New solar-powered process turns plastic waste into clean hydrogen

For many years scientists have been trying to reduce carbon footprints and recycle waste material into reusable substances.

Following this, scientists are developing a new way to tackle two major global problems at once, such as plastic pollution and the demand for clean energy.

A recent study led by Adelaide University PhD candidate Xiao Lu examines how solar-powered systems can convert waste plastics into hydrogen, syngas, and other industrial chemicals.

The research, published in Chem Catalysis, shows that plastics, which are rich in carbon and hydrogen, can be treated as a resource rather than just waste.

By simply using sunlight, they are finding ways to turn discarded plastic into useful fuels like hydrogen, offering a breakthrough solution to both pollution and energy challenges, which could transform trash into a valuable resource for a low-carbon future.

The method called solar-driven photoreforming, relies on light-sensitive materials known as 'photocatalysts' that use sunlight to break down plastics at relatively low temperatures.

Researchers believe plastic wastes are a hidden energy source, and at the same time, the need to move away from fossil fuels has intensified the search for cleaner energy alternatives.

Notably, more than 460 million tonnes of plastic are produced worldwide each year, and large amounts end up polluting land and oceans.

"Plastic is often seen as a major environmental problem, but it also represents an opportunity, and if we can efficiently convert waste plastics into clean fuels using sunlight, we can address pollution and energy challenges at the same time."