ACS Sustainable Chemistry & Engineering最新文献

{"title":"Tetrazolium Blue-Based Colorimetric Sensor for Hydrogen Gas","authors":"Deanna Fisher,&nbsp;, ,&nbsp;Mark Potter,&nbsp;, ,&nbsp;Pavan Mandapati,&nbsp;, ,&nbsp;Marcus W. Drover*,&nbsp;, ,&nbsp;Simon Rondeau-Gagné*,&nbsp;, and ,&nbsp;Bulent Mutus*,&nbsp;","doi":"10.1021/acssuschemeng.5c03394","DOIUrl":"https://doi.org/10.1021/acssuschemeng.5c03394","url":null,"abstract":"<p >Hydrogen gas (H_2(g)) is a viable alternative to current fossil fuels due to its clean combustion, yielding water and energy. Although H_2(g) offers significant advantages as a renewable energy source, several factors impede its large-scale adoption: It is highly flammable and explosive and lacks odor. Therefore, if it is to be used as an alternative fuel source, then reliable and selective detection methods must be studied. The development of H_2(g) sensors is an ever-growing field, though current technologies are not without practical use and sensitivity limitations. In this work, we study a combination of the commercially available dye, nitrotetrazolium blue chloride (NTB), and a hydrogen-activating compound [{Ir(Cp*)(Cl)}₂(thbpym)](Cl)₂] (Cp* = C₅Me₅^–, thbpym = 4,4′,6,6′-tetrahydroxy-2,2′-bipyrimidine, IrCp*) as components of a H_2(g) detection gasochromic tape. When exposed to H_2(g), this mixture changes from pale yellow to deep blue/purple in either solution (enclosed in polydimethylsiloxane (PDMS)) or solid state (on paper), showing response times on the order of seconds. On exposure to varying H_2(g) concentrations, the sensor was additionally found to detect as little as 100 ppm of H_2(g), a value 400-fold lower than the lower flammability limit of H_2(g) (4%).</p>","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"13 37","pages":"15302–15310"},"PeriodicalIF":7.3,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145104050","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":"Designing the Ethylene Factory for Products of Carbon Dioxide Reduction: Techno-Economic and Life Cycle Assessments","authors":"Ariane SilveiraSbrice Pinto*,&nbsp;, ,&nbsp;Nalan Gulpinar,&nbsp;, ,&nbsp;Fang Liu,&nbsp;, ,&nbsp;Elizabeth A. Gibson,&nbsp;, ,&nbsp;Linsey Fuller,&nbsp;, and ,&nbsp;Philip Souter,&nbsp;","doi":"10.1021/acssuschemeng.4c10485","DOIUrl":"https://doi.org/10.1021/acssuschemeng.4c10485","url":null,"abstract":"<p >The global ethylene market is rapidly expanding, and as demand grows, emissions are projected to rise, underscoring the urgent need for sustainable technologies to mitigate its carbon footprint. An original manufacturing approach integrated carbon capture and utilization (CCU), esterification, and dehydration to explore the utilization of intermediate chemicals for a circular economy. Initially, CO₂ was reduced to formic acid via electrocatalysis. Subsequently, esterification with ethanol produced ethyl formate, which was thermally catalyzed into ethylene. Comprehensive techno-economic and life cycle assessments identified opportunities and bottlenecks in designing this novel supply chain. Despite high production costs ($4.79 ± 1.19/kg), the environmental performance was promising. The LCA indicated a low carbon footprint, with up to 86% of emissions falling below benchmark levels (average 0.88 ± 0.55 kg CO₂ eq/kg), whereas other burdens exhibited an inverse trend. An original framework combining TEA-LCA, sensitivity analysis (SA), and uncertainty analysis (UA) was applied to forecast variability effects on the net present value (NPV) and product carbon footprint (PCF). Wastewater treatment, auxiliary materials, and CCU were primary contributors to the PCF’s uncertainty, leading to up to 90%, 45%, and 35% of the total variance, respectively. Operational expenditures (OpEx) related to power and raw materials accounted for up to 90% of NPV uncertainty. In