Applied Materials Today
·
2020
·
IF 8.352
Yipeng Chen,Baokang Dang,Qingfeng Sun
The concept of replicating the laminated ternary structure of natural nacre with coordinating strength and toughness has generated much interest in exploring future structural materials. Here the ternary lignocellulosic nacre with high performance is fabricated via synergistic toughening of delignified nano-lignocellulose (DNLC) and molybdenum disulfide (MoS 2 ) through freezing-induced assembly followed by hot-pressing process. The high mechanical performance of the lignocellulosic nacre due to lubrication of MoS 2 combine with intermolecular hydrogen bonding between DNLC and chitosan (CS) has effectively verified the synergistic toughening effect. The MoS 2 -CS lignocellulosic nacre exhibits an exceptional balance of strength and toughness, which exceed to other conventional lignocellulosic composites and natural materials. Furthermore, these composites show superior photocatalytic activity. This approach of fabricating the MoS 2 -CS lignocellulosic nacre supplies an imaginative door in the near future for devising and manufacturing the ultra-strong and ultra-tough lignocellulosic nacre for the photooxidation of volatile organic.
研究领域:
材料科学
·
纳米复合材料
·
仿生工程
·
环境催化
·
绿色建筑材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Chao Wang,Zhishu Guan,Yanbin Shen,Shuhui Yu,Xian-Zhu Fu,Rong Sun,Ching-Ping Wong
Hybrid-structured nanoparticles have demonstrated superior chemical, physical or electrochemical properties over a single component owing to the synergistic effects from each component. Here we report on rambutan-like cobalt molybdate@nickel cobalt sulfides (CoMoO 4 @Co 1.5 Ni 1.5 S 4 ) hybrids for electrochemical energy storage which are synthesized on Ni foam by a facile hydrothermal method . CoMoO 4 microspheres are directly grown on the Ni foam as the core and Co 1.5 Ni 1.5 S 4 nanorods grown in sequence in shape of branches. This exceptional structure is beneficial for rapid electron transport and fast diffusion of ions owing to the existence of vast channels. Consequently, this hybrid electrode material exhibits an overall improved capacitive performance, including a high specific capacitance of 1405 F g −1 at the current density of 1 A g −1 and an excellent cyclic stability (92% retained after 1000 cycles at 10 A g −1 ). In addition, an all-solid-state asymmetric supercapacitor is fabricated which exhibits a high specific capacitance of 221.3 F g −1 collected at 1.5 A g −1 , and a high energy density of 127.86 W h kg −1 is gained at a power density of 2003.88 W kg −1 . After rapid charging (3 s), two such all-solid-state devices in series light a red light-emitting diode over 10 min. Thus, our work provides a remarkable candidate for energy storage and conversion devices.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米结构材料
·
功能材料
✓ 已验证
DOI
高影响因子
INDUSTRIAL LUBRICATION AND TRIBOLOGY
·
2023
·Vol. 75
·期 3
·282-291
·
IF 1.6
Qin Tan,Yali Zhang,Xinle Li,Jian Pu,Shu Yang,Zhongmin Jin
PurposeThis study aims to systematically investigate the tribological behaviors of metal and polyethylene using lubricants composed of four synovial fluid (SF) components. In addition, the changes in protein conformation during wear were analyzed to establish the correlation between protein conformation and tribological properties.Design/methodology/approachA pin-on-disk tester with multidirectional sliding motion was used for tribological properties observation between metal and polyethylene pairs. Simulated SFs with four main constituents were used as the testing lubricants. Differential scanning calorimetry and Raman were used to characterize the changes in protein conformation during wear.FindingsThe coupling of lipids and hyaluronic acid further suppressed protein denaturation. The protein structures of the adsorption film and the ensnared protein chains in the friction zone were maintained to a certain extent, thus improving the friction and wear of polyethylene.Originality/valueThese findings established the correlation between protein conformation and friction and wear, promoting the understanding of the lubrication mechanism of artificial joints.
