ACS Applied Nano Materials最新文献_第8页

Plasma-Enhanced Interfacial Electric Field for High-Performance MoS2/p-Si Photovoltaic Photodetectors 高性能MoS2/p-Si光电探测器的等离子体增强界面电场

IF 5.3 2区材料科学

ACS Applied Nano Materials Pub Date : 2024-11-25 DOI: 10.1021/acsanm.4c0542610.1021/acsanm.4c05426

Wanyu Wang, Kaixi Shi*, Jinhua Li*, Xueying Chu and Xuan Fang,

{"title":"Plasma-Enhanced Interfacial Electric Field for High-Performance MoS2/p-Si Photovoltaic Photodetectors","authors":"Wanyu Wang, Kaixi Shi*, Jinhua Li*, Xueying Chu and Xuan Fang, ","doi":"10.1021/acsanm.4c0542610.1021/acsanm.4c05426","DOIUrl":"https://doi.org/10.1021/acsanm.4c05426https://doi.org/10.1021/acsanm.4c05426","url":null,"abstract":"Localized surface plasmon resonance (LSPR) has the characteristics of a local electromagnetic field enhancement, which is extremely important in developing miniaturized high-performance photodetectors (PDs). However, most LSPR effects are used to improve the light absorption of PDs, while the incidental problem of slow response speed is often ignored. Here, we designed to construct a strong built-in electric field (BEF) within the heterojunction to solve this problem. This work demonstrates an Au@MoS2/p-Si photovoltaic PD with both high responsivity and fast response speed. Noticeably, Au nanoparticles (Au NPs) integrated on the MoS2 surface can induce LSPR to pass through monolayer MoS2 (1L-MoS2) to enhance the interfacial BEF of MoS2/p-Si, as confirmed by finite-difference time-domain simulations. Our device demonstrates simultaneous improvements in both photoresponse and response speed without sacrificing the interface quality. The photovoltaic PD exhibits excellent performance with a responsivity of 1498 mA/W, a detectivity of 1.96 × 1012 Jones, and an ultrafast response time of 3 μs, respectively. This work realizes the possibility of LSPR to enhance the interfacial BEF of heterojunctions and extends its application field to high-performance plasmonic PDs.","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"27447–27455 27447–27455"},"PeriodicalIF":5.3,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142843414","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

2D MoS2 Nanosheets-PANI Derived Nanojunctions for Highly Responsive and Energy-Efficient Metal–Semiconductor–Metal Photodetectors 高响应和高能效金属-半导体-金属光电探测器的二维MoS2纳米片-聚苯胺衍生纳米结

IF 5.3 2区材料科学

ACS Applied Nano Materials Pub Date : 2024-11-25 DOI: 10.1021/acsanm.4c0317810.1021/acsanm.4c03178

Anshika Singh*, and , Pratima Chauhan,

{"title":"2D MoS2 Nanosheets-PANI Derived Nanojunctions for Highly Responsive and Energy-Efficient Metal–Semiconductor–Metal Photodetectors","authors":"Anshika Singh*,  and , Pratima Chauhan, ","doi":"10.1021/acsanm.4c0317810.1021/acsanm.4c03178","DOIUrl":"https://doi.org/10.1021/acsanm.4c03178https://doi.org/10.1021/acsanm.4c03178","url":null,"abstract":"The exceptional properties of two-dimensional (2D) materials have contributed to significant advancements in optoelectronics (OPs). While various effective methods exist for enhancing photodetector (PD) responsivity, the constrained spectral range persists as a limiting factor of the device. This study demonstrates the ability to create a p-n heterojunction between 2D molybdenum disulfide (MoS2) nanosheets and polyaniline (PANI) for metal–semiconductor–metal (MSM) PDs using a solution-processed approach on PET substrate. We evaluated the MoS2-PANI nanohybrid PD device across the visible and ultraviolet (UV) spectra. When exposed to UV and visible light irradiation, the estimated maximum responsivities of the fabricated PD are 29.98 AW–1 and 73.32 AW–1, respectively. This is significant when compared with the earlier research on broadband PDs. We create a pathway for developing highly responsive broadband PDs by integrating organic and inorganic materials. These innovations hold promise for various applications in security, healthcare, and beyond.","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"26686–26697 26686–26697"},"PeriodicalIF":5.3,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142843392","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

