التفاصيل البيبلوغرافية
| العنوان: |
Direct Photoreforming of Real-World Polylactic Acid Plastics into Highly Selective Value-Added Pyruvic Acid under Visible Light |
| المؤلفون: |
Yingxuan Miao, Yunxuan Zhao, Junyu Gao, Jinhu Wang, Tierui Zhang |
| سنة النشر: |
2024 |
| المجموعة: |
Smithsonian Institution: Figshare |
| مصطلحات موضوعية: |
Biochemistry, Microbiology, Biotechnology, Evolutionary Biology, Ecology, Immunology, Inorganic Chemistry, Space Science, Environmental Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, repurposing plastic waste, pivotal biodegradable polymer, organic products associated, organic oxidation products, liquid products ), highly selective value, experimental findings elucidate, effective recycling techniques, current environmental challenges, 8 μmol g, photoreforming route capable, added pyruvic acid, 2 , pyruvic acid, photoreforming pathway, direct photoreforming, valuable chemicals, typical cocatalyst, thus offering, sustainable direct |
| الوصف: |
Although polylactic acid (PLA) represents a pivotal biodegradable polymer, its biodegradability has inadvertently overshadowed the development of effective recycling techniques, leading to the potential wastage of carbon resources. The photoreforming–recycling approach for PLA exhibits significant potential in terms of concepts and methods. However, the reaction faces enormous challenges due to the limited selectivity of organic oxidation products as well as the increased costs and challenging separation of organic products associated with alkali-solution-assisted prehydrolysis. Herein, we report an alkali-free direct-photoreforming pathway for real-world PLA plastics utilizing the Pd-CdS photocatalyst under visible-light illumination, obviating the need for chemical pretreatment of PLA. The devised pathway successfully produces H 2 at a rate of 49.8 μmol g cat. –1 h –1 , sustained over 100 h, and exhibits remarkable selectivity toward pyruvic acid (95.9% in liquid products). Additionally, experimental findings elucidate that Pd sites not only function as a typical cocatalyst for enhancing the photocatalytic evolution of H 2 but also suppress competitive side reactions (e.g., lactic acid coupling or decarboxylation), consequently augmenting the yield and selectivity of pyruvic acid and H 2 . This investigation provides a straightforward and sustainable direct-photoreforming route capable of simultaneously mitigating and repurposing plastic waste into valuable chemicals, thus offering a promising solution to the current environmental challenges. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| Relation: |
https://figshare.com/articles/journal_contribution/Direct_Photoreforming_of_Real-World_Polylactic_Acid_Plastics_into_Highly_Selective_Value-Added_Pyruvic_Acid_under_Visible_Light/25121931 |
| DOI: |
10.1021/jacs.3c13000.s001 |
| الاتاحة: |
https://doi.org/10.1021/jacs.3c13000.s001 |
| Rights: |
CC BY-NC 4.0 |
| رقم الانضمام: |
edsbas.960105 |
| قاعدة البيانات: |
BASE |