JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2025
·Vol. 36
·期 30
·1-16
·
IF 2.8
Chen Yuxiao,Jiang Yongle,Gan Fangyu,Zhong Yan,Yao Qingrong,Cheng Lichun,Lu Zhao,Qin Haiqing,Wang Jiang,Huang Yuxuan
Microwave absorption materials can achieve superior performance through the implementation of effective strategies such as morphology and composition design. In this study, a straightforward hydrothermal approach was employed to synthesize FeCo/Co@C composites with a dandelion-like morphology. Subsequently, the investigation focused on systematically examining the influence of carbon content and pyrolysis temperature on the microstructure, phase composition, and microwave absorption performance. The findings indicate that at a glucose of 3 mmol and pyrolysis temperature of 700 ℃, FCC2 exhibit a significant reflection loss (RL) of –51.13 dB, accomplished through the utilization of an exceptionally slim matching thickness measuring only 1.4 mm, additionally, optimal effectiveness across a bandwidth of 5.0 GHz can be attained at 1.5 mm. The remarkable ability of FCC2 samples to absorb microwaves can be credited to the distinctive structure resembling a dandelion and precise matching of magneto-dielectric elements. Consequently, these FeCo/Co@C composites show great potential as lightweight, high-performance microwave absorbers, offering a simple and efficient strategy for designing broadband absorption materials.
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JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Wenjie Li,Pengfei Mao,Xuwen Chen,Wanting Ling,Chao Qin,Yanzheng Gao
Developing efficient passivating sorption materials for the treatment of combined pollution by phthalate esters (PAEs) and Cd 2+ has become a critical focus in environmental protection and soil remediation. In this study, biochar-sulfhydryl modified montmorillonite composites (BC-SHMMT) were synthesized, characterized, and evaluated for the co-sorption of PAEs (DMP, DEP) and Cd 2+ . The integration of sulfhydryl-modified montmorillonite (MMT-SH) with biochar improved the material's surface structure, enhancing both co-sorption capacity and structural stability. Molecular dynamics simulation indicated a monolayer chemical sorption of pollutants by BC-SHMMT, in alignment with the sorption theoretical model. In the co-sorption system, the coexistence of pollutants increased the adsorption of Cd 2+ and decreased the sorption of PAEs. The smaller molecular size and higher diffusion coefficient of Cd 2+ facilitated its pore filling and interaction with oxygen-containing functional groups of the material, leading to competition with PAEs for sorption sites. Notably, the ion exchange and complexation of Cd 2+ adsorption by MMT-SH are pivotal in enhancing BC-SHMMT co-sorption capacity. These findings provide valuable insights into the development of eco-friendly novel materials and the improvement of co-pollution remediation efficiency.
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PubMed
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Molecular Catalysis
·
2025
·
IF 4.9
Rui Zhu,Fang Gao,Xinglong Li
The development of efficient catalysts for the stepwise oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformyl furan (DFF), 5-hydroxymethyl-2-furancarboxylic acid (HMFCA), 5-Formyl-2-furancarboxylic acid (FFCA) or 2,5-furandicarboxylic acid (FDCA) is critical for biomass valorization. Herein, we reported a bimetallic Co-Mn catalyst anchored on nitrogen-doped porous carbon, which was used for the oxidation of HMF to FDCA, avoiding the use of high temperature and high-pressure oxygen. High FDCA selectivity (>95 %) was achieved through reaction condition optimization. And HMF→DFF→FFCA→FDCA was considered to be the main reaction pathway during the whole oxidation process. Additionally, the chemical environment of the constituent elements of the used catalyst was analyzed by XPS. TEM revealed that the catalyst retained its porous structure and excellent metal dispersion after the reaction. This structural stability was corroborated by sustained >90 % FDCA selectivity over five consecutive reaction cycles. This work established a dual-metal synergy strategy for multi-step oxidation pathways, offering insights into the design of robust catalysts for biomass-derived platform molecule upgrading.
