Advances in upcycling of post-consumer PET

doi:10.11949/0438-1157.20241277

Abstract

Abstract:

Recycling and enhancing the application value of retired polyethylene terephthalate (PET) is of great significance for reducing resource waste and environmental pollution. This paper reviews the research progress of recycling and high-value reuse of retired PET, summarizes the recycling methods including landfill, incineration, pyrolysis, and bio-enzyme degradation, and deeply discusses chemical recycling and catalytic recycling technologies such as photo-, electro-, and hydrogenolysis, focusing on the transformation path of retired PET into high-value products such as recycled PET, copolyesters, small molecule chemicals, composite materials, and other materials. By adopting an integrated depolymerization-repolymerization process, the separation steps in the depolymerization of retired PET can be effectively reduced, thereby lowering costs while achieving product upgrading. With the improvement of pretreatment and depolymerization efficiency in sorting and impurity removal of retired PET, the construction of closed-loop recycling systems, the development of efficiency-enhancing additives, and the exploration of efficient biological depolymerization technologies, the industrialization of high-value reuse of retired PET will be greatly promoted.

Key words: post-consumer PET, recovery, upcycling, degradation, sustainability

摘要：

回收并提升退役聚对苯二甲酸乙二醇酯（PET）的应用价值，对于减少资源浪费和环境污染具有重要意义。综述了退役PET的回收处理技术及高值化再利用的研究进展，概述了包括填埋、焚烧、热解、生物酶降解在内的回收方法，并深入探讨了化学回收及光、电、氢解等催化回收技术，重点聚焦了退役PET向再生PET、共聚酯、小分子化学品、复合材料及其他材料等高值产品的转化路径。通过采用解聚-再聚合一体化工艺，可有效减少退役PET解聚过程中的产物分离步骤，在降低成本的同时，实现了产品升级。随着退役PET分拣除杂等预处理与解聚效率的提升、闭环回收系统的构建、增效添加剂的研发及高效生物解聚技术的开拓，将极大推动退役PET高值化再利用的工业化进程。

关键词: 退役PET, 回收, 高值回用, 降解, 可持续性

CLC Number:

TQ 028.8

Chenlong GUO, Zhengqi PENG, Bingxue JIANG, Zhengkai WU, Deliang WANG, Qingyue WANG, Jieyuan ZHENG, Lim Khak Ho, Shengbin SHI, Xuan YANG, Pingwei LIU, Wenjun WANG. Advances in upcycling of post-consumer PET[J]. CIESC Journal, 2025, 76(2): 532-542.

郭琛龙, 彭正奇, 姜冰雪, 吴正凯, 王德良, 王青月, 郑杰元, Ho Lim Khak, 史胜斌, 杨轩, 刘平伟, 王文俊. 退役PET高值回用的研究进展[J]. 化工学报, 2025, 76(2): 532-542.

