2026-02-10 九州大学
図1. (a) 光照射下におけるCO₂とPETプラスチックの同時光触媒変換の概念図。(b) 本研究で使用した光反応器の模式図。(c) 水酸ラジカルを介したCO₂還元とPET酸化のカップリングを示す提案反応経路。
＜関連情報＞
- https://www.kyushu-u.ac.jp/ja/researches/view/1415
- https://www.kyushu-u.ac.jp/f/64820/26_0210_02.pdf
- https://onlinelibrary.wiley.com/doi/10.1002/smll.202513379
汚染物質から製品へ： CO2とプラスチック廃棄物の同時変換のためのカスタマイズされた多成分光触媒 Pollutants to Products: A Tailored Multicomponent Photocatalyst for Simultaneous CO2 and Plastic Waste Conversion
Thanh Tam Nguyen, Junji Nakamura, Kaveh Edalati
Smell Published: 28 January 2026
DOI:https://doi.org/10.1002/smll.202513379
ABSTRACT
Global CO2 emissions and plastic pollutants are two of the most urgent environmental challenges. Here, we report a unified photocatalytic strategy that simultaneously converts CO2 and polyethylene terephthalate (PET) waste into value-added products under light irradiation. CO2 is selectively reduced to CO with over 95% selectivity, while PET is transformed to methane, terephthalate, ethylene glycol, glycolate, and acetate. This dual process is enabled by a distorted high-entropy oxide (BaTiNbTaZnO9), containing electron-accepting d0 cations (Ba, Ti, Nb, and Ta), electron-donating d10 cations (Zn), and Lewis-basic Ba sites for CO2 adsorption, whose distorted atomic environment was confirmed by synchrotron X-ray adsorption spectroscopy. The cooperative use of CO2 and plastic as complementary redox partners eliminates sacrificial agents and enhances redox efficiency compared with conventional CO2 conversion. Beyond mitigating two persistent pollutants, this solar-driven approach also suggests a pathway for microplastic degradation, establishing a scalable concept for integrated waste-to-fuel technologies.
