Wenlong Zhu, Yang Wang, Shuai Tong, Tao Wang, Hengxin Wang, Min Jia, Xiaohong Yan, Xiaoyu Zhang
{"title":"Compositional Doping Induced the Suppression of Sluggish Na+ Diffusion for a Robust Pyrophosphate Cathode toward Exceptionally Long Cycle Life","authors":"Wenlong Zhu, Yang Wang, Shuai Tong, Tao Wang, Hengxin Wang, Min Jia, Xiaohong Yan, Xiaoyu Zhang","doi":"10.1021/acssuschemeng.5c00760","DOIUrl":"https://doi.org/10.1021/acssuschemeng.5c00760","url":null,"abstract":"Polyanionic compounds are now viewed as attractive cathode materials for sodium-ion batteries (SIBs), which could be utilized broadly in large-scale energy storage equipment, especially for grid application, due to their high safety and outstanding thermal stability upon long-term cycling. Fe-based polyanionic compounds, especially Na<sub>2</sub>FeP<sub>2</sub>O<sub>7</sub>, are considered promising cathode materials due to the benefits of polyanionic compounds and the further advantage of earth-abundant Fe elements, which can lead to a low cost that facilitates the scaling of the sodium-ion industry. However, issues such as low electronic conductivity and poor cyclic durability, especially under high current density, remain substantial barriers that hinder their wide application. Herein, a carbon-coated Mg- and Ti-codoped Na<sub>2</sub>Fe<sub>0.95</sub>(MgTi)<sub>0.05</sub>P<sub>2</sub>O<sub>7</sub> cathode material is prepared, with significantly improved rate ability and cycling performance ascribed to the synergistic effect of the compositional doping strategy. Electrochemical tests show that Na<sub>2</sub>Fe<sub>0.95</sub>(MgTi)<sub>0.05</sub>P<sub>2</sub>O<sub>7</sub> exhibits exceptionally long cycle life at a high current density of 20C with 80.93% capacity retention after 30,000 cycles. In situ XRD and X-ray absorption fine structure (XAFS) spectra disclose that Mg and Ti codoping could effectively stabilize the structure with mere lattice distortion and the barely changed local structure environment during Na extraction/insertion, thus leading to the noteworthy ultralong cycle life. A theoretical study using the DFT calculation method demonstrates that the remarkable electrochemical property can be attributed to the large improvement of the conductivity and dramatic reduction of Na<sup>+</sup> diffusion barriers for Na<sub>2</sub>Fe<sub>0.95</sub>(MgTi)<sub>0.05</sub>P<sub>2</sub>O<sub>7</sub>. This study provides insightful perspectives on material design for polyanionic compounds and also inspires an innovative approach for the improvement of high-performance SIB cathode materials.","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"3 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144146254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Enhanced Hydrodeoxygenation Selectivity of Fatty Acid over FeReOx/CeO2 Catalyst to Produce Fatty Alcohols and Alkanes","authors":"Shiyu Wu, Xincheng Cao, Peng Liu, Jiaping Zhao, Jianchun Jiang, Junming Xu","doi":"10.1021/acssuschemeng.5c02270","DOIUrl":"https://doi.org/10.1021/acssuschemeng.5c02270","url":null,"abstract":"The selective hydrogenation of natural oils to produce fatty alcohols is a key process for synthesizing liquid alkanes and high-value chemicals. However, the development of catalysts capable of enhancing hydrodeoxygenation (HDO) selectivity while suppressing carbon–carbon (C–C) bond cleavage to minimize carbon loss remains a significant challenge. In this study, a FeReO<sub><i>x</i></sub>/CeO<sub>2</sub> catalyst was developed, which was characterized by high selectivity to octadecanol (93.8%, 210 °C) and liquid alkanes from stearic acid under mild conditions. Notably, the FeReO<sub><i>x</i></sub>/CeO<sub>2</sub> catalyst exhibited a higher hydrodeoxygenation selectivity in the production of liquid alkanes than decarboxylation (DCO) (C<sub>18</sub>: 84.2% vs C<sub>17</sub>: 15.8% at 240 °C). Detailed characterization of the FeReO<sub><i>x</i></sub>/CeO<sub>2</sub> catalyst revealed that excellent catalytic activity originated from the synergistic interaction between Fe and ReO<sub><i>x</i></sub>. The introduction of ReO<sub><i>x</i></sub> not only enhanced the adsorption of stearic acid but also improved the dispersion of metallic Fe. The weak acidity of metallic Fe could inhibit the cleavage of the C–C bond to a certain extent to obtain alkane products with high hydrodeoxygenation selectivity. Furthermore, the catalyst exhibited strong stability without significant deactivation after five cycles.","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"83 