Figures/Tables 4

References 59

60	Uekert T, Kuehnel M F, Wakerley D W, et al. Plastic waste as a feedstock for solar-driven H₂ generation[J]. Energy & Environmental Science, 2018, 11(10): 2853-2857.
61	Li M, Zhang S B. Tandem chemical depolymerization and photoreforming of waste PET plastic to high-value-added chemicals[J]. ACS Catalysis, 2024, 14(5): 2949-2958.
62	Wang G H, Chen Z J, Wei W, et al. Electrocatalysis-driven sustainable plastic waste upcycling[J]. Electron, 2024, 2(2): e34.
63	Yan Y F, Zhou H, Xu S M, et al. Electrocatalytic upcycling of biomass and plastic wastes to biodegradable polymer monomers and hydrogen fuel at high current densities[J]. Journal of the American Chemical Society, 2023, 145(11): 6144-6155.
64	Carta D, Cao G, D'Angeli C. Chemical recycling of poly(ethylene terephthalate) (PET) by hydrolysis and glycolysis[J]. Environmental Science and Pollution Research, 2003, 10(6): 390-394.
65	Jiang X L, Chang Z L, Yang L, et al. Hydrogenation of waste PET degraded bis(2-hydroxyethyl)cyclohexane-1,4-dicarboxylate to 1,4-cyclohexanedimethanol over Cu-based catalysts[J]. Fuel, 2024, 363: 130944.
66	Uekert T, Kasap H, Reisner E. Photoreforming of nonrecyclable plastic waste over a carbon nitride/nickel phosphide catalyst[J]. Journal of the American Chemical Society, 2019, 141(38): 15201-15210.
67	Zhang S, Li H B, Wang L, et al. Boosted photoreforming of plastic waste via defect-rich NiPS₃ nanosheets[J]. Journal of the American Chemical Society, 2023, 145(11): 6410-6419.
68	Du M M, Zhang Y, Kang S L, et al. Trash to treasure: photoreforming of plastic waste into commodity chemicals and hydrogen over MoS₂-tipped CdS nanorods[J]. ACS Catalysis, 2022, 12(20): 12823-12832.
69	Han M, Zhu S J, Xia C L, et al. Photocatalytic upcycling of poly(ethylene terephthalate) plastic to high-value chemicals[J]. Applied Catalysis B: Environmental, 2022, 316: 121662.
70	Gong X Q, Tong F X, Ma F H, et al. Photoreforming of plastic waste poly(ethylene terephthalate) via in situ derived CN-CNTs-NiMo hybrids[J]. Applied Catalysis B: Environment and Energy, 2022, 307: 121143.
71	Zhou H, Ren Y, Li Z H, et al. Electrocatalytic upcycling of polyethylene terephthalate to commodity chemicals and H₂ fuel[J]. Nature Communications, 2021, 12(1): 4679.
72	Song M W, Wu Y F, Zhao Z Y, et al. Corrosion engineering of part-per-million single atom Pt₁/Ni(OH)₂ electrocatalyst for PET upcycling at ampere-level current density[J]. Advanced Materials, 2024, 36(23): e2403234.
73	Chen J L, Zhang F Z, Kuang M, et al. Unveiling synergy of strain and ligand effects in metallic aerogel for electrocatalytic polyethylene terephthalate upcycling[J]. Proceedings of the National Academy of Sciences of the United States of America, 2024, 121(17): e2318853121.
74	Kang H X, He D, Yan X X, et al. Cu promoted the dynamic evolution of Ni-based catalysts for polyethylene terephthalate plastic upcycling[J]. ACS Catalysis, 2024, 14(7): 5314-5325.
75	Wang J Y, Li X, Wang M L, et al. Electrocatalytic valorization of poly(ethylene terephthalate) plastic and CO₂ for simultaneous production of formic acid[J]. ACS Catalysis, 2022, 12(11): 6722-6728.
76	Krall E M, Klein T W, Andersen R J, et al. Controlled hydrogenative depolymerization of polyesters and polycarbonates catalyzed by ruthenium(Ⅱ) PNN pincer complexes[J]. Chemical Communications, 2014, 50(38): 4884-4887.
77	Fuentes J A, Smith S M, Scharbert M T, et al. On the functional group tolerance of ester hydrogenation and polyester depolymerisation catalysed by ruthenium complexes of tridentate aminophosphine ligands[J]. Chemistry-A European Journal, 2015, 21(30): 10851-10860.
78	Wei Z Y, Li H X, Wang Y J, et al. A tailored versatile and efficient NHC-based NNC-pincer manganese catalyst for hydrogenation of polar unsaturated compounds[J]. Angewandte Chemie International Edition, 2023, 62(23): e202301042.
79	Wu P Y, Lu G P, Cai C. Cobalt-molybdenum synergistic catalysis for the hydrogenolysis of terephthalate-based polyesters[J]. Green Chemistry, 2021, 23(21): 8666-8672.
80	Zhang M H, Yu Y K, Yan B H, et al. Full valorisation of waste PET into dimethyl terephthalate and cyclic arylboronic esters[J]. Applied Catalysis B: Environment and Energy, 2024, 352: 124055.
81	Li Y W, Wang M, Liu X W, et al. Catalytic transformation of PET and CO₂ into high-value chemicals[J]. Angewandte Chemie International Edition, 2022, 61(10): e202117205.
