APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2024
·Vol. 130
·期 9
·612
·
IF 2.5
Li Fan,Chen Wei,Yang Han,Hu Rong,Huang Zongyu,Qi Xiang
Black phosphorus is a highly interesting two-dimensional material with a tunable band gap, ultra-high carrier mobility, and excellent optoelectronic properties. Its van der Waals spacing creates conditions for the entry of foreign substances, and various properties of BP can be effectively regulated by intercalation. In this paper, organic ammonium salts (CTAB, hexadecyl trimethyl ammonium bromide and TBAB, Tetrabutyl ammonium bromide) were chosen as the intercalated guests and BP bulk crystals were used as the intercalation hosts, and the effects of intercalation on the Raman as well as photoluminescence (PL) properties of BP were mainly investigated. The results show that the intercalation of organic ions leads to an overall redshift of the Raman modes corresponding to the three phonon vibrational modes of A g 1 , B 2g and A g 2 . In particular, the PL emission spectrum of the intercalated BP bulk exhibits a continuous spectrum bridging the peaks of the bilayer (1.35 eV), monolayer (1.7 eV) and the defect states. The prepared intercalation products also possess good stability under atmospheric conditions. Our study provides an idea for modulating the electronic and optical properties of bulk 2D materials, which has potential applications in the field of optoelectronics of crystalline materials.
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高影响因子
OXIDATION OF METALS
·
2020
·Vol. 94
·期 5
·397-408
·
IF 1.455
Zhang L.,Fan W.,Wang Y.,Liu K.,Wang Z. Z.,Bai Y.
This study aims to enhance the oxidation resistance of ceramic coatings through designing and optimizing microstructure. A series of double-layered lanthanum–cerium oxide (LC) and 8 wt% yttria-partially-stabilized zirconia (YSZ) coatings with different thickness ratios were tailored. The isothermal oxidation experiment and molecular dynamics simulation results suggested that due to the lower oxygen ionic diffusion coefficient, double-layered LC/YSZ coatings exhibited an excellent antioxidation property compared to the single-layer YSZ coating. However, with the increase of LC layer thickness in LC/YSZ coatings, sintering-induced vertical cracks were easily formed within LC layer, which significantly shortened the oxidation resistance of LC/YSZ coatings by a burner rig test at 1225 °C. The equivalent thermal growth oxide thickness manifested that the optimum thickness ratio between LC and YSZ layers was 1:2.
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高影响因子
Materials for Renewable and Sustainable Energy
·
2019
·Vol. 8
·期 3
·15
·
IF 0
Xu Xi,Wang Chao,Fronzi Marco,Liu Xuehua,Bi Lei,Zhao X. S.
Co 3 O 4 nanocubes with exposed (001) planes were prepared and employed for use as first-generation Sr-doped LaMnO 3 (LSM) cathodes in solid oxide fuel cells to improve the cell performance. Theoretical simulations suggest that the Co 3 O 4 (001) plane has the smallest oxygen adsorption and oxygen dissociation energies compared with other planes, thus favouring cathode reactions in solid oxide fuel cells (SOFCs). Experimental studies consistently demonstrate that a cell using an LSM cathode made with Co 3 O 4 nanocubes with selective (001) surfaces exhibits a peak power density of 500 mW cm −2 at 600 °C, while the power output for a cell using unselective (commercial) Co 3 O 4 nanoparticles is only 179 mW cm −2 at the same temperature. The electrochemical study indicates that the use of Co 3 O 4 nanoparticles with exposed (001) surfaces obviously accelerates the cathode reactions and thus decreases the polarisation resistance, which is the key to improving fuel cell performance. This study demonstrates the feasibility of using the crystal planes of metal oxides to improve the fuel cell performance and provides a new way to design SOFC cathodes.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 4
·9416-9427
·
IF 5.19
Zhu Dandan,Shi Linan,Li Haoming,Zhang Jinyi,Zhang Jiupeng,Wei Cundi
In this study, TiO 2 /MSGM composite material with adsorption-photocatalytic properties was prepared by extracting mesoporous silica glass microsphere (MSGM) from coal gasification fine slag (CGFS) as a novel TiO 2 carrier. The results of characterization and properties of the composite showed that MSGM could improve the adsorption capacity and photocatalytic activity of the composite by improving the pore structure of the composite, hindering the growth of TiO 2 particles, increasing the phase transition temperature of TiO 2 , enhancing the dispersion of TiO 2 particles. The sample 1:3-TiO 2 /MSGM-2–500 prepared under the optimized conditions possesses satisfactory morphology characteristics, high adsorption capacity, and photocatalytic activity to rhodamine B (RhB). The synergistic effects of adsorption and photocatalytic significantly increase the total removal rate of RhB. This study not only provides a new direction for high-value-added resource utilization of CGFS but also gives a new kind of low-cost carrier material with adsorption property for TiO 2 loading to remove organic dye pollutants.
