ACS Applied Engineering Materials最新文献

{"title":"Graphitic Carbon Nitride: Achieving Superlow Friction and Wear on Engineering Steel","authors":"Lin Li,&nbsp;Tao Lin,&nbsp;Jie Sun,&nbsp;Hanjun Gong*,&nbsp;Yun Bai and Kai Gao*,&nbsp;","doi":"10.1021/acsaenm.4c0069610.1021/acsaenm.4c00696","DOIUrl":"https://doi.org/10.1021/acsaenm.4c00696https://doi.org/10.1021/acsaenm.4c00696","url":null,"abstract":"<p >Graphitic carbon nitride (g-C₃N₄) is a typical two-dimensional (2D) material acclaimed for its layered structure and electronic properties, showcasing promise across various domains such as catalysis, CO₂ reduction, and lubrication. In this study, g-C₃N₄ is synthesized as an oil-based nanoadditive within oleic acid (OA), exhibiting superlow friction coefficient (COF) within steel/steel contacts under high pressure. When dispersed g-C₃N₄ in OA at a concentration of 0.25 wt %, the COF is reduced from 0.077 to 0.022 compared to the base oil. The amino groups in g-C₃N₄ promote the formation of continuous friction films, creating a composite tribofilm made of carbon layers, carbon nitride, and iron oxides. This tribofilm effectively prevents direct contact between tribopairs, leading to significant friction reduction and enhanced antiwear properties. These findings offer insights into the design of lubricant additives for base oils and highlight the promising potential of carbon nitride in lubrication and tribology applications.</p>","PeriodicalId":55639,"journal":{"name":"ACS Applied Engineering Materials","volume":"3 1","pages":"171–177 171–177"},"PeriodicalIF":0.0,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143091068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recent Advances in Electrochemical Organic Waste Reforming: Highlights on Anodic Chemistry, Materials Design, and System Integration","authors":"Qiyuan Li,&nbsp;Denny Gunawan,&nbsp;Lixue Jiang,&nbsp;Rehan Gunawan,&nbsp;Gavesha Gunasekara,&nbsp;Sumaya Sarmin,&nbsp;Rachelle Doyle,&nbsp;Qiwen Lai,&nbsp;Rose Amal and Jason Scott*,&nbsp;","doi":"10.1021/acsaenm.4c0070510.1021/acsaenm.4c00705","DOIUrl":"https://doi.org/10.1021/acsaenm.4c00705https://doi.org/10.1021/acsaenm.4c00705","url":null,"abstract":"<p >As renewable electricity─particularly from solar energy─becomes more cost-effective, electrochemical organic waste reforming emerges as a promising solution for green hydrogen production. This approach also offers additional advantages in low-carbon waste management and the coproduction of value-added chemicals. However, its broader application has been limited, mainly due to gaps in the understanding of the complex properties of real mixed waste, reaction mechanisms, catalyst design, and system integration. This review provides a fresh perspective on the value of electrochemical reforming technology for both waste degradation and valorization. Initially, the suitability of various waste streams for electrochemical processes based on critical feedstock properties was examined. Subsequently, potential alternative anodic reactions for pollutant degradation and waste valorization to determine the optimal process pathways were screened. Finally, advanced catalysts, modules, and system designs to enhance techno-economic feasibility were explored. Overall, this review underscores the significant potential of electrochemical organic waste reforming for sustainable hydrogen production and waste management, offering insights into feasible pathways for commercializing the technology by addressing challenges related to waste feedstocks, catalysts, and systems.</p>","PeriodicalId":55639,"journal":{"name":"ACS Applied Engineering Materials","volume":"3 1","pages":"21–43 21–43"},"PeriodicalIF":0.0,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143091391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of Thin-Film Composite Membranes for Magnesium–Lithium Separation by Interface Polymerization of Linear Diamines and Piperazine as Aqueous Monomers","authors":"Xin Cheng,&nbsp;Yingying Shi,&nbsp;Qiaoming Pan*,&nbsp;Huifen Tan*,&nbsp;Keke Chen,&nbsp;Wenchao Liu,&nbsp;Xin Fu and Zixin Hao,&nbsp;","doi":"10.1021/acsaenm.4c0074110.1021/acsaenm.4c00741","DOIUrl":"https://doi.org/10.1021/acsaenm.4c00741https://doi.org/10.1021/acsaenm.4c00741","url":null,"abstract":"<p >This study investigates the effectiveness of thin-film composite (TFC) membranes prepared through interfacial polymerization (IP) using various linear