Nano Materials Science最新文献_第6页

Nanoscale air channel devices- inheritance and breakthrough of vacuum tube 纳米级空气通道装置--真空管的继承与突破

Nano Materials Science Pub Date : 2024-02-19 DOI: 10.1016/j.nanoms.2024.01.002

Baihong Chen, Linjie Fan, Jinshun Bi, Zhiqiang Li, Ziming Xu, Sandip Majumdar

引用次数: 0

Dynamic evolution of copper-based catalysts during CO2 electroreduction 铜基催化剂在二氧化碳电还原过程中的动态演变

Nano Materials Science Pub Date : 2024-02-05 DOI: 10.1016/j.nanoms.2024.01.007

Zhi-Zheng Wu, Peng-Peng Yang, Min-Rui Gao

{"title":"Dynamic evolution of copper-based catalysts during CO2 electroreduction","authors":"Zhi-Zheng Wu, Peng-Peng Yang, Min-Rui Gao","doi":"10.1016/j.nanoms.2024.01.007","DOIUrl":"https://doi.org/10.1016/j.nanoms.2024.01.007","url":null,"abstract":"The CO2 electroreduction reaction (CO2RR) is a promising approach of using renewable electricity to synthesize fuels and value-added chemicals. At present, Cu is generally considered to be the major monometallic catalyst capable of producing multicarbon products (C2+) with high current densities from the CO2RR, but it still suffers from the low activity and high overpotential. The challenge of sluggish CO2RR kinetics can be overcome by developing efficient Cu-based catalysts, which undergo the dynamic evolution during the reaction process. The dynamic evolution of the Cu-based catalysts taking place under working conditions makes it difficult to study the structure-activity correlation and reaction mechanism present during CO2RR. Recently, a number of important works have observed and revealed the dynamic evolution process of Cu-based catalysts by operando characterization techniques. This aspect, however, remains less summarized and prospected in the CO2RR literature. In this Review, we summarize the dynamic evolution of Cu-based catalysts during the CO2RR from aspects of structure, composition and oxidation state. We highlight the correlations between evolution behaviors and catalytic properties. Then, we discuss the dynamic deactivation process of Cu-based catalysts during CO2RR, including metal impurities contamination and carbon accumulation. In particular, we introduce recent advancements in in situ characterization techniques those are employed to probe the dynamic evolution under operating conditions. We end the Review by outlining the challenges and offering personal perspectives on the future development opportunities in this field.","PeriodicalId":501090,"journal":{"name":"Nano Materials Science","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139689451","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}

引用次数: 0

MXene multi-functionalization of polyrotaxane based PCMs and the applications in electronic devices thermal management 基于聚二十六烷的 PCM 的 MXene 多功能化及其在电子设备热管理中的应用

Nano Materials Science Pub Date : 2024-01-27 DOI: 10.1016/j.nanoms.2023.12.004

Guang-Zhong Yin, Alba Marta López, Ignacio Collado, Antonio Vázquez-López, Xiang Ao, Jose Hobson, Silvia G. Prolongo, De-Yi Wang

{"title":"MXene multi-functionalization of polyrotaxane based PCMs and the applications in electronic devices thermal management","authors":"Guang-Zhong Yin, Alba Marta López, Ignacio Collado, Antonio Vázquez-López, Xiang Ao, Jose Hobson, Silvia G. Prolongo, De-Yi Wang","doi":"10.1016/j.nanoms.2023.12.004","DOIUrl":"https://doi.org/10.1016/j.nanoms.2023.12.004","url":null,"abstract":"The aim of this work was to improve the thermal conductivity and electromagnetic shielding of the leakage proof phase change materials (PCMs), in which a polyrotaxane (PLR) was used as a support material to encapsulate PEG 1k or PEG 6k and MXene as multi-functional filler. The PCMs can be processed conveniently by a hot press and the PEG 1k containing samples showed excellent flexibility. We conducted a systematic evaluation of the phase transition behavior of the material, thermal conductivity and electromagnetic shielding performance tests. Notably, the PCMs achieved a high enthalpy values (123.9–159.6 J/g). The PCMs exhibited an increase of 44.3 %, and 137.5 % in thermal conductivity values with higher MXene content (5 wt%) for PLR-PEG6k and PLR-PEG1k, respectively, and show high shape stability and no leakage during and after phase transition. The introduction of MXene can significantly improve the electromagnetic shielding performance of PCM composites. Typically, higher conductive samples (samples which contain high MXene contents) offer a higher EMI SE shielding, reaching a maximum of 4.67 dB at 5.6 GHz for PLR-1K-MX5. These improvements solve the main problems of organic PEG based PCMs, thus making PLR-PEG-MXene based PCMs good candidates for thermoregulators of both solid-state disks and smart phone. It is worth pointing out that the sample PLR-1k-MX5 can decrease 4.3 °C of the reference temperature during cellphone running. Moreover, the temperature of the protecting sheet in the simulated solid state disk with PCM was significantly lower (showing a decreasing of 7.9 °C) compared with the blank sample.","PeriodicalId":501090,"journal":{"name":"Nano Materials Science","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139585930","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}