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高影响因子
JOURNAL OF FOOD SCIENCE AND TECHNOLOGY-MYSORE
·
2014
·Vol. 52
·期 5
·3072-3078
·
IF 2.024
Song Lianjun,Zhi Junli,Zhang Pingan,Zhao Qiuyan,Li Ning,Qiao Mingwu,Liu Jie
In this study, a new method was developed to produce biodegradable material using soy protein isolate (SPI) as matrix. The blend films were successfully prepared by casting the aqueous dispersions of SPI and polyamic acid salt (PAS) solution. The effects of blending and PAS content on the structure of the resultant films were investigated by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), differential scanning calorimetry (DSC) analyses, scanning electron microscopy (SEM). Furthermore, film thickness, water vapor permeability (WVP), water barrier and mechanical properties were measured. The result showed that there exists strong intermolecular interactions between SPI and PAS, which played an important role in forming a homogeneous structure of the blend films. Moreover, the incorporation of PAS enhanced the water barrier and mechanical properties of the films. This is a simple way to prepare biodegradable films compared with other methods and the blend films have the potentiality to be used as food packaging and biomedical materials instead of synthetic polymer.
研究领域:
生物材料学
·
高分子科学
·
食品科学
·
包装工程
·
生物医学工程
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高影响因子
MULTIMEDIA TOOLS AND APPLICATIONS
·
2021
·Vol. 80
·期 8
·11471-11489
·
IF 2.757
Wang Zhiyang
According to the problem of spliced money in ATM (Automatic Teller Machine), the paper puts forward a template matching algorithm for recognition of left and right numbers based on one-dimensional gray scale projection. First it uses the Canny boundary detection algorithm to separate the banknote boundary from the R component image, and then preprocesses the image to make the subsequent processing easier; secondly applies the predefined location to divide the area of left and right numbers; thirdly calculates the one-dimensional gray scale projection curves of left and right numbers, based on which every character or number is divided; finally carries out the operation of template matching to obtain correlation coefficients of every character or number, comparing which with threshold it judges whether the left and right numbers are matched. For the transparent tape attached to the spliced money, a method based on the difference in object reflectivity to recognize the tape is designed. First it highlights the characteristics of the tape by preprocessing and binary morphological analysis of the B component image. Finally, it judges whether there is transparent tape on the surface of the banknote according to the set threshold value. Experimental results show that both number matching and tape detection can be completed, and algorithm can correctly recognize spliced money. The correct recognition rate of the algorithm reaches 100%, and the false positive rate、false negative rate are both 0. The processing is fast and simple, which meets the requirements of ATM.
