| Title |
Ultrafast and highly-selective upcycling of plastic polylactic acid waste driven by ZnInFe-mixed metal oxide |
| ID_Doc |
8106 |
| Authors |
Zhou, JC; Qin, JB; Li, B; Luo, CJ; Han, JB; Hu, YQ; Zhang, WJ; Dou, YB |
| Title |
Ultrafast and highly-selective upcycling of plastic polylactic acid waste driven by ZnInFe-mixed metal oxide |
| Year |
2024 |
| Published |
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| Abstract |
Chemical upcycling of waste plastics represents an appealing way to achieve a circular economy and mitigate environmental problems but remains a huge challenge. Herein, we report a heterojunction photocatalyst (ZnInFe-mixed metal oxide, denoted as ZnInFe-MMO) for the rapid valorization of polylactic acid (PLA) via a developed alkali-assisted photocatalysis system. The ZnInFe-MMO featured with a double Z-Scheme structure is favorable for light harvesting and electron-hole separation. Moreover, the operando characterizations and theoretical simulations confirm that the ZnInFe-MMO affords a remarkably decreased barrier for the rate-determining step (formation of *LA intermediate) while inhibiting the C-C breakage in the side reaction. As a result, the ZnInFe-MMO attains a similar to 100% conversion and similar to 99% selectivity toward sodium lactate (NaLA), which is preponderant to the state-of-the-art photocatalysts. In addition, such an effective route is also demonstrated in various real-world PLA waste. |
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