JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 22
·9181-9195
·
IF 4.5
Yu Jiaqi,Li Yuqi,Qin Feng,Lu Shaorong,Yang Chao,Li Yang,Zhou Wei
In this work, 1-aminoethyl-3-methylimidazolium bromide ionic liquid was used to modify the surface of graphene nanosheets (GNs) through “π–π” interaction to achieve good dispersion and conductivity. By introducing ionic liquid-modified graphene nanosheets (IGNs) into the PI matrix, the ultra-lightweight and multifunctional IGNs/PI aerogels were prepared via freeze-drying and thermal imidization. Benefiting from the porous structure and the introduction of conductive IGNs, the IGNs/PI aerogels exhibit excellent electromagnetic wave (EMW) absorption properties, compression properties, thermal insulation properties and thermal stability. Notably, when the volume content of IGNs is 10%, the IGNs/PI-10 aerogels show the best EMW absorption performance with a minimum reflection loss (RL min ) of −24.8 dB at 2.44 mm and an effective absorption bandwidth (EAB) of 3.6 GHz at 3.00 mm. These promising characteristics including excellent EMW absorption, compression properties and thermal insulation endow IGNs/PI aerogels great application prospects as multifunctional EMW absorbers.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 22
·9382-9393
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IF 4.5
Wang Bingying,Zhang Keke,Gao Yijie,Liu Peng,Liu Bo,Zhang Zhansheng
The trend toward miniaturized and highly integrated chip packaging has created a pressing need for lead-free solders with high strength, toughness, and conductivity. In this paper, we designed a scheme of Al 2 O 3 -modified nanomaterial-reinforced low silver Sn1.0Ag0.5Cu (SAC105) solder matrix. To begin with, a novel amorphous carbon and nickel core–shell structure plating modified on Al 2 O 3 (C/Ni/Al 2 O 3 ) were prepared by the electroless plating method. Then, the nano-C/Ni/Al 2 O 3 particle as reinforcement phase was mixed into the matrix solder alloy by ultrasonic vibration stirring. Finally, the morphology and relationship between coated carbon, deposited nickel and original solder interface were analyzed. The microstructure and main properties of the modified solders were also investigated. The experimental results suggested that amorphous carbon and nickel film were prepared on the surface of Al 2 O 3 by electroless plating method. The outer layer of nano-Al 2 O 3 was coated with non-uniform thickness of nickel and carbon coatings. The mass percentage of amorphous carbon was about 3.50%. Adding C/Ni/Al 2 O 3 (0–0.5%) into the SAC105 solder matrix resulted in a gradual increase in conductivity and wettability. The strength and toughness of the modified solder alloy improved as well with the adjunction of reinforced phase. The tensile fracture surface exhibited from a mixture of ductile and brittle, characterized by dimples and cleavage surface, to a purely ductile mode consisting mainly of dimples.
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Carbon Letters
·
2023
·Vol. 33
·期 7
·1935-1945
·
IF 4.5
Wang Qian,Wang Miao,Zheng Lufei,She Yongxin,Wang Jing,Jia Minghong,Abd El-Aty A. M.
The widespread and extensive use of glyphosate in agriculture has raised concerns about its potential impact on the quality and safety of agricultural products. Conventional detection methods require long analysis times, making them impractical for the rapid detection of large quantities of samples. Therefore, developing a fast and simple detection system for glyphosate pesticide residues is urgent. In this study, the development of a facile fluorescence probe synthesized using a simple one-pot hydrothermal method for the determination of glyphosate is an important step toward addressing the need for a fast and simple detection system. The present sensor was created using bovine serum albumin (BSA) as a precursor, and the sensor operates by producing an “off–on” fluorescent signal. The bovine albumin-derived BSA-CDs emitted light yellow fluorescence, but this fluorescence was quenched (or suppressed) by the presence of Cu 2+ ions. However, the fluorescence can be restored by the presence of glyphosate, which interacts with the Cu 2+ ions to form a complex and release the BSA-CDs from suppression. The functional groups in glyphosate can capture Cu 2+ and break the BSA-CDs/Cu 2+ combinatorial system. The BSA-CDs/Cu 2+ fluorescence quenching system had good selectivity for glyphosate. The detection limit of the BSA-CD/Cu 2+ fluorescence sensor was 0.05 µg/mL. This developed method was utilized to successfully detect glyphosate in Chinese wheat. The average recoveries ranged from 98.9 to 100.7%, with a relative standard deviation < 3.0%, showing good prospects for practical applicability.
