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Alcohol-Assisted Salt-Spreading Synthesis of Single-Atom Zirconium Catalysts on Ultrathin 2D MWW Zeolite for Enhanced Biomass Valorization. 醇助盐扩散在超薄二维MWW沸石上合成单原子锆催化剂促进生物质增值。
IF 13.3 2区 材料科学
Small Pub Date : 2025-06-19 DOI: 10.1002/smll.202505192
Haocheng Zhang,Yanghuan Huang,Zhaoqi Ye,Lou Gao,Yahong Zhang,Yi Tang
{"title":"Alcohol-Assisted Salt-Spreading Synthesis of Single-Atom Zirconium Catalysts on Ultrathin 2D MWW Zeolite for Enhanced Biomass Valorization.","authors":"Haocheng Zhang,Yanghuan Huang,Zhaoqi Ye,Lou Gao,Yahong Zhang,Yi Tang","doi":"10.1002/smll.202505192","DOIUrl":"https://doi.org/10.1002/smll.202505192","url":null,"abstract":"The precise synthesis of single-atom Zr catalysts on ultrathin 2D MWW zeolites remains challenging due to inevitable Zr clustering, expensive precursors, and complex post-treatments. Here, an alcohol-assisted salt-spreading deposition (ASD) strategy is reported to immobilize atomically dispersed Zr sites on pre-synthesized single-layer MWW nanosheets (SL-MWW). Derive benefit from the abundant external silanol groups (SiOHext) on the external surface of ultrathin 2D-MWW, tetracoordinated Zr─O4 configurations are grafted via a facile ASD process without toxic organic solvents. Characterizations including HAADF-STEM and XAS confirm the atomic dispersion and unique tetracoordinated structure of the Zr site. The resulting Zr-SL(ASD) catalyst exhibits exceptional Lewis acidity and accessibility, achieving superior selectivity and high conversion in Meerwein-Ponndorf-Verley reduction and etherification (MPV-ETH) cascade reaction of α, β-unsaturated carbonyl compounds and transesterification to valorized biomass under mild conditions. Comparative studies reveal three possible interaction pathways between external silanol groups and Zr species that govern atomic dispersion. The ASD approach successfully eliminates expensive and toxic organometallic precursors or energy-intensive treatments, offering a green and scalable route to prepare single-atom Zr-MWW catalysts. This work provides new insights into designing efficient and sustainable zeolite-based catalysts for biomass valorization.","PeriodicalId":228,"journal":{"name":"Small","volume":"15 1","pages":"e2505192"},"PeriodicalIF":13.3,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144320374","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}
引用次数: 0
Lattice Distortion Engineering: Manipulation of Electrochemical Properties for Pyrochlore Ruthenates as Electrocatalysts in Water Splitting. 晶格畸变工程:作为水裂解电催化剂的钌酸焦绿盐的电化学性质。
IF 13.3 2区 材料科学
Small Pub Date : 2025-06-19 DOI: 10.1002/smll.202505222
Hengyu Guo,Yanzong Huang,Chuan Long,Chenyi Shao,Feifei Fang,Yinglong Yu,Zhengping Zhang,Feng Wang
{"title":"Lattice Distortion Engineering: Manipulation of Electrochemical Properties for Pyrochlore Ruthenates as Electrocatalysts in Water Splitting.","authors":"Hengyu Guo,Yanzong Huang,Chuan Long,Chenyi Shao,Feifei Fang,Yinglong Yu,Zhengping Zhang,Feng Wang","doi":"10.1002/smll.202505222","DOIUrl":"https://doi.org/10.1002/smll.202505222","url":null,"abstract":"Pyrochlores ruthenates, owing to their D3d symmetric configurations of [RuO6] octahedra to efficiently avoid the Ru dissolution during the oxygen evolution reaction (OER) process, have been promising as non-iridium electrocatalysts for proton exchange membrane water electrolysis (PEMWE). In this work, a lattice-distortion strategy is proposed, by using a series of lanthanides (from Gd to Lu) as the dominant A sites and a series of alkalines (from Mg to Ba) as the A-site substitutions, to investigate the geometric effect on the pyrochlores for OER. It is found that the larger radii difference between the A sites and the A-site