Water Remediation and Clean Batteries at EHU’s Science Week

BCMaterials once again played a prominent role at the University of the Basque Country’s (EHU) Science Week, held from November 5–9. Our center took part throughout all five days of the largest science outreach event in the Basque Country.

Hundreds of visitors—from school groups to families—stopped by our science corner, where we showcased the potential of new materials for environmental remediation and sustainable energy generation through five hands-on demonstrations.

In the first group of experiments, we highlighted the ability of metal–organic frameworks (MOFs) to remove heavy metals, PFAS and other contaminants from water, as well as to recover valuable elements present in wastewater, including critical raw materials. We also demonstrated the photocatalytic activity of nanomaterials to break down pollutants and convert them into harmless end products such as water.

On the sustainable energy side, we presented our paper-based batteries designed to power small, single-use devices—such as diagnostic tests—offering an eco-friendly alternative to conventional button cells. We also showcased an energy capacitor consisting of two facing carbon-paper electrodes separated by a membrane made of biopolymers, water, and salt, where electrical charges accumulate.

The fifth demonstration focused on sustainable batteries using photocurable liquid materials derived from biomass and natural oils. When exposed to ultraviolet light, these liquids solidify into a material that can replace traditional liquid electrolytes, reducing the environmental impact and flammability of batteries.