引用次数: 0

Spatially engineering tri-layer nanofiber dressings featuring asymmetric wettability for wound healing 空间工程三层纳米纤维敷料具有非对称润湿性，可促进伤口愈合

Nano Materials Science Pub Date : 2024-01-27 DOI: 10.1016/j.nanoms.2024.01.008

Tingting Shi, Yuan Liu, Donghui Wang, Dan Xia, Baoe Li, Ruodan Xu, Ning Li, Chunyong Liang, Menglin Chen

{"title":"Spatially engineering tri-layer nanofiber dressings featuring asymmetric wettability for wound healing","authors":"Tingting Shi, Yuan Liu, Donghui Wang, Dan Xia, Baoe Li, Ruodan Xu, Ning Li, Chunyong Liang, Menglin Chen","doi":"10.1016/j.nanoms.2024.01.008","DOIUrl":"https://doi.org/10.1016/j.nanoms.2024.01.008","url":null,"abstract":"Inspired by the skin structure, an asymmetric wettability tri-layer nanofiber membrane (TNM) consisting of hydrophilic inner layer loaded with lidocaine hydrochloride (LID), hydrophobic middle layer with ciprofloxacin (CIP) and hydrophobic outer layer has been created. The hydrophobic outer layer endows the TNM with waterproof function and anti-adhesion from contaminants. The hydrophobic middle layer with CIP preserves long-term inhibition of bacteria growth and the hydrophilic inner layer with LID possesses optimal water-absorbing capacity and air permeability. The TNM dramatically elevates the water contact angles from 10° (inner layer) to 120° (outer layer), indicating an asymmetric wettability, which could directionally transport wound exudate within the materials and meanwhile maintain a comfortable and moist environment to promote wound healing. Furthermore, the sequential release of LID and CIP could relieve pain rapidly and achieve antibacterial effect in the long run, respectively. In addition, the TNM shows superior biocompatibility towards L929 cells. The in vivo results show the TNM could prevent infection, accelerate epithelial regeneration and significantly accelerate wound healing. This study indicates the developed TNM with asymmetrical wettability and synergetic drug release shows great potential as a wound dressing in clinical application.","PeriodicalId":501090,"journal":{"name":"Nano Materials Science","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139590301","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}

引用次数: 0

Chemical incorporation of SiO2 into TiO2 layer by green plasma enhancer and quencher agents for synchronized improvements in the protective and bioactive properties 通过绿色等离子体增强剂和淬灭剂将 SiO2 化学掺入 TiO2 层，同步提高保护和生物活性性能

Nano Materials Science Pub Date : 2024-01-11 DOI: 10.1016/j.nanoms.2024.01.003

Mosab Kaseem, Ananda Repycha Safira, Mohammad Aadil, Han-Choel Choe

{"title":"Chemical incorporation of SiO2 into TiO2 layer by green plasma enhancer and quencher agents for synchronized improvements in the protective and bioactive properties","authors":"Mosab Kaseem, Ananda Repycha Safira, Mohammad Aadil, Han-Choel Choe","doi":"10.1016/j.nanoms.2024.01.003","DOIUrl":"https://doi.org/10.1016/j.nanoms.2024.01.003","url":null,"abstract":"This study explores the dynamic interaction between environmentally sustainable plasma enhancer and quencher agents during the incorporation of SiO2 into a TiO2 layer, with the primary objective of simultaneously augmenting protective and bioactive attributes. This enhancement is realized through the synergistic utilization of Tetraethyl orthosilicate (TE) and Stevia (ST) within a plasma-assisted oxidation process. To achieve this goal, Ti–6Al–4V alloy underwent oxidation in an electrolyte solution containing acetate-glycerophosphate, with the addition of TE and ST separately and in combination. TE, as a silicon oxide (SiO2) precursor, facilitates the creation of a calcium-rich, rough, porous layer by undergoing hydrolysis to generate silanol groups (Si–OH), which subsequently condense into silicon-oxygen-silicon (Si–O–Si) bonds, resulting in SiO2 formation. In contrast, ST acts as a plasma quencher, absorbing highly reactive plasma species during the oxidation process, reducing energy levels, and diminishing sparking intensity. The combination of TE and ST results in moderate sparking, balancing Stevia's quenching effect and TE's sparking influence. As a result, this coating exhibits enhanced corrosion resistance and bioactivity compared to using either ST or TE alone. The study highlights the potential of this synergistic approach for advanced TiO2-based coatings.","PeriodicalId":501090,"journal":{"name":"Nano Materials Science","volume":"57 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139462727","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}

