JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Jiasheng Wei,Lei Dai,Ping He,Meng Zhu,Feng Jiang,Zhaoxiang Zhou,Guiqiang Fei,Tingzhou Lei
MXene-contained paper is a good choice to design ultrathin and flexible electromagnetic interference (EMI) shielding materials. However, the deficiencies in strength and stability of MXene-contained paper impede its practical applications. Herein, a composite paper was proposed to address the problems, in which a filter paper was modified with a three-layer structured surface via a facile layer-by-layer coating procedure. Specifically, the TEMPO-oxidized cellulose nanofibers (TOCN)/cationic starch (CS)/MXene gel layer and TOCN/MXene nacre structure layer ensured the good EMI shielding and mechanical performances of the composite paper, while the uppermost TOCN/CS hydrogel film layer mainly protected MXene. The composite paper achieved an EMI SE of 40.3 dB at a thickness of merely 0.1894 mm (SE/ t value of ca. 212.8 dB mm −1 , SSE/ t values of ca.13216 dB cm 2 g − 1 ) and the total MXene dosage was 20 g m − 2 . Its tensile strength could be up to 11.7 MPa while the original filter paper was 6.4 MPa. Four pieces of this composite papers could be easily packed together to attain an EMI SE of nearly 70 dB. Importantly, the hydrogel film layer efficiently protected the MXene and maintained the EMI shielding performance of the composite paper when immersed in different liquids including water, HCl (1 M) and ethanol, due to the dense and compact structure of hydrogel film layer. This work provides a practical way to develop ultrathin, flexible and durable EMI shielding materials.
研究领域:
材料科学
·
纳米技术
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Xiaomin Tang,Ting Huang,Shixin Zhang,Wei Wang,Huaili Zheng
Hematite wastewater containing dissolved heavy metals is a potential threat to eco-environment and human health. Flocculation as an efficient and cost effective water treatment technology should be applied in its treatment. A sulfonated chitosan-based flocculant (CS-g-P(AM-AMPS)) was prepared via graft copolymerization. Two synthesis pathways and reaction products with different molecular structure were discovered in processes. CS-g-P(AM-AMPS) possessed the multifarious functional groups that contributed to its excellent performance in hematite wastewater treatment. Bridging, adsorption and entrapment in coagulation-flocculation were enhanced due to CS-g-P(AM-AMPS), and the impressive floc size and high removal efficiency were represented in the treatment as well. Dissolved heavy metals in the wastewater were removed by the chelation of sulfonate group in CS-g-P(AM-AMPS), the adsorption of other functional groups and the co-settlement with flocs. CS-g-P(AM-AMPS) will have the potential application in industrial wastewater treatment for its high flocculation performance, thermal stability and solubility.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
Solar RRL
·
2026
·Vol. 10
·期 6
·e70324
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IF 4.8
Zhicheng Wang,Xiaoshan Li,Kaipeng Chen,Zhipeng Fu,Guangmian Jiang,Yanlin Li,Linhu Xiang,Xin Liu,Tian Hou,Wanqi Luo,Pingping Yang,Xiaoran Sun,Meng Zhang
In the research of perovskite solar cells (PSCs), the introduction of passivation layers is a key strategy for enhancing both efficiency and stability. Employing the well-established dip-coating method in conjunction with effective passivation solutions for the preparation of passivation layers not only improves the power conversion efficiency (PCE) and stability of PSCs but also extends the applicability of this approach in the development and commercialization of PSCs. This work introduces a novel passivation method, termed the DATsO-TBA-Dip coating (DTD) passivation method, which combines DATsO, 2-butanol (TBA), and the dip-coating method. The DTD passivation method was applied to PSCs on glass substrates of different sizes (2 cm × 1.6 cm and 2.5 cm × 2.5 cm). The results demonstrated excellent film quality and significant enhancement in passivation performance. The optimized device achieved a maximum PCE of 22.5% (0.105 cm 2 ), representing a 2.2% improvement over the best-performing untreated device. Additionally, the open-circuit voltage ( V OC ) increased to 1.08 V, and the fill factor (FF) improved to 80.9%. Beyond the remarkable photoelectric performance, devices treated with the DTD passivation method also exhibited significantly improved stability, retaining 80% of the initial PCE after 1200 h.
