Materials Horizons最新文献

{"title":"Transformation study and characterization of Cu-BTC MOF-derived nanoporous copper oxide.","authors":"Sameh Khalil, Abhijit Ganguly, Davide Mariotti, Supriya Chakrabarti","doi":"10.1039/d4mh01085j","DOIUrl":"10.1039/d4mh01085j","url":null,"abstract":"<p><p>This study provides a systematic and comprehensive investigation of the transformation process of copper-based metal-organic frameworks (Cu-BTC MOFs) into nanoporous copper oxides (P-CuO_<i>x</i>) through controlled calcination. While calcination is a well-established method for producing MOF-derived oxides, previous studies have primarily focused on their applications. Most of them often lack detailed exploration of the transformation process and decomposition mechanisms though it is crucial for achieving tunability in MOF-derived structures. Our study addresses this gap by offering valuable insights that can guide the production of various MOF-derived oxides with tunable structural and functional properties. In this report, we have meticulously analysed the combined effects of calcination parameters, including temperature (250-500 °C), heating rate (0.5-10 °C min^-1), and duration (1 and 2 hours) on the phase transformation, morphological features, and optical properties of Cu-BTC during its transformation to P-CuO_<i>x</i>. Results revealed that fine adjustments to these calcination parameters allow precise control over phase purity, surface area, and porosity, achieving a high surface area of 113 m² g^-1 for derived P-CuO. Furthermore, the P-CuO_<i>x</i> materials exhibited strong visible-light absorption, highlighting their potential for solar energy harvesting applications. This approach opens opportunities for designing advanced materials with customized performance characteristics. The findings have broad applicability and enable the research community to fully exploit MOF-derived oxides for designing advanced materials with customized properties for diverse applications, including energy, sensing, and biomedical.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142613040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Manipulating key intermediates and suppressing the hydrogen evolution reaction <i>via</i> dual roles of Bi for high-efficiency nitrate to ammonia and energy conversion.","authors":"Chunming Yang, Tingting Wei, Chuantao Wang, Feng Yue, Xiang Li, Huijuan Pang, Xueyan Zheng, Yantu Zhang, Feng Fu","doi":"10.1039/d4mh01133c","DOIUrl":"10.1039/d4mh01133c","url":null,"abstract":"<p><p>The nitrate reduction reaction (NO₃RR) is a promising technology for simultaneous treatment of NO₃^- wastewater and synthetic ammonia. However, the NO₃RR involves multiple electron and proton transfer processes, and the ammonia selectivity and yield are highly susceptible to the evolution of key intermediate (*NO₂) and the competing hydrogen evolution reaction (HER). In this study, bismuth (Bi), with a high hydrogen overpotential, is used as an inhibitor of the HER. Meanwhile, the Bi doping CoS₂ (Bi-CoS₂) can refine the d-band center of CoS₂, which optimizes the adsorption of *NO₂, reduces the accumulation of NO₂^- on the surface of the catalyst and then releases more active sites, thereby enhancing the NO₃RR activity. This viewpoint is verified by experimental results, density functional theory (DFT) calculations and <i>in situ</i> Raman. Benefitting from the dual roles of Bi, Bi-CoS₂ exhibits a highest NH₃ Faraday Faradaic efficiency (FE) of 87.18%, an ammonia yield rate of 944.64 μg h^-1 cm^-1 and long-term stability at -0.2 V <i>versus</i> the reversible hydrogen electrode (RHE). Furthermore, an assembled Zn-NO₃^- battery can reach a maximum power density of 16.3 mW cm^-2 and high FE_NH₃ of 95.76%, providing a high-efficiency multifunctional system for nitrate to ammonia and energy conversion.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142613032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Patternable, high-precision, controllable wettability copper layers for 3D resin-based weather-resistant electronics and 3D liquid manipulation.","authors":"Pengan Luo, Haoran Xu, Hao Lu, Huaiyu Zhao, Siying Li, Tao Zhou","doi":"10.1039/d4mh00756e","DOIUrl":"10.1039/d4mh00756e","url":null,"abstract":"<p><p>The realization of 3D patterned metal layers with manipulable surface wettability has significant potential, especially in integrating microelectronics with weather resistance and multifunctional liquid manipulation. However, developing a facile and efficient