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Applied Materials Today
·
2025
·
IF 6.9
Yisheng Hu,Ya Wang,Yuqing Cai,Xiaodong Xu,Liping Zhao,Jing Zhang
Melanoma is a leading cause of cancer-related deaths. Surgical excision, the standard treatment, often results in incomplete removal and recurrence. A double-layered microneedle patch was developed for chemo-photothermal treatment of melanoma. The patch, based on zwitterionic poly(sulfobetaine methacrylate) (SBMA), includes a slow-degrading hair particles/curcumin (HMP/Cur) layer and a fast-dissolving ZIF-8/doxorubicin/ Panax notoginseng polysaccharide (ZIF-8@DOX/PNPS) layer, with an asiaticoside/ HMP (AS-HMP) substrate. Prepared via a three-step casting process, the microneedles exhibit excellent photothermal properties and tumor synergism under near-infrared (NIR) light. Upon skin insertion, the fast-dissolving layer releases ZIF-8@DOX within 5 min, which then releases DOX in the tumor's acidic environment. The HMP/Cur layer heats to 56.52 °C within 60 s under NIR, aiding in tumor elimination. In addition, the AS-HMP layer covers the wound and promotes tissue regeneration and collagen deposition, enhancing skin regeneration. The double-layered microneedles platform can simultaneously eliminate the tumor and accelerate wounding healing, making it a promising for clinical melanoma therapy.
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JOURNAL OF CONTROLLED RELEASE
·
2025
·
IF 11.5
Haoyang Yuan,Peifu Xiao,Fan Wang,Chen Guo,Shu Pan,Mai Jiang,Shicheng Hou,Yunong Sun,Yibo Wang,Yu Zhang,Tian Yin,Haibing He,Jingxin Gou,Xing Tang
Epithelial cell entrance and trans-epithelial transport are two essential processes that directly affect the efficacy of oral delivery of nanocarriers. Herein, a hydroxyethyl starch-based nanocapsule dual decorated with butyrate and octadecylamine (ODA) was first constructed to enhance transporter-mediated endocytosis and trans-epithelial transport, while reducing exenatide (EXT) loss during absorption. The epithelial barrier was then treated with linoleic acid (LA), which functioned as a cell membrane fluidity regulator. This treatment further improved oral delivery efficiency by lowering the energy cost of endocytosis through fluidizing of the cell membrane and increasing monocarboxylate transporter 1 (MCT1) expression on cell surfaces. The findings revealed that LA upregulated MCT1 expression by 3.26-fold, increased the cellular uptake of nanocapsules co-modified with butyrate and ODA by 4.52-fold, decreased ATP consumption for uptake in LA-pretreated Caco-2 cells to only 18.64 % of that in untreated Caco-2 cells, and increased their transcellular transport by 1.72-fold in a Caco-2/HT29-MTX-E12 co-culture monolayer. Therefore, the oral administration of EXT-loaded Bu-PEG-ODA NCs with LA significantly enhanced the oral bioavailability of EXT (Bu-PEG-ODA NCs group: 10.10 %, Bu-PEG-ODA NCs + LA group: 14.84 %), leading to a significant hypoglycemic effect with a 16.06 % relative pharmacological availability. This dosing strategy exhibited efficacious blood glucose control and pancreatic function recovery capabilities in the type 2 diabetes rat model. This study presents a unique co-optimization strategy based on two key processes in the oral absorption of nanocarriers, yielding significant advancements in the oral bioavailability of nanomedicines and improving their therapeutic efficacy.
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COMPOSITES COMMUNICATIONS
·
2020
·
IF 4.915
Dan Xue,Wen Wang,Longhai Piao,Mufang Li,Shuang Wang,Chenxue Xiang,Dong Wang
With the rapid development of electronic information technology, flexible transparent materials have been widely concerned and studied by researchers. Traditional transparent films have some problems in flexibility, transparency, or preparation method, which restrict their further development in scale production and application. Herein, we have developed a simple method by embedding the mass produced PVA- co -PE nanofibers into the PVP polymer matrix through photopolymerization method to produce a Polyvinyl Pyrrolidone/PVA- co -PE (PVP/NFs) composite film with high flexibility and transparency. Due to the nanoscale size and small refractive index contrast between nanofiber and PVP, the PVP/NFs composite film showed high light transmittance of 85.87%. In addition, the filling of PVA- co -PE nanofibers had a synergistic enhancement effect on the mechanical properties and thermal stability of PVP/NFs composite film. The tensile stress was as high as 16.6 MPa with a nanofiber content of 37.67 wt%, which was 4.05 times higher than that of the pure PVA- co -PE nanofiber film, and 2.81 times higher than that of the pure PVP film. Furthermore, the excellent flexibility of the PVP/NFs composite film enabled it to withstand a large-scale bending deformation under the action of external forces. The high flexibility, optical transparency and fast preparation made the PVP/NFs composite film a great application prospect in the intelligent electronic equipment and smart buildings.
