Dublin researchers extract graphene from e-waste using kitchen blender and newspaper

Inside discarded phones and laptops sits a material most recyclers never bother to recover: graphite heat spreaders, thin layers of carbon designed to pull warmth away from processors before the device dies. When 62 million tonnes of electronic waste entered the global waste stream in 2022, only 22.3 percent of it was properly collected and recycled. The graphite went largely untouched, overlooked in favor of the metals that dominate recovery operations. But graphite, chemically speaking, is simply graphene waiting to be separated—single-atom-thick carbon sheets stacked like a deck of cards, held together by nothing more than proximity.

Conor Boland and his team at Dublin City University decided to see what would happen if they treated this discarded graphite the way materials scientists have long treated pristine graphite: by pulling the sheets apart. The technique, called liquid-phase exfoliation, is straightforward in principle. You disperse graphite in a liquid and apply enough energy to break the stacked layers. The Irish-pioneered method had been refined over years in university labs with expensive equipment. Boland's group asked a simpler question: what if you used a kitchen blender instead?

The blender worked. A kitchen sieve filtered out the lumps that refused to separate. But a new problem emerged immediately. Once the graphene sheets came apart, they wanted to stick back together, collapsing into useless clumps within minutes. Researchers typically solved this with specialist solvents or chemical stabilizers—materials that cost money and required careful handling. Boland's team tried something different. They took old newspaper, washed it, softened it in tap water, and blended it into a fiber-rich liquid. The cellulose in the newspaper—the same material that gives paper its structure—acted as a temporary barrier between the freshly separated graphene sheets, holding them apart like tiny spacers. Without the newspaper, the suspension settled and died in minutes. With it, the material remained usable for several hours and could be redispersed with a shake of the container.

Most of the experiments used commercially available graphite heat-spreading material, since a single phone contains only a small amount. But the team also disassembled an actual discarded smartphone, recovered the graphite from inside, and ran it through the same process. The e-waste graphite broke down into thin carbon sheets just as readily as the commercial material. Confirming that the result was genuinely graphene still required the standard laboratory equipment back at DCU—electron microscopes and other characterization tools that verify the atomic structure. But the production itself needed nothing more than what you might find in a kitchen.

This work extends an earlier study from the same group, their "Hometronics" project, which had shown that graphene could be made from pencil lead, tap water, soap, and coffee filters. "We needed sophisticated scientific equipment to prove that we'd made graphene, but actually making it was the accessible bit," Boland said. The researchers are careful not to position this as a replacement for factory-scale graphene production, which operates at volumes and purities this method cannot match. Instead, they see it as a way to lower the barrier to entry for labs operating on tight budgets, for schools, for citizen-science projects. The idea is that local, low-cost processing could produce material that a university or shared facility then verifies with advanced equipment, rather than requiring expensive machinery just to begin experimenting. In a field where access to materials and tools often determines who can participate, that shift matters. It means the 77.7 percent of e-waste that currently goes unrecycled might become a resource for the researchers who need it most.