substitutions, the larger lattice expansion of these alloyed pyrochlore ruthenates, accompanied by the shortened Ru─O bonding, the enlarged Ru─O─Ru bond angle, and the enhanced covalency of [RuO6] octahedra. The large lattice expansion also leads a rapid A-site leaching and the formation of protective RuOx reconstruction layers, which suppress the progressive metal dissolution, the lattice contraction, and the resulting insulated OER deactivation. On account of the synergistic effect from the lattice distortion, the most distorted LuBa pyrochlores exhibit the highest OER performance and the greatest enhancement in either electrochemical testing or PEMWE operation, demonstrating their considerable potential for practical applications.","PeriodicalId":228,"journal":{"name":"Small","volume":"145 1","pages":"e2505222"},"PeriodicalIF":13.3,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144320377","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}
引用次数: 0
Asymmetric Non-Fullerene Acceptors with Different Halogen Terminal Groups for Effective Passivation in Highly Efficient Inverted Perovskite Solar Cells. 具有不同卤素端基的不对称非富勒烯受体在高效倒置钙钛矿太阳能电池中的有效钝化。
IF 13.3 2区 材料科学
Small Pub Date : 2025-06-19 DOI: 10.1002/smll.202504515
Bingxue Pi,Yue Qiao,Ciyuan Huang,Xuerong Li,Anwen Gong,Lin Xie,Cong Liu,Chen Zuo,Linji Yang,Libin Zhang,Kai Chen,Ke Sun,Haixin Zhou,Di Huang,Hualong Chen,Wentao Xiong,Yuanyuan Kan,Dawei Di,Hongxiang Zhu,Ziyi Ge,Bingsuo Zou,Shuangfei Wang,Tao Liu
{"title":"Asymmetric Non-Fullerene Acceptors with Different Halogen Terminal Groups for Effective Passivation in Highly Efficient Inverted Perovskite Solar Cells.","authors":"Bingxue Pi,Yue Qiao,Ciyuan Huang,Xuerong Li,Anwen Gong,Lin Xie,Cong Liu,Chen Zuo,Linji Yang,Libin Zhang,Kai Chen,Ke Sun,Haixin Zhou,Di Huang,Hualong Chen,Wentao Xiong,Yuanyuan Kan,Dawei Di,Hongxiang Zhu,Ziyi Ge,Bingsuo Zou,Shuangfei Wang,Tao Liu","doi":"10.1002/smll.202504515","DOIUrl":"https://doi.org/10.1002/smll.202504515","url":null,"abstract":"Interfacial challenges between the perovskite and electron transport layers severely limit the efficiency and stability of inverted (p-i-n) perovskite solar cells (PSCs). A simple and effective strategy to achieve desired perovskite layer is to find an effective passivator. Although non-fullerene acceptors have been applied to passivate defects in PSC, asymmetric organic molecules have rarely been explored. In this work, two asymmetric molecules SY1 and SY2 compared with symmetric molecule Y6, were introduced to optimize the properties of perovskite. It has been demonstrated that SY1, a molecule with a single chlorine atom on one side of its terminal groups, exhibits dominant face-on orientation with some degree of anisotropy and inferior crystallization, which facilitates the conjugated molecule entry into grain boundary leading to superior defect and grain boundary passivation properties. A certain presence of anisotropy contributes to reducing the residual stresses. In contrast, the stronger crystallization of Y6 and SY2 results in less effective passivation. Hence, a power conversion efficiency (PCE) of 25.63% was achieved for SY1-based device which is higher than SY2-based (24.12%) and Y6-based (24.70%) devices. These findings provide new insights into designing effective passivator molecules, helping to establish the correlation between their molecular structure and device performance.","PeriodicalId":228,"journal":{"name":"Small","volume":"26 1","pages":"e2504515"},"PeriodicalIF":13.3,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144320383","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}
引用次数: 0
Fabrication of High-Loading Single Atom Catalysts for Energy-related Catalysis. 高能催化用高负荷单原子催化剂的制备。
IF 13.3 2区 材料科学
