CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Huiling Ding,Mengke Zhang,Yan Liu,Yize Yao,Zenghui Mai,Huaixin Zheng,Bo Song,Bingbing Fan,Hailong Wang,Hongxia Lu
With the rapid development of global economy and industrialization, the management and protection of water resources have become increasingly important. In this paper, a novel three-dimensional Chitosan/Fe 3 O 4 /TiO 2 @MXene photocatalyst with excellent degradation and bacterial inhibition properties was prepared by a simple one-step hydrothermal method using FeCl 3 ·6H 2 O, Chitosan (CS) and MXene (Ti 3 C 2 ) as main raw materials. TiO 2 was generated in-situ on the surface of Ti 3 C 2 nanosheets and modified by loading Fe 3 O 4 nanoparticles and CS films. The conformations and band gaps of the composites were modified, and then photocatalytic mechanisms, phase compositions, morphological structures, magnetic properties and photoelectrochemical properties of the photocatalysts were systematically analyzed. The degradation efficiency of the CS/Fe 3 O 4 /TiO 2 @Ti 3 C 2 composite photocatalyst can reach 95.9 % when the ration of CS to FeCl 3 ·6H 2 O is 1:3 and the hydrothermal temperature is 180 °C, which showing excellent photocatalytic performance. Meanwhile, the inhibition rate of Staphylococcus aureus ( S. aureus ) is close to 98.91 % under the light condition. This study further reveals that visible light is a cost-effective way to treat pollution in terms of degradation and bacteriostatic inhibition, and the composite photocatalysts can be efficiently recycled and reused under the action of a magnetic field.
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高影响因子
Small
·
2024
·
IF 13
Lin Mei,Wenchong Ouyang,Limin Xu,Yuanlong Huang,Qi Liu,Yu Bai,Quanming Lu,Tianzhi Luo,Zhengwei Wu
Hydrogels present significant potential in flexible materials designed for electromagnetic interference (EMI) shielding, attributed to their soft, stretchable mechanical properties and water-rich porous structures. Unfortunately, EMI shielding hydrogels commonly suffer from low mechanical properties, deficient fracture energy, and low strength, which limit the serviceability of these materials in complex mechanical environments. In this study, the double network strategy is successfully utilized along with the Hofmeister effect to create MXene/PAA (polyacrylic acid)-CS (chitosan) hydrogels and further strengthen and toughen the gel with (NH 4 ) 2 SO 4 solution. The gel exhibits enhanced functionalities such as outstanding stretchability, excellent strain sensitivity (11.66), and super fracture energy (≥9 kJ m −2 ). Notably, it demonstrates outstanding shielding effectiveness of 73.8 dB in the terahertz (THz) range, and the shielding properties can be effectively tuned by varying the MXene content, the (NH 4 ) 2 SO 4 concentration, and the thickness of the hydrogel. Additionally, the gel shows robust and superior shielding effectiveness after repeated stretching and long-term dehydration. The MXene/PAA-CS double-network (DN) hydrogels would be an excellent candidate for EMI shielding materials in advanced flexible electronic equipment and soft robots.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Yipeng Yan,Cheng Liu,Chuan Shan,Jingsong Xu,Kaiyue Tang,Tao Liu,Xin Chen,Tao Duan
Membrane separation is an efficient purification way to treat large quantities of oily wastewater. The core challenge of membrane separation technology in practical applications is to address membrane fouling and establish sustainable separation capabilities. A super-hydrophilic and self-cleaning nanofibrous membrane is designed and prepared in a large-scale, cost-effective and environmentally friendly process for oily wastewater efficient purification. The polyacrylonitrile/chitosan (PAN/CS) matrix membrane material prepared by co-electrospinning method has excellent self-cleaning ability after amorphous titanium dioxide coating (PAN/CS/Ti). The PAN/CS/Ti membrane not only shows super hydrophilicity (WCA ∼ 0°) and underwater super oleophobicity (UWOCA ∼ 153°) but also exhibits excellent chemical stability even in harsh environments without sacrificing separation performance. Due to the uniform modified micro-nanoporous structure, PAN/CS/Ti membrane has significant gravity-driven separation flux with high efficiency and excellent reusability for surfactant-free and surfactant stabilized oil-water emulsion. In addition, PAN/CS/Ti membrane also shows outstanding separation performance with flux > 2200 L·m −2 ·h −1 for high concentration oil-water emulsions (oil content above 20 %). Overall, this study prepared the super-hydrophilic and self-cleaning PAN/CS/Ti nanofibrous membrane by a simple and scalable approach with outstanding separation performances, which can be widely used in various emulsion separation, and practically as the effective solution for oily wastewater treatment.