82	Velásquez E J, Garrido L, Guarda A, et al. Increasing the incorporation of recycled PET on polymeric blends through the reinforcement with commercial nanoclays[J]. Applied Clay Science, 2019, 180: 105185.
83	Belioka M P, Markozanne G, Chrissopoulou K, et al. Advanced plastic waste recycling—the effect of clay on the morphological and thermal behavior of recycled PET/PLA sustainable blends[J]. Polymers, 2023, 15(14): 3145.
84	Paszkiewicz S, Irska I, Piesowicz E. Environmentally friendly polymer blends based on post-consumer glycol-modified poly(ethylene terephthalate) (PET-G) foils and poly(ethylene 2,5-furanoate) (PEF): preparation and characterization[J]. Materials, 2020, 13(12): 2673.
85	Sangkhawasi M, Remsungnen T, Vangnai A S, et al. Prediction of the glass transition temperature in polyethylene terephthalate/polyethylene vanillate (PET/PEV) blends: a molecular dynamics study[J]. Polymers, 2022, 14(14): 2858.
86	张丰. 基于聚丁二酸乙二醇酯预聚体的新型多嵌段共聚酯的合成、结构与性能研究[D]. 北京: 北京化工大学, 2023.
	Zhang F. Synthesis, structure and properties of novel multiblock copolyesters based on poly(ethylene succinate) prepolymer[D]. Beijing: Beijing University of Chemical Technology, 2023.
87	Li S Z, Wang W, Yu L, et al. Influence of different compatibilizers on the morphology and properties of PA6/PET/glass fiber composites[J]. Journal of Applied Polymer Science, 2018, 135(26): e46429.
88	Li S C, Lu L N, Zeng W. Thermostimulative shape-memory effect of reactive compatibilized high-density polyethylene/poly(ethylene terephthalate) blends by an ethylene-butyl acrylate-glycidyl methacrylate terpolymer[J]. Journal of Applied Polymer Science, 2009, 112(6): 3341-3346.
89	Tahmasebi F, Jafari S H, Farnia S M F. SbB-g-GMA copolymer as a dual functional reactive compatibilizer and impact modifier for potential recycling of PET and PS via melt blending approach[J]. Journal of Polymers and the Environment, 2023, 31(7): 3106-3119.
90	Martey S, Jamalzadeh M, Chen W T, et al. The role of nanoclay in processing immiscible polypropylene and poly(ethylene terephthalate) waste blends using twin screw extrusion[J]. Composites Part B: Engineering, 2024, 276: 111320.
91	Coba-Daza S, Otaegi I, Aramburu N, et al. Unlocking superior properties in polypropylene/polyethylene terephthalate (PP/PET) blends using an ethylene-butylene-acrylate terpolymer reactive compatibilizer[J]. Polymer Testing, 2024, 130: 108293.
92	Shahrajabian H, Sadeghian F. The investigation of alumina nanoparticles' effects on the mechanical and thermal properties of HDPE/rPET/MAPE blends[J]. International Nano Letters, 2019, 9(3): 213-219.
93	Wang D R, Luo F L, Luo C H. A novel blend material to improve the crystallization and mechanical properties of poly (ethylene terephthalate)[J]. Journal of Polymer Research, 2019, 26(7): 170.
94	Han K H, Jang M G, Juhn K J, et al. The effects of compatibilizers on the morphological, mechanical, and optical properties of biaxially oriented poly(ethylene terephthalate)/syndiotactic polystyrene blend films[J]. Macromolecular Research, 2018, 26(3): 254-262.
1	Ren T X, Zhan H H, Xu H Z, et al. Recycling and high-value utilization of polyethylene terephthalate wastes: a review[J]. Environmental Research, 2024, 249: 118428.
2	Hu B, Wang S, Yan J B, et al. Review of waste plastics treatment and utilization: efficient conversion and high value utilization[J]. Process Safety and Environmental Protection, 2024, 183: 378-398.
3	Wang T, Liu B, Xue Y J, et al. Effect of textile waste on incineration behavior of dyeing sludge: combustion characteristics, gas emissions, kinetics[J]. Journal of Cleaner Production, 2024, 435: 140619.
4	Melikoglu M, Asci A. Quantification of Turkey's wasted, landfilled, recycled and combusted PET[J]. Environmental Development, 2022, 44: 100773.
5	Gong H, Li R X, Li F, et al. Microplastic pollution in water environment of typical nature reserves and scenery districts in Southern China[J]. Science of the Total Environment, 2023, 903: 166628.
6	Sinha V, Patel M R, Patel J V. Pet waste management by chemical recycling: a review[J]. Journal of Polymers and the Environment, 2010, 18(1): 8-25.
7	Chen J K, Dul S, Lehner S, et al. Mechanical recycling of PET containing mixtures of phosphorus flame retardants[J]. Journal of Materials Science & Technology, 2024, 194: 167-179.
8	Liu Y F, Fu W M, Liu T, et al. Microwave pyrolysis of polyethylene terephthalate (PET) plastic bottle sheets for energy recovery[J]. Journal of Analytical and Applied Pyrolysis, 2022, 161: 105414.
