The rising levels of pharmaceuticals like acetaminophen (ACT) in water bodies threaten ecosystems and human health. This study explores a sustainable and efficient solution using orange peel waste-derived biochar to enhance the photocatalytic degradation of ACT.

Turning Trash into Treasure: By integrating biochar from orange peels with titanium dioxide (TiO2), we created a powerful composite (TOBC) using an ultrasound-assisted technique. Optimizing the process parameters with statistical tools led to the development of TOBC20, boasting a remarkable 94% ACT degradation efficiency.

Unveiling the Magic: We delved deep into the material’s properties, revealing how biochar acts as an electron acceptor and facilitator for charge separation, boosting the photocatalytic activity of TiO2. Through trapping experiments and electron spin resonance techniques, the degradation mechanism was elucidated, showcasing the crucial role of generated radicals in breaking down ACT.

Sustainable and Stable: Not only is TOBC20 effective, but it also demonstrates excellent stability over multiple cycles, confirming its potential for real-world applications. Our findings align with previous research, solidifying the promise of this eco-friendly technology for water purification.

This study paves the way for transforming waste into a valuable resource for environmental remediation. By harnessing the power of biochar and photocatalysis, we can create a cleaner and healthier future for our planet and ourselves.