Nanostructured Carbon Materials Derived from Lignin via Flame-Induced Oxidation for Supercapacitors 通过火焰诱导氧化从木质素中提取的纳米结构碳材料用于超级电容器

IF 5.3 2区材料科学

ACS Applied Nano Materials Pub Date : 2024-11-25 DOI: 10.1021/acsanm.4c0451710.1021/acsanm.4c04517

Zhong Dai, Yin Ma, Yuchun Li, Yazeng Zhang, Guan-Ying Wang, Yi Luo, Lei Pu*, Dechao Chen* and Qin Li,

{"title":"Nanostructured Carbon Materials Derived from Lignin via Flame-Induced Oxidation for Supercapacitors","authors":"Zhong Dai, Yin Ma, Yuchun Li, Yazeng Zhang, Guan-Ying Wang, Yi Luo, Lei Pu*, Dechao Chen* and Qin Li, ","doi":"10.1021/acsanm.4c0451710.1021/acsanm.4c04517","DOIUrl":"https://doi.org/10.1021/acsanm.4c04517https://doi.org/10.1021/acsanm.4c04517","url":null,"abstract":"The development of high-performance, low-cost supercapacitors holds significant importance for the use of renewable energy. However, enhancing their energy density without compromising their inherent properties remains a formidable challenge. In this study, the method of flame-induced oxidation is introduced to enhance the wettability and porosity of lignin-based carbon nanomaterial. The results of FTIR, XRD, XPS, and Raman spectroscopy confirmed the effectiveness of flame-induced oxidation. The finally obtained carbon nanomaterial possesses a specific surface area of 497.84 m2 g–1 and abundant heteroatom content (O: 7.3%, N: 6.9%, and S: 1.5%). As a result, the assembled supercapacitors demonstrated an energy density of 26.45 W h kg–1 at a power density of 800 W kg–1. The Trasatti method and ion diffusion analysis reveal that the outstanding energy storage properties are attributed to the synergistic effect of enriched heteroatom content and developed nanopore structure. This work introduces an approach for designing carbon material with appropriate pore size and heteroatom content to develop high-performance supercapacitors.","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"26743–26755 26743–26755"},"PeriodicalIF":5.3,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142843396","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 Scanning Electron Microscopy Crack Characterization and Resistance Evolution in Cyclically-Strained Ag Nanoflake-Based Inks 循环应变银纳米片基油墨的原位扫描电镜裂纹表征及阻力演化

IF 5.3 2区材料科学

ACS Applied Nano Materials Pub Date : 2024-11-25 DOI: 10.1021/acsanm.4c0513310.1021/acsanm.4c05133