9	Yoshioka T, Kitagawa E, Mizoguchi T, et al. High selective conversion of poly(ethylene terephthalate) into oil using Ca(OH)₂ [J]. Chemistry Letters, 2004, 33(3): 282-283.
10	Qiu J R, Chen Y X, Zhang L Q, et al. A comprehensive review on enzymatic biodegradation of polyethylene terephthalate[J]. Environmental Research, 2024, 240: 117427.
11	Tokiwa Y, Suzuki T. Hydrolysis of polyesters by lipases[J]. Nature, 1977, 270(5632): 76-78.
12	Mican J, Jaradat D M M, Liu W D, et al. Exploring new galaxies: perspectives on the discovery of novel PET-degrading enzymes[J]. Applied Catalysis B: Environmental, 2024, 342: 123404.
95	Lotfi M. Optimization of catalyst content for recycled polyethylene terephthalate (PET) and polycarbonate (PC) blending[J]. Polymer Bulletin, 2023, 80(11): 12319-12331.
96	Si G F, Li C, Chen M, et al. Polymer multi-block and multi-block⁺ strategies for the upcycling of mixed polyolefins and other plastics[J]. Angewandte Chemie International Edition, 2023, 62(49): e202311733.
97	Padhan R K, Gupta A A. Preparation and evaluation of waste PET derived polyurethane polymer modified bitumen through in situ polymerization reaction[J]. Construction and Building Materials, 2018, 158: 337-345.
98	Li F, Yao X Q, Ding R, et al. Directional glycolysis of waste PET using deep eutectic solvents for preparation of aromatic-based polyurethane elastomers[J]. Green Chemistry, 2024, 26(18): 9802-9813.
99	Zhou X, Wang G S, Li D X, et al. Shape-memory polyurethane elastomer originated from waste PET plastic and their composites with carbon nanotube for sensitive and stretchable strain sensor[J]. Composites Part A: Applied Science and Manufacturing, 2024, 177: 107920.
100	Zhang Y, Tian F, Wu Z S, et al. Chemical conversion of waste PET to valued-added bis(2-hydroxyethyl) terephthalamide through aminolysis[J]. Materials Today Communications, 2022, 32: 104045.
101	Chen Y H, Ranganathan P, Lee Y H, et al. New strategy and polymer design to synthesize polyamide 66 (PA66) copolymers with aromatic moieties from recycled PET (rPET)[J]. ACS Sustainable Chemistry & Engineering, 2021, 9(9): 3518-3528.
102	Bambalaza S E, Xakalashe B S, Coetsee Y, et al. Co-carbonization of discard coal with waste polyethylene terephthalate towards the preparation of metallurgical coke[J]. Materials, 2023, 16(7): 2782.
103	Wang R, Chen X H, Li Q Y, et al. Solvothermal preparation of nitrogen and phosphorus-doped carbon dots with PET waste as precursor and its application[J]. Materials Today Communications, 2023, 34: 104918.
104	Yuan X Z, Kumar N M, Brigljević B, et al. Sustainability-inspired upcycling of waste polyethylene terephthalate plastic into porous carbon for CO₂ capture[J]. Green Chemistry, 2022, 24(4): 1494-1504.
105	Gong Z, Dai Z K, Dong Z Y, et al. Green synthesis of luminescent La-MOF nanoparticle from waste poly(ethylene terephthalate) for high-performance in Fe(Ⅲ) detection[J]. Rare Metals, 2024, 43(8): 3833-3843.
106	Wang C Y, Chu H Y, Wang C C. Converting waste PET plastics to high value-added MOFs-based functional materials: a state of the art review[J]. Coordination Chemistry Reviews, 2024, 518: 216106.
13	Zhang S B, Xue Y Y, Wu Y F, et al. PET recycling under mild conditions via substituent-modulated intramolecular hydrolysis[J]. Chemical Science, 2023, 14(24): 6558-6563.
14	Pham D D, Cho J. Low-energy catalytic methanolysis of poly(ethyleneterephthalate)[J]. Green Chemistry, 2021, 23(1): 511-525.
15	Le N H, Ngoc Van T T, Shong B, et al. Low-temperature glycolysis of polyethylene terephthalate[J]. ACS Sustainable Chemistry & Engineering, 2022, 10(51): 17261-17273.
16	Shukla S R, Harad A M. Aminolysis of polyethylene terephthalate waste[J]. Polymer Degradation and Stability, 2006, 91(8): 1850-1854.
17	Jiang H Y, Zhou J H, Zhou Q, et al. Microwave assisted plastic waste derived O vacancies enriched cobalt oxide/porous carbon material for highly efficient carbamazepine degradation via peroxymonosulfate activation[J]. Chemical Engineering Journal, 2024, 489: 151256.
18	Cho J, Kim B, Kwon T, et al. Electrocatalytic upcycling of plastic waste[J]. Green Chemistry, 2023, 25(21): 8444-8458.
19	Kim S, Kong D, Zheng X L, et al. Upcycling plastic wastes into value-added products via electrocatalysis and photoelectrocatalysis[J]. Journal of Energy Chemistry, 2024, 91: 522-541.
20	Liu S B, Kots P A, Vance B C, et al. Plastic waste to fuels by hydrocracking at mild conditions[J]. Science Advances, 2021, 7(17): eabf8283.