研究领域:
环境科学
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材料科学
·
膜分离技术
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纳米材料
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表面工程
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水处理技术
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高影响因子
Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 47
·12422-12429
·
IF 5.256
T. T. Deng,E. H. Song,Y. Y. Zhou,L. Y. Wang,Q. Y. Zhang
Three isotypic double perovskites A2BAlF6:Mn4+ (A = Rb, Cs; B = K, Rb) were synthesized via a facile co-precipitation method at room temperature. XRD Rietveld refinements and Raman spectra indicate that the neighboring smaller A-site or larger B-site cation in A2BAlF6:Mn4+ lowers structural stability, but suppresses the [AlF6] octahedron to increase the crystal field strength and bond strength of the Al–F bond. Cs2KAlF6:Mn4+ presents a sharp line red light and excellent moisture resistance, but experiences severe thermal quenching. In comparison, altering the A- or B-site cation to Rb, Rb2KAlF6:Mn4+ and Cs2RbAlF6:Mn4+ shows blue shifts in emission and declining water resistance, but enhancements in thermal stability. A combination of static and dynamic emission degradations demonstrates that the water resistance of Mn4+ emission mainly relies on the structural stability of the host matrix; meanwhile, the thermal stability highly depends on the rigidity of its local accommodation. The variations of the temperature-dependent white light-emitting diode (WLED) performances further evidence their sufficient thermal stability for LED applications. These findings suggest that neighboring-cation modulation might be a feasible guideline for exploiting stable Mn4+-activated fluoride red phosphors in warm WLED applications.
研究领域:
材料科学
·
光学
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高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 17
·6638-6645
·
IF 4.569
Lin-Tao Jiang,Ming-Ze Li,Xiao-Ming Jiang,Bin-Wen Liu,Guo-Cong Guo
Mixed-anionic compounds have caught considerable attention due to their flexible coordination manners and abundant physical properties. Four new chalcohalides RbIn4S6Cl (1), CsIn4S6Cl (2), Pb5Sn3S10Cl2 (3) and Pb5Sn3Se10Cl2 (4) were successfully obtained by the high-temperature halide salt flux method. Compounds 1 and 2 have layered structures that consist of octahedral InS6 and aliovalent-anionic InS3Cl units. Compounds 3 and 4 feature 3-D structural frameworks built by [Pb4SnQ8Cl4]6− and [PbSn2Q6]2− (Q = S and Se) polyhedral chains, in which partial Pb2+ cations are coordinated by Q2− and Cl− anions. Compounds 1–4 have optical band gaps close to the wavelength range of visible light and exhibit significant photocurrent responses of 28.75 nA cm−2, 55.12 nA cm−2, 19.58 mA cm−2, and 36.12 μA cm−2 with on/off ratios 30.0, 2.5, 15.7 and 2.6, respectively, implying their potential for photovoltaic applications. To the best of our knowledge, compound 3 has the largest photocurrent response among all non-oxides. In addition, the activation energies of 1–4 are well below 0.3 eV, which makes these compounds interesting for potential applications in electrochemical devices. This work sheds light on the exploration of promising photocurrent response materials in the mixed-anionic compound system.
研究领域:
材料科学
·
物理化学
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高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yi-Yu Liao,Jian-Rong Li,Bo Zhang,Hai-Yan Sun,Wen Ma,Jian-Ce Jin,Mei-Ling Feng,Xiao-Ying Huang
It is imperative yet challenging to efficiently sequester the 137Cs+ ion from aqueous solutions because of its highly environmental mobility and extremely high radiotoxicity. The systematical clarification for underlying mechanism of Cs+ removal and elution at the molecular level is rare. Here, efficient Cs+ capture is achieved by a thioantimonate [MeNH3]3Sb9S15 (FJSM–SbS) with high capacity, fast kinetics, wide pH durability, excellent β and γ radiation resistances, and facile elution. The Cs+ removal is not significantly impacted by coexisting Na+, K+, Ca2+, Mg2+, and Sr2+ ions which is beneficial to the remediation of Cs+-contaminated real waters. Importantly, the mechanism is directly illuminated by revealing an unprecedented single-crystal to single-crystal structural transformation upon Cs+ uptake and elution processes. The superior Cs+ removal results from an unusual synergy from strong affinity of soft S2– with Cs+, easily exchangeable [MeNH3]+ cations, and the flexible and robust framework of FJSM–SbS with open windows as trappers.