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NANOTECHNOLOGY
·
2020
·Vol. 32
·期 2
·024001
·
IF 3.551
Yuantao Pei,Haijun Zhang,Lei Han,Liang Huang,Longhao Dong,Quanli Jia,Shaowei Zhang
Development an alternative approach to efficiently and economically produce hydrogen from water to replace non-renewable fossil fuels is one of the great challenges in the energy field. In this paper, a Co foam (CF) with 90% porosity and pore size of a few tens of micrometers was prepared, on which FeCoP nanoflowers were in-situ formed. Such a combination was used as a new electrocatalyst/self-supporting electrode for high efficiency hydrogen evolution reaction. Thanks to the larger surface area (and thus many more active sites), and quicker mass transfer through the porous structure, the CF supported FeCoP electrode exhibited much better hydrogen evolution reaction (HER) performance than the commercial Ni foam supported counterpart prepared under identical conditions. In the case of the former, only −44 mV overpotential was required to achieve a geometric current density of −10 mA cm−2, and the electrode showed a high stability at a current density < −500 mA cm−2. The electrode developed in this work could be potentially used as a novel electrode for future large-scale production of hydrogen. In addition, the novel strategy reported here could be similarly used to develop many other types of self-supporting electrodes with further improved HER performance.
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CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Xinwen Liu,Bingchu Mei,Weiwei Li,Yu Yang,Guoqiang Yi,Zhiwei Zhou,Zuodong Liu
2 at.% Yb:Sr 5 (PO 4 ) 3 F nanoparticles were synthesized by co-precipitation method. By using XRD , FT-IR and FE-SEM measurements, the influence of reactive conditions, including pH value, reactive temperature and mixing mode on the phase composition and microstructure of these nanoparticles were investigated. The results showed that pure Yb:Sr 5 (PO 4 ) 3 F nanopowders were produced by adding sodium hydroxide solution into S-FAP emulsion under alkaline environment or neutral environment. Agglomeration degree of the nanoparticles decreases and then increases with the increase of pH value and the aggregation was lowest when the pH value was 12. Spherical or nearly spherical nanoparticles with mean size of 24.0 nm were obtained in the environment of 20 °C and pH = 12. TEM results showed that the powders produced by fast mixing model (fast stirring and fast mixing) have more homogenous microstructure. The Yb:Sr 5 (PO 4 ) 3 F ceramic with a transmittance of 45% at 1500 nm was fabricated by hot-pressing the synthesized nanopowders. SEM results showed that residual pores and unsintered second phase are the main scattering sources of the as-prepared Yb:S-FAP ceramics.
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MATERIALS CHEMISTRY AND PHYSICS
·
2019
·
IF 2.781
Mengjue Cao,Yi Feng,Qian Chen,Pengcheng Zhang,Shihang Guo,Jianfeng Yao
In this study, melamine sponge (MS) is modified by in-situ growth of leaf-like Co-ZIF-L without the addition of additives or surfactants . Such modified MS shows good underwater superoleophobicity because of the unique pore structure and highly rough surface of MS@Co-ZIF-L. Compared to the pristine MS, the water-wetted MS@Co-ZIF-L exhibits excellent water-oil separation for various oils (the separation efficiencies are higher than 99.2%) with good long-term stability (no decrease in flux and separation efficiency after 60 cycles of separation). Moreover, MS@Co-ZIF-L is highly effective to treat oil-water emulsions. Besides the excellent separation performance, due to the outstanding mechanical properties, MS@Co-ZIF-L can be shaped into various configurations such as membranes, filters, adsorbing foams or other forms for the oil/water separation in various situations.
