Highly recyclable and efficient piezocatalyst of Nafion decorated MoS2 with hierarchical structure for organic pollutants degradation

•Nf-MSCF exhibits a remarkable piezocatalysis efficiency of removing 98% of RhB in 4 min under ultrasound.•Nafion layer of Nf-MSCF greatly enhanced the structural stability under sonication.•Nafion layer of Nf-MSCF enhanced adsorption of cationic organic substrates.•The removal mechanism for RhB of Nf-MSCF was proposed.•The piezoelectric voltage was simulated by COMSOL Multiphysics and measured in the experiment.