Small Pub Date : 2025-06-19 DOI: 10.1002/smll.202504632
Xiaohui Sun,Bangyang Zhang,Peng Zhang,Jiansong Miao,Chunming Xu
{"title":"Fabrication of High-Loading Single Atom Catalysts for Energy-related Catalysis.","authors":"Xiaohui Sun,Bangyang Zhang,Peng Zhang,Jiansong Miao,Chunming Xu","doi":"10.1002/smll.202504632","DOIUrl":"https://doi.org/10.1002/smll.202504632","url":null,"abstract":"Heterogeneous single-atom catalysts (SACs) have emerged as a new frontier in the field of energy-related catalysis owing to the maximum atomic utilization efficiency, unique electronic and geometric properties compared with traditional nano-catalysts. Nevertheless, it is still a great challenge to fabricate high-loading SACs, since these isolated metal sites with high surface free energy are apt to assemble into clusters or particles with a high metal content. This review summarizes recent advancements for high-loading SACs, and mainly focuses on the synthetic strategies, unique interatomic interactions, together with their applications in different chemical reactions, including photocatalysis, electrocatalysis, and thermocatalysis. Specifically, strategies that consist of wet-chemistry, atomic layer deposition, ball milling, pyrolysis, chemical vapor deposition, laser ablation, and electrodeposition are first overviewed for the preparation of high-loading SACs. Unique interatomic interactions in high-loading SACs in terms of charge transfer and variations in energy band structure, spin state and reaction pathways are further described. Then, examples of high-loading SACs in heterogeneous catalysis are discussed to illustrate the relation between their geometric and electronic properties and catalytic performance as well as the reaction mechanism. Finally, a conclusion of this review and insights into the challenges and prospects in this area are also proposed.","PeriodicalId":228,"journal":{"name":"Small","volume":"11 1","pages":"e2504632"},"PeriodicalIF":13.3,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144320384","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}
引用次数: 0
Infrared-Triggered Retinomorphic Artificial Synapse Electronic Device Containing Multi-Dimensional van der Waals Heterojunctions (Small 24/2025) 包含多维范德华异质结的红外触发视胚人工突触电子器件(Small 24/2025)
IF 13 2区 材料科学
Small Pub Date : 2025-06-19 DOI: 10.1002/smll.202570185
Soobin Shim, Seongchan Kim, Donghyun Lee, Hyeongtae Kim, Mi Ji Kwon, Su-yeon Cho, Windy Ayu Lestari, Jaeyoung Seo, Dongjoon Yeo, Jina Na, Somnath Suhas Kundale, Nuri Oh, Jun Hong Park
{"title":"Infrared-Triggered Retinomorphic Artificial Synapse Electronic Device Containing Multi-Dimensional van der Waals Heterojunctions (Small 24/2025)","authors":"Soobin Shim,&nbsp;Seongchan Kim,&nbsp;Donghyun Lee,&nbsp;Hyeongtae Kim,&nbsp;Mi Ji Kwon,&nbsp;Su-yeon Cho,&nbsp;Windy Ayu Lestari,&nbsp;Jaeyoung Seo,&nbsp;Dongjoon Yeo,&nbsp;Jina Na,&nbsp;Somnath Suhas Kundale,&nbsp;Nuri Oh,&nbsp;Jun Hong Park","doi":"10.1002/smll.202570185","DOIUrl":"https://doi.org/10.1002/smll.202570185","url":null,"abstract":"<p><b>Retinomorphic Artificial Synapses</b></p><p>In article number 2410892, Nuri Oh, Jun Hong Park, and co-workers introduced a retinomorphic artificial synapse, inspiring the human retina, with multidimensional van der Waals heterojunction. InAs quantum dots are deposited on a WSe<sub>2</sub> channel as photon receptors, facilitating efficient short-wavelength infrared (SWIR) detection. As a result, the device adapts to the SWIR signal and emulates biological synaptic properties with a superior image recognition rate, showing potential for machine vision.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":228,"journal":{"name":"Small","volume":"21 24","pages":""},"PeriodicalIF":13.0,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/smll.202570185","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144315101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multi-Enzyme Mimetic Microneedles with Spatiotemporal Control: Eradicating Biofilms, Resolving Oxidative Stress, and Revascularizing Diabetic Wounds. 具有时空控制的多酶模拟微针:消除生物膜,解决氧化应激和重建糖尿病伤口。
