In a recent study published in Scientific Reports, Ahmed F. Ghanem and colleagues detailed the synthesis and application of a novel nanocomposite for water treatment. The core of this innovation lies in the modification of titanium dioxide nanowires (TNWs) with 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 nanorods, incorporated into a polyvinyl alcohol (PVA) film.  

The researchers synthesized titanium dioxide nanowires using a hydrothermal method and modified them with biochar nanorods derived from rice husk. The resulting nanocomposites were characterized using various techniques, including electron microscopy, spectroscopy, and X-ray diffraction, confirming the successful synthesis and modification of the materials.  

The study’s most striking finding is the nanocomposite’s exceptional efficiency in removing methylene blue, a common water pollutant. The material achieved complete removal (100%) of the dye from a 20 ppm solution in just 20 minutes. Furthermore, the nanocomposites exhibited significant biocidal activity against Staphylococcus aureus, Escherichia coli, and Candida albican.  

SOURCE: Ghanem, A. F., Badawy, A. A., Youssef, A. A., Yehia, N. S., Issa, F. A., & Nofal, M. A. (2025). Polyvinyl alcohol film comprising biochar modified titanium dioxide nanocomposites as decoloring and disinfectant agents. Scientific Reports, 15, 11423.