引用次数: 0

Revisiting the mitigation of coke formation: Synergism between support & promoters' role toward robust yield in the CO2 reformation of methane 重新审视焦炭形成的缓解问题：在甲烷的二氧化碳转化过程中，支持和促进剂对提高产量的协同作用

Nano Materials Science Pub Date : 2024-01-05 DOI: 10.1016/j.nanoms.2023.10.005

Zahra Taherian, Vahid Shahed Gharahshiran, Xiaoxuan Wei, Alireza Khataee, Yeojoon Yoon, Yasin Orooji

{"title":"Revisiting the mitigation of coke formation: Synergism between support & promoters' role toward robust yield in the CO2 reformation of methane","authors":"Zahra Taherian, Vahid Shahed Gharahshiran, Xiaoxuan Wei, Alireza Khataee, Yeojoon Yoon, Yasin Orooji","doi":"10.1016/j.nanoms.2023.10.005","DOIUrl":"https://doi.org/10.1016/j.nanoms.2023.10.005","url":null,"abstract":"CO2 reformation of methane (CRM) and CO2 methanation are two interconnected processes with significant implications for greenhouse gas reduction and sustainable energy production for industrial purposes. While Ni-based catalysis suffers from poor stability due to coke formation or sintering, we report a super stable remedy. The active sites of mesoporous MgO were loaded using wet impregnation. The incorporation of Ni and promoters altered the physical features of the catalysts. Sm–Ni/MgO showed the smallest crystallite size, specific surface area, and pore volume. The Sm–Ni/MgO catalyst was selected as the most suitable candidate for CRM, with 82 % CH4 and H2/CO ratio of approximately 100 % and also for CO2 methanation with the conversion of carbon dioxide (82 %) and the selectivity toward methane reaches 100 % at temperatures above 300 ᵒC. Furthermore, the Sm–Ni/MgO catalyst was stable for 900 min of continuous reaction, without significant carbon deposition. This stability was largely due to the high oxygen mobility on the catalyst surface in the presence of Sm. Overall, we demonstrated the efficacy of using promoted Ni catalysts supported by mesoporous magnesia for the improved reformation of greenhouse gases.","PeriodicalId":501090,"journal":{"name":"Nano Materials Science","volume":"208 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139101991","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}

引用次数: 0

Nickel-based superalloy architectures with surface mechanical attrition treatment: Compressive properties and collapse behaviour 经表面机械研磨处理的镍基超级合金结构：抗压性能和塌陷行为

Nano Materials Science Pub Date : 2024-01-05 DOI: 10.1016/j.nanoms.2023.11.008

Lizi Cheng, Xiaofeng Zhang, Jiacheng Xu, Temitope Olumide Olugbade, Gan Li, Dongdong Dong, Fucong Lyu, Haojie Kong, Mengke Huo, Jian Lu

{"title":"Nickel-based superalloy architectures with surface mechanical attrition treatment: Compressive properties and collapse behaviour","authors":"Lizi Cheng, Xiaofeng Zhang, Jiacheng Xu, Temitope Olumide Olugbade, Gan Li, Dongdong Dong, Fucong Lyu, Haojie Kong, Mengke Huo, Jian Lu","doi":"10.1016/j.nanoms.2023.11.008","DOIUrl":"https://doi.org/10.1016/j.nanoms.2023.11.008","url":null,"abstract":"Surface modifications can introduce natural gradients or structural hierarchy into human-made microlattices, making them simultaneously strong and tough. Herein, we describe our investigations of the mechanical properties and the underlying mechanisms of additively manufactured nickel–chromium superalloy (IN625) microlattices after surface mechanical attrition treatment (SMAT). Our results demonstrated that SMAT increased the yielding strength of these microlattices by more than 64.71% and also triggered a transition in their mechanical behaviour. Two primary failure modes were distinguished: weak global deformation, and layer-by-layer collapse, with the latter enhanced by SMAT. The significantly improved mechanical performance was attributable to the ultrafine and hard graded-nanograin layer induced by SMAT, which effectively leveraged the material and structural effects. These results were further validated by finite element analysis. This work provides insight into collapse behaviour and should facilitate the design of ultralight yet buckling-resistant cellular materials.","PeriodicalId":501090,"journal":{"name":"Nano Materials Science","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139102011","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}

引用次数: 0

Structure transformation induced bi-component Co–Mo/A-Co(OH)2 as highly efficient hydrogen evolution catalyst in alkaline media 结构转变诱导的双组分 Co-Mo/A-Co(OH)2 作为碱性介质中的高效氢进化催化剂