IF 13.3 2区 材料科学
Small Pub Date : 2025-06-19 DOI: 10.1002/smll.202505277
Jing Zhang,Xinxin Luo,Yisheng Hu,Bicong Gao,Xuying Tang,Sisi Fang,Bingqian Ou,Xiaopeng Sheng,Jinshuang Su,Jie Feng
{"title":"Multi-Enzyme Mimetic Microneedles with Spatiotemporal Control: Eradicating Biofilms, Resolving Oxidative Stress, and Revascularizing Diabetic Wounds.","authors":"Jing Zhang,Xinxin Luo,Yisheng Hu,Bicong Gao,Xuying Tang,Sisi Fang,Bingqian Ou,Xiaopeng Sheng,Jinshuang Su,Jie Feng","doi":"10.1002/smll.202505277","DOIUrl":"https://doi.org/10.1002/smll.202505277","url":null,"abstract":"Diabetic wound healing remains clinically challenging due to persistent oxidative stress and dysregulated inflammation caused by the pathological microenvironment, particularly excessive reactive oxygen species (ROS). A near-infrared (NIR)-responsive multifunctional microneedle system (Res@ZIF-67/Ce0.1Mn0.9-MMON, RZCM) integrating antioxidant, antibacterial, and angiogenic functionalities is developed. The microneedle substrate incorporates Ce0.1Mn0.9-MMON nanoparticles that synergistically exert antibacterial effects through peroxidase-mimetic activity and NIR-induced photothermal hyperthermia, while concurrently mimicking superoxide dismutase and catalase activities to scavenge ROS and alleviate hypoxia. The microneedle tips encapsulate pH-responsive Res@ZIF-67 nanoparticles that release cobalt ions (Co2+) and resveratrol in acidic environments, cooperatively stabilizing hypoxia-inducible factor 1α (HIF-1α) under normoxic conditions to promote angiogenesis. In vivo evaluations demonstrate that RZCM accelerates diabetic wound healing through coordinated mechanisms: photothermal bacterial eradication, ROS scavenging (85.7% reduction), macrophage M2 polarization (2.3 fold increase), HIF-1α-mediated neovascularization (2.1 fold higher CD31 density), and enhanced collagen remodeling (78.4% increased collagen I/III ratio). This multifunctional system achieves complete epithelialization within 14 days, outperforming conventional treatments. By integrating multi-enzyme mimetic nanomaterials with microenvironment-responsive drug delivery, RZCM establishes a novel therapeutic paradigm for chronic wound management, demonstrating significant translational potential for diabetic wound care through synergistic regulation of oxidative, inflammatory, and angiogenic pathways.","PeriodicalId":228,"journal":{"name":"Small","volume":"89 1","pages":"e2505277"},"PeriodicalIF":13.3,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144320370","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}
引用次数: 0
Enhanced CuZn Coating on Carbon Fibers Through C─O─Cu Bridging Bond for Homogeneous Zinc Deposition in Zinc‐Iron Flow Batteries 锌铁液流电池中C─O─Cu桥接键增强碳纤维上的CuZn涂层
IF 13.3 2区 材料科学
Small Pub Date : 2025-06-19 DOI: 10.1002/smll.202505164
Wei Li, Xiong Dan, Qinglin Wen, Can He, Ali Hammad, Fandi Ning, Yiyang Liu, Xingyu Zhu, Wentao Huang, Siyi Zou, Jiahao Huang, Xiaochun Zhou