method to bring it to fruition remains a great challenge. In this work, we proposed a novel 3D selective metallization strategy that combines stereolithography 3D printing with laser-induced selective metallization (LISM). Utilizing 355 nm UV or 1064 nm lasers, this strategy can prepare 3D conductive copper patterns (or circuits) with controlled wettability on various 3D-printed resin parts. The copper layer surface prepared <i>via</i> LISM formed microstructures similar to the papillae on the surface of a lotus leaf, and it spontaneously exhibited superhydrophobicity (156.6°) after aging in the air at room temperature. Superhydrophobic 3D circuits with self-cleaning, corrosion-resistant, and anti-condensation performance were successfully fabricated. By further treating the copper layer with a 355 nm UV laser, we realized the transformation of the superhydrophobic copper layer to a superhydrophilic state, enabling us to prepare high-precision superhydrophilic patterns or channels. A 3D self-driven flow channel was fabricated to successfully realize 3D liquid manipulation and small-scale chemical experiments.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142602420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fresh insights into structure-function-integrated self-antibacterial Cu-containing Al alloys: giving Al alloys a new function.","authors":"Zhuanzhuan Song, Ying Cai, Xin Li, Ying-Chao Zhao, Dengfeng Yin, Andrej Atrens, Ming-Chun Zhao","doi":"10.1039/d4mh00770k","DOIUrl":"10.1039/d4mh00770k","url":null,"abstract":"<p><p>Contact infection by bacteria and viruses is a serious concern to human health. The increasing occurrence of public health problems has stimulated the urgent need for the development of antibacterial materials. Al alloys are the fastest-growing mass-produced material group, a prerequisite for the lightweight design of vehicles, food containers and storage, as well as civil-engineering structures. In this work, the structure-function-integrated concept was used to design and produce self-antibacterial Al-<i>x</i>Cu (<i>x</i> = 2.8 and 5.7) alloys for the first time ever. The antibacterial tests indicated that Al-2.8Cu and Al-5.7Cu alloys provided a stable and efficient bacteriostatic rate against <i>S. aureus</i> and <i>E. coli</i>, which was 87% for Al-2.8Cu and 100% for Al-5.7Cu against <i>S. aureus</i> at 24 h, and 89% for Al-2.8Cu and 94% for Al-5.7Cu against <i>E. coli</i> at 24 h. The antibacterial effect was similar to the commonly-used antibacterial materials with a similar Cu content. Furthermore, the mechanical properties and corrosion resistance of Al-2.8Cu and Al-5.7Cu were comparable to those of the current commonly-used commercial casting Al-Cu alloys. Structural insights into the performance and biomedical function by Cu-rich precipitates provided understanding of the mechanisms of these structure-function-integrated self-antibacterial Cu-containing Al alloys: (i) the Cu-rich precipitates produced strengthening, and (ii) the immediate contact with Cu-rich precipitates and the Cu²⁺ caused a synergistic action in improving antibacterial activity. This work gives Al alloys a new function and inspires fresh insights into structure-function-integrated antibacterial Al alloys.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142602351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multiple H-bonds induced mechanically robust vat photopolymerization 3D printing poly(urethane-urea) elastomers.","authors":"Xingxing Yang, Changcheng Bai, Bin Zhu, Jiayu Wu, Mingyang Wang, Yixian Wang, Tao Wu, Desheng Liu, Pan Jiang, Xiaolong Wang","doi":"10.1039/d4mh01191k","DOIUrl":"10.1039/d4mh01191k","url":null,"abstract":"<p><p>Vat photopolymerization (VP) elastomers show great promise across various fields, yet they face significant challenges in achieving adequate mechanical strength, elasticity, and durability due to incomplete polymerization and weak interfacial bonding between printed layers. In this study, we introduce high-performance poly(urethane-urea) elastomers (PUEs) utilizing a dual cross-linked network (DCN) strategy compatible with VP 3D printing. This innovative approach enhances mechanical properties by incorporating multiple hydrogen-bonded urethane and urea groups. The presence of multiple hydrogen bonds facilitates energy dissipation under external mechanical stress and improves interfacial interlocking, while the covalent cross-linked network provides stability and flexibility during deformation. The resulting elastomer exhibits a tensile strength of 28.30 ± 1.10 MPa, a recovery strain of approximately 300%, and a fracture energy of 22.90 ± 4.20 kJ m^-2. As a proof of concept, we demonstrate the rapid fabrication of 3D-printed stents with intricate architectures, outstanding load-bearing capabilities, and excellent biocompatibility. This strategy not only paves the way for the development of mechanically robust, complex-structured PUEs but also broadens their application scope in engineering and biomedical fields.