Effect of the reaction time on the microstructure and porous texture of carbon materials obtained by chlorination of Ti(C₅H₅)Cl₂

Carbon materials have been obtained by the chlorination reaction of Ti(C₅H₅)Cl₂ at 900 °C, varying the reaction time at 30, 60, 90 and 120 min. The average microstructure, studied by X ray powder diffraction, suggest that these materials consist mainly of disordered carbon with low graphitization degree (from 13.5 to 16.5%). These results are in agreement with the Raman data since the D band (at ≈ 1350 cm⁻¹) indicates that disordered carbon networks have appeared. The calculated in-plane correlation length increases from 4.04 to 4.70 nm as the chlorination time increases from 30 to 120 min. The textural analyses reveal adsorption isotherms type 1 with hysteresis H4, microporous areas as high as 855 m²/g and pore volume of 0.55 cm³/g. Additionally, an important contribution of mesoporosity, around 3.6 nm, was also detected. - Highlights: • Micro-mesoporous carbon materials were obtained by chlorination of Ti(C₅H₅)₂Cl₂ at 900 °C. • The effect of chlorination exposure time on the microstructure and textural properties was studied. • Microstructural analysis by XRD and Raman showed that carbon samples are mainly disordered. • N₂ adsorption/desorption isotherms showed isotherms type 1 with hysteresis H4. • Micropore size increases at longer chlorination time; in contrast, pore volume decreases.