Qiushi Li, Antonia Antoniou* and Olivier N. Pierron*,

{"title":"In Situ Scanning Electron Microscopy Crack Characterization and Resistance Evolution in Cyclically-Strained Ag Nanoflake-Based Inks","authors":"Qiushi Li, Antonia Antoniou* and Olivier N. Pierron*, ","doi":"10.1021/acsanm.4c0513310.1021/acsanm.4c05133","DOIUrl":"https://doi.org/10.1021/acsanm.4c05133https://doi.org/10.1021/acsanm.4c05133","url":null,"abstract":"The reliability of nanocomposite conductive inks under cyclic loading is the key to designing robust flexible electronics. Although resistance increases with cycling and models exist, the exact degradation mechanism is not well understood and is critical for developing inks. This study links cracking behavior to changes in electrical resistance by performing in situ cyclic stretch experiments in scanning electron microscopy (SEM) with synchronized resistance measurements. Two screen-printed conductive inks, PE874 and 5025, on thermoplastic polyurethane (TPU) and polyimide (PI) substrates, respectively, were tested using the in situ technique. The obtained SEM images were analyzed with digital image correlation (DIC) to map the strain across cycles. The strain maps show that fatigue damage mainly occurred within the cracks formed during the initial monotonic stretch. There was no delamination at the ink–substrate interface or crack extension along the surface with cycling. Instead, fatigue damage resulted from a combination of crack widening and local shearing within the existing cracks. Crack depth varied based on the ink and substrate properties. The cracks in the 5025 ink on the PI substrate were only partially through the ink thickness, while fully through-thickness cracks were more prevalent in the PE874 ink on the TPU substrate. The 5025 ink showed a faster resistance increase with cycling than the PE874 ink because fatigue damage affected more bridging ink material for partial through-thickness cracks. Higher strain amplitudes caused greater crack widening and shearing and therefore faster resistance increase per cycle.","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"27173–27184 27173–27184"},"PeriodicalIF":5.3,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsanm.4c05133","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142843470","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

Nickel Sulfide/Graphene Composites for Electromagnetic Wave Absorption 用于电磁波吸收的硫化镍/石墨烯复合材料

IF 5.3 2区材料科学

ACS Applied Nano Materials Pub Date : 2024-11-25 DOI: 10.1021/acsanm.4c0515710.1021/acsanm.4c05157

Chuanhe Wang, Yani Zhang, Weiao Kong, Gen Li, Zhiqiang Xue, Shoubing Wang, Zhidong Liu, Huanian Zhang, Liping Guo*, Min Zhang and Shugang Tan*,

{"title":"Nickel Sulfide/Graphene Composites for Electromagnetic Wave Absorption","authors":"Chuanhe Wang, Yani Zhang, Weiao Kong, Gen Li, Zhiqiang Xue, Shoubing Wang, Zhidong Liu, Huanian Zhang, Liping Guo*, Min Zhang and Shugang Tan*, ","doi":"10.1021/acsanm.4c0515710.1021/acsanm.4c05157","DOIUrl":"https://doi.org/10.1021/acsanm.4c05157https://doi.org/10.1021/acsanm.4c05157","url":null,"abstract":"In this work, heterogeneous nickel sulfide/graphene composites were prepared by a simple solvent-thermal method. Composite graphene with excellent electrical conductivity and heterogeneous nickel sulfide can significantly improve its electromagnetic wave absorption performance. A systematic analysis of the effect of the mass ratio of graphene to heterogeneous nickel sulfide on the electromagnetic wave absorption performance. The introduction of graphene resulted in a heterogeneous interface, enhanced both interface and dipole polarizations, and consequently improved the electromagnetic wave absorption performance of the sample. When the mass ratio of heterogeneous nickel sulfide/graphene is 7:1, the minimum reflection loss value of the composite material is −41.8 dB at a thickness of 2.5 mm. In addition, With the thickness adjusted to 1.4 mm, the relative effective absorption bandwidth is 3.84 GHz. The resulting nickel sulfide/graphene heterogeneous composites are characterized by high absorption capacity, thin thickness, and light weight under the synergistic effect of multiple loss mechanisms, which is a promising electromagnetic wave absorbing material.","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"27124–27133 27124–27133"},"PeriodicalIF":5.3,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142843474","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

Pea Protein Isolate-Based Nanofibers for Delivery of Clotrimazole 基于豌豆分离蛋白的纳米纤维递送克霉唑

IF 5.3 2区材料科学

ACS Applied Nano Materials Pub Date : 2024-11-24 DOI: 10.1021/acsanm.4c0598910.1021/acsanm.4c05989

