JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2020
·
IF 6.155
Minghang Li,Xiaomeng Fan,Hailong Xu,Fang Ye,Jimei Xue,Xiaoqiang Li,Laifei Cheng
The low dielectric loss of mesoporous carbon hollow microsphere (PCHM) requires high filler loading (higher than 20 wt%) when it is used as microwave absorbers. In order to decrease the filler loading of PCHM, a new strategy for synergistic increase of polarization and conductive loss was developed by twining PCHM with carbon nanotube (CNT) according to theoretic calculation. By the optimization of CNT content, the minimum reflection coefficient was -34.6 dB with a filler loading of only 10 wt%, which was much lower than -2.1 dB of PCHM. In addition, the effective absorption bandwidth was 3.6 GHz at X band with a thickness of 2.8 mm. The enhanced microwave absorption performance can be ascribed to the unique combination of hollow PCHM and one-dimensional CNT with higher graphitization degree, leading to increase of conductivity and heterogeneous interfaces. As a result, the conductive loss increased from 0.12 to 2.27 and polarization loss increased from 0.15 to 0.67, achieving the balance between attenuation ability and impedance match.
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Xian-Wei Cheng,Liang Liu,Jun-Hui Yang,Kang Tao,Jin-Ping Guan
Integrating thermal insulation and flame retardancy into polyester/cotton (T/C) blend textiles remains a significant challenge for high-performance protective fabrics. In this study, thermo-expandable microspheres (TEM) and an ammonium polyphosphate (APP)-based intumescent flame-retardant (IFR) system were co-deposited onto T/C fabrics via a polyacrylate-based surface coating to form a multifunctional protective layer. The surface morphology, thermal insulation performance, combustion behavior, flame-retardant performance and mode of action of the multifunctional T/C@TEM/APP and T/C@TEM/IFR fabrics were systematically investigated. The coated T/C fabrics exhibited reduced thermal conductivity of 0.07656 and 0.07194 W/m·K, respectively, compared to 0.12980 W/m·K for the uncoated T/C fabric, attributed to the low thermal conductivity of the expanded TEM. The T/C@TEM/APP fabric achieved a high limiting oxygen index of 29.6 %, a reduced damaged length of 10.3 cm, meeting the B1 flammability classification. Further enhancement was observed in T/C@TEM/IFR due to the high flame retardancy efficiency of the APP-based IFR system. TG-IR and char residue analyses revealed that the improved flame resistance of the coated T/C fabrics arose from synergistic effects in both the gas and condensed phases.
研究领域:
材料科学
·
纺织工程
·
高分子化学
·
阻燃技术
·
热防护材料
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2020
·Vol. 13
·期 10
·2650-2657
·
IF 8.183
Hu Junxian,Xie Yangyang,Zheng Jingqiang,Lai Yanqing,Zhang Zhian
Bismuth (Bi)-based electrode has aroused tremendous interest in potassium-ion batteries (PIBs) on account of its low cost, high electronic conductivity, low charge voltage and high theoretical capacity. However, the rapid capacity fading and poor lifespan induced by the normalized volume expansion (up to ~ 406%) and serious aggregation of Bi during cycling process hinder its application. Herein, bismuth molybdate (Bi 2 MoO 6 ) microsphere assembled by 2D nanoplate units is successfully prepared by a facile solvothermal method and demonstrated as a promising anode for PIBs. The unique microsphere structure and the self-generated potassium molybdate (K-Mo-O species) during the electrochemical reactions can effectively suppress mechanical fracture of Bi-based anode originated from the volume variation during charge/discharge of the battery. As a result, the Bi 2 MoO 6 microsphere without hybridizing with any other conductive carbon matrix shows superior electrochemical performance, which delivers a high reversible capacity of 121.7 mAh·g −1 at 100 mA·g −1 over 600 cycles. In addition, the assembled perylenetetracarboxylic dianhydride (PTCDA)//Bi 2 MoO 6 full-cell coupled with PTCDA cathode demonstrates the potential application of Bi 2 MoO 6 microsphere. Most importantly, the phase evolution of Bi 2 MoO 6 microsphere during potassiation/depotassiation process is successfully deciphered by ex situ X-ray diffraction (XRD), X-ray photoemission spectroscopy (XPS), and transmission electron microscopy (TEM) technologies, which reveals a combination mechanism of conversion reaction and alloying/dealloying reaction for Bi 2 MoO 6 anode. Our findings not only open a new way to enhance the performance of Bi-based anode in PIBs, but also provide useful implications to other alloy-type anodes for secondary alkali-metal ion batteries.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2021
·Vol. 11
·期 24
·7914-7921
·
IF 6.119
Qiuzhong Li,Lin Huang,Wenxin Dai,Zizhong Zhang
The 1T/2H heterophase junction MoS2 2D nanolayer for assembly into microspheres were fabricated through a simple one-step hydrothermal synthesis. These unique junction structure MoS2 microspheres facilitate the separation of the electron–hole between different phases for forming the built-in electric field in the nanolayer. The content of 1T/2H heterophase junctions could be effectively regulated by simple changing the molar ratio of the Mo/S source in the synthesis processes. The prepared MoS2 microspheres as a photocatalyst enable the effective hydrogen production from water. The hydrogen production activity of the photocatalyst is dependent on the content of the heterophase junctions. The hydrogen production rate was the highest up to 22.4 μmol h−1 on the optimal sample MS (1 : 2).