contrast, total capital investment (TCI) and revenue (product and green credits from emissions-trading schemes, ETS) together contributed less than 10%. Improvements in yield, optimization of downstream processes, economic incentives, and/or the creation of a market for industrial flue gases as extra revenues are still necessary to compensate for high production costs and enable the deployment of the proposed technology to mitigate global warming burdens from ethylene production. In a complex decision-making process, technology mapping, cutoffs to fit the readiness level, green certification identification, UA, and SA for a combined TEA -LCA were identified as essential steps to guide future developments.</p><p >Net-zero ecosystem diagram for designing a circular economy with a sustainable supply chain for ethylene production from CCU and intermediate chemicals.</p>","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"13 37","pages":"15257–15268"},"PeriodicalIF":7.3,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acssuschemeng.4c10485","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145104085","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}

{"title":"Employing Cu2O Particles for Oxidative Synthesis of Arylketones and Propargyl Amines under Visible Light","authors":"Mahima Gupta,&nbsp;, ,&nbsp;Vaibhav Pramod Charpe*,&nbsp;, ,&nbsp;Ashwini Vishwasrao Katkar,&nbsp;, ,&nbsp;Munusamy Shanmugam,&nbsp;, and ,&nbsp;Kuo Chu Hwang*,&nbsp;","doi":"10.1021/acssuschemeng.5c01308","DOIUrl":"https://doi.org/10.1021/acssuschemeng.5c01308","url":null,"abstract":"<p >We have established a visible-light-driven oxidative catalytic system to form hydroxyl-functionalized aryl ketones and propargyl amines using cuboctahedral Cu₂O particles as a recyclable photocatalyst in the presence of oxygen at room temperature. Here, the in situ-generated cuprous oxide particle–phenylacetylide complex serves as a key light-absorbing photocatalyst (λ_max = 465 nm). This simple reaction setup can be readily scaled up, achieving high yields and providing significant value to the pharmaceutical industry for synthesizing molecular drugs such as Pitofenone, Fenofibrate, Ciproxifan, and Pargyline. In addition, the green chemistry metrics and Eco Scale evaluations prove that the current protocol is a simple, mild, and acceptable green organic synthesis process. This work highlights the potential of Cu₂O cubooctahedrons as effective recyclable photocatalysts for organic transformations, reduces the generation of reaction wastes, and offers a promising approach for eco-friendly industrial applications.</p><p >Disclosing an efficient catalytic system to synthesize hydroxyl-functionalized arylketones and propargylamines via a reusable photocatalyst, promoting a sustainable and green methodology.</p>","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"13 38","pages":"15780–15791"},"PeriodicalIF":7.3,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acssuschemeng.5c01308","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145181304","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}

{"title":"Development of Sustainable Biocatalytic Furfurylamine Production in a Magnetic Field-Assisted Microfluidic Reactor","authors":"Marko Božinović,&nbsp;, ,&nbsp;Marjan Jereb,&nbsp;, ,&nbsp;Borut Šketa,&nbsp;, ,&nbsp;Aljaž Gaber,&nbsp;, ,&nbsp;Mojca Seručnik,&nbsp;, ,&nbsp;Janez Košmrlj,&nbsp;, and ,&nbsp;Polona Žnidaršič-Plazl*,&nbsp;","doi":"10.1021/acssuschemeng.5c04752","DOIUrl":"https://doi.org/10.1021/acssuschemeng.5c04752","url":null,"abstract":"<p >The increasing demand for furfurylamine (FA), a versatile biobased building block, necessitates the development of efficient and sustainable production processes. This study presents a continuous biocatalytic process for the amination of furfural (FUR) to FA, aligning with green