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Scientists are advancing a promising solution to two of the world’s biggest challenges – plastic pollution and clean energy – by transforming waste plastics into valuable fuels using sunlight.
A new paper led by Adelaide University PhD candidate Xiao Lu explores how solar-powered technologies can convert discarded plastics into hydrogen, syngas and other useful industrial chemicals, offering a pathway toward a more sustainable, circular economy.
Globally, more than 460 million tonnes of plastic are produced each year, with millions of tonnes leaking into the environment. At the same time, the urgent need to reduce reliance on fossil fuels has driven the search for cleaner energy sources.
The research highlights how plastics – rich in carbon and hydrogen – can be repurposed as an untapped resource rather than waste. The process, known as solar-driven photoreforming, uses light-activated materials called photocatalysts to break down plastics at relatively low temperatures. These reactions can produce hydrogen – a clean fuel with zero emissions at the point of use – as well as other valuable chemicals used in industry.
Unlike traditional water splitting for hydrogen production, plastic-based photoreforming is more energy-efficient because plastics are easier to oxidise, and the process is potentially more viable for large-scale application.
Recent studies have demonstrated impressive results. Researchers have achieved high rates of hydrogen production, acetic acid and even diesel-range hydrocarbons. In some cases, conversion systems have operated continuously for more than 100 hours, highlighting their growing stability and performance.
However, this study also outlines significant challenges that must be overcome before the technology can be widely deployed.
Source: Adelaide University News
Image: FCW