Plastics are integral to numerous significant social advancements.Nonetheless,their contribution to environmental pollution and climate crises cannot be disregarded,as their negative impact on the environment increase...Plastics are integral to numerous significant social advancements.Nonetheless,their contribution to environmental pollution and climate crises cannot be disregarded,as their negative impact on the environment increases with incremental production capacity and demand.Concerted global action is urgently required to promote the green recycle of plastics to prevent their accumulation in the environment and mitigate carbon emissions.This review aims to reveal the paths of green development for polyester plastics,incorporating the trends of the green revolution in mature commercial polyester plastics,newly emerging biodegradable polyester plastics,and future polyester plastics.A critical discussion was conducted on the current and potential future research areas from multiple perspectives,including raw materials,processes,and recycling,to propel us into a future marked by sustainability.展开更多
Waste plastics are serious environmental threats due to their low degradability and low recycling rate.Rapid and efficient waste plastics recycling technologies are urgently demanded for a sustainable future.Herein,we...Waste plastics are serious environmental threats due to their low degradability and low recycling rate.Rapid and efficient waste plastics recycling technologies are urgently demanded for a sustainable future.Herein,we report a rapid,closed-loop,and streamlined process to convert polyesters such as poly(ethylene terephthalate)(PET)back to its purified monomers.Using trifluoromethanesulfonic acid or metal triflates as the recyclable catalyst,polyesters such as PET can be completely depolymerized by simple carboxylic acids within 1 h.By coupling this acidolysis with a subsequent hydrogenolysis process,the consumed carboxylic acid was recovered and the closed-loop of PET depolymerization could be established.All catalysts and depolymerization agents are fully recycled while only PET and hydrogen are consumed.展开更多
The recycling of plastic waste has attracted increasing attention because of its negative effects on the ecological environment and human health.Photoreforming is emerging as a green and promising approach for upcycli...The recycling of plastic waste has attracted increasing attention because of its negative effects on the ecological environment and human health.Photoreforming is emerging as a green and promising approach for upcycling plastic waste into highly valuable chemicals and H_(2)fuels.Herein,an earth-abun-dant Ni_(2)P/ZnIn_(2)S_(4)catalyst prepared by mechanical grinding is reported to selectively photoreform various polyester plastics into high-added-value chemicals coupled with H_(2)evolution under mild conditions.In particular,polylactic acid(PLA)can be upcycled to pyruvic acid(PA)with high activity(745.9μmol g^(−1)h^(−1))and selectivity(>90%).Moreover,the H_(2)evolution rate can reach up to 781.3μmol g^(−1)h^(−1)catalyzed by 7.5 wt%Ni_(2)P/ZnIn_(2)S_(4).This system exhibits excellent photocatalytic performance,benefiting from efficient photogenerated charge carrier separation and transfer between Ni_(2)P and ZnIn_(2)S_(4).This study provides a viable and promising solution for simultaneously producing high-purity H_(2)and added-value chemicals from polyester plastic waste,demonstrating its potential for practical recycling applications.展开更多
The accumulation of waste plastics presents a severe environmental challenge.Among plastics,polyester plastics featured with ester-rich backbones are particularly promising for chemicalrecycling into valuable products...The accumulation of waste plastics presents a severe environmental challenge.Among plastics,polyester plastics featured with ester-rich backbones are particularly promising for chemicalrecycling into valuable products.Recently,artificial photosynthesis,one of the well-knownchemical methods for plastic disposal,has emerged and been devoted to convert the waste intowealth through partial oxidation of plastic substrates under mild conditions.In this review,weelaborate on various pathways of polyester plastic conversion,including polyester plasticupcycling integrated with water splitting,polyester valorization coupled with CO_(2)reduction,and organonitrogen synthesis from polyester.This review begins by discussing the fundamentalmechanisms of photoinduced plastic conversion as well as its advantages compared withtraditional plastic disposal and biological treatment approaches.We then outline the designprinciples for the development of high-performance photocatalysts,such as tuning redoxpotentials,promoting charge separation,enhancing substrate absorption and leveragingphotothermal-assisted photocatalysis.Furthermore,we summarize the recent advances in plasticconversion and the underlying mechanisms.In addition,techno-economic assessment and lifecycle assessment are used to evaluate the economic viability and environmental impact ofsolar-driven plastic upcycling,respectively.Finally,future challenges and research perspectives,such as photocatalyst screening,reactor design and the synthesis of multicarbon compounds,arecritically discussed.This review presents a blueprint for the development of advancedphotocatalysts for polyester plastic conversion,thereby closing the carbon loop forpostconsumer polyester plastics.展开更多
基金support by the National Natural Science Foundation of China(21901249)the Taishan Scholars Program of Shandong Province(tsqn201812112)the Scientific Research and Innovation Fund Project of the Shandong Energy Research Institute(SEI I202004).