{"title":"Enhanced CuZn Coating on Carbon Fibers Through C─O─Cu Bridging Bond for Homogeneous Zinc Deposition in Zinc‐Iron Flow Batteries","authors":"Wei Li, Xiong Dan, Qinglin Wen, Can He, Ali Hammad, Fandi Ning, Yiyang Liu, Xingyu Zhu, Wentao Huang, Siyi Zou, Jiahao Huang, Xiaochun Zhou","doi":"10.1002/smll.202505164","DOIUrl":"https://doi.org/10.1002/smll.202505164","url":null,"abstract":"Zinc‐based flow batteries (ZFBs) are promising for grid‐scale energy storage due to their high energy density, low cost, and safety. However, uneven zinc plating, dendrite formation, and limited areal capacity in Zn anodes remain significant challenges. To address these issues, carbon felt (CF) electrodes are functionalized with oxygen‐containing groups to form stable C─O─Cu bridging bonds, which enhance the adhesion of CuZn to CF. This modification promotes uniform deposition of a CuZn alloy layer on the carbon fibers, which increases zinc adsorption and ensures consistent zinc deposition, effectively suppressing dendrite growth. In zinc‐iron flow batteries, the CuZn‐coated carbon felt (CF‐CuZn) electrode achieves stable cycling with an average coulombic efficiency of 99.7% and a high areal capacity of 180 mAh cm<jats:sup>−2</jats:sup>. This work introduces a scalable strategy that surpasses conventional methods in improving zinc deposition uniformity and dendrite suppression, offering durable, high‐performance zinc anodes for grid‐scale energy storage applications.","PeriodicalId":228,"journal":{"name":"Small","volume":"44 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144319596","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}
引用次数: 0
Defective K2Ti8O17 Nanorod Supports Enable Stable High‐Current‐Density Acidic Water Electrolysis via Confinement‐Engineered IrOx 缺陷的K2Ti8O17纳米棒支持通过限制工程IrOx实现稳定的高电流密度酸性电解
IF 13.3 2区 材料科学
Small Pub Date : 2025-06-19 DOI: 10.1002/smll.202505131
Jiaxi Sui, Hao Sun, Fengge Wang, Qiwen Zhang, Shilin Ling, Yali Li, Zhenghan Zhang, Jun Zhong, Xiaoxiao Huang, Bo Zhong, Xiaoyan Luo
{"title":"Defective K2Ti8O17 Nanorod Supports Enable Stable High‐Current‐Density Acidic Water Electrolysis via Confinement‐Engineered IrOx","authors":"Jiaxi Sui, Hao Sun, Fengge Wang, Qiwen Zhang, Shilin Ling, Yali Li, Zhenghan Zhang, Jun Zhong, Xiaoxiao Huang, Bo Zhong, Xiaoyan Luo","doi":"10.1002/smll.202505131","DOIUrl":"https://doi.org/10.1002/smll.202505131","url":null,"abstract":"This study tackles the dual challenges of sluggish oxygen evolution reaction (OER) kinetics and excessive iridium loading in proton exchange membrane water electrolysis (PEMWE) via rational catalyst design. Through a rapid synthesis strategy, it is anchored ultrafine IrO<jats:sub>x</jats:sub> nanoparticles (&lt;3 nm) on K<jats:sub>2</jats:sub>Ti<jats:sub>8</jats:sub>O<jats:sub>17</jats:sub> (KTO), achieving exceptional acidic OER activity with ultra‐low Ir content (10.89 wt.%). The IrO<jats:sub>x</jats:sub>/KTO‐1 catalyst exhibits 4.4× higher mass activity than IrO<jats:sub>2</jats:sub> in acidic OER. In PEMWE cells, it delivers 3 A cm<jats:sup>−2</jats:sup> at 1.79 V (44.0 kWh kg<jats:sup>−1</jats:sup>) and sustains &gt;550 h at 1000 mA cm<jats:sup>−2</jats:sup> (H<jats:sub>2</jats:sub> cost: $0.88 kg<jats:sup>−1</jats:sup>, 56% below US‐DOE 2026 target). Crucially, it maintains stability for 500 h at 3000 mA cm<jats:sup>−2</jats:sup> and strong operational reliability under volatile renewable energy inputs, showcasing its potential for industrial‐scale implementation. In situ Raman spectroscopy, X‐ray analyses, and DFT calculations reveal that interfacial charge redistribution between KTO and sub‐nano IrO<jats:sub>x</jats:sub> dynamically activates Ir sites during OER, accelerates charge transfer, and reduces the OER reaction barrier. The synergy of size‐controlled active sites and defect‐mediated electronic modulation enables simultaneous high activity, stability, and industrial current density tolerance. This work establishes a paradigm for designing confinement‐stabilized nanocatalysts toward practical green hydrogen production.","PeriodicalId":228,"journal":{"name":"Small","volume":"12 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144319598","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}