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144146253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"In Situ Modification of Sulfur-Based Cathode Electrolyte Interphases for Boosting Zinc/Graphite Dual-Ion Batteries via Vinylene Carbonate Additive and Dipropylene Glycol Methyl Ether/Water Mixed Solvent","authors":"Yitao He, Xiaoxiang Shen, Jiří Červenka","doi":"10.1021/acssuschemeng.5c01897","DOIUrl":"https://doi.org/10.1021/acssuschemeng.5c01897","url":null,"abstract":"Dual-ion batteries (DIBs) have been extensively explored due to their low material costs, high power density, and eco-friendly characteristics. However, the graphite cathode often leads to structural damage and instability at the electrode/electrolyte interface, severely diminishing its electrochemical performance. This work presents a cost-effective approach from the perspective of electrolyte optimization to overcome these challenges. By incorporating a moderate amount (5 wt %) of vinylene carbonate (VC) as an additive into a mixed solvent of dipropylene glycol methyl ether (DPM) and water, significant improvements in electrochemical performance are achieved, primarily due to the formation of a sulfur-rich cathode electrolyte interface (CEI) on the graphite surface and the electrolyte additive fostering the generation of nanosized sulfide particles in the graphite lattice, which provide active storage sites for anions. In the graphite-Zn DIB, a high discharge-specific capacity of 140 mAh g<sup>–1</sup> was achieved at 100 mA g<sup>–1</sup>, and after 500 cycles, the capacity retention rate is 84.2%, which is much higher than that of the battery without VC. This work demonstrates the potential of a cost-effective electrolyte in optimizing the composition of the graphite cathode CEI and promoting the formation of inorganic nanoparticle hosts on the graphite cathode surface for enhancing the performance of DIBs.","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"33 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144146311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tingting Chen, Yimeng Zhou, Menghan Guo, Jie Ding, Qin Zhong
{"title":"Highly Selective Hydrogenation-Acetalization Over a Bifunctional Cu–Mn Catalyst for the Green Synthesis of DEE","authors":"Tingting Chen, Yimeng Zhou, Menghan Guo, Jie Ding, Qin Zhong","doi":"10.1021/acssuschemeng.5c01908","DOIUrl":"https://doi.org/10.1021/acssuschemeng.5c01908","url":null,"abstract":"1,1-Diethoxyethane (DEE), widely used in various industries, is primarily synthesized via ethanol-acetaldehyde condensation, but acetaldehyde’s toxicity and storage issues hinder its industrial application, urgently necessitating the development of green and efficient alternative synthetic pathways. In this study, the Cu/MnO catalyst was employed for the hydrogenation-acetalization of diethyl oxalate (DEO) to synthesize DEE, not only achieving a green synthesis pathway but also addressing the issue of ethylene glycol (EG) overproduction from DEO, thereby enabling efficient resource integration and utilization. Results showed that the DEO conversion reached 100%, and the DEE selectivity reached 99%. Characterizations showed that the DEO-to-DEE reaction contains three sequential reactions, including DEO hydrogenation into EG over the Cu site, the intramolecular dehydration of EG into acetaldehyde over the MnO site, and the acetalization of acetaldehyde and ethanol over the MnO site. Particularly, the strong electronic interactions between Cu and MnO facilitate EG into DEE. This study underscores the significant potential of Cu–Mn catalysts in the selective transformation of DEO into the valuable compound, DEE.","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"9 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144130423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lorenz P. Manker, Maxime A. Hedou, Roger Marti, Michael P. Shaver, Jeremy S. Luterbacher