chemistry principles and circular economy strategies. A systematic screening of ω-transaminases (ω-TAs) and amine donors identified <i>N</i>-His₆-ATA-wt and (<i>S</i>)-(−)-α-methylbenzylamine as the optimal pair, achieving a 96% FA gross yield within 30 min at equimolar substrate concentrations, surpassing previously reported ω-TA-based FA productions. To enable biocatalyst long-term use in continuous processes, the enzyme was covalently immobilized on synthesized and functionalized magnetite nanoparticles (MNPs) using glutaraldehyde (GA) as a cross-linker. At optimized immobilization conditions, 92.8% recovered activity was achieved with 80 mg enzyme/g dry MNPs and 2% (v/v) GA in a batch process. The immobilized biocatalyst was integrated into a custom 3D-printed magnetic field-assisted microreactor and evaluated in continuous-flow operation for 18 days. The system reached a maximum space-time yield of 1.07 g/(L h) and a total turnover number of 2.04 × 10⁷. These results, along with favorable green chemistry metrics, highlight the potential of this integrated approach─combining enzyme engineering, nanomaterials, and flow technology─for scalable and sustainable FA production.</p><p >A sustainable, continuous biocatalytic process of furfural bioamination to furfurylamine using immobilized enzymes in a magnetic field-assisted microreactor was developed.</p>","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"13 38","pages":"15887–15896"},"PeriodicalIF":7.3,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acssuschemeng.5c04752","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145181305","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}

{"title":"Sustainable Lignin Nanoparticles for Herbicide Delivery Systems: Preparation, Characterization, and Effects on Target and Nontarget Plants","authors":"Pedro H. C. de Lima,&nbsp;, ,&nbsp;Maria C. Shiroma Buri,&nbsp;, ,&nbsp;Rafaela S. Mendonça,&nbsp;, ,&nbsp;Gabriel M. Favara,&nbsp;, ,&nbsp;Érica R. Biscalchim,&nbsp;, ,&nbsp;Mariana M. L. H. Forini,&nbsp;, ,&nbsp;Luiz A. F. Cavalcante,&nbsp;, and ,&nbsp;Renato Grillo*,&nbsp;","doi":"10.1021/acssuschemeng.5c05651","DOIUrl":"https://doi.org/10.1021/acssuschemeng.5c05651","url":null,"abstract":"<p >Recent advances in nanoscience have reduced herbicide usage while maintaining crop yields, and sustainable materials, such as lignin, have emerged as promising nanocarriers for herbicide delivery. Spherical lignin nanoparticles (SLNPs) with atrazine (SLNPs_ATZ) were designed, characterized, and applied to nontarget and target plants in this work. SLNPs_ATZ displayed spherical shapes with sizes near 178 nm by dynamic light scattering (DLS), and 136 nm by nanoparticle tracking analysis (NTA), with a 74.2% loading efficiency and a 43.26% release percentage after 168 h. Chemical computational modeling revealed lower gap energies between atrazine and lignin, indicating strong carrier/bioactive interactions. Hydroponic experiments were conducted with butterhead lettuce with sublethal doses of atrazine (30 μg/L) for 28 days, and lettuce treated with SLNPs and SLNPs_ATZ showed no significant changes in root length/shoot area compared to the control. Lipid peroxidation and catalase (biochemical tests) showed significant differences between lettuce treated with atrazine and all other treatments. Gene expression of catalase-1 (CAT1) and GST6 genes indicated a possible stress tolerance in lettuce by SLNPs. Moreover, PER51 gene results indicated damage from SLNPs_ATZ and ATZ. Based on the weed control assessment, seeds/seedlings showed possible germination/development interference by SLNPs_ATZ. These findings highlight lignin as a sustainable molecule for developing nanocarriers with potential effects on gene expression and improved weed control.</p><p >Preparation, characterization, DFT-based interaction studies, and evaluation of sustainable lignin nanoparticles carrying atrazine in target and nontarget plants. Lignin nanoparticles are sustainable carriers for herbicide delivery and can exhibit distinct effects on target and nontarget plants.</p>","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"13 37","pages":"15460–15477"},"PeriodicalIF":7.3,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acssuschemeng.5c05651","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145104056","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}