21	Jehanno C, Alty J W, Roosen M, et al. Critical advances and future opportunities in upcycling commodity polymers[J]. Nature, 2022, 603(7903): 803-814.
22	Ügdüler S, van Geem K M, Denolf R, et al. Towards closed-loop recycling of multilayer and coloured PET plastic waste by alkaline hydrolysis[J]. Green Chemistry, 2020, 22(16): 5376-5394.
23	Kim N K, Lee S H, Park H D. Current biotechnologies on depolymerization of polyethylene terephthalate (PET) and repolymerization of reclaimed monomers from PET for bio-upcycling: a critical review[J]. Bioresource Technology, 2022, 363: 127931.
24	Pang K, Kotek R, Tonelli A. Review of conventional and novel polymerization processes for polyesters[J]. Progress in Polymer Science, 2006, 31(11): 1009-1037.
25	Ghosal K, Nayak C. Recent advances in chemical recycling of polyethylene terephthalate waste into value added products for sustainable coating solutions-hope vs. hype[J]. Materials Advances, 2022, 3(4): 1974-1992.
26	Chan K, Zinchenko A. Design and synthesis of functional materials by chemical recycling of waste polyethylene terephthalate (PET) plastic: opportunities and challenges[J]. Journal of Cleaner Production, 2023, 433: 139828.
27	Bai X S, Aireddy D R, Roy A, et al. Solvent-free depolymerization of plastic waste enabled by plastic-catalyst interfacial engineering[J]. Angewandte Chemie International Edition, 2023, 62(46): e202309949.
28	Cao R C, Zhang M Q, Jiao Y C, et al. Co-upcycling of polyvinyl chloride and polyesters[J]. Nature Sustainability, 2023, 6: 1685-1692.
29	Carniel A, Ferreira dos Santos N, Buarque F S, et al. From trash to cash: current strategies for bio-upcycling of recaptured monomeric building blocks from poly(ethylene terephthalate) (PET) waste[J]. Green Chemistry, 2024, 26(10): 5708-5743.
30	Gao P, Lv H, Qian S K, et al. One-step synthesized solid acid catalyst with high Zr content for efficient and green PET degradation in supercritical CO₂ [J]. Industrial & Engineering Chemistry Research, 2024, 63(17): 7593-7604.
31	Sun Q, Zheng Y Y, Yun L X, et al. Fe₃O₄ nanodispersions as efficient and recoverable magnetic nanocatalysts for sustainable PET glycolysis[J]. ACS Sustainable Chemistry & Engineering, 2023, 11(19): 7586-7595.
32	Cheng J N, Xie J, Xi Y J, et al. Selective upcycling of polyethylene terephthalate towards high-valued oxygenated chemical methyl p-methyl benzoate using a Cu/ZrO₂ catalyst[J]. Angewandte Chemie International Edition, 2024, 63(11): e202319896.
33	Yun L X, Wu H, Shen Z G, et al. Ultrasmall CeO₂ nanoparticles with rich oxygen defects as novel catalysts for efficient glycolysis of polyethylene terephthalate[J]. ACS Sustainable Chemistry & Engineering, 2022, 10(16): 5278-5287.
34	Otton J, Ratton S, Vasnev V A, et al. Investigation of the formation of poly(ethylene terephthalate) with model molecules: kinetics and mechanisms of the catalytic esterification and alcoholysis reactions(Ⅱ): Catalysis by metallic derivatives (monofunctional reactants)[J]. Journal of Polymer Science Part A: Polymer Chemistry, 1988, 26(8): 2199-2224.
35	MacDonald W. New advances in poly(ethylene terephthalate) polymerization and degradation[J]. Polymer International, 2002, 51(10): 923-930.
36	Apicella B, Di Serio M, Fiocca L, et al. Kinetic and catalytic aspects of the formation of poly(ethylene terephthalate) (PET) investigated with model molecules[J]. Journal of Applied Polymer Science, 1998, 69(12): 2423-2433.
37	Marullo S, Rizzo C, Dintcheva N T, et al. Amino acid-based cholinium ionic liquids as sustainable catalysts for PET depolymerization[J]. ACS Sustainable Chemistry & Engineering, 2021, 9(45): 15157-15165.
38	Zhou L, Lu X M, Ju Z Y, et al. Alcoholysis of polyethylene terephthalate to produce dioctyl terephthalate using choline chloride-based deep eutectic solvents as efficient catalysts[J]. Green Chemistry, 2019, 21(4): 897-906.
39	Kirstein M, Lücking C, Biermann L, et al. Monomer recycling and repolymerization of post-consumer polyester textiles[J]. Chemie Ingenieur Technik, 2023, 95(8): 1290-1296.
40	Yu Y, Shen G L, Xu T J, et al. Ti-Si composite glycol salts: depolymerization and repolymerization studies of PET[J]. RSC Advances, 2023, 13(51): 36337-36345.
41	Zhang S B, Hu Q K, Zhang Y X, et al. Depolymerization of polyesters by a binuclear catalyst for plastic recycling[J]. Nature Sustainability, 2023, 6: 965-973.
42	Peng Y T, Yang J, Deng C Q, et al. Acetolysis of waste polyethylene terephthalate for upcycling and life-cycle assessment study[J]. Nature Communications, 2023, 14(1): 3249.