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142602419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>Materials Horizons</i> Emerging Investigator Series: Dr Dana Alsulaiman, KAUST, Saudi Arabia.","authors":"","doi":"10.1039/d4mh90117g","DOIUrl":"10.1039/d4mh90117g","url":null,"abstract":"<p><p>Our Emerging Investigator Series features exceptional work by early-career researchers working in the field of materials science.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142602334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Real-time autonomous control of a continuous macroscopic process as demonstrated by plastic forming.","authors":"Shun Muroga, Takashi Honda, Yasuaki Miki, Hideaki Nakajima, Don N Futaba, Kenji Hata","doi":"10.1039/d4mh00051j","DOIUrl":"10.1039/d4mh00051j","url":null,"abstract":"<p><p>To meet the need for more adaptable and expedient approaches in research and manufacturing, we present a continuous autonomous system that leverages real-time, <i>in situ</i> characterization and an active-learning-based decision-making processor. This system was applied to a plastic film forming process to demonstrate its capability in autonomously determining process conditions for specified film dimensions without human intervention. Application of the system to nine film dimensions (width and thickness) highlighted its ability to explore the search space and identify appropriate and stable process conditions, with an average of 11 characterization-adjustment iterations and a processing time of 19 minutes per width, thickness combination. The system successfully avoided common pitfalls, such as repetitive over-correction, and demonstrated high accuracy, with <i>R</i>² values of 0.87 and 0.90 for film width and thickness, respectively. Moreover, the active learning algorithm enabled the system to begin exploration with zero training data, effectively addressing the complex and interdependent relationships between control factors (material supply rate, applied force, material viscosity) in the continuous plastic forming process. Given that the core concept of this autonomous process can, in principle, be transferred to other continuous material processing systems, these results have implications for accelerating progress in both research and industry.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142602407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A porous network of boron-doped IrO₂ nanoneedles with enhanced mass activity for acidic oxygen evolution reactions.","authors":"Fei Hu, Peiyu Huang, Xu Feng, Changjian Zhou, Xinjuan Zeng, Congcong Liu, Guangjin Wang, Xiaowei Yang, Huawen Hu","doi":"10.1039/d4mh01358a","DOIUrl":"10.1039/d4mh01358a","url":null,"abstract":"<p><p>While proton exchange membrane water electrolyzers (PEMWEs) are essential for realizing practical hydrogen production, the trade-off among activity, stability, and cost of state-of-the-art iridium (Ir)-based oxygen evolution reaction (OER) electrocatalysts for PEMWE implementation is still prohibitively challenging. Ir minimization coupled with mass activity improvement of Ir-based catalysts is a promising strategy to address this challenge. Here, we present a discovery demonstrating that boron doping facilitates the one-dimensional (1D) anisotropic growth of IrO₂ crystals, as supported by both experimental and theoretical evidence. The synthesized porous network of ultralong boron-doped iridium oxide (B-IrO₂) nanoneedles exhibits improved electronic conductivity and reduced charge transfer resistance, thereby increasing the number of active sites. As a result, B-IrO₂ displays an ultrahigh OER mass activity of 3656.3 A g_Ir^-1 with an Ir loading of 0.08 mg_Ir cm^-2, which is 4.02 and 6.18 times higher than those of the un-doped IrO₂ nanoneedle network (L-IrO₂) and Adams IrO₂ nanoparticles (A-IrO₂), respectively. Density functional theory (DFT) calculations reveal that the B doping moderately increases the d-band center energy level