Defective structure of doped carbons obtained from preceramic polymers through Cl ₂ ‐ and NH ₃ ‐assisted thermolysis

The processing parameters such as the heat treatment temperature, type of preceramic precursor, and post-synthesis treatments are key factors for development different microstructures in polymer-derived ceramics. Moreover, doping with heteroatoms has increased ability ceramics to produce tunable nanostructures a controlled pore size distributions. A precursor containing P been prepared from commercial polysiloxane polymer phosphate alkoxide. It subjected thermal N2, NH3, Cl2 atmospheres order sequences create differentiated either ceramic matrix carbon phase. structural, textural, spectroscopic characterization revealed that atoms play role evolution microstructure during treatments. If chlorination is carried out before silicophosphate formed prevents nitrogen incorporation into free On contrary, if NH3 chlorination, phase predominantly modified by within network.