Progress in Natural Science: Materials International最新文献

Biologically inspired shell-hollow particles for designing efficient passive all-sky radiative cooling 设计高效被动式全天空辐射冷却的生物壳空心微粒

IF 4.8 2区材料科学

Progress in Natural Science: Materials International Pub Date : 2024-10-01 DOI: 10.1016/j.pnsc.2024.08.009

{"title":"Biologically inspired shell-hollow particles for designing efficient passive all-sky radiative cooling","authors":"","doi":"10.1016/j.pnsc.2024.08.009","DOIUrl":"10.1016/j.pnsc.2024.08.009","url":null,"abstract":"<div><div>Passive radiation cooling (PRC), as the most promising technology to meet future cooling needs, has attracted great interest. However, there are still huge challenges in manufacturing high-efficiency and low-cost radiant coolers suitable for all-day use. Here, we report a secondary micro-nano shell-hollow structure based on blending method, inspired by the African white beetle Goliathus goliatus. Due to the difference in reflectance between the shell and the internal air, compared with the homogeneous particles, the scattered light has a changed optical path at the interface of the core (air) and the shell (SiO<sub>2</sub>), and most of the light escapes from the particles, showing strong total internal reflection. The design ingeniously deposits the nano-sized shell-hollow structure on the surface of the micron-sized shell-hollow structure, achieving high solar reflectance (95 %)and excellent long-wave infrared emissivity (94 %). Sub-ambient cooling of 7.8 and 4.7 °C can be achieved at night and daytime, respectively. Silica microspheres with shell and hollow structure can be prepared by soft template method, which is mature, reliable, simple and cheap.Our work provides new ideas for the design and manufacture of high-performance Passive all-day radiative cooling (PARC).</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571242","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

Efficient and highly selective photocatalytic reduction of Cr(VI) by an active two-dimensional covalent organic framework 活性二维共价有机框架高效、高选择性地光催化还原六价铬

IF 4.8 2区材料科学

Progress in Natural Science: Materials International Pub Date : 2024-10-01 DOI: 10.1016/j.pnsc.2024.09.004

{"title":"Efficient and highly selective photocatalytic reduction of Cr(VI) by an active two-dimensional covalent organic framework","authors":"","doi":"10.1016/j.pnsc.2024.09.004","DOIUrl":"10.1016/j.pnsc.2024.09.004","url":null,"abstract":"<div><div>In this paper, a two-dimensional covalent organic framework material (named HDU-27) with thiazole structure and π-π conjugation has been successfully synthesized using the ligands tri acetaldehyde-based methoxyphenyl and benzo [1,2-d:4,5-d]thiazole-2,6-diamine in an ammonia-formaldehyde condensation reaction and applied to the photocatalytic reduction study of chromium (Cr). The photocatalytic experiments showed that HDU-27 had an excellent photocatalytic reduction of Cr(VI) with a high Cr(VI) reduction efficiency of 99.5 % at pH = 2 for 60 min. In the presence of interfering ions, HDU-27 exhibited excellent selectivity for Cr(VI). Mechanistic experiments and electron spin resonance characterization identified e<sup>−</sup> and ·O<sub>2</sub><sup>−</sup> radicals as the main active species in Cr(VI) photocatalytic reduction. In addition, the photocatalytic rate of HDU-27 was significantly accelerated in the Cr(VI)/organic pollutant (RhB, MB, MO) mixed system due to the oxidation of the organic matter and the increase in the separation of photogenerated e<sup>−</sup>−h<sup>+</sup>. The cycling experiments demonstrated the excellent reduction stability and recyclability of HDU-27 in the photocatalytic reduction of Cr(VI). HDU-27 is an excellent photocatalyst with potential application for removing organic pollutants and heavy metal ions from contaminated wastewater.</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571701","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

Large pyroelectric current generation induced by droplet cooling 液滴冷却诱导产生大热释电电流

IF 4.8 2区材料科学

Progress in Natural Science: Materials International Pub Date : 2024-10-01 DOI: 10.1016/j.pnsc.2024.07.006

{"title":"Large pyroelectric current generation induced by droplet cooling","authors":"","doi":"10.1016/j.pnsc.2024.07.006","DOIUrl":"10.1016/j.pnsc.2024.07.006","url":null,"abstract":"<div><div><span>This paper demonstrates an alternative and simple approach for achieving a fast temperature change on a pyroelectric system through droplet cooling, which leads to enhancement in pyroelectric current generation. The pyroelectric system was composed of a pyroelectric layer of lithium tantalate (LiTaO</span><sub>3</sub>) that was sandwiched between two layers of gold/titanium (Au/Ti) as the top and bottom electrodes. Due to both high latent heat and sensible heat of water, there was a rapid heat exchange during the droplet cooling process, and the pyroelectric layer underwent a fast temperature change with the maximum rate of ∼725 °C/s. The induced pyroelectric current density reached as high as ∼8.8 μA/cm<sup>2</sup><span><span>. Such pyro-current density is among the highest reported so far. The pyroelectric response was also investigated by using the surfaces with different wettability. The </span>hydrophilic surfaces<span> underwent faster heat dissipation, leading to the generation of larger current than that of the hydrophobic surfaces<span> during the droplet cooling process. This work may help expand the utilization of pyroelectric materials in various applications that involve the current generation using pyroelectric effect.</span></span></span></div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141840574","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

