水热合成
相(物质)
纳米技术
矿物学
冶金
光催化
催化作用
有机化学
化学
工程类
作者
Hsiao–Yen Lee,Girish M. Kale
标识
DOI:10.1111/j.1744-7402.2008.02248.x
摘要
Nanopowders of phase pure TiO 2 (rutile) have been synthesized by hydrothermal method using dilute nitric acid as a peptizer. The nanoparticles exhibited bimodal morphological features. The sintering behavior of these nanoparticles have been investigated and compared with the commercially obtained mixed phase (86% anatase+14% rutile) nanopowders of TiO 2 . The hydrothermally synthesized nanopowders were found to sinter to nearly 90% of the theoretical density at approximately 850°C and still maintain nanostructured grains. This is important for the application of these materials for gas sensors, disinfectants, and as photocatalysts. The nanopowders of TiO 2 synthesized by hydrothermal method have superior physical and microstructural features compared with commercial nanopowders. It is possible to scale up the process with relative ease and at much lower capital cost.
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