Nano Materials Science Pub Date : 2024-01-01 DOI: 10.1016/j.nanoms.2023.11.006

Yingqing Ou, Lu Liu, Xiao Peng, Lili Zhang, Zhongwen Ou, Wendong Zhang, Yunhuai Zhang

引用次数: 0

Silicon-based dielectric elastomer with amino-complexed hybrids towards high actuation performance 硅基介电弹性体与氨基络合混合物的高致动性能

Nano Materials Science Pub Date : 2023-12-30 DOI: 10.1016/j.nanoms.2023.12.009

Zheng-xing Dai, Qing-qing Liu, Xiao-dong Qi, Nan Zhang, Ting Huang, Jing-hui Yang, Yong Wang

{"title":"Silicon-based dielectric elastomer with amino-complexed hybrids towards high actuation performance","authors":"Zheng-xing Dai, Qing-qing Liu, Xiao-dong Qi, Nan Zhang, Ting Huang, Jing-hui Yang, Yong Wang","doi":"10.1016/j.nanoms.2023.12.009","DOIUrl":"https://doi.org/10.1016/j.nanoms.2023.12.009","url":null,"abstract":"For improving the actuation performance at low electric fields of dielectric elastomers, achieving high dielectric constant (ɛr) and low modulus (Y) simultaneously has been targeted in the past decades, but there are few ways to accomplish both. In contrast to the classical strategies such as incorporating plasticizers or ceramic to prepare the silicon-based dielectric elastomers, here, blending an amino-complexed hybrid (polyethyleneimine (PEI)-Ag) with polydimethylsiloxane (PDMS) elastomer is reported as an alternative strategy to tailor the ɛr and Y. PEI-Ag not only exhibits excellent dielectric enhancement properties but also minimizes the PDMS crosslinking through amino-complexed reaction between PEI and Pt catalysts. The prepared dielectric elastomers have a ɛr of 7.2 @ 103 Hz and Y of 1.14 MPa, leading to an actuation strain of 22.27 % at 35 V/μm. Hence, incorporating such novel hybrids based on dual amino-complexed effect on both matrix and particles sufficiently promotes the actuated performance of dielectric elastomers.","PeriodicalId":501090,"journal":{"name":"Nano Materials Science","volume":"117 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139063551","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}

引用次数: 0

Utilizing a defective MgO layer for engineering multifunctional Co-MOF hybrid materials with tailored leaf-like and polyhedral structures for optimal electrochemical and photocatalytic activities 利用有缺陷的氧化镁层设计具有定制叶状和多面体结构的多功能 Co-MOF 混合材料，以获得最佳电化学和光催化活性

Nano Materials Science Pub Date : 2023-12-15 DOI: 10.1016/j.nanoms.2023.12.003

Mohammad Aadil, Muhammad Ali Khan, Safira Ananda Rapycha, Mosab Kaseem

{"title":"Utilizing a defective MgO layer for engineering multifunctional Co-MOF hybrid materials with tailored leaf-like and polyhedral structures for optimal electrochemical and photocatalytic activities","authors":"Mohammad Aadil, Muhammad Ali Khan, Safira Ananda Rapycha, Mosab Kaseem","doi":"10.1016/j.nanoms.2023.12.003","DOIUrl":"https://doi.org/10.1016/j.nanoms.2023.12.003","url":null,"abstract":"The hybridization of metal-organic framework (MOF) with inorganic layers would lead to the discovery of novel hybrid materials that can provide a compelling strategy for enhancing its photocatalytic and electrochemical response. In the present study, a highly efficient multifunctional hybrid material was developed by exploiting the defective layer formed on AZ31 Mg alloy through plasma electrolytic oxidation (PEO) as a nucleation and growth site for Co-MOF. The concentrations of the organic linker 2-Methylimidazole (2,MIm) and cobalt nitrate as a source of Co2+ ions were varied to control the growth of the obtained Co-MOF. Lower concentrations of the 2, MIm ligand favored the formation of leaf-like MOF structures through an anisotropic, two-dimensional growth, while higher concentrations led to rapid, isotropic nucleation and the creation of polyhedral Co-MOF structures. The sample characterized by polyhedral Co-MOF structures exhibited superior electrochemical stability, with the lowest corrosion current density (3.11 × 10−9 A/cm2) and the highest top layer resistance (2.34 × 106 Ω cm2), and demonstrated outstanding photocatalytic efficiency, achieving a remarkable 99.98 % degradation of methylene blue, an organic pollutant, in model wastewater. To assess the active adsorption sites of the Co-MOF, density functional theory (DFT) was utilized. This study explores the changes in morphologies of the coatings of Co-MOF with the change of solution concentration to form coatings with enhanced properties on the metallic substrate, which could establish the groundwork for the development of next-generation multifunctional frameworks with diverse applications.","PeriodicalId":501090,"journal":{"name":"Nano Materials Science","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138686967","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}

引用次数: 0