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2020
·Vol. 29
·期 2
·1375-1383
·
IF 1.652
Yin Yanjun,Li Xueming
In this work, an Al/CuO energetic film with a porous hollow structure was obtained by electrophoretic deposition (EPD) from an aqueous solution at low field strengths of 20 V cm −2 instead of from organic solvents. CuO porous hollow microspheres (PHMSs) were prepared by a one-step hydrothermal method. The shape of the CuO PHMSs was very uniform at the macroscale with a size of 5 μm. To codeposit the species during the EPD process, the nano-Al particles and CuO PHMSs were modified with acrylic acid and citric acid, respectively. The nano-Al particles were deposited on the surface or in the interior of the CuO PHMSs by an electrical field and formed Al/CuO PHMS composites. The chemical composition, morphology, heat release and combustion of the as-prepared composite coating films were analyzed by XRD, FESEM, FT-IR, EDS, TG-DSC and with a high-speed camera. The heat release of the Al/CuO porous thermite reached 3804 J/g with excellent combustion performance due to the novel microstructure and appropriate modifications.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 33
·13373-13386
·
IF 4.5
Shi Chonghua,Liu Xinyu,Fu Hang,Wang Jing,Yao Shaowei
As one of the most promising high-capacity anode materials for lithium-ion batteries, Sn-based anode materials have the advantages of high capacity (994 mAh g −1 ) and low price. But the anode material has large volume expansion during the cycle process, resulting in battery capacity attenuation. Therefore, carbon wrapping is used to alleviate this problem. In this work, SnO 2 nanoparticles are coated by electrospinning technology, and microspherical Sn@C composite materials are obtained after further heat treatment. The results show that when the content of SnO 2 nanoparticles is 0.13 g, the obtained Sn@C microsphere electrode material still has a high reversible discharge specific capacity of 616.90 mAh g −1 after 100 cycles at a current density of 100 mA g −1 . When the current density is 500 mA g −1 , the specific capacity is still as high as 558.20 mAh g −1 after 500 cycles, and the Sn@C microsphere electrode material exhibits excellent electrochemical performance. This provides an idea for developing high performance anode materials for lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Xue Yang,Jianjun Ma,Jing Ling,Na Li,Di Wang,Fan Yue,Shimei Xu
The cellulose acetate (CA)/SiO 2 -TiO 2 hybrid microsphere composite aerogel films were successfully fabricated via water vapor-induced phase inversion of CA solution and simultaneous hydrolysis/condensation of 3-aminopropyltrimethoxysilane (APTMS) and tetrabutyl titanate (TBT) at room temperature. Micro-nano hierarchical structure was constructed on the surface of the film. The film could separate nano-sized surfactant-stabilized water-in-oil emulsions only under gravity. The flux of the film for the emulsion separation was up to 667 L m −2 h −1 , while the separation efficiency was up to 99.99 wt%. Meanwhile, the film exhibited excellent stability during multiple cycles. Moreover, the film performed excellent photo-degradation performance under UV light due to the photocatalytic ability of TiO 2 . Facile preparation, good separation and potential biodegradation maked the CA/SiO 2 -TiO 2 hybrid microsphere composite aerogel films a candidate in oil/water separation application.
