Preparation and characterization of bentonite/PS-SO3H nanocomposites as an efficient acid catalyst for the Biginelli reaction

A bentonite/PS-SO3H nanocomposite was prepared and used as an acid catalyst for the Biginelli reaction under solvent-free conditions. This acid catalyst was characterized by XRD, SEM, TG, BET and FT-IR. The catalyst showed high thermal stability, good reusability and was environmentally benign.

► Bentonite/PS-SO3H nanocomposite was synthesized as a novel acidic catalyst.
► The catalytic activity of the nanocomposite was investigated for Biginelli reaction.
► This catalyst showed high thermal stability beside good reusability.