diamines (LD) in conjunction with piperazine (PIP) to mitigate magnesium ion permeation. Among the tested LDs, 1,4-butylenediamine (BDA) was selected for further analysis due to its superior performance in TFC membrane fabrication. A systematic examination was conducted on the effects of varying BDA to PIP ratios and their concentrations on the separation efficiency of the TFC membranes. Characterization techniques, including attenuated total reflectance Fourier-transform infrared (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and atomic force microscopy (AFM), were employed to elucidate the structural characteristics and surface morphology of the membranes. The results show that longer LD carbon chains in the aqueous phase lead to higher molecular weight cutoff (MWCO) and a looser structure of the composite membranes. Furthermore, increasing BDA concentration slightly raises membrane MWCO but significantly enhances salt rejection performance due to stronger charge effects. By simulating the brine composition diluted 10 times from the Yiliping Salt Lake in Qinghai Province, China. A typical feed of high-magnesium (C_Mg²⁺ = 7500 mg/L) and high-magnesium-to-lithium ratio (Mg²⁺/Li⁺ = 28.42), the TFC membrane with an optimal BDA additive ratio achieved a remarkable S_Li,Mg of 31.66 along with a Mg²⁺ rejection rate of 96.34%, coupled with favorable water permeability properties. These findings underscore significant application potential for this membrane technology. Finally, we discuss the mechanisms by which LD interact during the IP process to influence both structure and properties of TFC membranes.</p>","PeriodicalId":55639,"journal":{"name":"ACS Applied Engineering Materials","volume":"3 1","pages":"243–255 243–255"},"PeriodicalIF":0.0,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143091562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"S-Scheme-Mediated NiCo2S4–P–g-C3N4 Heterojunction for Selective Nitrate Reduction to Ammonia","authors":"Rahul Gupta,&nbsp;Umair Alam,&nbsp;Raushan Kumar,&nbsp;Sushant Kumar and Nishith Verma*,&nbsp;","doi":"10.1021/acsaenm.4c0070710.1021/acsaenm.4c00707","DOIUrl":"https://doi.org/10.1021/acsaenm.4c00707https://doi.org/10.1021/acsaenm.4c00707","url":null,"abstract":"<p >Photocatalysis offers a promising avenue for the efficient removal of nitrate compounds from water by harnessing solar energy and transforming them to ammonia. The constraints, such as rapid charge carrier recombination and comparatively low selectivity, however, hinder the widespread application of the technology. In this study, an inexpensive bimetal sulfide (NiCo₂S₄, NCS) is anchored over the phosphorus (P)-doped g-C₃N₄ (PCN) sheets. The fabricated NCS-PCN heterojunction is tested for the photocatalytic nitrate-reduction activity. Notably, a dose of NCS-PCN composite with 30% (w/w) NCS shows an optimal nitrate reduction, achieving over 99% removal in 4 h, with ammonia selectivity increasing from ∼56 to 96%, compared to PCN alone under the identical conditions. The photocatalyst also shows remarkable stability, experiencing a marginal decrease of less than 1% in the activity after 5 reaction-regeneration cycles. The isotope labeling test using nuclear magnetic resonance spectroscopy confirms that nitrate salt supplied in the feedstock is the nitrogen source for ammonia formed during photoreduction. The observed enhanced activity, supported by radical scavenging tests, electronic paramagnetic resonance spectroscopy measurements, X-ray photoelectron spectroscopy, and in situ diffuse reflectance infrared Fourier transform spectroscopic analyses, provides evidence for the S-scheme-mediated charge transfer mechanism for the NCS-PCN heterojunction. This study not only contributes valuable insights into an efficient light-harvesting photocatalyst but also paves the way for sustainable nitrate-reduction processes on a large scale.