{"title":"Additive-Enhanced PAX Polyesters for Industrial Processing and Increased Longevity","authors":"Lorenz P. Manker, Maxime A. Hedou, Roger Marti, Michael P. Shaver, Jeremy S. Luterbacher","doi":"10.1021/acssuschemeng.4c08640","DOIUrl":"https://doi.org/10.1021/acssuschemeng.4c08640","url":null,"abstract":"Biobased and degradable polyesters with high material performance are essential for short-term applications like packaging. However, enhancing degradability often leads to challenges such as instability during high-shear melt processing and premature degradation. Previously, we introduced a novel class of degradable polyesters, poly(alkylene xylosediglyoxylates) (PAX), which combine strength, ductility, thermal stability, and low gas permeability. However, PAX’s hydrophilicity and limited hydrolysis resistance cause significant degradation during air-exposed high-shear extrusion and short product lifetimes in warm water. In this study, we scaled up the synthesis of a key PAX polyester and addressed these challenges using extrusion-based additive engineering with a food-grade molecular weight chain extender (styrene-acrylate-glycidyl methacrylate copolymer) and an antihydrolysis agent (bis(2,6-diisopropylphenyl)carbodiimide). Adding 0.5 wt % of the chain extender improved molecular weight retention, thermomechanical properties, extrusion melt-strength, and processability. Additionally, the antihydrolysis agent doubled the material’s resistance to water-induced degradation. These strategies enable the production of PAX resin under industrial conditions, retaining the virgin material’s properties while extending and tuning its lifetime in water. This work demonstrates how additives can enhance the performance of new degradable polymers.","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"10 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144122633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lorenz P. Manker, Maxime A. Hedou, Roger Marti, Michael P. Shaver and Jeremy S. Luterbacher*,
{"title":"Additive-Enhanced PAX Polyesters for Industrial Processing and Increased Longevity","authors":"Lorenz P. Manker, Maxime A. Hedou, Roger Marti, Michael P. Shaver and Jeremy S. Luterbacher*, ","doi":"10.1021/acssuschemeng.4c0864010.1021/acssuschemeng.4c08640","DOIUrl":"https://doi.org/10.1021/acssuschemeng.4c08640https://doi.org/10.1021/acssuschemeng.4c08640","url":null,"abstract":"<p >Biobased and degradable polyesters with high material performance are essential for short-term applications like packaging. However, enhancing degradability often leads to challenges such as instability during high-shear melt processing and premature degradation. Previously, we introduced a novel class of degradable polyesters, poly(alkylene xylosediglyoxylates) (PAX), which combine strength, ductility, thermal stability, and low gas permeability. However, PAX’s hydrophilicity and limited hydrolysis resistance cause significant degradation during air-exposed high-shear extrusion and short product lifetimes in warm water. In this study, we scaled up the synthesis of a key PAX polyester and addressed these challenges using extrusion-based additive engineering with a food-grade molecular weight chain extender (styrene-acrylate-glycidyl methacrylate copolymer) and an antihydrolysis agent (bis(2,6-diisopropylphenyl)carbodiimide). Adding 0.5 wt % of the chain extender improved molecular weight retention, thermomechanical properties, extrusion melt-strength, and processability. Additionally, the antihydrolysis agent doubled the material’s resistance to water-induced degradation. These strategies enable the production of PAX resin under industrial conditions, retaining the virgin material’s properties while extending and tuning its lifetime in water. This work demonstrates how additives can enhance the performance of new degradable polymers.</p>","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"13 21","pages":"7710–7716 7710–7716"},"PeriodicalIF":7.1,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144189157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mechanoenzymatic Depolymerization of Polyethylene Terephthalate in Moist Solids: Exploring the Roller Mill","authors":"Ali Zaker, and , Karine Auclair*, ","doi":"10.1021/acssuschemeng.5c0233510.1021/acssuschemeng.5c02335","DOIUrl":"https://doi.org/10.1021/acssuschemeng.5c02335https://doi.org/10.1021/acssuschemeng.5c02335","url":null,"abstract":"<p >Plastic pollution has emerged as a critical global environmental challenge. Effective end-of-life management of plastics remains a pressing issue. Recent advances in enzymatic technology offer promising solutions for the closed-loop recycling of many plastics. For example, numerous enzymes capable of depolymerizing poly(ethylene terephthalate) (PET) into its building blocks have been identified. Notably, enzymatic hydrolysis conducted in moist-solid reaction mixtures is garnering interest as a more sustainable alternative to traditional dilute aqueous conditions. When combined with intermittent mechanical mixing, this approach, termed