{"title":"Catalyst Layers Subjected to Sequential Cation Exchange and Thermal Annealing for Efficient and Durable Proton Exchange Water Electrolysis","authors":"Shuheng Zhang,&nbsp;, ,&nbsp;Linghan Lan,&nbsp;, ,&nbsp;Yuyang Wang,&nbsp;, ,&nbsp;Jian Huang*,&nbsp;, ,&nbsp;Fang Chen,&nbsp;, ,&nbsp;Jun Li,&nbsp;, ,&nbsp;Dingding Ye,&nbsp;, ,&nbsp;Liang Zhang,&nbsp;, ,&nbsp;Xun Zhu,&nbsp;, and ,&nbsp;Qiang Liao,&nbsp;","doi":"10.1021/acssuschemeng.5c04830","DOIUrl":"https://doi.org/10.1021/acssuschemeng.5c04830","url":null,"abstract":"<p >The nonuniform spatial distribution of perfluorosulfonic acid (PFSA) ionomers in anode catalyst layers (ACLs) critically limits the performance and lifespan of proton exchange membrane water electrolyzers (PEMWEs) by decreasing utilization of the IrO₂ catalyst and impeding interfacial proton/electron conduction. In this study, a protocol is introduced for sequential cation exchange and thermal annealing (SCETA) to simultaneously optimize the chain rearrangement and spatial distribution of PFSA ionomers in ACLs. We used integrated characterization (including small-angle X-ray scattering, transmission electron microscopy, and liquid-phase atomic force microscopy) to demonstrate that SCETA facilitates the dissociation of PFSA ionomers from oversized aggregates while increasing the binding affinity of these ionomers to IrO₂ catalyst particles. This synergistic restructuring enables IrO₂ aggregates to be encapsulated by a homogeneous, conformal ultrathin PFSA film. These structural modifications establish continuous proton and electron conduction pathways while preserving the requisite porosity for gas and water transport. A treated ACL had a 43% lower proton transfer resistance (3.0 mΩ cm²) and a 49% higher electrical conductivity (0.91 S m^–1) than a conventional ACL (5.3 mΩ cm² and 0.61 S m^–1, respectively). A membrane electrode assembly (MEA) with the treated ACL achieved a current density of 3.5 A cm^–2 at 1.9 V (a 29.6% increase over that of a conventional MEA), surpassing the U.S. Department of Energy 2025 technical target, and a decay rate of 7.0 μV h^–1 at 1.5 A cm^–2 over 2000 h of operation. The proposed treatment is a scalable and cost-effective solution for manufacturing MEAs for highly efficient PEMWE systems with long-term operation.</p>","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"13 37","pages":"15363–15371"},"PeriodicalIF":7.3,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145104088","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":"Structure–Activity Relationship between Quantitative Regulation of Perovskite Quantum Dot Band Gaps and Adsorption–Catalytic Performance in Lithium–Sulfur Batteries","authors":"Renjing Duan,&nbsp;, ,&nbsp;Xiaoshi Lang*,&nbsp;, ,&nbsp;Lan Li,&nbsp;, ,&nbsp;Tingting Qu,&nbsp;, ,&nbsp;Jianbin Li,&nbsp;, ,&nbsp;Chuangang Yao,&nbsp;, and ,&nbsp;Kedi Cai*,&nbsp;","doi":"10.1021/acssuschemeng.5c05919","DOIUrl":"https://doi.org/10.1021/acssuschemeng.5c05919","url":null,"abstract":"<p >The commercialization of lithium–sulfur batteries is limited by the shuttle effect of lithium polysulfides (LiPSs) and sluggish conversion kinetics. Perovskite quantum dots (PQDs) with their precisely tunable band gap (<i>E</i>_g) can provide a novel pathway for regulating the performance of catalytic systems