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高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2025
·Vol. 26
·期 10
·4643
·
IF 4.9
Tingqiang Yan,Kang Chen,Xiaodong Wang,Yingjie Qiao
Polylactic acid (PLA) exhibits remarkable biocompatibility and biodegradability, rendering it a highly promising material for applications in packaging and disposable products. However, its inherent brittleness, low melt strength, and slow crystallization rate significantly restrict its practical uses. Our previous studies have shown that incorporating the ADR chain extender can yield chitosan–polylactic acid–ADR (CS/PLA-ADR) composites with outstanding antibacterial properties, enhanced biodegradability, and the capability to effectively block water vapor and oxygen. However, the low elongation at break (less than 10%) limits its application in scenarios that require high ductility. To enhance the toughness of the CS/PLA-ADR composites, the flexible biodegradable polybutylene succinate (PBS) is innovatively introduced. The mechanical properties of PBS can be compared with polyethylene and polypropylene, providing high strength and toughness. The mechanism of introducing PBS is to construct a good, toughened structure through the flexible structure of PBS in collaboration with ADR toughening agent, achieving a balance between strength and toughness in CS/PLA-ADR-PBS composites. The incorporation of PBS is anticipated to improve the ductility of CS/PLA-ADR composites. This study systematically investigates the effects of varying PBS content (0–30%) on the properties of CS/PLA-ADR-PBS composites, aiming to determine the optimal PBS content and elucidate the mechanism by which PBS enhances the overall performance of the composites. The results indicate that when the PBS content is 20%, the composites exhibit optimal overall properties. This research provides a theoretical foundation and technical support for the development of environmentally friendly and sustainable packaging materials, offering significant research value and broad application prospects.
研究领域:
材料科学
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生物医学工程
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qingyuan Zhang,Kai Chen,Qin Chen,Wenlu Hang,Haiyan Feng,Xinyue Zhang,Cunao Feng,Xiaowei Li,Dekun Zhang,Shirong Ge
Flexible sensing materials have emerged as pivotal tools for human health monitoring and motion detection. However, single-functional flexible sensors currently suffer from insufficient versatility to address complex detection demands, particularly in multifaceted application scenarios such as real-time physiological signal monitoring and environmental gas sensing. Herein, a strategy of using PVA and CS as matrix materials is reported to fabricate strain/gas multifunctional flexible hydrogels, which are endowed with ionic conductivity and mechanical robustness via immersion in LiCl electrolyte solution. The as-prepared PVA 7 /CS 3 -LiCl 1.5 hydrogel exhibited remarkable strain sensitivity with response values of 6.5 % (tensile) and − 24 % (compressive) at 8 % strain. After 200 cycles of stretching, the relative resistance remained stable, demonstrating superior mechanical stability and cyclic durability. And relative resistance change (ΔR/R₀) showed linear dependence on strain, with gauge factors (GFs) of 0.45 (1–7 % strain), 2.66 (7–10 % strain), and 0.93 (10–90 % strain), respectively. Optimal performance was achieved at 3 wt% CS and 1.5 mol/L LiCl, where the hydrogel exhibited a 2.5 % response to 20 ppm acetone with 5-fold higher selectivity than benzene, ethanol, and ammonia. These multifunctional hydrogels enable versatile room-temperature applications, particularly for human physiological signal monitoring, offering promising strategies for sensing materials in complex environments.
研究领域:
材料科学
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柔性电子学
·
传感器与执行器
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可穿戴设备
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健康监测技术
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Sain Bux Jamali,Tauqeer Haidar Qamar,Sibt ul Hassan,Nouman Ahmed,Ijaz Ahmad,Pengkun Xia,Shakeel Ahmad,Shengxiang Huang,Lianwen Deng
The escalating demand for effective electromagnetic interference shielding, particularly in the challenging low-frequency microwave range such as S-band, underscores the need for advanced high-performance electromagnetic absorbing materials. Herein, three-dimensional (3D) nickel/nitrogen-doped porous carbon foam decorated with carbon spheres (3D Ni/NPCF@CS) was synthesized for S-band microwave absorption. This unique design capitalizes on the synergistic interplay between the highly conductive and porous 3D carbon skeleton, the magnetic properties of encapsulated Ni nanoparticles, and the enhanced interfacial polarization provided by the conductive polypyrrole coating. This engineered hierarchical architecture created abundant heterogeneous interfaces and microwave loss pathways. Detailed electromagnetic analysis revealed that the optimized Ni/NPCF@CS composite material exhibited exceptional reflection loss (RL) performance of −57.8 dB at 3.44 GHz. The dominant absorption mechanisms, including dielectric loss from dipole polarization, conductive loss, and magnetic loss from Ni nanoparticles, were thoroughly investigated and discussed. This study provides valuable insights into the development of 3D-foam-based microwave-absorbing materials, particularly for their practical implementation in the S-band.