and significantly lowers the free energy barrier for the conversion of *O to *OOH, thereby improving the intrinsic activity. On the other hand, the stability of B-IrO₂ can be synchronously promoted, primarily attributed to the B-induced strengthening of the Ir bonds, which help resist electrochemical dissolution. More importantly, when the B-IrO₂ catalysts are applied to the membrane electrode assembly for PEM water electrolysis (PEMWE), they generate a remarkable current density of up to 2.8 A cm^-2 and maintain operation for at least 160 h at a current density of 1.0 A cm^-2. This work provides new insights into promoting intrinsic activity and stability while minimizing the usage of noble-metal-based OER electrocatalysts for critical energy conversion and storage.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142602341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of catholyte aging on high-nickel NMC cathodes in sulfide all-solid-state batteries.","authors":"Yuanshun Li, Yukio Cho, Jiyu Cai, Chanho Kim, Xueli Zheng, Wenda Wu, Amanda L Musgrove, Yifeng Su, Robert L Sacci, Zonghai Chen, Jagjit Nanda, Guang Yang","doi":"10.1039/d4mh01211a","DOIUrl":"10.1039/d4mh01211a","url":null,"abstract":"<p><p>Sulfide solid-state electrolytes (SSEs) in all-solid-state batteries (SSBs) are recognized for their high ionic conductivity and inherent safety. The LiNi_0.8Mn_0.1Co_0.1O₂ (NMC811) cathode offers a high thermodynamic potential of approximately 3.8 V <i>vs.</i> Li/Li⁺ and a theoretical specific capacity of 200 mA h g^-1. However, the practical utilization of NMC811 in sulfide SSBs faces significant interfacial challenges. The oxidation instability of sulfide solid electrolytes against NMC811 and the formation of the cathode electrolyte interphase (CEI) during cycling lead to degradation and reduced cell performance. Volumetric changes in NMC during lithiation and de-lithiation can also cause detachment from sulfide electrolytes or internal particle cracking. Despite extensive galvanostatic cycling studies to address the issues, the calendar life of sulfide SSBs remains poorly understood. Here, we systematically studied the effects of four different catholytes on the calendar aging of LiNbO₃ (LNO)-coated NMC811, including Li₆PS₅Cl (LPSCl), Li₃InCl₆-Li₆PS₅Cl (LIC-LPSCl), Li₃YCl₆-Li₆PS₅Cl (LYC-LPSCl), and Li₁₀GeP₂S₁₂ (LGPS). Our results indicate that LPSCl provides optimal capacity retention when stored at high state-of-charge (SOC) at room temperature, but the LIC-LPSCl cathode shows significant capacity degradation and chemical incompatibility. We also established an effective electrochemical calendar aging testing protocol to simulate daily usage, enabling quick inference of the calendar life of SSBs. This new testing approach accelerates materials selection strategies for high-nickel NMC composite cathodes in sulfide SSBs.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142602347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two birds with one stone: natural polyphenols boosted periodontitis treatment of chlorhexidine <i>via</i> reducing toxicity and regulating microenvironments.","authors":"Zhiyuan Sun, Tianyou Wang, Enni Chen, Lingyi Xu, Yi Ding, Zhipeng Gu, Shimeng Xiao","doi":"10.1039/d4mh01137f","DOIUrl":"10.1039/d4mh01137f","url":null,"abstract":"<p><p>Chlorhexidine (CHX) is considered the gold standard for controlling periodontal plaque and has been extensively used as a topical agent in treating periodontitis. Nevertheless, the practical clinical application of CHX is still constrained by the inherent limitations of its properties, including toxicity, inadequate biofilm scavenging capacity, and single biological effect. In this study, polyphenolic epigallocatechin gallate (EGCG) has been employed to integrate with CHX to form an EGCG-CHX nanoplatform <i>via</i> a facile one-pot method. Due to the dynamic bonding between EGCG and CHX, the EGCG-CHX nanoparticles (NPs) show reduced toxicity and excellent response release behavior. Moreover, a series of <i>in vitro</i> and <i>in vivo</i> studies demonstrated that the EGCG-CHX NPs significantly enhanced the antibiofilm, antioxidative, anti-inflammatory, and autophagic flux activation effects of CHX, ultimately achieving an improved therapeutic effect on periodontitis. This study successfully developed a strategy boosting the efficiency of CHX for periodontitis treatment.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142589589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}