Kleopatra Kalouta, Mai Bay Stie, Valeria Vetri and Vito Foderà*,

{"title":"Pea Protein Isolate-Based Nanofibers for Delivery of Clotrimazole","authors":"Kleopatra Kalouta, Mai Bay Stie, Valeria Vetri and Vito Foderà*, ","doi":"10.1021/acsanm.4c0598910.1021/acsanm.4c05989","DOIUrl":"https://doi.org/10.1021/acsanm.4c05989https://doi.org/10.1021/acsanm.4c05989","url":null,"abstract":"A large part of the global population, including both immunocompromised and healthy individuals, suffers from fungal infections. The majority of current drug candidates for treating fungal infections exhibit poor water solubility, which hampers their permeability through biological barriers and limits their bioavailability. Here, we fabricated pea protein isolate (PPI)/poly(ethylene oxide) nanofibers (PPI/PEO nanofibers), with a high protein content [65% (w/w)] by waterborne electrospinning as an eco-friendly drug delivery system. X-ray diffraction results demonstrated that the solid-state properties of the individual components (PPI and PEO) were retained in the PPI/PEO nanofibers. We then encapsulated the poorly water-soluble drug, clotrimazole (CTZ), in the nanofibers (PPI/PEO/CTZ nanofibers), without heat treatment and/or use of an organic solvent or surfactant to presolubilize CTZ, generating an antifungal delivery system for topical administration. An in vitro study demonstrated that CTZ was successfully loaded in and released from the nanofibers. Additionally, the nanofibers were not toxic to HeLa cells. Finally, based on an antifungal disc agar diffusion study, CTZ-loaded nanofibers were shown to be effective against Candida albicans. The overall results demonstrate the potential of PPI-based nanofibers as a green platform for the generation of CTZ-loaded efficient drug delivery systems for antifungal treatment.","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"27736–27744 27736–27744"},"PeriodicalIF":5.3,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142843661","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

Sodium Alginate/TiO2 Bilayer Material Multiphase Photocatalytic Degradation of Seawater Pollutants and Synergistic Seawater Evaporation 海藻酸钠/TiO2双层材料多相光催化降解海水污染物及协同海水蒸发

IF 5.3 2区材料科学

ACS Applied Nano Materials Pub Date : 2024-11-24 DOI: 10.1021/acsanm.4c0528410.1021/acsanm.4c05284

Chen Zhu, Xinyu Xiao, Xing Wang, Zihao Ma* and Ying Han*,

{"title":"Sodium Alginate/TiO2 Bilayer Material Multiphase Photocatalytic Degradation of Seawater Pollutants and Synergistic Seawater Evaporation","authors":"Chen Zhu, Xinyu Xiao, Xing Wang, Zihao Ma* and Ying Han*, ","doi":"10.1021/acsanm.4c0528410.1021/acsanm.4c05284","DOIUrl":"https://doi.org/10.1021/acsanm.4c05284https://doi.org/10.1021/acsanm.4c05284","url":null,"abstract":"Solar Interfacial Evaporation (SIE), which relies solely on solar energy, reduces heat loss by concentrating heat at the water–air interface, making it an ideal approach for solar-driven seawater desalination and wastewater purification. Recently, biomass-based carbon materials have become prominent SIE materials for seawater desalination due to their abundant sources, excellent thermal stability, high specific surface area, and rich internal pore structures. In this work, a porous composite material was developed by cross-linking alginate and cellulose with calcium chloride, followed by loading TiO2 onto the material’s surface to create a composite with a hydrophilic transport layer and a hydrophobic evaporation layer (SAC/CTi). This material enables efficient water recovery via solar evaporation of seawater and wastewater purification through a three-phase photocatalysis. Under 0.25 W/cm2 illumination, the surface temperature of the sample can reach 192 °C within 3 min. During light-induced evaporation, the layered structure retains water between the hydrophilic transport and hydrophobic layers, balancing the water supply and evaporation. The spherical design of the evaporator maintains a high photothermal conversion efficiency from different angles. When light is incident vertically, the evaporator achieves a peak seawater evaporation rate of 1.7 kg/(m2·h). Additionally, the double-layer evaporator demonstrates a strong photocatalytic performance, acid–base resistance, and effective pollutant purification while evaporating seawater. SAC/CTi holds significant potential for applications in seawater desalination, water pollution treatment, and broader environmental remediation processes.","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"27287–27298 27287–27298"},"PeriodicalIF":5.3,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851087","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

