Activated carbons containing TiO2: Characterization and influence of a preparation method on the state of TiO2 supported

In this study preparation procedure and characterization of coal-based acti vated carbons supporting TiO2 is presented. Decomposition of titanium organ ic complex introduced into three raw coals of a different composition is de scribed and illustrated by XRD patterns taken at different stages of the pr eparations. Influence of a coal rank and titanium supported on coals on the development of a mesoporous structure is shown. Titanium revealed a positi ve influence on the formation of mesopores in activated carbons. Titanium c ontents were higher in those carbons activated for a longer time. Loss of s ome part of Ti supported was observed during preparation and the loss remai ned in a straight relation with the activation time. As confirmed by TEM, s ize of TiO2 particles supported on the activated carbons increased with the activation time. Distribution of the particles was irregular. Rutile was t he only crystalline form of TiO2 found in Ti-loaded activated carbons. (C) 2001 Kluwer Academic Publishers.