Sonophotocatalysis has gained attention recently for the effective treatment of wastewater, mainly based on the expected synergy from sonication and photocatalysis. The current work focuses on the guidelines related to the mechanisms for synergy, optimization of operating parameters, and reactor designs. The influence of operational parameters, including pH (acidic or alkaline conditions), pollutant concentration, catalyst loading, temperature, and irradiation duration, on degradation extent has been explained. In addition, the effect of reactor characteristics such as ultrasonic frequency and power has been discussed. A significantly higher synergistic pollutant removal has indeed been observed in sonophotocatalysis compared to conventional treatment methods. The incorporation of various doping materials and catalyst supports further enhances degradation efficiency. The expected advancement underscores the potential of sonophotocatalysis as a promising wastewater treatment technology, particularly for the effective elimination of recalcitrant organic contaminants. The review also presents the challenges of the current process and offers recommendations for its future expansion.
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