Molecular dynamics simulations of microstructure and dislocation evolution of single-crystal Ni-based superalloys under femtosecond laser loading 飞秒激光加载下单晶镍基超合金微观结构和位错演变的分子动力学模拟

IF 4.8 2区材料科学

Progress in Natural Science: Materials International Pub Date : 2024-10-01 DOI: 10.1016/j.pnsc.2024.06.008

{"title":"Molecular dynamics simulations of microstructure and dislocation evolution of single-crystal Ni-based superalloys under femtosecond laser loading","authors":"","doi":"10.1016/j.pnsc.2024.06.008","DOIUrl":"10.1016/j.pnsc.2024.06.008","url":null,"abstract":"<div><div>In this paper, molecular dynamics simulations are employed to investigate the temperature, stress distribution, microstructure and evolution of dislocations in single-crystal Ni-based superalloys during femtosecond laser drilling of micro-holes. The results indicate that the temperature and stress variations in the model system increase with the increment of laser energy density. The pulse width has a relatively low effect on temperature and stress variations. At the same time, an increase in dislocations is primarily related to energy density and stress distribution. The number of dislocations increases with the energy density, with the 1/6<112> dislocation showing the highest increase ratio. The densest concentration of dislocations occurs at the hole walls. Dislocations and stacking faults gradually penetrate the precipitate phase under the influence of temperature and reach a stable state as the relaxation time increases. The above research findings provide important theoretical guidance for understanding the microstructure evolution and changes in the mechanical properties of single-crystal Ni-based superalloys during femtosecond laser processing of micro-holes.</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141845555","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

Hydrothermal-deposition synthesis of MnO2/MnS nanorods as high-performance asymmetric supercapacitor positive electrode materials 水热沉积合成 MnO2/MnS 纳米棒作为高性能不对称超级电容器正极材料

IF 4.8 2区材料科学

Progress in Natural Science: Materials International Pub Date : 2024-10-01 DOI: 10.1016/j.pnsc.2024.07.023

{"title":"Hydrothermal-deposition synthesis of MnO2/MnS nanorods as high-performance asymmetric supercapacitor positive electrode materials","authors":"","doi":"10.1016/j.pnsc.2024.07.023","DOIUrl":"10.1016/j.pnsc.2024.07.023","url":null,"abstract":"<div><div>Nanostructuring has shown promise in enhancing the performance of MnO<sub>2</sub> for energy storage in supercapacitors, highlighting its technological significance. This study introduces an innovative synthesis method, employing hydrothermal and constant-pressure deposition techniques, to produce nanostructured MnO<sub>2</sub>/MnS rod electrodes on nickel foam. The roded heterostructure enhances specific surface area, conductivity, and symbiotic effect between MnO<sub>2</sub> and MnS. With optimized material and structural advantages, the electrode reaches a capacitance of 977.6 F g<sup>−1</sup> at 1 A g<sup>−1</sup>, demonstrating extended cycling lifespan. Using MnO<sub>2</sub>/MnS-5h rods as the positive electrode and activated carbon as the negative electrode, the supercapacitor achieves an energy density of 122.23 Wh kg<sup>−1</sup> at 898.75 W kg<sup>−1</sup>. Notably, it maintains 91.55 % capacity retention after 5000 cycles at 10 A g<sup>−1</sup>, indicating outstanding cycling stability. This research presents a promising solution for efficient energy storage, emphasizing the potential application of the developed MnO<sub>2</sub>/MnS based supercapacitor in high-performance energy storage systems.</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571238","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

Kelp-derived porous carbon for capacitive deionization: Trade-off effect of activation temperature 用于电容去离子的海带多孔碳：活化温度的权衡效应

IF 4.8 2区材料科学

Progress in Natural Science: Materials International Pub Date : 2024-10-01 DOI: 10.1016/j.pnsc.2024.08.008

引用次数: 0

A review of crystal defect-induced element segregation in multi-component alloy steels 多成分合金钢中晶体缺陷诱发的元素偏析综述

IF 4.8 2区材料科学

Progress in Natural Science: Materials International Pub Date : 2024-10-01 DOI: 10.1016/j.pnsc.2024.07.016