in lithium–sulfur batteries. In this study, the band gap width of CsPbCl_3–<i>x</i>Br_<i>x</i> quantum dots is adjusted by controlling the doping amount of Br^–, and the PTI-CsPbCl_3–<i>x</i>Br_<i>x</i> composite is constructed by combining them with polyaniline-modified TiO₂ (PTI). Electrochemical tests and density of states calculations confirm that the material achieves optimal adsorption–catalytic performance for LiPSs when <i>E</i>_g is regulated to 1.47 eV. At this point, the interfacial built-in electric field strength of the composite can reach 1.72 V, and the reaction activation energy decreases to 0.087 eV with a lower d-band center (2.10 eV) and a narrower d-p energy gap (3.29 eV). These characteristics collectively promote the conversion kinetics between active sites and LiPSs, as well as the deposition/decomposition process of Li₂S. In addition, the PTI-CsPbCl₂Br₁/S composite cathode based on this optimized band gap system exhibits an average capacity decay rate of only 0.077% per cycle at 0.5 C under harsh operating conditions of lean electrolyte (5 μL·mg^–1) and high sulfur loading (6 mg·cm^–2).</p>","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"13 37","pages":"15547–15561"},"PeriodicalIF":7.3,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145104057","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":"Optimizing Biogenic Silica Recovery from Diatoms: A Life Cycle Analysis of Surfactant and Bleach Treatments","authors":"Sumit Dhali*,&nbsp;, ,&nbsp;Farah Naaz,&nbsp;, ,&nbsp;Anushree Malik,&nbsp;, ,&nbsp;Satyawati Sharma,&nbsp;, ,&nbsp;Ramesh Raliya,&nbsp;, and ,&nbsp;Thilini U. Ariyadasa,&nbsp;","doi":"10.1021/acssuschemeng.5c05457","DOIUrl":"https://doi.org/10.1021/acssuschemeng.5c05457","url":null,"abstract":"<p >The conventional acid and thermal treatments used for frustule recovery from diatom biomass are hazardous and unsustainable and may distort frustule structure. This is the first study to employ diatoms cultivated in domestic reverse osmosis reject wastewater for mesoporous biogenic silica production by investigating sustainable extraction routes using various surfactant types and bleach treatments at different concentrations. The highest organic matter removal of 81.68 ± 0.58% (w/w) was attained with a 4% (v/v) bleach treatment, while an 8% (v/v) anionic surfactant treatment yielded an organic matter removal of 81.62 ± 0.36% (w/w). The results have been confirmed through Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis, field emission scanning electron microscopy, energy-dispersive spectroscopy, carbon–hydrogen–nitrogen analysis, and Brunauer–Emmett–Teller analysis. FTIR peaks at 1109 cm^–1, 1101 cm^–1, and 3437 cm^–1 indicated silica in the extracted frustule. The bleach-treated frustules had mesoporous structure, exhibiting −17.6 ± 0.9 mV, 19 m² g^–1, and 31.99 ± 0.5 nm of surface charge, surface area, and average pore diameter, respectively. Life cycle assessment indicated that the bleach-cleaning process reduced the environmental impact by 99% compared to conventional acid treatment. Hence, this study presents a sustainable approach for extracting biogenic silica from diatoms, offering a greener alternative to conventional methods and reducing reliance on synthetic mesoporous silica.