43	Rahimi A, García J M. Chemical recycling of waste plastics for new materials production[J]. Nature Reviews Chemistry, 2017, 1: 46.
44	张红明, 赵君宇, 高凤翔, 等. PET的解聚-共缩聚“一锅法”合成生物降解高分子的研究[J]. 高分子学报, 2022, 53(9): 1142-1149.
	Zhang H M, Zhao J Y, Gao F X, et al. Synthesis of biodegradable polymers by “one pot” depolymerization and polycondensation of PET[J]. Acta Polymerica Sinica, 2022, 53(9): 1142-1149.
45	Paek K H, Im S G. Biodegradable aromatic-aliphatic copolyesters derived from bis(2-hydroxyethyl) terephthalate for sustainable flexible packaging applications[J]. ACS Applied Polymer Materials, 2022, 4(8): 5298-5307.
46	Qin L D, Li X X, Ren G, et al. Closed-loop polymer-to-polymer upcycling of waste poly (ethylene terephthalate) into biodegradable and programmable materials[J]. ChemSusChem, 2024, 17(13): e202301781.
47	Panchal S S, Vasava D V. Biodegradable polymeric materials: synthetic approach[J]. ACS Omega, 2020, 5(9): 4370-4379.
48	Flores I, Etxeberria A, Irusta L, et al. PET-ran-PLA partially degradable random copolymers prepared by organocatalysis: effect of poly(L-lactic acid) incorporation on crystallization and morphology[J]. ACS Sustainable Chemistry & Engineering, 2019, 7(9): 8647-8659.
107	Roy S, Maji P K, Goh K L. Sustainable design of flexible 3D aerogel from waste PET bottle for wastewater treatment to energy harvesting device[J]. Chemical Engineering Journal, 2021, 413: 127409.
108	Efimov M N, Vasilev A A, Muratov D G, et al. Conversion of polyethylene terephthalate waste in the presence of cobalt compound into highly-porous metal-carbon nanocomposite (c-PET-Co)[J]. Composites Communications, 2022, 33: 101200.
109	胡延庆, 胡凡, 周剑池, 等. 废弃塑料回收与转化的研究进展[J]. 中国塑料, 2024, 38(4): 79-87.
	Hu Y Q, Hu F, Zhou J C, et al. Research progress in upcycling of waste plastics[J]. China Plastics, 2024, 38(4): 79-87.
110	Liu Z H, Liu S J, Zhang H M, et al. Chemical recycling of post-consumer PET into high-performance polymer aerogels[J]. Journal of Materials Chemistry A, 2024, 12(16): 9454-9461.
49	Zhou J L, Zhu Q Q, Pan W N, et al. Thermal stability of bio-based aliphatic-semiaromatic copolyester for melt-spun fibers with excellent mechanical properties[J]. Macromolecular Rapid Communications, 2021, 42(3): 2000498.
50	尚小愉, 朱坚, 王滢, 等. 侧基含磷阻燃共聚酯的制备及其固相增黏反应[J]. 纺织学报, 2023, 44(7): 1-9.
	Shang X Y, Zhu J, Wang Y, et al. Synthesis and solid-state polymerization of flame retardant copolyester containing phosphorus side groups[J]. Journal of Textile Research, 2023, 44(7): 1-9.
51	Zhang H J, Fang T X, Yao X X, et al. Catalytic amounts of an antibacterial monomer enable the upcycling of poly(ethylene terephthalate) waste[J]. Advanced Materials, 2023, 35(20): 2210758.
52	Fan L X, Chen L, Zhang H Y, et al. Dual photo-responsive diphenylacetylene enables PET in situ upcycling with reverse enhanced UV-resistance and strength[J]. Angewandte Chemie International Edition, 2023, 62(52): e202314448.
53	Rorrer N A, Nicholson S, Carpenter A, et al. Combining reclaimed PET with bio-based monomers enables plastics upcycling[J]. Joule, 2019, 3(4): 1006-1027.
54	Fang T X, Jiang W P, Zheng T F, et al. Catalyst- and solvent-free upcycling of poly(ethylene terephthalate) waste to biodegradable plastics[J]. Advanced Materials, 2024, 36(46): 2403728.
55	Wei X, Zheng W Z, Chen X F, et al. Chemical upcycling of poly(ethylene terephthalate) with binary mixed alcohols toward value-added copolyester by depolymerization and repolymerization strategy[J]. Chemical Engineering Science, 2024, 294: 120103.
56	邓维. 可纺型PET/PEG嵌段共聚酯的合成与性能研究[D]. 杭州: 浙江大学, 2023.
	Deng W. Study on synthesis and properties of spinnable PET/PEG block co-polyesters[D]. Hangzhou: Zhejiang University, 2023.
57	Karanastasis A A, Safin V, Pitet L M. Bio-based upcycling of poly(ethylene terephthalate) waste for the preparation of high-performance thermoplastic copolyesters[J]. Macromolecules, 2022, 55(3): 1042-1049.
58	Benvenuta Tapia J J, Tenorio-López J A, Martínez-Estrada A, et al. Application of RAFT-synthesized reactive tri-block copolymers for the recycling of post-consumer R-PET by melt processing[J]. Materials Chemistry and Physics, 2019, 229: 474-481.
59	Yang J Q, Li Z L, Xu Q Y, et al. Towards carbon neutrality: sustainable recycling and upcycling strategies and mechanisms for polyethylene terephthalate via biotic/abiotic pathways[J]. Eco-Environment & Health, 2024, 3(2): 117-130.

