有機金属構造体を用いたプラスチックの分解を世界で初めて実証 Researchers first to demonstrate use of metal-organic frameworks to degrade plastics
2022-04-12 ノースウェスタン大学
必要なのは、プラスチック、水素、触媒の3つだけである。さらに、分解されたプラスチックの成分のひとつが、プラスチックの製造に使われる化学物質であるテレフタル酸であることも重要なポイントです。
＜関連情報＞
- https://news.northwestern.edu/stories/2022/04/metal-organic-framework-breaks-down-plastic-bottles/
- https://onlinelibrary.wiley.com/doi/10.1002/anie.202117528
相転移型ジルコニウムベース有機金属構造体によるポリエチレンテレフタレートの触媒的分解反応 Catalytic Degradation of Polyethylene Terephthalate Using a Phase-Transitional Zirconium-Based Metal-Organic Framework
Yufang Wu,Xingjie Wang,Kent O. Kirlikovali,Xinyi Gong,Ahmet Atilgan,Kaikai Ma,Neil M. Schweitzer,Nathan C. Gianneschi,Zhong Li,Xuan Zhang,Omar K Farha,
Wiley Online Library First published: 30 March 2022
https://doi.org/10.1002/anie.202117528
Abstract
Polyethylene terephthalate (PET) is utilized as one of the most popular consumer plastics worldwide, but difficulties associated with recycling PET have generated a severe environmental crisis with most PET ending its lifecycle in landfills. We report that zirconium-based metal–organic framework (Zr-MOF) UiO-66 deconstructs waste PET into the building blocks terephthalic acid (TA) and mono-methyl terephthalate (MMT) within 24 hours at 260 °C (total yield of 98% under 1 atm H 2 and 81% under 1 atm Ar). Extensive structural characterization studies reveal that during the degradation process, UiO-66 undergoes an intriguing transformation into MIL-140A, which is another Zr-MOF that shows good catalytic activity toward PET degradation under similar reaction conditions. These results illustrate the diversity of applications for Zr-MOFs and establish MOFs as a new class of polymer degradation catalysts with the potential to address long-standing challenges associated with plastic waste.