引用次数: 0
Covalent Organic Framework Film with Dynamic C═N─N/C─N═N Conjugated Backbones for Full-Spectrum UV Shielding. 具有动态C = N─N/C─N = N共轭骨架的共价有机框架膜用于全光谱紫外线屏蔽。
IF 13.3 2区 材料科学
Small Pub Date : 2025-06-19 DOI: 10.1002/smll.202505917
Jingkun Li,Guoyong Jiang,Yuqi Wan,Junjie Qi,Yukihiro Ozaki,Fuwei Pi
{"title":"Covalent Organic Framework Film with Dynamic C═N─N/C─N═N Conjugated Backbones for Full-Spectrum UV Shielding.","authors":"Jingkun Li,Guoyong Jiang,Yuqi Wan,Junjie Qi,Yukihiro Ozaki,Fuwei Pi","doi":"10.1002/smll.202505917","DOIUrl":"https://doi.org/10.1002/smll.202505917","url":null,"abstract":"Covalent organic frameworks (COFs) have garnered significant interest for applications in photocatalysis, energy storage, gas storage/separation, and optoelectronics, yet achieving high-quality COF films with high UV-shielding properties still remains a challenge. In this study, transparent COF films are successfully developed and revealed their remarkable UV-shielding capability: effectively blocking 99.9% of UV light while maintaining over 96% visible transmittance. Under UV irradiation, the COF backbone undergoes structural rearrangements between hydrazo (C═N─N) and azo (C─N═N) configurations, leading to electronic redistributions and enhanced conjugation within the framework. This adaptable COF framework efficiently absorbs and dissipates UV energy through non-radiative pathways, providing high UV-blocking properties that dramatically reduce the photooxidation rates of edible oils by up to 16.9-fold compared to uncoated controls. Additionally, the superior photostability of these COF films makes them promising next-generation UV-protective materials for safeguarding sensitive materials and equipment in high-UV environments, such as high-altitude, polar, and extraterrestrial settings.","PeriodicalId":228,"journal":{"name":"Small","volume":"6 1","pages":"e2505917"},"PeriodicalIF":13.3,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144320371","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}
引用次数: 0
In Situ Unravelling NiOOH Species on Flower-Like NiFeCo LDH/Nb2CTx for Ameliorated Solar-Powered Bifunctional Electrocatalytic Benzyl Alcohol Oxidation Coupled with Hydrogen Evolution (Small 24/2025) 花状NiFeCo LDH/Nb2CTx上NiOOH物种的原位解开用于改进的太阳能双功能电催化苯甲醇氧化耦合析氢(Small 24/2025)
IF 13 2区 材料科学
Small Pub Date : 2025-06-19 DOI: 10.1002/smll.202570187
Jian Yiing Loh, Feng Ming Yap, Tan Ji Siang, Xianhai Zeng, Wee-Jun Ong
{"title":"In Situ Unravelling NiOOH Species on Flower-Like NiFeCo LDH/Nb2CTx for Ameliorated Solar-Powered Bifunctional Electrocatalytic Benzyl Alcohol Oxidation Coupled with Hydrogen Evolution (Small 24/2025)","authors":"Jian Yiing Loh,&nbsp;Feng Ming Yap,&nbsp;Tan Ji Siang,&nbsp;Xianhai Zeng,&nbsp;Wee-Jun Ong","doi":"10.1002/smll.202570187","DOIUrl":"https://doi.org/10.1002/smll.202570187","url":null,"abstract":"<p>Bifunctional Electrocatalysts</p><p>Vibrant fireworks symbolize energy release, while illuminated lanterns depict benzyl alcohol oxidation and hydrogen evolution. A molecular structure nestled within a lantern underscores catalytic transformation. Dynamic molecular jets and an electrified electrochemical cell highlight the bifunctional activity of NiFeCo LDH/Nb<sub>2</sub>CT<sub>x</sub>, showcasing the synergy of a hybridized catalyst. More in article number 2409331, Wee-Jun Ong and co-workers.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":228,"journal":{"name":"Small","volume":"21 24","pages":""},"PeriodicalIF":13.0,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/smll.202570187","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144315383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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