回收方法	催化剂	主产物	文献
光催化	CdS/CdO _x	甲酸、乙酸酯、乳酸、H₂	[60]
	Pt/g-C₃N₄	甲酸、H₂	[61]
	CN _x /Ni₂P	醋酸、甲酸、乙醇酸、乙二醛、H₂	[66]
	d-NiPS₃/CdS	甲酸酯、乙酸、乙醇酸、H₂	[67]
	MoS₂/Cd _x Zn_1-_x S	甲酸盐、乙醇酸盐甲基乙二醛、H₂	[68]
	碳化量子点/g-C₃N₄	乙醇酸、乙醇醛、乙醇、H₂	[69]
	g-C₃N₄-CNTs-NiMo	乙二醛、乙醇酸盐、H₂	[70]
电催化	AuNi(OH)₂	乙醇酸、H₂	[63]
	CoNi _x P/NF	二甲酸钾、TPA、H₂	[71]
	Pt₁/Ni(OH)₂	二甲酸钾、TPA、H₂	[72]
	Pd₆₇Ag₃₃合金气凝胶	甲酸、乙醇酸、H₂	[73]
	NiCu/NF	甲酸盐、H₂	[74]
	NiCo₂O₄、SnO₂	甲酸、H₂	[75]
氢解	Ru-PNN配合物	TPA、EG	[76]
	膦-二胺配体的Ru配合物	TPA、EG	[77]
	基于氮杂环卡宾的钳形锰催化剂	TPA、EG	[78]
	CoMo@NC	TPA、EG	[79]