研究领域:
生物医学工程
·
表面工程
·
材料科学
·
关节置换术
·
生物摩擦学
✓ 已验证
DOI
高影响因子
Advanced Electronic Materials
·
2021
·Vol. 7
·期 11
·2100548
·
IF 7.295
Yuying Yang,Alei Li,Mengmeng Wei,Youpin Gong,Wei Qin
The understanding of interlayer couplings should be paid much more attention owing to their importance in 2D materials with different layers. Here, through changing the number of layers, the tunability of interlayer coupling by external magnetic field in 2D material based field effect transistors is studied. External magnetic field can increase triplet electron-hole (e-h) pairs to promote interlayer coupling, where larger source-drain current is induced. Moreover, increasing the gate voltage or source-drain voltage, dipole–dipole interaction among the layers will be enhanced to weaken the tunability of source-drain current by magnetic field. This result reveals the magnetic field dependence of interlayer couplings in 2D materials and provides a guidance to develop new functional 2D material devices.
研究领域:
凝聚态物理
·
二维材料科学
·
纳米电子学
·
半导体器件物理
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·Vol. 45
·期 12
·15589-15595
·
IF 3.45
Sining Yun,Yuzhi Hou,Chen Wang,Yangliang Zhang,Xiao Zhou
Mo-based binary/ternary nanocomposites were designed and prepared via soft template synthesis by combining Mo 2 C and Bi/Mo 2 C into mesoporous carbon (MC). The materials were characterized by using various analytical and electrochemical techniques . When Mo 2 C/MC composites were used as counter electrodes (CEs) in iodide-mediated dye-sensitized solar cells (DSSCs), the power conversion efficiencies (PCEs) of the cells reached 7.29%, and the performance of DSSC with Bi/Mo 2 C/MC was 8.06%, which was much higher than that of the cell with Pt CE (7.08%). The excellent electrochemical stability of Mo-based nanocomposites in triiodide/iodide electrolyte indicated that they could be promising alternatives to Pt electrodes in DSSCs. This work provided a new idea for the development of metal/carbide/carbon nanocomposite CE materials for DSSCs.
研究领域:
材料科学
·
能源化学
·
电化学
·
纳米科技
✓ 已验证
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 38
·23415-23421
·
IF 3.108
Sheng Yuan,Ming-Jian Zhang,Xiaoyang Yang,Zongwei Mei,Yongji Chen,Feng Pan
MoS2, a representative two-dimensional transition metal dichalcogenide, gains significant interest due to its unique layered structure and electronic structure. In this work, a novel MoS2-based hybrid thin film was constructed by disordered stacking of MoS2–NMP hybrid particles, which were mainly composed of MoS2(NMP)3 molecules stacking in a nearly-parallel manner through S⋯H–C hydrogen bonds. Interestingly, it presents a higher work function (5.42 eV) than Au (5.32 eV), and a unique thickness-dependent conductivity with p-type semiconductor characteristic. Using it as the back contact of CdTe solar cells, the efficiency was improved by 2.6% compared to the traditional cells, mainly from the great improvement in short-circuit current density (Jsc). This significant improvement in solar performance was ascribed to the matchable energy levels at the CdTe/MoS2-based thin film interface and its unique thickness-dependent conductivity. This work opens a new direction for the extensive applications of TMD-based materials.
研究领域:
材料科学
·
光伏技术
·
纳米材料
·
半导体物理
·
表面科学
·
能源材料
✓ 已验证
DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2018
·
IF 2.631
Feng Chen,Long Wu,Zeping Zhou,Jiajun Ju,Zhengping Zhao,Mingqiang Zhong,Tairong Kuang
Lignin is the most abundant and important macromolecule in organic matter and its yield is second only to cellulose. Lignin is abundant in source, low in price, and has a large number of active groups such as methoxy group and carboxyl group, so it has great utilization value. We used lignin as a carbon source to prepare porous carbon nanosphere (PCN) materials, and in-situ synthesized the MoS 2 on its surface. The high specific surface area (∼462.8 m 2 /g), large pore volume and good electron conductivity of the porous carbon scaffold facilitated the reversible electro-chemical reaction of S towards metallic Li, and thus the nano-hybrid showed a high specific energy and excellent cycle stability which still remained 520 mAh/g after 50 cycles.