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高影响因子
MATERIALS SCIENCE FORUM
·
2024
·
IF 0
Ha Nguyen Phuong,Duyen Nguyen Thu,Nguyen Thanh Liem,Vu Anh Doan
Chitosan (CS), with its non-toxic and antibacterial properties, and Poly(ε-caprolactone) (PCL), known for its biodegradability and biocompatibility, are crucial materials in medical applications. This study proposed a solution utilizing electrospinning to manufacture fibers with nanometer-sized core-shell structures from these materials, with CS serving as the fiber core and PCL forming the shell. The influence of manufacturing technology parameters on fiber size and morphology was thoroughly researched and investigated. The solvent system used, Chloroform/Dimethylformamide (DMF), ensured complete solubility, viscosity control, conductivity, and proper solvent evaporation. Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM) results clearly demonstrated the morphology and internal structure of the nanofibers. The water contact angle (WCA) measurements of the fiber membrane showed almost no significant change over time, indicating strong hydrophobicity of the nanofibers. Additionally, the FTIR spectrum revealed distinct core-shell layers without any blending between them, while DSC analysis showed the thermal properties of fiber membranes. In summary, the electrospinning of nanofibers proved to be stable, producing thin fibers with an average diameter of approximately 400 nm. These findings are expected to significantly enhance the applicability of CS/PCL nanofibers across various fields, including healthcare and smart agriculture.
研究领域:
生物材料
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医学工程
·
纳米技术
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DOI
Nature Communications
·
2026
·
IF 18.1
Zhang Yu,Liu Haidi,Zhang Shuchun,Yang Zhengwei,Chang Qingda,Xu Lixin,Yan Yongli,Zhang Chuang
The interplay of slow spin relaxation (long τ S ) and fast radiative recombination (short τ R ) is essential for using spin-polarized excited states in lead halide perovskites towards spintronics and quantum-optics technologies. Herein, we report on the observation of simultaneously long τ S (59.8 ps) and short τ R (3.4 ns) in the colloidal nanocrystals of high-entropy perovskites, Cs(PbMgZnCd)Br 3 , which enables the optical access and spin manipulation of excited states at room temperature. The incorporation of non-Pb metals spatially separates the [PbBr 6 ] 4− framework into smaller domains below the Bohr radius of excitons, and the size confinement leads to blue-shifted bright photoluminescence from short-lived photoexcitation species. Moreover, the distortion of [PbBr 6 ] 4− lattice is significantly enhanced in high-entropy structures, which enlarges the Rashba spin splitting and consequently prolongs τ S over an order of magnitude. Optical write-in and read-out of spin states via circularly polarized light are achieved for both photoluminescence and amplified spontaneous emission from Cs(PbMgZnCd)Br 3 . Optical Hanle effect is demonstrated and allows for very efficient spin manipulation (positive/negative polarizations ~25.8%) under a perpendicular magnetic field, showing the great potential of high-entropy perovskites for opto-spintronic applications.
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DOI
PubMed
高影响因子
Results in Engineering
·
2025
·
IF 7.9
Qing Jing,Jian Ye,Sili Chen,Xukai Li,Liang Guo,Weimin Zheng,Jinsong Wang,Yanjiao Gao
Radioactive wastewater discharge increased continuously with the widespread utilization of nuclear energy around the world, among which 137 Cs is one of the most critical radionuclides requiring removal. Traditional Lind Type A (LTA) zeolite exhibits promising adsorption potential for ¹³⁷Cs, however its slow adsorption kinetics remains a limitation. A hierarchically porous LTA zeolite (JLTA) via modification with Dimethyl Diallyl Ammonium Chloride (DMDAAC) was developed. Mesopores of JLTA were constructed effectively via hydrophobic groups of DMDAAC while preserving its intrinsic micropores, which was confirmed by XRD, SEM-EDS, BET, and FT-IR. Optimal conditions of JLTA’s adsorption performance (pH = 6, dosage = 5 g/L, T = 298 K) was gained during systematic investigations under varying pH, dosage, contact time, initial Cs⁺ concentration, and temperature. Cs⁺ adsorption by JLTA was primarily due to ion exchange with supplementary electrostatic attraction, following monolayer adsorption, which was revealed via kinetic models, adsorption isotherms, and characterization analyses. The intra-particle diffusion-controlled process achieved equilibrium within 5 min, demonstrating remarkably accelerated kinetics. A maximum adsorption capacity of 249.390 mg/g of JLTA was exhibited.
