Molecular oxygen-assisted in defect-rich ZnO for catalytic depolymerization of polyethylene terephthalate
Summary: Polyethylene terephthalate (PET) is the most produced polyester plastic; its waste has a disruptive impact on the environment and ecosystem. Here, we report a catalytic depolymerization of PET into bis(2-hydroxyethyl) terephthalate (BHET) using molecule oxygen (O2)−assisted in defect-rich Z...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-08-01
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| Series: | iScience |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2589004223015699 |
| _version_ | 1827867619278979072 |
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| author | Jingjing Cao Yuheng Lin Tianpeng Zhou Wei Wang Quanxing Zhang Bingcai Pan Wei Jiang |
| author_facet | Jingjing Cao Yuheng Lin Tianpeng Zhou Wei Wang Quanxing Zhang Bingcai Pan Wei Jiang |
| author_sort | Jingjing Cao |
| collection | DOAJ |
| description | Summary: Polyethylene terephthalate (PET) is the most produced polyester plastic; its waste has a disruptive impact on the environment and ecosystem. Here, we report a catalytic depolymerization of PET into bis(2-hydroxyethyl) terephthalate (BHET) using molecule oxygen (O2)−assisted in defect-rich ZnO. At air, the PET conversion rate, the BHET yield, and the space-time yield are 3.5, 10.6, and 10.6 times higher than those in nitrogen, respectively. Combining structural characterization with the results of DFT calculations, we conclude that the (100) facet of defect-rich ZnO nanosheets conducive to the formation of reactive oxygen species (∗O2−) and Zn defect, promotes the PET breakage of the ester bond and thus complete the depolymerization processed. This approach demonstrates a sustainable route for PET depolymerization by molecule-assisted defect engineering. |
| first_indexed | 2024-03-12T15:19:07Z |
| format | Article |
| id | doaj.art-9bed0b02ab91401b9ccbd592be67f514 |
| institution | Directory Open Access Journal |
| issn | 2589-0042 |
| language | English |
| last_indexed | 2024-03-12T15:19:07Z |
| publishDate | 2023-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | iScience |
| spelling | doaj.art-9bed0b02ab91401b9ccbd592be67f5142023-08-11T05:35:14ZengElsevieriScience2589-00422023-08-01268107492Molecular oxygen-assisted in defect-rich ZnO for catalytic depolymerization of polyethylene terephthalateJingjing Cao0Yuheng Lin1Tianpeng Zhou2Wei Wang3Quanxing Zhang4Bingcai Pan5Wei Jiang6State Key Laboratory of Pollution Control and Resources Reuse, National Engineering Research Center for Organic Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, ChinaState Key Laboratory of Pollution Control and Resources Reuse, National Engineering Research Center for Organic Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, ChinaState Key Laboratory of Pollution Control and Resources Reuse, National Engineering Research Center for Organic Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, ChinaDepartment of Chemistry and Centre for Pharmacy, University of Bergen, 5007 Bergen, NorwayState Key Laboratory of Pollution Control and Resources Reuse, National Engineering Research Center for Organic Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, ChinaState Key Laboratory of Pollution Control and Resources Reuse, National Engineering Research Center for Organic Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; Corresponding authorState Key Laboratory of Pollution Control and Resources Reuse, National Engineering Research Center for Organic Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; Corresponding authorSummary: Polyethylene terephthalate (PET) is the most produced polyester plastic; its waste has a disruptive impact on the environment and ecosystem. Here, we report a catalytic depolymerization of PET into bis(2-hydroxyethyl) terephthalate (BHET) using molecule oxygen (O2)−assisted in defect-rich ZnO. At air, the PET conversion rate, the BHET yield, and the space-time yield are 3.5, 10.6, and 10.6 times higher than those in nitrogen, respectively. Combining structural characterization with the results of DFT calculations, we conclude that the (100) facet of defect-rich ZnO nanosheets conducive to the formation of reactive oxygen species (∗O2−) and Zn defect, promotes the PET breakage of the ester bond and thus complete the depolymerization processed. This approach demonstrates a sustainable route for PET depolymerization by molecule-assisted defect engineering.http://www.sciencedirect.com/science/article/pii/S2589004223015699Physical inorganic chemistryInterface scienceApplied chemistry |
| spellingShingle | Jingjing Cao Yuheng Lin Tianpeng Zhou Wei Wang Quanxing Zhang Bingcai Pan Wei Jiang Molecular oxygen-assisted in defect-rich ZnO for catalytic depolymerization of polyethylene terephthalate iScience Physical inorganic chemistry Interface science Applied chemistry |
| title | Molecular oxygen-assisted in defect-rich ZnO for catalytic depolymerization of polyethylene terephthalate |
| title_full | Molecular oxygen-assisted in defect-rich ZnO for catalytic depolymerization of polyethylene terephthalate |
| title_fullStr | Molecular oxygen-assisted in defect-rich ZnO for catalytic depolymerization of polyethylene terephthalate |
| title_full_unstemmed | Molecular oxygen-assisted in defect-rich ZnO for catalytic depolymerization of polyethylene terephthalate |
| title_short | Molecular oxygen-assisted in defect-rich ZnO for catalytic depolymerization of polyethylene terephthalate |
| title_sort | molecular oxygen assisted in defect rich zno for catalytic depolymerization of polyethylene terephthalate |
| topic | Physical inorganic chemistry Interface science Applied chemistry |
| url | http://www.sciencedirect.com/science/article/pii/S2589004223015699 |
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