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Hydrothermal synthesis is normally conducted in steel pressure vessels called autoclaves with or without Teflon liners under controlled temperature and/or pressure with the reaction in aqueous solutions¡£
For example, TiO2 nanoparticles can be obtained by hydrothermal treatment of peptized precipitates of a titanium precursor with water¡£
The precipitates were prepared by adding a 0.5 M isopropanol solution of titanium butoxide into deionized water ([H2O]/ [Ti] =150), and then they were peptized at 70 ¡ãC for 1 h in the presence of tetraalkylammonium hydroxides (peptizer).
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