Thermal degradation behavior and kinetic properties of 1, 8-naphthalic anhydride loaded hybrid bimodal mesoporous silicas

Abstract

The novel luminescent hybrid bimodal mesoporous silicas (LHMS) with 1, 8-naphthalic anhydride (NA) as the fluorescence materials were synthesized through post-synthesis route and grafting method. The resulting materials were characterized by XRD, TEM, N2 adsorption–desorption isotherms and FT-IR. Particularly, thermal degradation behavior and kinetic properties of LHMS were investigated in detail by using thermogravimetric analyzer (TGA) at different heating rates in flowing N2 . TG experiments were performed to elucidate their thermal properties and the degradation behaviors. Meanwhile, using Kissinger and Flynn–Wall–Ozawa principles, the apparent activation energies were calculated and the thermal decomposition mechanism of the grafting process was put forward on the basis of the Coats-Redfern method.