{"title":"A review of crystal defect-induced element segregation in multi-component alloy steels","authors":"","doi":"10.1016/j.pnsc.2024.07.016","DOIUrl":"10.1016/j.pnsc.2024.07.016","url":null,"abstract":"<div><div>In multi-component alloy steels, the interplay of chemical interactions among elements and variations in atomic radius often results in element segregation towards defects, markedly influencing the macroscopic material properties. Despite many recent studies reporting defect-dependent element segregation in steel, a comprehensive overview is still lacking. In this work, element segregation at various defects and their influence on steel performance are examined. It specifically delves into the influences of element segregation at dislocation, grain boundary, phase boundary, and precipitate phase interface on the mechanical performance of steel. For each type of crystal defect-induced element segregation, this review discusses the crystallographic structure, segregated microstructure, element segregation distribution, and the corresponding influence of element segregation on the mechanical performance of steel. Finally, this review extensively explores the scientific issues and challenges of element segregation research in steel. It provides valuable insights into the behavior of element segregation in steel and inspires new research directions in other multi-component alloys.</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571246","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 electrochemical oxidation of benzene and toluene in aqueous environments using Sb–SnO2-doped TiO2 nanotubes modified by hydrophobic polytetrafluoroethylene (PTFE) 使用疏水性聚四氟乙烯 (PTFE) 修饰的 Sb-SnO2 掺杂 TiO2 纳米管增强水环境中苯和甲苯的电化学氧化能力

IF 4.8 2区材料科学

Progress in Natural Science: Materials International Pub Date : 2024-10-01 DOI: 10.1016/j.pnsc.2024.07.017

{"title":"Enhanced electrochemical oxidation of benzene and toluene in aqueous environments using Sb–SnO2-doped TiO2 nanotubes modified by hydrophobic polytetrafluoroethylene (PTFE)","authors":"","doi":"10.1016/j.pnsc.2024.07.017","DOIUrl":"10.1016/j.pnsc.2024.07.017","url":null,"abstract":"<div><div>The presence of benzene and toluene in groundwater poses a serious threat to both aquatic ecosystems and human health. The electrochemical removal of these contaminants is primarily hindered by the low generation yield of reactive oxygen species (ROS). Herein, polytetrafluoroethylene (PTFE) was electrodeposited onto the surface of Sb–SnO<sub>2</sub>-doped TiO<sub>2</sub> nanotubes (TNT/Sb–SnO<sub>2</sub>/5PTFE-300) to enhance electrochemical activity. The resulting nanoelectrode achieved removal efficiencies of 96.2 % for benzene and 97.6 % for toluene. The minimal variation in the degradation of benzene and toluene following 8 cycles of use verified its stability. Experiments confirmed that •OH was the primary ROS. Hydrophobic surface of the nanoelectrode promoted the one-electron reaction of H<sub>2</sub>O oxidation, leading to •OH concentrations that were 54.0 and 27.5 times higher, respectively, than those produced by Ti/Sb–SnO<sub>2</sub>, and 4.7 and 2.0 times higher, respectively, than those produced by TNT/Sb–SnO<sub>2</sub>-300. Moreover, intermediate products suggested the ring-opening of benzene and toluene, yielding easily degradable small organic molecules. The electrochemical oxidation (EO) process revealed a competitive relationship between benzene and toluene, with toluene exhibiting stronger competitive effects (kinetic constant was 2.1 times that of benzene). The efficient nanoelectrode provide a novel approach for the removal of benzene and toluene from aquatic environments through EO.</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571316","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

MXene based flexible microheater for enhanced infrared imaging of cerebral blood flow 用于增强脑血流红外成像的基于 MXene 的柔性微加热器

IF 4.8 2区材料科学

Progress in Natural Science: Materials International Pub Date : 2024-10-01 DOI: 10.1016/j.pnsc.2024.07.018

{"title":"MXene based flexible microheater for enhanced infrared imaging of cerebral blood flow","authors":"","doi":"10.1016/j.pnsc.2024.07.018","DOIUrl":"10.1016/j.pnsc.2024.07.018","url":null,"abstract":"<div><div>Infrared thermography technology is a noninvasiveness and real-time imaging method, it has attracted enormous attentions for blood flow imaging. However, the implementation of infrared thermography technology is still limited by the poor imaging quality caused by the low temperature discrimination between the target blood vessel and background. Herein, we reported a flexible and low-cost MXene based photothermal microheater for enhancing the infrared imaging of blood flow. In the experiment, MXene films with specific thickness was prepared by vacuum filtering different concentrations of MXene colloidal solutions. Thereafter, the microheaters were fabricated by assembling the MXene films on the PU tape/PDMS substrate, and then sealed with another layer of pure PDMS film on the top of MXene film. The photothermal performance of the microheaters were evaluated by using an 808-nm laser as the exciting source. Experimental results show that the optimal microheater (MXene content: 17.5 mg) can reach a safe temperature of 41.5 °C with 43.9 s under the light irradiation of 100 mW·cm<sup>−2</sup>. Moreover, it can be stabilized at the equilibrium temperate for over 25 min. Finally, the above optimal microheater was used to accurately heat the simulated blood vessel. It shows that temperature difference of 3.3 °C can be induced between the heated blood vessel and environment. As a result, it significantly enhances the quality of the infrared imaging of the blood flow in the simulated vascular network.</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571317","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

Super tensile ductility in an as-cast TiVNbTa refractory high-entropy alloy 铸态 TiVNbTa 难熔高熵合金的超强拉伸延展性

IF 4.8 2区材料科学

Progress in Natural Science: Materials International Pub Date : 2024-10-01 DOI: 10.1016/j.pnsc.2024.08.002

引用次数: 0