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METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2023
·Vol. 54
·期 4
·1675-1686
·
IF 3
Fu Yingzheng,Zhang Zhimin,Lu Xuchen,Yan Yan,Pan Binfeng
To increase the reaction driving force and prepare Mg–Nd master alloys, the synergistic interaction between NdCl 3 and NdF 3 was used in the magnesiothermic reduction process in NdCl 3 –NdF 3 -containing molten salt. Thermomechanical analysis was used to investigate the possibility of the synergistic interaction in molten salt. Then the verification of synergistic interaction was conducted by analyzing the composition of the molten salt and the alloys obtained in the magnesiothermic reduction process. After that, the factors affecting synergistic interaction were investigated. At last, the mechanism of the synergistic interaction between NdCl 3 and NdF 3 in molten salt was proposed and discussed. The coupling reaction formed in the magnesiothermic reduction process and the existence of three reaction mechanisms increased the reaction driving force. Mg–RE master alloys with the content of Nd being 25 to 30 wt pct were prepared under the optimum conditions and the conversion rate of NdF 3 was greater than 70.94 pct. The content of Nd and the content of various impurities in the alloys obtained both met the requirements of the commercial Mg–Nd master alloys.
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Biomaterials Research
·
2023
·Vol. 27
·期 1
·1-20
·
IF 11.3
Fu Shiyao,Wang Mingao,Li Bin,Li Xu,Cheng Jianjun,Zhao Haitian,Zhang Hua,Dong Aijun,Lu Weihong,Yang Xin
Background Multi-component nano-delivery systems based on chemotherapy (chemo)- photodynamic therapy (PDT)- chemodynamic therapy (CDT) have gained increased attention as a promising strategy to improve clinical outcomes in cancer treatment. However, there remains a challenge in developing biodegradable, biocompatible, less toxic, yet highly efficient multicomponent nanobased drug delivery systems (DDS). Here, our study presents the screening and development of a novel DDS based on co-assemblies natural small molecule (NSMs). These molecules (oleanolic acid, and betulinic acid) are combined with photosensitizers Chlorine6 (Ce6) and Cu 2+ that are encapsulated by tumor cell membranes. This nanocarrier encapsulated in tumor cell membranes achieved good tumor targeting and a significant improvement in tumor accumulation. Methods A reprecipitation method was used to prepare the co-assembled nanocarrier, followed by the introduction of Cu 2 + into the DDS (OABACe6 NPs). Then, by wrapping the surface of NPs with the cell membranes of 4T1 which is a kind of mouse breast cancer cells (CM@OABACe6/Cu NPs). and analysis of its structure and size distribution with UV–Vis, XPS, FT-IR, SEM, TEM, and DLS. The synergistic effects of in vitro chemotherapy, CDT and PDT and targeting were also validated by cellular and animal studies. Results It was shown that CM@OABACe6/Cu NPs achieved good tumor targeting and a significant improvement in tumor accumulation. In the composite nano-assembly, the NSMs work together with the Ce6 to provide effective and safe chemo and PDT. Moreover, the effect of reduced PDT due to the depletion of reactive oxygen species (ROS) by excess glutathione (GSH) in the tumor can be counteracted when Cu 2 + is introduced. More importantly, it also confers CDT through a Fenton-like catalytic reaction with H 2 O overexpressed at the tumor site. Conclusions By constructing CM@OABACe6/Cu NPs with homologous targeting, we create a triple synergistic platform for cancer therapy using PDT, chemo, and CDT. We propose here a novel combinatorial strategy for designing more naturally co-assembled small molecules, especially for the development of multifunctional synergistic therapies that utilize NSMs.
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PubMed
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 10
·2727-2736
·
IF 2.5
Wu Bingxue,Zhang Jian,Yang Zhi,Lu Xuanlin,Zhao Xin,Liu Wen,Chen Jiaxuan,Zhao Yicheng,Li Yongdan
Ni-based cermets are the most widely used anode materials for solid oxide fuel cells. Reducing the content of Ni is beneficial to anode stability but usually unfavorable for the catalytic activity. In this study, Ni-Ce 0.8 Sm 0.2 O 2-δ anode with a low Ni content is synthesized through a polymer-directed evaporation-induced self-assembly strategy. Ni distributes evenly in the anode, resulting in an enlarged triple-phase boundary region and improved reactivity of lattice oxygen in the oxide phase. The anode containing 5 wt.% Ni possesses the highest amounts of oxygen vacancies and Ce 3+ /Ce 4+ redox pairs that facilitates the charge transfer process, which is one of the rate-determining steps of anode reaction. Consequently, that anode shows the lowest polarization resistance of 0.014 Ω cm 2 at 700 °C, much lower than those of other Ni-based anodes prepared through conventional techniques such as impregnation and solid-mixing. With that anode, a single cell supported by a 480-μm-thick Ce 0.8 Sm 0.2 O 2-δ electrolyte layer exhibits the maximum power density of 270 mW cm −2 at 700 °C. The anode also shows a promising stability.