</p>","PeriodicalId":55639,"journal":{"name":"ACS Applied Engineering Materials","volume":"3 1","pages":"187–201 187–201"},"PeriodicalIF":0.0,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143091177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spray Manufacturing Thermal Insulation Composites","authors":"Long Zhu,&nbsp;Taotao Meng,&nbsp;Jason N. Armstrong,&nbsp;Jun Zhang and Shenqiang Ren*,&nbsp;","doi":"10.1021/acsaenm.4c0075210.1021/acsaenm.4c00752","DOIUrl":"https://doi.org/10.1021/acsaenm.4c00752https://doi.org/10.1021/acsaenm.4c00752","url":null,"abstract":"<p >Cellulose-based thermal insulation materials present significant potential for modern green building applications due to their inherent carbon sequestration properties. However, traditional manufacturing of composites often results in the limited thermal insulation performance and embodied carbon footprint due to an increased density from material shrinkage and higher energy consumption during the water-based slurry drying process. Here, we report solvent spraying coupled with dry powder feedstock to manufacture highly porous silica/straw insulation composites. The manufactured composite exhibits negligible shrinkage with the density of 0.08 g/cm³, thermal conductivity of 27.8 mW/(m·K), flexural modulus of 3.1 MPa, and compressive modulus of 0.89 MPa. Additionally, the prepared composite demonstrates fire retardancy (burning rate of 0.5 mm/min) and recyclability (99%). This solvent-spraying strategy opens up opportunities of energy-efficient insulation materials for carbon-sequestration building sectors.</p>","PeriodicalId":55639,"journal":{"name":"ACS Applied Engineering Materials","volume":"3 1","pages":"266–274 266–274"},"PeriodicalIF":0.0,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143091458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Progress and Prospects of Chemical Functionalization of Textiles Via Nanotechnology","authors":"Md. Tanvir Hossain*,&nbsp;Selim Reza,&nbsp;Md. Ariful Islam,&nbsp;Md. Mohebbullah and Tarikul Islam*,&nbsp;","doi":"10.1021/acsaenm.4c0064410.1021/acsaenm.4c00644","DOIUrl":"https://doi.org/10.1021/acsaenm.4c00644https://doi.org/10.1021/acsaenm.4c00644","url":null,"abstract":"<p >Over the past decade, nanotechnology has gained considerable attention among academia and industry professionals, playing a pivotal role in advancing this sector. Chemical functionalization of textiles using nanotechnology has ushered in an era of advanced materials with superior properties and functionalities. This Review delves into the current progress and future prospects in this rapidly evolving field, focusing on key advancements such as antimicrobial properties, UV protection, self-cleaning capabilities, enhanced mechanical strength, and smart textiles. This Review provides a comprehensive overview of the past 15 years of advancements in functional textiles using nanotechnology. Several types of nanomaterials based on their dimensions and functionalities have been discussed and summarized. Fabrication techniques such as electrospinning, coating technologies, and printing methods have enabled the integration of nanomaterials into textiles, offering benefits like improved strength, durability, and functionality. While nanotechnology has brought about significant positive environmental impacts by enhancing textile properties and functionality, there are also concerns regarding potential adverse environmental impacts due to nanomaterial leaching. The Review highlights the collaborative efforts of academia and industry professionals in developing mitigation strategies and the exploration of biodegradable nanomaterials, which are being used to address these challenges, reassuring the audience of the industry.</p>","PeriodicalId":55639,"journal":{"name":"ACS Applied Engineering Materials","volume":"3 1","pages":"1–20 1–20"},"PeriodicalIF":0.0,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143090677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultraresponsive Donor–Acceptor System for Transforming Poly(lactic) Acid into Amino Acids with Visible Light","authors":"Rajat Singhal,&nbsp;Ripsa Rani Nayak,&nbsp;Satyam Singh*,&nbsp;Rajesh Kumar Yadav,&nbsp;Ravindra Vikram Singh and Navneet Kumar Gupta*,&nbsp;","doi":"10.1021/acsaenm.4c0059710.1021/acsaenm.4c00597","DOIUrl":"https://doi.org/10.1021/acsaenm.4c00597https://doi.org/10.1021/acsaenm.4c00597","url":null,"abstract":"<p >A photocatalytic, green, and cost-effective approach is the most promising pathway for the transformation of sustainable plastic waste, poly(lactic) acid (PLA). However, PLA degrades into carbon dioxide and water. This degradation process is slow and problematic, as it emits CO₂, causing global warming effects. Consequently, there is an urgent need to develop innovative strategies for upcycling PLA into lanthanide as an amino acid for protein formation. Therefore, we report the formation of an ultraresponsive donor–acceptor coupled system, i.e., ferrocene carboxaldehyde (FCaldh) covalently coupled with an amine-modified nanodiamond (ND)-based chromophore (FCaldhCND photocatalyst) for upcycling poly(lactic acid) into alanine. The FCaldh moiety served as an external light-harvesting component in the conjugated photocatalytic system. The donor–acceptor photocatalytic system (FCaldhCND) led to an amino acid (alanine) generation of 77% in comparison to constituents. This research study presents an attractive approach for upcycling PLA waste and opens avenues for the green synthesis of different types of amino acids.