研究领域:
材料科学
·
能源化学
·
纳米科技
·
电化学
·
功能材料
✓ 已验证
DOI
高影响因子
RARE METALS
·
2023
·Vol. 42
·期 12
·3985-3992
·
IF 8.8
Yang Yang,Liang Qing-Rong,Zhu Chun-Li,Zheng Guo-Zhong,Zhang Jian,Zheng Shou-Jun,Lin Yung-Chang,Zheng De-Zhi,Zhou Jia-Dong
Van der Waals coupling with different stacking configurations can significantly affect the optical and electronic properties of ultrathin two-dimensional (2D) materials, which is an effective way to tune device performance. Herein, we report a salt-assisted chemical vapor deposition method for the synthesis of bilayer V-doped MoS 2 with 2H and 3R phases, which are demonstrated by the second harmonic generation and scanning transmission electron microscopy. Notably, the mobility of the 3R phase V-doped MoS 2 is 6.2% higher than that of the 2H phase. Through first-principles calculations, we further reveal that this particular behavior is attributed to the stronger interlayer coupling of 3R compared to the 2H stacking configuration. This research can be further generalized to other transition metal chalcogenides and will contribute to the development of electronic devices based on 2D materials in the future.
研究领域:
材料科学
·
纳米科技
·
凝聚态物理
·
二维材料
·
半导体材料
·
表面科学
·
计算材料学
✓ 已验证
DOI
高影响因子
Frontiers of Materials Science
·
2025
·Vol. 19
·期 3
·1-16
·
IF 2.3
Li Yumei,Deng Bingqian,Wang Jiexin,Li Jialong,An Wenbin,Fan Jian,Sun Peng
A molybdenum (Mo)-modified LaFeO 3 (LFMO) perovskite catalyst was synthesized to activate peroxymonosulfate (PMS) for the degradation of indole in solution. The catalyst was characterized by XRD, SEM, and XPS. Results indicate that LFMO possesses a higher specific surface area and more catalytic active sites compared to unmodified LaFeO 3 . XPS analysis reveals that the activation of PMS is mediated by Fe 2+ /Fe 3+ and Mo 4+ /Mo 6+ reduction–oxidation cycles. Oxygen vacancies generated by molybdenum substitution serve as reaction sites, which accelerate the dissociation of PMS and the production of reactive oxygen species. Chemical quenching experiments and EPR spectroscopic analyses were employed to elucidate the mechanism, highlighting the significant role of non-radical species in the removal of indole. Under optimal reaction conditions, the degradation efficiency of indole reached 90.53% within 30 min, demonstrating strong anti-interference against inorganic anions and natural organic matter. LFMO particles exhibit sustained catalytic activity and stability over five consecutive cycles. This LFMO/PMS system provides valuable insights for the development of non-radical degradation pathways based on PMS.
研究领域:
环境化学
·
催化科学
·
材料化学
·
环境污染控制
·
高级氧化过程
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2018
·Vol. 5
·期 9
·2092-2099
·
IF 5.106
Jinxue Guo,Ke Zhang,Yanfang Sun,Yingxia Zong,Ziyang Guo,Qingyun Liu,Xiao Zhang,Yongyao Xia
Layered MoS2 has been recognized as a promising low-cost alternative to Pt-based electrocatalysts towards the hydrogen evolution reaction (HER). Intensive interest has been mainly focused on designing MoS2 nanostructures with large amounts of active edge sites and fast charge transfer. Here we report the synthesis of vanadium and nitrogen co-doped MoS2 on reduced graphene oxide with new defect sites on the basal/edge planes and expanded interlayer spacing, which shows remarkable catalytic merits with an extremely low overpotential of 68 mV at 10 mA cm−2 and a Tafel slope of 41 mV dec−1. Its performance is superior to most current MoS2 electrocatalysts. In addition to the charge transfer benefits of the RGO substrate, the vanadium and nitrogen dopants trigger defect sites on the basal/edge planes, and an optimized electronic structure and expanded interlayer distance are also responsible for the enhancement in catalysis. This contribution may offer a potential way to design advanced MoS2 catalysts by modulating the defect sites and interlayer distance for efficient electrochemical water splitting.