文摘Plastics are integral to numerous significant social advancements.Nonetheless,their contribution to environmental pollution and climate crises cannot be disregarded,as their negative impact on the environment increases with incremental production capacity and demand.Concerted global action is urgently required to promote the green recycle of plastics to prevent their accumulation in the environment and mitigate carbon emissions.This review aims to reveal the paths of green development for polyester plastics,incorporating the trends of the green revolution in mature commercial polyester plastics,newly emerging biodegradable polyester plastics,and future polyester plastics.A critical discussion was conducted on the current and potential future research areas from multiple perspectives,including raw materials,processes,and recycling,to propel us into a future marked by sustainability.
基金provided by the National Natural Science Foundation of China(Grant No.21673141)ShanghaiTech University start-up fundingsupport from the Analytical Instrumentation Center(Grant No.SPST-AIC10112914),SPST,ShanghaiTech University,for compound characterization
文摘Waste plastics are serious environmental threats due to their low degradability and low recycling rate.Rapid and efficient waste plastics recycling technologies are urgently demanded for a sustainable future.Herein,we report a rapid,closed-loop,and streamlined process to convert polyesters such as poly(ethylene terephthalate)(PET)back to its purified monomers.Using trifluoromethanesulfonic acid or metal triflates as the recyclable catalyst,polyesters such as PET can be completely depolymerized by simple carboxylic acids within 1 h.By coupling this acidolysis with a subsequent hydrogenolysis process,the consumed carboxylic acid was recovered and the closed-loop of PET depolymerization could be established.All catalysts and depolymerization agents are fully recycled while only PET and hydrogen are consumed.
基金support from the National Key Research and Development Program of China(2022YFB3803600)the Natural Science Foundation of China(21773275 and 21971250)+1 种基金support from the CAS-Croucher Funding Scheme for Joint LaboratoriesF.L.thanks the Project funded by China Postdoctoral Science Foundation(2022M723227).
文摘The recycling of plastic waste has attracted increasing attention because of its negative effects on the ecological environment and human health.Photoreforming is emerging as a green and promising approach for upcycling plastic waste into highly valuable chemicals and H_(2)fuels.Herein,an earth-abun-dant Ni_(2)P/ZnIn_(2)S_(4)catalyst prepared by mechanical grinding is reported to selectively photoreform various polyester plastics into high-added-value chemicals coupled with H_(2)evolution under mild conditions.In particular,polylactic acid(PLA)can be upcycled to pyruvic acid(PA)with high activity(745.9μmol g^(−1)h^(−1))and selectivity(>90%).Moreover,the H_(2)evolution rate can reach up to 781.3μmol g^(−1)h^(−1)catalyzed by 7.5 wt%Ni_(2)P/ZnIn_(2)S_(4).This system exhibits excellent photocatalytic performance,benefiting from efficient photogenerated charge carrier separation and transfer between Ni_(2)P and ZnIn_(2)S_(4).This study provides a viable and promising solution for simultaneously producing high-purity H_(2)and added-value chemicals from polyester plastic waste,demonstrating its potential for practical recycling applications.
基金supported by the National Natural Science Foundation of China(Grant Nos.22378208 and 22302095)the Fundamental Research Funds for the Central Universities(Grant No.KJYQ2025013)+1 种基金the Talent Project of Fuyang Normal University(Grant No.2025KYQD0090)the Open Research Fund of Songshan Lake Materials Laboratory(Grant No.2023SLABFN17).
文摘The accumulation of waste plastics presents a severe environmental challenge.Among plastics,polyester plastics featured with ester-rich backbones are particularly promising for chemicalrecycling into valuable products.Recently,artificial photosynthesis,one of the well-knownchemical methods for plastic disposal,has emerged and been devoted to convert the waste intowealth through partial oxidation of plastic substrates under mild conditions.In this review,weelaborate on various pathways of polyester plastic conversion,including polyester plasticupcycling integrated with water splitting,polyester valorization coupled with CO_(2)reduction,and organonitrogen synthesis from polyester.This review begins by discussing the fundamentalmechanisms of photoinduced plastic conversion as well as its advantages compared withtraditional plastic disposal and biological treatment approaches.We then outline the designprinciples for the development of high-performance photocatalysts,such as tuning redoxpotentials,promoting charge separation,enhancing substrate absorption and leveragingphotothermal-assisted photocatalysis.Furthermore,we summarize the recent advances in plasticconversion and the underlying mechanisms.In addition,techno-economic assessment and lifecycle assessment are used to evaluate the economic viability and environmental impact ofsolar-driven plastic upcycling,respectively.Finally,future challenges and research perspectives,such as photocatalyst screening,reactor design and the synthesis of multicarbon compounds,arecritically discussed.This review presents a blueprint for the development of advancedphotocatalysts for polyester plastic conversion,thereby closing the carbon loop forpostconsumer polyester plastics.