</p>","PeriodicalId":55639,"journal":{"name":"ACS Applied Engineering Materials","volume":"3 1","pages":"98–107 98–107"},"PeriodicalIF":0.0,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143089084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-Performance, Lead-Free Magnetoelectric Composites Based on Nickel–Cobalt Ferrite and Calcium/Zirconium-Substituted Barium Titanate","authors":"Abhijeet V. Dhotre,&nbsp;Shahaji P. Kharat,&nbsp;Tejas K. Jadhav,&nbsp;Jayashri R. Birajdar,&nbsp;Paul Gaurav Nalam,&nbsp;Ajit R. James,&nbsp;Yesh D. Kolekar* and C. V. Ramana,&nbsp;","doi":"10.1021/acsaenm.4c0067210.1021/acsaenm.4c00672","DOIUrl":"https://doi.org/10.1021/acsaenm.4c00672https://doi.org/10.1021/acsaenm.4c00672","url":null,"abstract":"&lt;p &gt;Herein we report on the synthesis, chemistry, and structure–property correlation of magnetoelectric (ME) composites, where the rare earth (RE) ion-substituted nickel–cobalt (Ni–Co) mixed ferrite serves as the magnetic phase and the Pb-free, Ca/Zr-doped BaTiO&lt;sub&gt;3&lt;/sub&gt; serves as the ferroelectric and piezoelectric phase. The magnetostrictive–piezoelectric ME composites with variable composition, namely, 0.9(BaZr&lt;sub&gt;0.04&lt;/sub&gt;Ti&lt;sub&gt;0.96&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt;)–0.1(Co&lt;sub&gt;0.9&lt;/sub&gt;Ni&lt;sub&gt;0.1&lt;/sub&gt;Fe&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;4&lt;/sub&gt;), 0.9(BaZr&lt;sub&gt;0.04&lt;/sub&gt;Ti&lt;sub&gt;0.96&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt;)–0.1(Co&lt;sub&gt;0.9&lt;/sub&gt;Ni&lt;sub&gt;0.1&lt;/sub&gt;Fe&lt;sub&gt;1.95&lt;/sub&gt;Dy&lt;sub&gt;0.05&lt;/sub&gt;O&lt;sub&gt;4&lt;/sub&gt;), 0.9(Ba&lt;sub&gt;0.92&lt;/sub&gt;Ca&lt;sub&gt;0.08&lt;/sub&gt;Zr&lt;sub&gt;0.04&lt;/sub&gt;Ti&lt;sub&gt;0.96&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt;)–0.1(Co&lt;sub&gt;0.9&lt;/sub&gt;Ni&lt;sub&gt;0.1&lt;/sub&gt;Fe&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;4&lt;/sub&gt;), and 0.9(Ba&lt;sub&gt;0.92&lt;/sub&gt;Ca&lt;sub&gt;0.08&lt;/sub&gt;Zr&lt;sub&gt;0.04&lt;/sub&gt;Ti&lt;sub&gt;0.96&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt;)–0.1(Co&lt;sub&gt;0.9&lt;/sub&gt;Ni&lt;sub&gt;0.1&lt;/sub&gt;Fe&lt;sub&gt;1.95&lt;/sub&gt;Dy&lt;sub&gt;0.05&lt;/sub&gt;O&lt;sub&gt;4&lt;/sub&gt;), were prepared by the conventional standard solid-state chemical reaction method. These complex materials were investigated to understand their structure, morphology, and ferroelectric, magnetic, dielectric, and magnetoelectric properties and performance. X-ray diffraction (XRD) and Rietveld refinement analyses confirmed the purity of the ferroelectric and magnetic phases, while the polarization (&lt;i&gt;P&lt;/i&gt;) versus electric field (&lt;i&gt;E&lt;/i&gt;) measurements revealed the ferroelectric-like nature of all of the ME composites. Equally, the inverse piezoelectric effect was confirmed by means of bipolar strain versus electric field measurements, i.e., &lt;i&gt;S–E&lt;/i&gt; loop measurements. Maximum strain (% strain) was observed for the 0.9(BaZr&lt;sub&gt;0.04&lt;/sub&gt;Ti&lt;sub&gt;0.96&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt;)–0.1(Co&lt;sub&gt;0.9&lt;/sub&gt;Ni&lt;sub&gt;0.1&lt;/sub&gt;Fe&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;4&lt;/sub&gt;) ME composite. Magnetization versus magnetic field (&lt;i&gt;M&lt;/i&gt;–&lt;i&gt;H&lt;/i&gt;) hysteresis measurements validated the magnetic nature of all of the ME composites. The magnetic parameters, viz., saturation magnetization (&lt;i&gt;M&lt;/i&gt;&lt;sub&gt;s&lt;/sub&gt;), remnant magnetization (&lt;i&gt;M&lt;/i&gt;&lt;sub&gt;r&lt;/sub&gt;), and coercive field (&lt;i&gt;H&lt;/i&gt;&lt;sub&gt;c&lt;/sub&gt;), decrease with increasing temperature. The magnetization versus temperature (&lt;i&gt;M&lt;/i&gt;–&lt;i&gt;T&lt;/i&gt;) measurements