Amphiphilic Dendrimer-Based Self-Assembled Nanodrug for Responsive Drug Delivery and Chemotherapy 基于两亲性树突状分子的自组装纳米药物反应性药物传递和化疗

IF 5.3 2区材料科学

ACS Applied Nano Materials Pub Date : 2024-11-24 DOI: 10.1021/acsanm.4c0539010.1021/acsanm.4c05390

Mei Cong, Guangxing Xie, Bingjie Wang, Qian Liu, Hao Sun, Shaoyou Yang, Feifei Li, Yongguang Zhang, Ranxu Liu and Weidong Zhao*,

{"title":"Amphiphilic Dendrimer-Based Self-Assembled Nanodrug for Responsive Drug Delivery and Chemotherapy","authors":"Mei Cong, Guangxing Xie, Bingjie Wang, Qian Liu, Hao Sun, Shaoyou Yang, Feifei Li, Yongguang Zhang, Ranxu Liu and Weidong Zhao*, ","doi":"10.1021/acsanm.4c0539010.1021/acsanm.4c05390","DOIUrl":"https://doi.org/10.1021/acsanm.4c05390https://doi.org/10.1021/acsanm.4c05390","url":null,"abstract":"Chemotherapy continues to be a mainstay of cancer therapy. However, the anticancer efficacy of chemotherapy drugs is greatly restricted by their side effects and resistance. Nanotechnology-based combination therapy is expected to improve chemotherapy by enhancing anticancer drug efficacy, reducing drug toxicity, and overcoming drug resistance. In this study, we developed an original nanoprodrug based on an ibuprofen-modified amphiphilic dendrimer (AIP), which could self-assemble into nanoparticles to codeliver the anticancer agent doxorubicin. Owing to the protonation of amine units in amphiphilic dendrimers, the resulting nanosystem (AIP@DOX) could control the pH-stimulated release of loaded cargos in the acidic tumor microenvironment. Importantly, AIP@DOX not only significantly facilitated the cellular uptake and retention of doxorubicin but also notably decreased the drug efflux to combat drug resistance, both of which contribute to enhanced drug potency. Moreover, the high selectivity of AIP@DOX obviously reduced doxorubicin-based toxicity and markedly prolonged the survival of the mice. Benefiting from the advantageous features of both combination therapy and nanotechnology-based drug delivery, this chemo/anti-inflammatory combination nanosystem constitutes a potent therapeutic candidate for cancer treatment. This study also highlights the promise of self-assembling amphiphilic dendrimer-based vesicles for drug delivery in combination therapy to enhance drug potency.","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"27365–27376 27365–27376"},"PeriodicalIF":5.3,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142843717","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

Bead-Structured Triple-Doped Carbon Nanocage/Carbon Nanofiber Composite as a Bifunctional Oxygen Electrocatalyst for Zn–Air Batteries 珠状结构三掺杂碳纳米笼/碳纳米纤维复合材料作为锌空气电池双功能氧电催化剂

IF 5.3 2区材料科学

ACS Applied Nano Materials Pub Date : 2024-11-24 DOI: 10.1021/acsanm.4c0538510.1021/acsanm.4c05385

Qing Wang, Yige Zhao*, Bo Zhang, Yukun Li, Xiang Li, Guosheng Shao and Peng Zhang*,

