Preparation of microporous pillared carbons from the silylated graphite oxide prepared by a two-step method

Microporous pillared carbons were prepared from graphite oxide silylated by a two-step method. Graphite oxide was first silylated with octyltrichlorosilane and then, with 3-aminopropyltriethoxysilane at 110 °C. The addition of excess silylating reagents in the second step reaction led to the decrease in the interlayer spacings of the resulting silylated graphite oxides. Pillared carbon with interlayer spacing of 1.58 nm was formed when the silylated graphite oxides with the layer spacing of 2.63 nm were heated at 500 °C under vacuum. The BET surface area of the pillared carbon reached a relatively large value of 756 m2/g and αs analysis indicated that the pore width was 0.74 nm.

► Pillared carbon was obtained from silylated graphite oxide prepared by a two-step method. ► Obtained pillared carbon was microporous and the calculated pore width was 0.74 nm. ► BET surface area of pillared carbon reached 756 m2/g.