govern the Curie temperature of the magnetic phase present in the ME composite, where the composite material loses its magnetic nature and becomes paramagnetic. The variation of the dielectric constant (ε) with frequency indicates typical dielectric dispersion behavior, while the ε–&lt;i&gt;T&lt;/i&gt; curve displays the transition temperature of the ferroelectric phase present in the ME composite. The grain-interior conduction mechanism is evident in &lt;i&gt;T&lt;/i&gt;-dependent impedance measurements, where the presence of a single semicircle is seen in Cole–Cole plots. Furthermore, the structure–property correlation and ME voltage coefficient (α&lt;sub&gt;ME&lt;/sub&gt;) measurements demonstrate that the ME composite with composition 0.9(BaZr","PeriodicalId":55639,"journal":{"name":"ACS Applied Engineering Materials","volume":"3 1","pages":"142–157 142–157"},"PeriodicalIF":0.0,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143087086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Harnessing Copper-Metalated Covalent Organic Frameworks: A Biomimetic Approach to High-Efficiency Dye Degradation","authors":"Jiamin Zhan,&nbsp;Liangwei Li,&nbsp;Yingjin Ma,&nbsp;Hongming Lou and Zhixian Li*,&nbsp;","doi":"10.1021/acsaenm.4c0072010.1021/acsaenm.4c00720","DOIUrl":"https://doi.org/10.1021/acsaenm.4c00720https://doi.org/10.1021/acsaenm.4c00720","url":null,"abstract":"<p >Schiff-base covalent organic frameworks (COFs), recognized for their designable structures, abundant modification sites, and robust stability, are considered ideal platforms for constructing biomimetic enzymes. This study introduces a strategy for the construction of copper-metalated covalent organic frameworks based on the N–M–O coordination environment of peroxidases’ metal and amino acids. A biomimetic enzyme framework, Cu-COF-TAPT-DHTA, was synthesized by postmetalation with copper. This framework catalyzes the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) with a Michaelis constant <i>K</i>_M of 0.19 mM and a catalytic efficiency <i>k</i>_cat/<i>K</i>_M of 5.26 M^–1·s^–1, demonstrating robust peroxidase activity. Additionally, leveraging the photocatalytic in situ production of hydrogen peroxide by Cu-COF-TAPT-DHTA in conjunction with its peroxidase activity enabled the degradation of methyl orange to reach 98% within 30 min, while malachite green and methylene blue were degraded over 99% within 20 min. The catalytic activity maintained 70% efficiency after seven cycles.</p>","PeriodicalId":55639,"journal":{"name":"ACS Applied Engineering Materials","volume":"3 1","pages":"225–232 225–232"},"PeriodicalIF":0.0,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143087438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carbonic Anhydrase as a Sustainable Corrosion Inhibitor for Concrete","authors":"Sara Heidarnezhad,&nbsp;Shuai Wang and Nima Rahbar*,&nbsp;","doi":"10.1021/acsaenm.4c0064310.1021/acsaenm.4c00643","DOIUrl":"https://doi.org/10.1021/acsaenm.4c00643https://doi.org/10.1021/acsaenm.4c00643","url":null,"abstract":"<p >Concrete, the most widely used material globally, accounts for 8% of all CO₂ emissions, with corrosion being a primary factor limiting its lifespan. This study investigates the use of carbonic anhydrase (CA), a bioenzyme, as a cost-effective corrosion inhibitor. Concrete specimens with varying CA dosages─Control, CA-1X, CA-5X, CA-10X, and CA-20X─were made and tested under accelerated corrosion tests. Results show that CA-5X achieved the lowest corrosion rate, reducing rebar corrosion depth to 109 μm─34% lower than the control. Additionally, CA-5X delayed crack initiation by 24 h, demonstrating superior corrosion mitigation. Faraday’s law analysis provided quantitative insights into corrosion kinetics, while thermogravimetric analysis (TGA) and mercury intrusion porosimetry (MIP) revealed mechanisms of corrosion resistance, including crystal precipitation and significantly improved pore structure in the cementitious matrix. These findings highlight CA’s potential to enhance durability and sustainability by extending concrete service life and reducing repair needs, thereby mitigating its environmental impact.</p>","PeriodicalId":55639,"journal":{"name":"ACS Applied Engineering Materials","volume":"3 1","pages":"128–141 128–141"},"PeriodicalIF":0.0,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143087297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}