mechanoenzymology, can enhance enzyme performance, while addressing solubility issues and avoiding the need for substrate pretreatment. Despite these advances, current research in mechanoenzymology predominantly relies on laboratory-scale experiments using shaker mills. This study aims to broaden the scope of mechanoenzymatic transformations by exploring the use of a roller mill instead. Roller mills find widespread use industrially (e.g., in the mining and concrete industries). Utilizing commercial cutinase Novozym 51032 (abbreviated HiC), we investigated how varying milling conditions, moisture levels, and enzyme loadings impact the efficiency and scalability of PET depolymerization to terephthalic acid. The results demonstrate the scalability of enzymatic reactions in moist solids from 300 mg to 3 g and to 30 g scales at a solids loading of 40% w/w and daily milling at 300 rpm for 30 min. This study lays the groundwork for advancing PET recycling technologies on a larger scale.</p>","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"13 21","pages":"8093–8102 8093–8102"},"PeriodicalIF":7.1,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144189146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Carmen Martín, Maite Perfecto-Irigaray, Garikoitz Beobide, Elena Solana-Madruga, David Ávila-Brande, Marcos Laso-Quesada, Imanol de Pedro, Francisco A. Casado-Carmona, Rafael Lucena, Soledad Cardenas, Israel Cano
{"title":"Developing a Highly Efficient and Magnetically Recoverable Nanocatalyst for Glycolytic Depolymerization of Various Polyesters","authors":"Carmen Martín, Maite Perfecto-Irigaray, Garikoitz Beobide, Elena Solana-Madruga, David Ávila-Brande, Marcos Laso-Quesada, Imanol de Pedro, Francisco A. Casado-Carmona, Rafael Lucena, Soledad Cardenas, Israel Cano","doi":"10.1021/acssuschemeng.5c01220","DOIUrl":"https://doi.org/10.1021/acssuschemeng.5c01220","url":null,"abstract":"The synthesis of a new recyclable magnetic catalyst consisting of silica-coated magnetite nanoparticles (Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>) with a zinc-containing ionic liquid anchored to the surface is described. An in-depth characterization was performed using different techniques, which demonstrated that Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@(mim)[ZnCl(OH)<sub>2</sub>] (mim: methylimidazolium) depicts the actual structure of the nanocatalyst. This system exhibits an outstanding performance as a magnetically recoverable catalyst for the glycolysis of different polyesters in ethylene glycol, such as polyethylene terephthalate (PET), poly(1,4-butylene terephthalate) (PBT), and bisphenol A polycarbonate (BPA-PC). The depolymerization of PET and PBT into bis(2-hydroxyethyl)terephthalate (BHET) was carried out with nearly 100% selectivity and yield over 12 reaction cycles at 170 °C without tedious workup or purification processes. Similar behavior was observed in the glycolysis of BPA-PC into bisphenol A (BPA), which was obtained with more than 80% yield during 12 consecutive runs. Indeed, the nanocatalyst remained active with only a small loss of activity in the 20th cycle of recovery and reuse, demonstrating the high potential of this catalytic system for the chemical recycling of plastics. Besides, the unique catalytic and magnetic properties of this hybrid material have allowed us to develop gram-scale experiments. Finally, an in-depth characterization of the recovered catalyst showed that its overall structure was preserved after the glycolysis process. Only a loss of Cl<sup>–</sup> ions of the Zn-based ionic liquid, caused by a ligand exchange process with ethylene glycol species and OH<sup>–</sup> ions, was observed.","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"33 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144122634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mechanoenzymatic Depolymerization of Polyethylene Terephthalate in Moist Solids: Exploring the Roller Mill","authors":"Ali Zaker, Karine Auclair","doi":"10.1021/acssuschemeng.5c02335","DOIUrl":"https://doi.org/10.1021/acssuschemeng.5c02335","url":null,"abstract":"Plastic pollution has emerged as a critical global environmental challenge. Effective end-of-life management of plastics remains a pressing issue. Recent advances in enzymatic technology offer promising solutions for the closed-loop recycling of many plastics. For example, numerous enzymes capable of depolymerizing poly(ethylene terephthalate) (PET) into its building blocks have been