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Journal of Analysis and Testing
·
2023
·Vol. 7
·期 2
·101-109
·
IF 4.7
Li Hang,Zhao Chao,Wei Shengnan,Liu Xingxing,Li Juan,Wang Juan
The abnormal changes of biothiols are directly related to health condition of human body, and the effective identification and quantification of biothiols is of great significance for screening and diagnosis of disease. This study described the development of a pH-regulated colorimetric sensor array for discrimination of five kinds of biothiols including cysteine (Cys), glutathione (GSH), homocysteine (Hcy), cysteamine (CA) and N-acetylcysteine (NAC). The proposed sensor array was established using 5-nm- and 20-nm-sized β -cyclodextrin-functionalized gold nanoparticles ( β -CD@AuNPs) as nonspecific receptor and signal transduction elements. Due to the different binding affinity between biothiols and β -CD@AuNPs in various pH environments, the different aggregation behaviors of nanoparticles produced unique colorimetric response patterns, which were able to be distinguished by bare eyes and UV–vis spectrophotometer. Accordingly, principal component analysis (PCA) and hierarchical cluster analysis (HCA) were employed for pattern recognition and generated a clustering map for a clear differentiation of biothiols at the level of μmol/L. Furthermore, it can be proved that the method was successfully applied to the analysis of biothiols in human urine samples.
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Advanced Fiber Materials
·
2023
·Vol. 5
·期 4
·1505-1518
·
IF 16.1
Yang Yue,Yang Yuchen,Huang Jianying,Li Shuhui,Meng Zheyi,Cai Weilong,Lai Yuekun
Abstract Air pollution caused by the rapid development of industry has always been a great issue to the environment and human being’s health. However, the efficient and persistent filtration to PM 0.3 remains a great challenge. Herein, a self-powered filter with micro–nano composite structure composed of polybutanediol succinate (PBS) nanofiber membrane and polyacrylonitrile (PAN) nanofiber/polystyrene (PS) microfiber hybrid mats was prepared by electrospinning. The balance between pressure drop and filtration efficiency was achieved through the combination of PAN and PS. In addition, an arched TENG structure was created using the PAN nanofiber/PS microfiber composite mat and PBS fiber membrane. Driven by respiration, the two fiber membranes with large difference in electronegativity achieved contact friction charging cycles. The open-circuit voltage of the triboelectric nanogenerator (TENG) can reach to about 8 V, and thus the high filtration efficiency for particles was achieved by the electrostatic capturing. After contact charging, the filtration efficiency of the fiber membrane for PM 0.3 can reach more than 98% in harsh environments with a PM 2.5 mass concentration of 23,000 µg/m 3 , and the pressure drop is about 50 Pa, which doesn’t affect people’s normal breathing. Meanwhile, the TENG can realize self-powered supply by continuously contacting and separating the fiber membrane driven by respiration, which can ensure the long-term stability of filtration efficiency. The filter mask can maintain a high filtration efficiency (99.4%) of PM 0.3 for 48 consecutive hours in daily environments. Graphical abstract
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高影响因子
MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 6
·1-12
·
IF 5.7
Zhang Shaobing,Yan Haidong,Li Hongni,Xu Tiantian,Li Hui,Wang Chengkun,Yang Zheng,Jia Xiaodan,Liu Xiangrong
Abstract Nitrogen-doped carbon dots (NCDs) have been constructed in which coal washing wastewater is used as carbon precursor, tryptophan is added for nitrogen doping and surface functional together with polyethylene glycol. The nitrogen doping and surface functional with electron rich groups resulted in excellent fluorescent properties regarding stability, reversibility, printability with high quantum yield which not only enable the NCDs as fluorescent ink for advanced message encryption, but also realize specific on-off-on fluorescent sensing of Hg 2+ and GSH as solution, hydrogel and filter paper sensors. The NCDs had a linear range of 0.01-100 μM and a detection limit of 6.27 nM (RSD 0.33%) for Hg 2+ and the NCDs@Hg 2+ had a linear range of 0.01–60 μM and a detection limit of 3.53 nM (RSD 1.53%) for GSH in sensing studies with aqueous solutions. In addition, with the low cytotoxicity and good biocompatibility NCDs have been successfully used for imaging Hg 2+ and GSH in living MG-63 cells. The presented NCDs recycle waste coal washing water into worthwhile material which can be implemented as promising anti-counterfeiting and message encryption candidates as well as effective Hg 2+ and GSH sensing, tracking and removing tools in complicated environmental and biological systems. Graphical Abstract