研究领域:
材料科学
·
电化学
·
纳米催化
·
能源转换
·
表面科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Fei Huang,Sikun Zhou,Ziyang Yan,Sha Wang,Hong Zhang,Shutong Wang,Shouhuan Zhou
Electrode materials significantly impact supercapacitor performance and developing high-performance electrode materials is crucial in energy storage. Commonly used laser-induced electrode materials are currently limited by severe contamination and hard-to-change intrinsic properties. This paper proposes a method for fabricating high-performance supercapacitors by laser carbonizing the lignin composite fiber membranes with heating treatment. Lignin fiber can achieve superior tensile strength, stiffness, and carbonization degree under suitable heat treatment temperatures. Heat treatment at 450 °C has been proven to be the ideal temperature for supercapacitor performance. At a current density of 1 A/g, the supercapacitor can reach the highest specific capacitance of ∼391.2F/g. In addition, doping MoS 2 boosted the device's performance to a specific capacitance of ∼527.8F/g, a power density of ∼500 W/kg, and an energy density of ∼73 Wh/kg at the same current density. In addition, lignin fibers are ideal materials in electronic textiles due to their soft, thin, and breathable properties. This study provides supportive evidence and technical guidance for improving the performance of flexible wearable supercapacitors.
研究领域:
储能技术
·
材料科学
·
纳米技术
·
电化学
·
柔性电子学
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 4
·1-13
·
IF 5.3
Li Guiyin,Yan Ruijie,Chen Wei,Wu Runqiang,Liang Jintao,Chen Jiejing,Zhou Zhide
Golgi protein 73 (GP73) is a new serum marker associated with early diagnosis and postoperative assessment of hepatocellular carcinoma (HCC). Herein, an electrochemical/fluorescence dual-signal biosensor was designed for determination of GP73 based on molybdenum disulfide/ferrocene/palladium nanoparticles (MoS 2 -Fc-PdNPs) and nitrogen-doped graphene quantum dots (NGQDs). GP73 aptamer (Apt) was labeled with NGQDs to form the NGQDs-Apt fluorescence probe. MoS 2 -Fc-PdNPs served not only as the fluorescence quencher but also as electrochemical enhancer. The sensing platform (NGQDs-Apt/MoS 2 -Fc-PdNPs) was formed based on the fluorescence resonance energy transfer (FRET) mechanism. In the presence of GP73, the specific binding of NGQDs-Apt to GP73 interrupted FRET, restoring the fluorescence of NGQDs-Apt at λ ex/em = 348/438 nm and enhancing the oxidation current of Fc in MoS 2 -Fc-PdNPs at 0.04 V through differential pulse voltammetry (DPV). Under the optimal conditions, the DPV current change and fluorescence recovery have a good linear relationship with GP73 concentration from 1.00 to 10.0 ng/mL. The calibration equation for the fluorescence mode was Y 1 = (0.0213 ± 0.00127) X + (0.0641 ± 0.00448) and LOD was 0.812 ng/mL (S/N = 3). The calibration equation of the electrochemical mode was Y 2 = (3.41 ± 0.111) X + (1.62 ± 0.731), and LOD of 0.0425 ng/mL (S/N = 3). The RSDs of fluorescence mode and electrochemical mode after serum detection were 1.62 to 5.21% and 0.180 to 6.62%, respectively. By combining the electrochemical and fluorescence assay, more comprehensive and valuable information for GP73 was provided. Such dual-mode detection platform shows excellent reproducibility, stability, and selectivity and has great application potential. Graphical Abstract
研究领域:
生物医学工程
·
肿瘤学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）