研究领域:
材料科学
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环境科学
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放射化学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF CHEMICAL KINETICS
·
2026
·Vol. 58
·期 3
·106-118
·
IF 1.6
Chenyang Xu,Wenzhu Li,Linyi Zhang,Jiakai Xu,Peng Han,Bin Chen
Poly(chitosan)/hydroxyapatite (CS/HA) and carboxymethyl poly(chitosan)/hydroxyapatite (CMCS/HA) composite coatings were successfully fabricated via biomimetic mineralization, with their structural characteristics and properties systematically analyzed. As the CS concentration increased during fabrication, the growth morphology of CS/HA coating transitioned from clustered to sheet-like structures, forming dense and uniform composite coating with strong substrate adhesion and excellent biocompatibility. The CMCS/HA coatings exhibited a coral-like structure comprising spherical particles, which ensured higher substrate coverage and demonstrated superior corrosion resistance. At 20 g/L, coatings prepared by mixing pre-calcified solution A with CMCS and then adding biomimetic mineralization solution A (defined as YOCS), or by mixing pre-calcified solution A with a mixture of biomimetic mineralization solution A and CMCS (defined as FOCS), both show optimum structure. Coatings incorporating 30 g/L CS or 20 g/L CMCS in the biomimetic mineralization solution exhibited optimum corrosion resistance, antibacterial activity, and biocompatibility.
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高影响因子
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
·
2024
·Vol. 46
·期 2
·1-19
·
IF 3.2
Yu Weiwei,Li Yueqi,Shu Minghui,Liu Cong,Liang Yue,Mao Yufeng,Tan JiangLin,Liu Yang,Ai Ting
Tetracycline becomes a crucial measure for managing and treating communicable diseases in both human and animal sectors due to its beneficial antibacterial properties and cost-effectiveness. However, it is important not to trivialize the associated concerns of environmental contamination following the antibiotic's application. In this study, cobalt ferrate (CoFe 2 O 4 ) nanoparticles were loaded into chitosan (CS), which can avoid the agglomeration problem caused by high surface energy and thus improve the catalytic performance of cobalt ferrate. And it can avoid the problem of secondary contamination caused by the massive leaching of metal ions. The resulting product was used as a catalyst to activate peroxymonosulfate (PMS) for the degradation of tetracycline (TC). To determine the potential effects on TC degradation, various factors such as PMS dosing, catalyst dosing, TC concentration, initial solution pH, temperature, and inorganic anions (Cl − , H 2 PO 4 − and HCO 3 − ) were investigated. The CS/CoFe 2 O 4 /PMS system exhibited superior performance compared to the CoFe 2 O 4 -catalyzed PMS system alone, achieving a 92.75% TC removal within 120 min. The catalyst displayed high stability during the recycling process, with the efficiency observed after five uses remaining at a stable 73.1%, and only minor leaching of dissolved metal ions from the catalyst. This confirms the high stability of the catalyst. The activation mechanism study showed that there are free radical and non-free radical pathways in the reaction system to degrade TC together, and SO 4 •− and 1 O 2 are the primary reactive oxygen radicals involved in the reaction, allowing for effective treatment of contaminated water by TC.
研究领域:
环境科学
·
材料科学
·
催化
·
纳米技术
·
化学工程
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DOI
高影响因子
Food Chemistry-X
·
2026
·
IF 9.2
Xingjun Lu,Kun Qiao,Xinyan Liu,Xiaozhen Peng,Bangzhu Peng
Postharvest Stropharia rugosoannulata deteriorates from fungal infection and active metabolism. A novel chitosan/nitrogen doped titanium dioxide/natamycin (CS/N TiO₂/NT) composite film was developedinhibiting Fusarium pseudoanthophilum and Talaromyces purpureogenus by 71.30% and 75.04%, with 132.20% higher tensile strength and 69.29% lower oxygen permeability. Preservation efficacy was markedly temperature dependent. At 25 °C, only marginal improvements were observed. At 10 °C, the coating significantly reduced total colony counts and modulated enzymatic activities, notably activating peroxidase, retarding the decline of superoxide dismutase (SOD), and inhibiting polyphenol oxidase. Optimal preservation was achieved at 4 °C, where respiratory intensity and microbial proliferation were suppressed while SOD activity was effectively sustained. Cox proportional hazards analysis further confirmed that coated samples stored at 4 °C exhibited a 33.33%–38.46% extension in storage life relative to uncoated controls. These findings establish a temperature responsive preservation strategy and provide a mechanistic framework for extending the shelf life of perishable mushrooms.