研究领域:
环境科学
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材料化学
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核化学
·
吸附技术
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DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2016
·Vol. 43
·期 1
·341-352
·
IF 1.833
Sun Guangyao,Li Wenjing,Ji Shidong,Cao Xun,Jin Ping
Methanol was used to optimize the solid-state synthesizing method of alkali metavanadates AVO 3 (A = Rb, Cs) for the first time and the benefits are discussed. Due to the optimization, four kinds of heterogeneous AVO 3 compounds, white CsVO 3 [CsVO 3 (W)], yellow CsVO 3 [CsVO 3 (Y)], white RbVO 3 [RbVO 3 (W)], and red RbVO 3 [RbVO 3 (R)], could be easily obtained. The colored compounds CsVO 3 (Y) and RbVO 3 (R) are reported for the first time and their synthetic process has been summarized, while their crystal structure, morphology, vibration spectroscopy, photoluminescence, moisture adsorption and thermodynamic properties were measured and compared to white compounds. The differences in properties of CsVO 3 (Y) and RbVO 3 (R) were hypothesized as the oriented growth and induced defects. All four AVO 3 compounds were excellent white-light-emitting phosphors, and CsVO 3 (Y) and RbVO 3 (R), with additional waterproofness, suggested much more practical value.
研究领域:
无机化学
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材料科学
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固体化学
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发光材料
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物理化学
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DOI
高影响因子
MATERIALS LETTERS
·
2017
·
IF 2.572
Xue Yang,Yanjiao Zhao,Hassan Mussana,Mengistu Tessema,Lifang Liu
The chitosan (CS)/cellulose nanocrystal (CNC) (0, 0.2. 0.5, 0.8 and 1 wt%) nanocomposites were applied as modifier, and then deposited on the surface of cotton fabric via a pad-dry-cure method. The morphology, mechanical, hydrophilicity and ultraviolet (UV)-blocking properties of prepared fabrics were carefully investigated. The results showed that CS/CNC could obviously enhance the UV-blocking property of cotton fabric. CS/CNC0.5 fabric exhibited the most excellent UV-blocking property as well as good washing durability after 30 times water laundering, indicating CS/CNC could be used as efficient and durable UV blocker for cotton fabric. In addition, CS/CNC also can increase the mechanical property of cotton fabric; while decrease the hydrophilicity of cotton fabric.
研究领域:
纺织材料学
·
高分子化学
·
纳米材料科学
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DOI
高影响因子
Journal of Biomedical Nanotechnology
·
2017
·Vol. 13
·期 10
·1253-1259
·
IF 4.521
Liu Yuan,Lai Yuxuan,Yang Gaojian,Tang Congli,Deng Yan,Li Song,Wang Zunliang
An ultrasensitive aptamer electrochemical biosensor based on glass carbon electrode (GCE) modified with chitosan (CS), gold nanoparticles (AuNPs) and aptamer has been successfully constructed and used to detect cadmium ions (Cd2+). The poly-(diallyl dimethyl ammonium chloride)
(PDDA) was applied to neutralize Cd-aptamer via electrostatic interaction. The presence of Cd2+ would trigger Cd-aptamer conformation change causing the Cd/Cd-aptamer complex to adsorb more electrochemical signal indicator [Ru(NH3)6]3+ instead of
PDDA. Through differential pulse voltammetry (DPV) detection, the peak current increased along with the increase in concentration of Cd2+, and the linear ranges were from 0.001 nM to 100 nM (1.124 × 10–13 g/mL to 1.124 × 10–8 g/mL) with
the detection limit as low as 0.04995 pM (5.614 ×10–15 g/mL). The proposed biosensor exhibited good stability, high sensitivity and selectivity towards Cd2+. Furthermore, this Cd-aptamer biosensor was demonstrated in testing Cd2+ in tap water samples
with satisfactory results.
研究领域:
分析化学
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环境科学
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纳米技术
·
生物传感器
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DOI
高影响因子
危险品化学品经营许可证（带存储）