Abstract Poly(ethylene terephthalate) (PET) is one of the most consumed polymers because of its excellent thermal and mechanical properties. By increasing in PET production and since the disposal of PET waste has grown to be a major global environmental issue each year. Chemical recycling is the most successful method to achieve circular economy in the PET utilizing industries. Current research work aims to complete depolymerization of waste PET from soft drink bottles by the aminolysis method to produce bis (2-hydroxy ethylene) terephthalamide (BHETA) in the presence of Sn doped ZnO. To evaluate catalytic activity, Sn(II) doped ZnO nanoparticles prepared using different Sn(II) molar ratios at 0.5, 1.0 and 2.0?mol and calcined at 500?°C for 1?h. The synthesized catalysts characterised using FT-IR, XRD, and UV–vis spectroscopy. The surface morphology and percentage doping obtained from SEM and SEM–EDS, respectively. We have observed a reduction in optical band gap and crystallite size of ZnO due to tin doping. Aminolytic depolymerization of PET waste using ethanolamine was promoted by Sn doped ZnO effectively under conventional thermal method. Increase in the yield of the BHETA observed with respect to increased doping percentage of Sn, and 1, 2?mol Sn doped ZnO nanoparticles afforded over 90 of BHETA. Structure and purity of BHETA, depolymerised product was characterized by FT-IR, 1HNMR, 13C NMR, and MS.Graphical Abstract
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