{"title":"Bead-Structured Triple-Doped Carbon Nanocage/Carbon Nanofiber Composite as a Bifunctional Oxygen Electrocatalyst for Zn–Air Batteries","authors":"Qing Wang, Yige Zhao*, Bo Zhang, Yukun Li, Xiang Li, Guosheng Shao and Peng Zhang*, ","doi":"10.1021/acsanm.4c0538510.1021/acsanm.4c05385","DOIUrl":"https://doi.org/10.1021/acsanm.4c05385https://doi.org/10.1021/acsanm.4c05385","url":null,"abstract":"Zeolitic imidazolate framework (ZIF)-derived metal–nitrogen carbon (M–N–C) materials are considered as promising electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) applied in rechargeable zinc–air batteries (ZABs). However, due to their unsatisfied conductivity and aggregation, appropriate regulations about structure and components are still necessary to achieve superior bifunctional performance. Herein, by simple ion exchange and one-step electrospinning method, a beaded composite electrocatalyst (Fe, Co–N–C/CNF) with Fe, Co, N codoped carbon nanocages uniformly embedded in the carbon nanofibers one by one was synthesized, achieving simultaneous structural and compositional regulation. Benefiting from the beaded-like structure and dual sites, the Fe, Co–N–C/CNF exhibits outstanding bifunctional catalytic performance for the ORR and the OER. Ultraviolet photoelectron spectroscopy (UPS) reveals that Fe, Co–N–C/CNF has a low electron transfer barrier between active centers and the ORR (OER) intermediates, ultimately accelerating the reaction kinetics. In addition, the Fe, Co–N–C/CNF-based ZAB also demonstrates superior charge–discharge performance compared to the Pt/C-RuO2-based ZAB. This study not only offers an effective structural design strategy but also provides a component regulation method for ZIF-derived materials as bifunctional electrocatalysts.","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"27377–27386 27377–27386"},"PeriodicalIF":5.3,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142843718","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

Electronic Feature Modification of Ni and Co Free Metal–Organic Framework Nanoparticles by Vanadium Introduction for Water Oxidation 引入钒修饰无Ni和Co金属-有机骨架纳米粒子的电子特征

IF 5.3 2区材料科学

ACS Applied Nano Materials Pub Date : 2024-11-24 DOI: 10.1021/acsanm.4c0503310.1021/acsanm.4c05033

Baghendra Singh*, Neetu Verma, Pragya Arora and Apparao Draksharapu*,

{"title":"Electronic Feature Modification of Ni and Co Free Metal–Organic Framework Nanoparticles by Vanadium Introduction for Water Oxidation","authors":"Baghendra Singh*, Neetu Verma, Pragya Arora and Apparao Draksharapu*, ","doi":"10.1021/acsanm.4c0503310.1021/acsanm.4c05033","DOIUrl":"https://doi.org/10.1021/acsanm.4c05033https://doi.org/10.1021/acsanm.4c05033","url":null,"abstract":"Electrocatalytic water splitting has emerged as an innovative technique for producing green hydrogen fuel. In this regard, a series of electrocatalysts based on Ni and Co have been investigated for improved oxygen evolution activity. However, the reliance on Ni and Co constraints the development of cost-effective electrocatalysts and presents challenges for advancing innovation in this field. In this work, we developed Ni- and Co-free VFe-MOF nanoparticles exhibiting remarkable electrocatalytic performance for electrocatalytic water oxidation. Spectroscopic analysis revealed that the V-introduction induced easier access to high valent Fe3+ due to its electronic withdrawing nature altering the electronic features of the Fe-MOF. Easier access of Fe3+ led to the accessible O–O bond formation, boosting the catalytic reactivity. Consequently, VFe-MOF nanoparticles achieved superior oxygen evolution reaction (OER) activity, surpassing the performance of CoFe- and NiFe-MOF counterparts. It demonstrated a notably low overpotential of 220 mV at a current density of 10 mA cm–2, outperforming Fe-MOF, CoFe-MOF, and NiFe-MOF. The incorporation of high-valent vanadium significantly enhanced the electronic properties of the Fe-MOF, accelerating OER kinetics and increasing the number of reactive sites and surface area, which collectively boosted catalytic performance. Additionally, the VFe-MOF achieved a high faradaic efficiency (FE) of 97.6% for OER, reflecting its intrinsic catalytic efficacy. Postcatalytic analysis indicated that VFe-MOF undergoes electrochemical reconstruction into an active Fe(O)OH phase, which serves as the true active species for OER.","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"27064–27070 27064–27070"},"PeriodicalIF":5.3,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142843662","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