</p>","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"13 37","pages":"15447–15459"},"PeriodicalIF":7.3,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145104064","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":"Green and Sustainable Production of Baphicacanthus cusia Extracts and Their Dyeing Effect and Wound-Healing Ability","authors":"Chang-Wei Zhang,&nbsp;, ,&nbsp;Jian-Zhong Ye,&nbsp;, ,&nbsp;Xing-Ying Xue,&nbsp;, ,&nbsp;Wen-Jun Li*,&nbsp;, ,&nbsp;Hong-Xia Chen,&nbsp;, and ,&nbsp;Cheng-Zhang Wang*,&nbsp;","doi":"10.1021/acssuschemeng.5c06832","DOIUrl":"https://doi.org/10.1021/acssuschemeng.5c06832","url":null,"abstract":"<p ><i>Baphicacanthus cusia</i> (<i>B. cusia</i>) was traditionally used as raw material to prepare indigo naturalis; however, many factories have been shut down by local governments on account of their serious pollution contributions. In this study, a green and sustainable production of <i>B. cusia</i> leaf extracts is proposed. Namely, new indigo extract (NIE) and phenolic acid extract (PAE) were produced in an integrated fashion by enzyme transformation coupled membrane separation and freeze-drying technologies. The small-scale process was optimized, and its feasibility was verified by a pilot experiment. Moreover, the physicochemical properties, dyeing effect, and wound-healing ability of the two extracts were systematically evaluated. The NIE could be obtained within 1 day and exhibited more than 20 times the indigo content and 1.8 times the pure indigo yield than indigo naturalis. Moreover, the NIE showed superior dye-uptake rate and washing and rubbing fastness on pure cotton poplin compared with natural indigo from India. The PAE exhibited excellent broad spectrum antibacterial activities, especially <i>S. aureus</i> (IC₅₀ = 32 μg/mL). Significantly, the PAE had no toxicity and presented over 98% of the wound-healing rate on mice by increasing their collagen fiber content. All of above work is of great significance for the extension and sustained healthy development of a <i>B. cusia</i> industry chain.</p>","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"13 37","pages":"15671–15681"},"PeriodicalIF":7.3,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145104063","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":"Superior Metal–Support Interactions in Reliable Pt Catalysts for Carbon-Free Proton Exchange Membrane Fuel Cell Cathodes","authors":"Jisu Kim,&nbsp;, ,&nbsp;Moonsu Kim,&nbsp;, ,&nbsp;Seungjun Lee,&nbsp;, ,&nbsp;Minkyu Kim,&nbsp;, ,&nbsp;Jungwoo Park,&nbsp;, ,&nbsp;Jihyeon Kim,&nbsp;, ,&nbsp;Yongsug Tak*,&nbsp;, and ,&nbsp;Gibaek Lee*,&nbsp;","doi":"10.1021/acssuschemeng.5c05658","DOIUrl":"https://doi.org/10.1021/acssuschemeng.5c05658","url":null,"abstract":"<p >This study explored the enhancement of TiO₂ support materials in proton exchange membrane fuel cells (PEMFCs) through Nb and Si codoping, intending to achieve breakthrough electrocatalytic performance while avoiding carbon corrosion vulnerabilities. Nb, Si co-doped TiO₂ (NSTO) was engineered to improve the physicochemical properties and electrocatalytic effectiveness, surpassing Nb-doped TiO₂ (NTO) and carbon-infused systems. Silicon doping modifies the electronic band structure and enhances the surface chemistry, significantly improving the strong metal–support interaction and oxygen vacancy concentration, resulting in enhanced electrical conductivity and robust stability of NSTO. This leads to strengthened interaction with platinum and enhanced oxygen reduction reaction performance. Initial evaluations show that NSTO provides superior durability and catalytic efficiency compared to commercial Pt/C without the risks associated with carbon corrosion. Results of single-stack cell tests under various conditions demonstrate promising performance without degradation of the electrochemical activity after 10,000 accelerated degradation testing (ADT) cycles in half-cell tests and in single-stack cell tests after 5,000 ADT cycles. Our research substantiates the potential of NSTO as a superior support material for PEMFCs, paving the way for sustainable advancements in fuel cell technologies.</p>","PeriodicalId":25,"journal":{"name":"ACS Sustainable Chemistry & Engineering","volume":"13 37","pages":"15478–15492"},"PeriodicalIF":7.3,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145104001","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}