回收方法	催化剂	主产物	文献
光催化	CdS/CdO _x	甲酸、乙酸酯、乳酸、H₂	[60]
	Pt/g-C₃N₄	甲酸、H₂	[61]
	CN _x /Ni₂P	醋酸、甲酸、乙醇酸、乙二醛、H₂	[66]
	d-NiPS₃/CdS	甲酸酯、乙酸、乙醇酸、H₂	[67]
	MoS₂/Cd _x Zn_1-_x S	甲酸盐、乙醇酸盐甲基乙二醛、H₂	[68]
	碳化量子点/g-C₃N₄	乙醇酸、乙醇醛、乙醇、H₂	[69]
	g-C₃N₄-CNTs-NiMo	乙二醛、乙醇酸盐、H₂	[70]
电催化	AuNi(OH)₂	乙醇酸、H₂	[63]
	CoNi _x P/NF	二甲酸钾、TPA、H₂	[71]
	Pt₁/Ni(OH)₂	二甲酸钾、TPA、H₂	[72]
	Pd₆₇Ag₃₃合金气凝胶	甲酸、乙醇酸、H₂	[73]
	NiCu/NF	甲酸盐、H₂	[74]
	NiCo₂O₄、SnO₂	甲酸、H₂	[75]
氢解	Ru-PNN配合物	TPA、EG	[76]
	膦-二胺配体的Ru配合物	TPA、EG	[77]
	基于氮杂环卡宾的钳形锰催化剂	TPA、EG	[78]
	CoMo@NC	TPA、EG	[79]

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