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高影响因子
Nano Research
·
2023
·
IF 9.9
Xu Shixin,Du Chen,Zhang Miaomiao,Wang Ruoying,Feng Wei,Wang Chengwei,Liu Qinsong,Zhao Wen
Endogenous electric fields (EFs) are capable of regulating the behaviors of skin cells in wound healing. However, majority of current dressings are primarily engaged in the passive repair of defective tissue, as they lack the ability to actively respond to physiological electrical signals. In this work, a series of nanofibrous membranes (NFMs) were fabricated by coaxial electrospinning, combining the good mechanical properties of poly(ε-caprolactone) (PCL), the bioactivity of gelatin and the electroactivity of Ti 3 C 2 T x MXene, as electroactive and antibacterial dressings for cutaneous wound healing. The obtained NFMs exhibited suitable mechanical properties and hydrophilicity, excellent electroactivity, antibacterial activity, and biocompatibility. Especially, Ti 3 C 2 T x MXene/PCL/gelatin-6 (MPG-6, 6 wt.% of Ti 3 C 2 T x MXene in sheath spinning liquids) showed the optimal conductivity and antibacterial activity. Excitingly, this scaffold significantly promoted the adhesion, proliferation, and migration of NIH 3T3 cells under the electrical stimulation (ES). The in vivo evaluation in a full-thickness wounds defect model demonstrated that the MPG-6 films significantly accelerated wound closure, increased granulation tissue formation, increased collagen deposition, and promoted wound vascularization. In summary, the versatile scaffold is expected to be an ideal candidate as wound dressings due to its ability to promote the transmission of physiological electrical signals and thus improved the therapeutic outcomes of wound regeneration.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-7
·
IF 16.6
Wang Zhi-Da,Liang Song,Yang Yuqing,Liu Zhen-Ning,Duan Xiao-Zheng,Li Xinpei,Liu Tianbo,Zang Hong-Ying
Inorganic salts usually demonstrate simple phasal behaviors in dilute aqueous solution mainly involving soluble (homogeneous) and insoluble (macrophase separation) scenarios. Herein, we report the discovery of complex phase behavior involving multiple phase transitions of clear solution – macrophase separation – gelation – solution – macrophase separation in the dilute aqueous solutions of a structurally well-defined molecular cluster [Mo 7 O 24 ] 6− macroanions with the continuous addition of Fe 3+ . No chemical reaction was involved. The transitions are closely related to the strong electrostatic interaction between [Mo 7 O 24 ] 6− and their Fe 3+ counterions, the counterion-mediated attraction and the consequent charge inversion, leading to the formation of linear/branched supramolecular structures, as confirmed by experimental results and molecular dynamics simulations. The rich phase behavior demonstrated by the inorganic cluster [Mo 7 O 24 ] 6− expands our understanding of nanoscale ions in solution.
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高影响因子
CELLULOSE
·
2023
·Vol. 30
·期 11
·7205-7220
·
IF 5.7
Wei Ning,Zhang Sufeng,Yao Xue,Zhou Qiusheng
In light of the resplendent prospect of water electrolysis, the development of cost-effective, robust and efficient hydrogen/oxygen evolution reactions (HER/OER) bifunctional electrocatalysts is a major challenging task. Herein, RuNi heterojunction alloy decorated cellulose filter (RuNi/CF) as bifunctional electrocatalysts for OER and HER to boost water splitting was successfully synthesized through a two-step of electroless plating and electrodeposition. Benefiting from the unique structure and well-designed electronic engineering of RuNi alloy decorated on cellulose filter, RuNi/CF exhibits outstanding performance for water splitting as a bifunctional electrocatalyst. Density functional theory (DFT) calculation proves that the introduction of Ru makes the electrons around Ni rearrange, which in turn changes the density of the electron cloud around Ni. In alkaline media, the as-prepared Ru 10 Ni/CF displays a very low overpotential of 370 mV to deliver 100 mA/cm 2 with the corresponding Tafel slope of 149 mV/dec for OER. Moreover, it required a small overpotential of 64 mV to carry out a current density of 10 mA/cm 2 for HER. As a result, the assembled water splitting electrolyzer with the Ru 10 Ni/CF shows a very low voltage of 1.56 V to reach 10 mA/cm 2 at alkaline conditions. The cellulose-based self-supporting electrode exhibits abundant HER and OER highly active sites and a robust 3D network structure, especially the electronic structure adjustment from the accumulation of bimetals, which together promote electron transport, resulting in excellent catalytic activity and durability in water splitting. The work may provide insights for the innovative strategy of noble metal electrocatalysts for water splitting.
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