Low concentration CO2 can be reused in biodegradable plastic precursor using artificial photosynthesis. A research team led by Professor Yutaka Amao from Osaka Metropolitan University has successfully demonstrated the synthesis of poly-3-hydroxybutyrate, a biodegradable plastic, from waste aceton
Using energy from light equivalent to sunlight the artificial photosynthesis system uses enzymes and a rhodium catalyst to produce a biodegradable plastic precursor. Now for the first time, the process works using low concentrations of CO2, similar to exhaust gas, and waste acetone as raw materials.
Poly-3-hydroxybutyrate—a biodegradable plastic—is a strong water-resistant polyester often used in packaging materials, made from 3-hydroxybutyrate as a precursor. In previous studies, a research team led by Professor Yutaka Amao from the Research Center for Artificial Photosynthesis at Osaka Metropolitan University, found that 3-hydroxybutyrate can be synthesized from COor sodium bicarbonate.2
—equivalent to exhaust gas from power plants, chemical plants, or steel factories. Acetone is a relatively inexpensive and reasonably harmless chemical used in many different laboratory settings, either for reactions or as a cleaning agent, which produces waste acetone. The acetone and COacted as raw materials to synthesize 3-hydroxybutyrate using artificial photosynthesis, powered by light equivalent to sunlight.
After 24 hours, more than 60% of acetone had been successfully converted to 3-hydroxybutyrate. Their findings were published on March 1, 2023, in the journal“In the future, we aim to develop artificial photosynthesis technology further, so that it can use acetone from liquid waste and as well as exhaust gas from the laboratory as raw materials,” stated Professor Amao.
Reference: “Visible-light-driven 3-hydroxybutyrate production from acetone and low concentrations of COwith a system of hybridized photocatalytic NADH regeneration and multi-biocatalysts” by Yu Kitaa and Yutaka Amao, 1 March 2023,
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