研究领域:
材料科学
·
环境工程
·
膜分离技术
·
纳米材料
·
高分子化学
·
光催化
✓ 已验证
DOI
高影响因子
Advanced Healthcare Materials
·
2024
·
IF 10
Yujian Hui,Jiannan Mao,Min Rui,Yiyang Huang,Xinzhao Jiang,Yichang Xu,Wei Wang,Jie Wu,Liang Zhou,Kun Xi,Lixin Huang,Liang Chen
The healing of bone defects among diabetic patients presents a critical challenge due to the pathological microenvironment, characterized by hyperglycemia, excessive reactive oxygen species (ROS) production, and inflammation. Herein, multifunctional composite microspheres, termed GMAP are developed, using a microfluidic technique by incorporating Au@Pt nanoparticles (NPs) and GelMA hydrogel to modulate the diabetic microenvironment for promoting bone regeneration. The GMAP enables the sustained release of Au@Pt NPs, which function as bimetallic nanozymes with dual enzyme-like activities involving glucose oxidase and catalase. The synergistic effect allows for efficient glucose consumption and ROS elimination concurrently. Thus, the GMAP effectively protects the proliferation of bone marrow mesenchymal stem cells (BMSCs) under adverse high-glucose conditions. Furthermore, it also promotes the osteogenic differentiation and paracrine capabilities of BMSCs, and subsequently inhibits inflammation and enhances angiogenesis. In vivo diabetic rats bone defect model, it is demonstrated that GMAP microspheres significantly improve bone regeneration, as verified by micro-computed tomography and histological examinations. This study provides a novel strategy for bone regeneration by modulating the diabetic microenvironment, presenting a promising approach for addressing the complex challenges associated with bone healing in diabetic patients.
研究领域:
材料科学
·
生物医学工程
·
再生医学
·
纳米技术
·
糖尿病研究
✓ 已验证
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2023
·
IF 8.3
Lucheng Li,Jie Ni,Zehua Zhu,Xiaojun Zuo
A novel Mg-loaded chitosan carbonized microsphere (MCCM) was prepared for simultaneous adsorption of ammonium and phosphate in this study, through the investigation of preparation procedures, addition ratio, and preparation temperature. Pollutants removals by MCCM were more acceptable with 64.71% for ammonium and 99.26% for phosphorus, compared with chitosan carbonized microspheres (CCM), Mg-loaded chitosan hydrogel beads (MCH) and MgCl 2 ·6H 2 O. Addition ratio of 0.6:1 (m chitosan : m MgCl2 ) and preparation temperature of 400 °C in MCCM preparation were responsible for pollutant removal and yield. The effect analysis of MCCM dosage, solution pH, pollutant concentration , adsorption mode and coexisting ions on the removal for both ammonium and phosphate indicated that pollutants removals were increased with increasing MCCM dosages, and achieved the peak at pH 8.5, but presented to be stable with Na + , K + , Ca 2+ , Cl − , NO 3 − , CO 3 2− and SO 4 2− , except for Fe 3+ .Adsorption mechanisms discussion implied that simultaneous ammonium and phosphate removal with MCCM was attributed to struvite precipitation, ion exchange, hydrogen bonding, electrostatic attraction and Mg–P complexation, suggesting that MCCM presents a new way for simultaneous concentrated ammonium and phosphate removal in wastewater treatment .
