2.4. Thermogravimetric Analysis (TGA)

TGA analysis was performed on a Pyris 1 TGA (Perkin-Elmer, Akron, OH, USA) thermal analyzer. In a typical temperature scan experiment, 10 mg of sample were heated from ambient temperature to 600 °C at a heating rate of 20 °C min⁻¹ under nitrogen flow. For the isothermal experiments, 20 mg samples were weighted and gently compressed into a bed (not firmly packed) inside the TGA pan sample holder. The samples were rapidly heated to the desired temperature and remained for 20 min at this temperature. The quantification of the different mass loss steps was performed by Gaussian peak fitting of the first derivative plot, as derived from the obtained thermograms.