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高影响因子
Journal of Macromolecular Science Part B-Physics
·
2026
·
IF 1.7
Guijuan Li,Enhui Wang,Kangkang Zhao,Wei Xia,Fuli Tian,Yanqiang Li
This study develops a PCL-HAP/CS bilayer membrane to address limitations in current bone regeneration materials. Traditional single-component materials often exhibit poor biocompatibility, mechanical mismatch, and insufficient osteogenic capacity. To overcome these issues, a composite structure was engineered by combining hydroxyapatite (HAP) synthesized via co-precipitation and silane-treated for enhanced compatibility, polycaprolactone (PCL) for mechanical strength, and chitosan (CS) for bioactivity. The bilayer design features a PCL-HAP layer fused with a CS layer, mimicking natural bone’s stratified architecture. Material characterization confirmed the composite’s structural integrity and functional properties. In vitro tests demonstrated selective cell compatibility: osteoblasts thrived on the mineral-rich PCL-HAP side, while fibroblasts showed enhanced adhesion on the CS layer. Rat skull defect experiments revealed dual functionality—the membrane provided mechanical support for bone regeneration while delivering antibacterial effects to surrounding soft tissues. The synergistic combination leverages PCL’s durability, HAP’s osteoinduction, and CS’s antimicrobial properties, effectively compensating for individual material weaknesses. This asymmetric membrane design shows significant potential for clinical bone repair applications, particularly in oral surgery, by simultaneously addressing hard tissue regeneration and soft tissue protection requirements.
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高影响因子
Materialia
·
2025
·
IF 2.9
Jiaxuan Wang,Jun Pan,Han Wu
This study aims to develop PVDF composite membranes with excellent comprehensive performance by hydrophilic modification of PVDF membranes. Specifically, polyvinylpyrrolidone (PVP) was used as a porogen and dispersing agent, while β-cyclodextrin (β-CD) and chitosan (CS) served as hydrophilic modification agents. A novel β-CD/CS/PVDF composite membrane was prepared using a blending phase transformation method. This membrane exhibits excellent hydrophilicity, underwater superoleophobicity, mechanical strength, self-cleaning ability, antibacterial performance, high separation performance, and biocompatibility. The experimental results indicate that the modified membrane with the optimal ratio (MF-β/C-2/3) achieved a pure water flux of 721.79 L·m −2 ·h −1 ·bar −1 , an underwater oil contact angle exceeding 140°. The membrane exhibited exceptional retention and separation capabilities for various concentrations of MB, MG, RB, MO, Pb 2+ , and Cr 6+ . It achieved a separation efficiency exceeding 99% for both oil-water mixtures and oil-water emulsions, and also demonstrated excellent separation performance when treating simulated wastewater containing multiple pollutants. In addition, ten cycles of separation experiments were conducted for organic dyes, heavy metal ions, oil-water mixtures, oil-water emulsions and simulated wastewater respectively. The results showed that after ten cycles of reuse, the modified membrane retained good separation efficiency and water flux, demonstrating exceptional separation stability. Research has shown that PVDF composite membranes have a promising prospect in the treatment of printing and dyeing wastewater. They can simplify the process flow, reduce costs, efficiently intercept pollutants, increase operational stability, and improve treatment efficiency. They have important practical significance in promoting the resource utilization of printing and dyeing wastewater.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xiaomin Feng,Huijin Xu,Lingling Bai,Jiyuan Yang,Wenge Yang,Yonghong Hu
In this study, astragalus polysaccharide / hydroxypropyl-β-cyclodextrin (APS@HP-β-CD) was efficiently loaded into polycaprolactone/chitosan (PCL/CS) by electrospinning and encapsulation techniques. Then, using Span80 as an emulsifier, PCL/CS/APS@HP-β-CD nanofibers were produced through electrospinning of water-in-oil emulsions. The physicochemical and antimicrobial properties of the nanofibrous materials were subsequently evaluated in vitro. Compared with the PCL/CS nanofiber membranes (PC membrane) without added active substances, the tensile test showed that the flexibility of the PCL/CS/APS@HP-β-CD nanofiber membrane (PCA membrane) was significantly enhanced. The thermodynamic test results show that the thermal stability of the PCA membrane is enhanced. The results of 1 H NMR, FTIR, and XRD showed that APS was successfully encapsulated in HP-β-CD. The biodegradation test results showed that the PC and PCA nanofiber membranes had no pollution to the environment and could biodegrade. In addition, PCA membranes exhibited strong antibacterial activity against both Gram-positive and Gram-negative bacteria as well as outstanding free radical scavenging capacity. The APS release mechanism was determined through the Higuchi and Korsmeyer-Peppas kinetic models. Among all the PCA nanofiber membranes, the APS release was more consistent with the Korsmeyer-Peppas kinetic model, and the transport mechanism was Fickian diffusion. Finally, this study also optimized the experimental protocol by introducing carboxymethyl groups to modify PCL/CS nanofiber membranes by chemical grafting. In conclusion, the PCA nanofibrous membranes prepared in this study have a strong potential to become wound dressings.
研究领域:
材料科学
·
生物医学工程
·
药剂学
·
纳米技术
·
高分子科学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）