研究领域:
环境科学
·
水处理
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Hailong Hu,Jinye Zhou,Hongyin Hu,Yu Wu,Jinyan Wang,Mingliang Du,Shuanglong Lu
Low-concentration nitrate (NO 3 − ) contamination has become a critical global challenge in water management, posing risks to both ecosystems and human health. Electrocatalytic NO 3 − reduction reaction (NO 3 RR) offers a sustainable and technologically viable strategy for the removal of NO 3 − at low concentrations. However, the practical application is severely hampered by mass-transport limitations and competing hydrogen evolution. Herein, we introduce a physical interfacial engineering strategy by coating commercial Cu foam with a covalent organic framework (COF) microsphere layer to enrich NO 3 − at the electrode-electrolyte interface and thereby enhance the catalytic performance of NO 3 RR at low concentrations. Notably, hollow COF microspheres with enclosed cavities create a confined microenvironment that promotes local nitrate accumulation without altering the intrinsic electronic properties of the Cu substrate. This interfacial architecture imparts a pronounced substrate-enrichment effect, sustaining sufficient local nitrate concentrations in dilute electrolytes. As a result, the adsorption and conversion of NO 3 − are significantly enhanced, and the current plateau due to diffusion limit is effectively mitigated. The optimized composite electrode delivers a maximum Faradaic efficiency of 84.6% and a nitrate removal rate of 63.3% h −1 at 5 mM NO 3 − , substantially surpassing bare Cu foam and setting a benchmark for low-concentration NO 3 RR. Operando Raman spectroscopy and finite element simulations corroborate the enhanced interfacial nitrate enrichment and reaction pathway. This work establishes structural enrichment as a general paradigm for overcoming diffusion-limited conditions in dilute-substrate electrocatalysis.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2026
·
IF 8.2
Shumiao Yu,Tao Tang,Jinxian Li,Caicai Xu,Yangfan Yu,Xi Xiao
Temperature is one of the most important factors driving cyanobacterial harmful algal blooms (CHABs). However, existing algicide designs rarely consider the influence of temperature on algal growth. Novel temperature-responsive sustained-release microspheres (T-SRMs) of anti-algal 5,4′-dihydroxyflavone (DHF) were designed using n -heptadecane as the temperature-responsive material, which can adjust DHF release behavior in response to temperature. Compared to DHF direct application, T-SRMs showed higher inhibition rates against Microcystis aeruginosa and sustained inhibitory activity at various temperatures (15-25 °C). The theoretical inhibition time of T-SRMs substantially exceeds that of conventional SRMs, with the potential to cover the entire CHABs outbreak period and extend the duration of validity. T-SRMs can accurately regulate DHF release rate based on water temperature. When the temperature is higher than the melting point of n -heptadecane (22 °C), the phase transition of heptadecane significantly promotes the DHF release rate. Moreover, salinity had no significant effect on the DHF release behavior, and the temperature-responsive materials can be adjusted to linearly regulate the release of DHF, which is favorable for the wide application of T-SRMs in freshwater, brackish and salt waters with flexible temperature windows. In addition, the T-SRMs had no apparent toxic effects on Chlorella vulgaris, Daphnia magna and Danio rerio . Our study has an important scientific significance to achieve a more intelligent, accurate and efficient control of CHABs.
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2026
·
IF 7.3
Qiong Wang,Feifei Yang,Xinru Chen,Yan Lu,Siqi Zhou,Yaxian Wang,Yuxin Yang,Tingting Wang,Hui Liu,Hui Song,Mengke Su,Honglin Liu
Spatially resolved quantification of agrochemical deposition, penetration, and absorption on and within fresh produce is critical for optimizing efficacy and managing residual risks. This study presents a hydrogel microneedle (MN)-based sensing platform that integrates surface-enhanced Raman scattering (SERS) with silver nanowire (AgNW) arrays. The platform overcomes the inherent limitation of conventional self-assembly methods, which rely on unstable biphasic interfaces, by elucidating a curing mechanism for liquid–liquid interface self-assembled nanostructures. This process enables a controllable transformation of dynamic interfacial assemblies into stable, solid plasmonic microspheres (PMSs). These PMSs function as high-performance SERS units, exhibiting uniform dispersion, long-term stability, and a reproducible electromagnetic hotspot distribution, thereby addressing the signal irreproducibility associated with random nanoparticle encapsulation in MNs. Subsequent integration of the PMSs into a polyethylene glycol diacrylate (PEGDA) hydrogel yields mechanically robust MN arrays with tunable swelling properties. This design confers an integrated pierce–extract–detect functionality, enabling rapid agrochemical screening. For the common pesticide molecules thiram and thiabendazole (TBZ), in the theoretical system, the limits of detection (LODs) are 3.47 × 10–10 M and 8.81 × 10–8 M, respectively. When coupled with SERS mapping technology, the platform facilitates two-dimensional and three-dimensional visualization of pesticide distribution on and within fresh produce, revealing spatial patterns governed by multifactor synergy. This work underscores the significant potential of the developed SERS platform in agrochemical residue detection and distribution analysis, opening new avenues for applications in food safety monitoring and sustainable agrochemical development.
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）