identified. Notably, enzymatic hydrolysis conducted in moist-solid reaction mixtures is garnering interest as a more sustainable alternative to traditional dilute aqueous conditions. When combined with intermittent mechanical mixing, this approach, termed mechanoenzymology, can enhance enzyme performance, while addressing solubility issues and avoiding the need for substrate pretreatment. Despite these advances, current research in mechanoenzymology predominantly relies on laboratory-scale experiments using shaker mills. This study aims to broaden the scope of mechanoenzymatic transformations by exploring the use of a roller mill instead. Roller mills find widespread use industrially (e.g., in the mining and concrete industries). Utilizing commercial cutinase Novozym 51032 (abbreviated HiC), we investigated how varying milling conditions, moisture levels, and enzyme loadings impact the efficiency and scalability of PET depolymerization to terephthalic acid. The results demonstrate the scalability of enzymatic reactions in moist solids from 300 mg to 3 g and to 30 g scales at a solids loading of 40% w/w and daily milling at 300 rpm for 30 min. This study lays the groundwork for advancing PET recycling technologies on a larger scale.","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"137 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144122694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Carmen Martín*, Maite Perfecto-Irigaray, Garikoitz Beobide, Elena Solana-Madruga, David Ávila-Brande, Marcos Laso-Quesada, Imanol de Pedro, Francisco A. Casado-Carmona, Rafael Lucena, Soledad Cardenas and Israel Cano*,
{"title":"Developing a Highly Efficient and Magnetically Recoverable Nanocatalyst for Glycolytic Depolymerization of Various Polyesters","authors":"Carmen Martín*, Maite Perfecto-Irigaray, Garikoitz Beobide, Elena Solana-Madruga, David Ávila-Brande, Marcos Laso-Quesada, Imanol de Pedro, Francisco A. Casado-Carmona, Rafael Lucena, Soledad Cardenas and Israel Cano*, ","doi":"10.1021/acssuschemeng.5c0122010.1021/acssuschemeng.5c01220","DOIUrl":"https://doi.org/10.1021/acssuschemeng.5c01220https://doi.org/10.1021/acssuschemeng.5c01220","url":null,"abstract":"<p >The synthesis of a new recyclable magnetic catalyst consisting of silica-coated magnetite nanoparticles (Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>) with a zinc-containing ionic liquid anchored to the surface is described. An in-depth characterization was performed using different techniques, which demonstrated that Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@(mim)[ZnCl(OH)<sub>2</sub>] (mim: methylimidazolium) depicts the actual structure of the nanocatalyst. This system exhibits an outstanding performance as a magnetically recoverable catalyst for the glycolysis of different polyesters in ethylene glycol, such as polyethylene terephthalate (PET), poly(1,4-butylene terephthalate) (PBT), and bisphenol A polycarbonate (BPA-PC). The depolymerization of PET and PBT into bis(2-hydroxyethyl)terephthalate (BHET) was carried out with nearly 100% selectivity and yield over 12 reaction cycles at 170 °C without tedious workup or purification processes. Similar behavior was observed in the glycolysis of BPA-PC into bisphenol A (BPA), which was obtained with more than 80% yield during 12 consecutive runs. Indeed, the nanocatalyst remained active with only a small loss of activity in the 20th cycle of recovery and reuse, demonstrating the high potential of this catalytic system for the chemical recycling of plastics. Besides, the unique catalytic and magnetic properties of this hybrid material have allowed us to develop gram-scale experiments. Finally, an in-depth characterization of the recovered catalyst showed that its overall structure was preserved after the glycolysis process. Only a loss of Cl<sup>–</sup> ions of the Zn-based ionic liquid, caused by a ligand exchange process with ethylene glycol species and OH<sup>–</sup> ions, was observed.</p><p >A magnetically recoverable nanocatalyst with a zinc-containing ionic liquid anchored on the surface, Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@(mim)[ZnCl(OH)<sub>2</sub>], showed nearly 100% yield over 12–20 runs in polyesters glycolysis!</p>","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"13 21","pages":"7890–7903 7890–7903"},"PeriodicalIF":7.1,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acssuschemeng.5c01220","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144189145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}