“…However, it is very sluggish in the absence of a catalyst. Traditionally, the glycolysis of PET was carried out in the presence of metal acetates [6,7], titanium-phosphate [8], solid superacids [9], metal oxides such as NiO, Fe 2 O 3 or TiO 2 [10], etc. However, these catalysts are toxic and/or corrosive and/or resulting in severe pollution.…”