The journal Applied Catalysis A, General features a study by Deyler Castilla-Caballero et al. on the innovative use of TiO2​/biochar composites for degrading polypropylene (PP) films, a significant step toward reducing plastic pollution. The research explores the application of solid-state photocatalysis, employing environmentally friendly materials to tackle the pervasive issue of plastic waste.  

The study highlights the potential of biocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More, derived from coconut shells through controlled pyrolysisPyrolysis is a thermochemical process that converts waste biomass into bio-char, bio-oil, and pyro-gas. It offers significant advantages in waste valorization, turning low-value materials into economically valuable resources. Its versatility allows for tailored products based on operational conditions, presenting itself as a cost-effective and efficient More, to enhance photocatalytic activity when combined with TiO2​. A 416B-type Central-Hybrid Experimental Design was used to optimize the synthesis parameters, revealing that biochar produced under specific conditions (280°C, 4.1% v/v oxygen, and a TiO2​/biochar weight ratio of 1.5) yields optimal results. After 25 days of UV irradiation, the TiO2​/biochar composites demonstrated an 8.7% weight loss and a carbonyl index of 11.4 in the treated PP films, significantly outperforming pristine PP films.  

This research not only introduces a sustainable approach to polymer degradation but also contributes to the development of eco-friendly materials aimed at mitigating plastic waste challenges. The adverse environmental effects of plastic waste are evident, with significant amounts ending up in landfills or polluting soils and oceans. This study offers a promising avenue for addressing this critical environmental issue.  

SOURCE: Castilla-Caballero, D., Medina-Guerrero, A., Hernandez-Ramirez, A., Vazquez-Rodriguez, S., Colina-Marquez, J., Machuca Martinez, F., Barraza-Burgos, J., Roa-Espinosa, A., Gunasekaran, S. (2025). Use of a 416B-type central-hybrid experimental design to evaluate the synthesis conditions of TiO2​/biochar composites on the solid-state photocatalytic degradation of polypropylene-plastic films. Applied Catalysis A, General, 697, 120196.