“…It requires sustainable development of energy-efficient materials, catalysts, and processes, following microwave (MW) and ultrasound technologies (UT), avoiding the use of volatile organic solvents. 3,4 Similar to microwave reactions, UT is becoming promising as a green technique for selective depolymerisation of cellulose and hemicelluloses through its special cavitation effects. 5 MW and UT both exhibit less reaction time and require less solvent and catalyst.…”