研究领域:
计算机视觉
·
图像处理
·
纸币鉴伪
·
模式识别
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高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2015
·Vol. 30
·期 1
·10-15
·
IF 0.399
Li Jingyin,Li Na,Li Changjia,Guo Yufeng
Sulfur/graphene composites with different sulfur contents were prepared by two-step synthesis, where graphene was regarded as a carrier of sulfur active substance. The surface structure and crystal form of the composites obtained were characterized and compared by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). It was found that sulfur was partially coated by graphene. The graphene folds provided more nano-pores and electron transport channels for sulfur. From TGA results, the sulfur contents of the sulfur/graphene composites measured were about 42.32 wt%, 54.94 wt%, and 65.23 wt%. Electrochemical tests demonstrated that sulfur/graphene composite ( x =54.94 wt%) cathode exhibited better capacity retention (40.13%) compared with the pure cathode (20.46%), where an initial discharge capacity was up to 1 500 mAh·g −1 and it remained about 600 mAh·g −1 after 30 cycles. Furthermore, the electrochemical reaction mechanism and the state of reaction interface for Li/S battery were analyzed by cyclic voltammogram and AC-impedance spectra. The results indicated that the sulfur/graphene composite with a sulfur content of 54.94 wt%, based on a two-step synthesis, contributed to improving electrochemical properties of lithium/sulfur battery
研究领域:
材料科学
·
储能技术
·
电化学
·
纳米材料
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高影响因子
IONICS
·
2023
·Vol. 29
·期 9
·3517-3523
·
IF 2.8
Zou Jingmin,He Cuihong,Bao Jingze,Sun Chuan-Fu,Li Yafeng
Hard carbon (HC), composed of disorder graphite domain construction, provides defects, gaps, and nanopores that are beneficial for storing K-ion. In this work, hard carbon derived from spent black tea (THC) is synthesized through a two-step carbonization process. THC is an easy preparation, green, and high-abundance carbon material for highly stable potassium-ion storage. As an anode for potassium-ion batteries, it delivers a high capacity of 203 mA h g −1 at 30 mA g −1 and long-term cycling life with 90% capacity retention over 3.6 months. This superior cycle life is attributed to the highly reversible structure, rapid ion diffusion rate, and charge transfer rate of THC. Not only that, a full cell was assembled with THC as the anode and perylene 3,4,9,10-tetracarboxylic dianhydride (PTCDA) as the cathode. The PTCDA//THC delivers a high capacity of 48.6 mA h g −1 and an energy density of 107 W h kg −1 at 100 mA g −1 . These findings suggest that THC has considerable promise as a low-cost, high-stability anode material for potassium-ion batteries.
研究领域:
材料科学
·
储能
·
电化学
·
可持续材料
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高影响因子
JOURNAL OF POLYMER RESEARCH
·
2014
·Vol. 21
·期 8
·551
·
IF 1.897
Ma Li,Xu Jingmei,Han Shu,Yang Min,Wang Zhe,Ni Hongzhe,Gui Yu
A series of copolymers, sulfonated poly (aryl ether ketone sulfones) containing triazoles (SPAEKST), were synthesized by direct polycondensation reactions. The content of sulfonic acid and triazole groups was controlled by adjusting the molar ratio of feeding. The structures of triazole monomer and SPAEKST copolymers were confirmed by their 1 H NMR and FTIR spectral analyses. The performance of membranes such as thermal and oxidative stabilities was clearly improved with increasing content of triazole groups. The morphology of SPAEKST membranes was investigated by TEM analyses, and the results indicate that the sulfonic acid groups were dispersed evenly. No clear phase separation was observed. The contact angle tests showed that the presence of triazoles clearly improved the hydrophilicity of membranes. The water desorption curves showed that the water retention of membranes increased with increasing content of triazole groups. The proton conduction of membranes exhibited a low dependence on relative humidity. At 80 °C, the proton conductivity of SPAEKST-30 % reached to 1.1 mScm −1 under 20 % RH.