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ChemistrySelect
·
2023
·Vol. 8
·期 48
·e202301171
·
IF 2.1
Xinyu Wang,Lu Zhang,Guojun Yuan,Jianliang Bai,Yaqing Zhu,Lili Ren
Graphical The mechanism diagram demonstrates that the hydrodechlorination (HDC) reaction of carbon, oxygen co-doped MoP catalyst for trichloroethylene (TCE) shown as the above. Trichloroethylene (TCE) plays an important role in industrial production. However, humans are now suffering the effects of trichloroethylene being released directly into the environment. Therefore, it is urgent to explore effective methods for the degradation of trichloroethylene. Hydrodechlorination (HDC) reaction is considered a green, beneficial and promising technology due to its high selectivity, environmental tenderness and product recovery. Noble metal catalysts are considered as the benchmark catalysts for catalytic processes, but their wide application is limited by their low abundance and low stability. Phosphide has been paid more and more attention in HDC field because of its excellent catalytic performance. In view of the important role of O in the catalytic process, the preparation of C, O co-doped MoP was realized through the co-modification of EDTA and glucose. In the case of changing the molar ratio of MoP to the surface modifier, MOP−C−O (50 %) can achieve the best catalytic efficiency. Even compared with some reported catalysts, it has a very large catalytic advantage. In summary, the C, O co-doped MoP catalyst proposed in this paper provides guidance for the preparation of the same type of catalyst. The harms caused by organic chlorides to the human body and the environment make the problem of how to degrade organic chlorides particularly urgent. Phosphides have gradually attracted attention in HDC due to their high catalytic performance. In view of the important role of O in catalytic process, the preparation of C, O co-doped MoP was achieved by the synergistic modification of EDTA and glucose. Compared with unmodified MoP, the doping of carbon and oxygen in MoP−C−O ensure that more active sites are exposed on the surface. At the same time, the high dispersion of MoP on the carbon matrix increases the specific surface area of MoP−C−O, which is more conducive to the adsorption of reactants on the surface, thereby effectively improving the catalytic activity of the modified MoP−C−O. In the case of changing the molar ratio of MoP and surface modifier, the best activity of MoP−C−O (50 %) reaches 57.80 %, which is 2.3 times higher than that of MoP catalyst.
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Molecular Catalysis
·
2023
·
IF 4.6
Wujian Zhang,Weijian Ge,Yiping Jin,Mingming Dang,Panpan Zhang,Wenfeng Han,Ying Li,Zongjian Liu,Haodong Tang
Loaded noble metal redispersion is an important way to solve catalyst sintering. However, how to redisperse at low temperatures or carbon-based noble catalysts is a difficult problem. In this paper, we report this phenomenon occurring on PdCu alloy catalysts, where small-sized PdCu alloys can be realized from sintered large-sized PdCu alloys on carbon supports in a CO/O 2 atmosphere. The mechanism of redispersion is elucidated by XPS, TEM and DFT calculations. The main reason for the redispersion is the formation of the PdCuOx intermediate, which can easily migrate to the nearby catalyst surface and then be reduced to smaller PdCu alloy nanoparticles. This work provides a deeper understanding of the redispersion phenomenon and provides certain applications in industry.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Jianhua Yu,Xiancai Pang,Qunchao Yin,Di Chen,Hongzhou Dong,Qian Zhang,Jing Sui,Lina Sui,Lifeng Dong
Constructing self-supporting porous electrode material with abundant electrochemical active sites can effectively improve the energy storage capacity of supercapacitors . Herein, a novel electrode material (NCS@Co-ZIF/NF) is developed by depositing zeolitic imidazolate frameworks (Co-ZIF) on nickel foams (NF), which is adopted as a precursor (Co-ZIF/NF) to electrodeposit nickel-cobalt sulfides (NCS). The nanosheet arrays with cross-porous structures provide NCS@Co-ZIF/NF with excellent electrochemical characteristics, including a high specific capacity of 144.4 mAh g −1 at the current density of 1 mA cm −2 , 60.5% capacity retention at 50 mA cm −2 , and superb long-term cycle stability. Furthermore, NCS@Co-ZIF/NF//AC hybrid supercapacitor is fabricated by using NCS@Co-ZIF/NF as positive electrodes and activated carbon (AC) as negative electrodes , which exhibits a high energy density of 33.9 Wh kg −1 at a power density of 145 W kg −1 .
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