研究领域:
材料科学
·
高分子化学
·
能源材料
·
燃料电池
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高影响因子
NATURAL HAZARDS
·
2021
·Vol. 110
·期 2
·1199-1226
·
IF 3.102
Chaoxu Xia,Gaozhong Nie,Xiwei Fan,Huayue Li,Junxue Zhou,Xun Zeng
The timely and accurate assessment of casualties is the key for and basis of emergency rescue work after an earthquake. In this paper, through exponential fitting of historical seismic data, an evaluation model of death based on the building destruction ratio is proposed. Through the analysis of historical seismic data, we propose the concept of an anti-lethal level and construct the corresponding coefficient. We use factors such as earthquake magnitude, intensity, and occurrence time, the population density, and the anti-lethal level in the region as correction factors for the predicted number of casualties and build a model for evaluating the number of casualties based on coefficient correction. The evaluation results are relatively accurate; the R 2 index of the proposed model is 0.8768, whereas the R 2 of the two comparison models selected in this paper is 0.619 and 0.4603, respectively. The accuracy of the proposed model results is much higher than that of the other models, which illustrates the effectiveness of the model presented in this paper. It also indicates that the model proposed in this paper can provide a scientific basis and data support for earthquake emergency rescue work.
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高影响因子
BMC Veterinary Research
·
2026
·
IF 2.6
Qihang Liang,Qi Wang,Pinqi Chi,Depeng Fan,Beiping Tan,Shiwei Xie,Junming Deng,Hongyu Liu,Ling Zeng
Antimicrobial peptide BmKn2-7, a rationally optimized derivative of the scorpion venom peptide BmKn2, shows strong potential as an antibiotic alternative for controlling Vibrio parahaemolyticus in aquaculture. This study evaluated its antibacterial mechanisms and in vivo efficacy in Litopenaeus vannamei through biochemical assays, transcriptomic profiling, and challenge experiments. BmKn2-7 exhibited potent in-vitro activity (MIC = 125 µg/mL) and disrupted bacterial homeostasis by increasing membrane permeability, inducing oxidative stress, and inhibiting P-type ATPase. RNA-seq analysis revealed extensive transcriptional reprogramming, including the downregulation of quorum-sensing, virulence, and β-lactam resistance–associated genes. In vivo, BmKn2-7 significantly improved shrimp survival following V. parahaemolyticus infection and selectively reduced Vibrio abundance in the gut without compromising overall microbiota diversity. Together, these findings demonstrate that BmKn2-7 acts through complementary bactericidal and anti-virulence pathways while promoting intestinal microbial resilience, supporting its potential as a promising antimicrobial candidate for reducing vibriosis risk in shrimp aquaculture.
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产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2026
·
IF 15.7
Shi Yingli,Liu Ying,Dong Hongchun,Fu Gaocheng,Zhou Hang,Wang Haifeng,Wang Xue-Lu,Yao Ye-Feng
The proton-coupled electron transfer (PCET) kinetics plays a critical role in governing the CO 2 -to-formate conversion efficiency during CO 2 eletroreduction reaction. While alkali metal cations are known to influence the reaction pathway, elucidating how trace doping modifies the catalytic sites remains a key challenge. Here we show that incorporating Li into bismuth oxycarbonate (BOC-Li) induces structural modifications that optimize the PCET process at bismuth-active sites, thereby boosting CO 2 -to-formate conversion. By employing dual-isotope ( 2 H/ 13 C) operando nuclear magnetic resonance (NMR) to track the formation of 1 H 13 COO − / 2 H 13 COO − , combined with kinetic isotope effect, Tafel analysis and in situ attenuated total reflection surface-enhanced infrared absorption spectroscopy, we observe a more efficient proton-electron transfer pathway. Density functional theory (DFT) calculations suggest that Li doping is associated with enhanced activity of Bi sites, potentially strengthening H 2 O/CO 2 adsorption and reducing the O–H activation energy. Collectively, this work highlights alkali doping as a promising strategy for structurally engineering catalytic sites to improve PCET kinetics.
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DOI
PubMed
高影响因子
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