JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 26
·12031-12040
·
IF 3.553
Xiong Man,Qian Jingwen,Yang Kai,Chen Zihe,Mei Tao,Wang Jianying,Li Jinhua,Yu Li,Wang Xianbao
Controlling the inherent polysulfide shuttle process has been the key research topic to solve the irreversible capacity loss problem of Li–S battery. By skillfully designing, hierarchical brain coral-like WS 2 nanosheets are synthesized. The novel structure is consisted of WS 2 nanosheets arrayed along the same crystal plane, which expose a large number of adsorption active sites and enhance the adsorption of polysulfides. At the same time, the multilayer sheet structure has a large specific surface area and increases the sulfur loading. The brain coral-like WS 2 /S cathode exhibits excellent electrochemical properties, which delivers an initial discharge specific capacity of 1308 mAh g −1 at 0.1 C. And when cycles at 2 C, the discharge specific capacity is maintained at 721 mAh g −1 after 500 cycles, together with a low decay of 0.06% per cycle.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Peng Cheng,Yan Chen,Yi-Hang Gu,Xi Yan,Wan-Zhong Lang
Hybrid WS 2 /GO two-dimensional membranes were developed to achieve finely molecular sieving. The size of nanochannels in WS 2 membrane became smaller and more regular after the introduction of GO nanosheets into WS 2 membrane according to XRD and separation results. The hydrated hybrid WS 2 /GO membrane with 15 wt% GO (GO15WS 2 ) exhibited high rejection (>90%) for dyes and ions with a hydrated radius above 4.9 Å. A water permeance of 159.6 L/m 2 ·h·bar and a Methylene Blue (MnB) rejection of 96.3% were achieved through hydrated hybrid GO15WS 2 membrane, which was excellent compared with reported two-dimensional membranes based on TMDs . Moreover, the nanochannels in GO15WS 2 membrane also presented strong rigidity under a pressure loading up to 0.5 MPa. In addition, the half-dried GO15WS 2 membrane possessed high tolerance to shear stress, and the separation performance changed slightly during a 120 h-cross-flow filtration, which made the hybrid GO15WS 2 membrane promising in water filtration .
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2015
·
IF 5.337
M. Zirak,M. Zhao,O. Moradlou,M. Samadi,N. Sarikhani,Q. Wang,H.-L. Zhang,A.Z. Moshfegh
We report the well-controlled preparation of WS 2 nanosheets–CdS nanoparticle heterojunction for photoelectrochemical (PEC) water splitting application. The WS 2 nanosheets with an average thickness of ~5 nm and lateral dimensions of ~200 nm were synthesized via liquid phase exfoliation of bulk WS 2 in water/ethanol solution, followed by deposition onto ITO substrate via electrophoretic method. CdS nanoparticles were grown via facile successive ion layer absorption and reaction (SILAR) method. Using these two well-controlled methods, CdS/WS 2 /ITO and WS 2 /CdS/ITO systems were fabricated. The loading of WS 2 nanosheets was controlled by the deposition condition and the heterojunction was optimized for enhanced photoelectrochemical response under simulated sunlight irradiation. The fabricated electrodes were characterized by various analytical techniques as well as PEC response and electrochemical impedance spectroscopy (EIS). Our results showed that the CdS/WS 2 /ITO heterojunction exhibits a stable photo-current density which is 3 times higher than the CdS/ITO electrode. In contrast, photo-current density of the WS 2 /CdS/ITO electrode was lower than that of the bare CdS/ITO, indicating that an appropriate energy level cascade is essential for achieving enhanced PEC response. A charge transfer mechanism was proposed to explain the observed PEC enhancement. This work indicates that the exfoliated WS 2 nanosheet is a promising material for stable photoelectrochemical applications.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
OPTICS COMMUNICATIONS
·
2017
·
IF 1.588
Xiaohui Ren,Hui Qiao,Zongyu Huang,Pinghua Tang,Shuhua Liu,Siwei Luo,Hao Yao,Xiang Qi,Jianxin Zhong
Hybridization of WS 2 and TiO 2 by a facile hydrothermal method was realized to construct WS 2 - TiO 2 heterostructure photodetector which exhibits preferable photoresponse activity in association with structural robustness. The relationship between photocurrent density and applied bias potential has also been uncovered. Photoresponse measurements demonstrate the photocurrent density of WS 2 - TiO 2 hybrid nanosheets (HNs) has been greatly improved when compared to that of as-prepared TiO 2 , while the steady current density can achieve 130 nA ∕ cm 2 when applied potential is 1.0 V. Besides that, the stability test exhibits no detectable distinction after processing 15 cycles. The improved photoresponse activities can be attributed into the positive synergetic effect between the WS 2 and TiO 2 . We hope the present work can provide fundamental implementations about WS 2 - TiO 2 heterostructure photodetector, meanwhile, offering it potential availabilities for constructing high-performance photodetectors.
研究领域:
材料科学
·
光电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Haopeng Luo,Xin Zhou,Xiaojie Guo,Zhiyong Fang,Quanyuan Chen,Juan Zhou
The greatest constraint in the advanced oxidation processes involved Fe(II)/PMS was the low utilization of Fe(II) and PMS. In the present study, the co-catalytic effect of WS 2 on the Fe(II)/PMS system for the degradation of organics was investigated. In the presence of WS 2 , Fe(III) was reduced to Fe(II) during the reaction and resulted in improved decomposition of PMS as well as the degradation of 4-chloriphenol (4-CP). The decomposition rate of PMS and degradation efficiency of 4-CP were 10% and 25% in the Fe(II)/PMS process, while the efficiencies respectively increased to 99% and 100% in the WS 2 assisted Fe(II)/PMS system. The degradation of 4-CP was completed via the free radical pathway and SO 4 • - played a more important role than other active species. Low concentration of inorganic ions such as Cl − and HCO 3 − exhibited irrelevant effect while humic acid showed significant suppression on the WS 2 /Fe(II)/PMS system. Additionally, characterization and recycle results implied that WS 2 maintained a good stability during the co-catalytic processes.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2025
·
IF 9
Baohua Liu,Xiangsheng Han,Keyan Yang,Jiankang Zhang,Hongzhen Cai
Tungsten disulfide (WS 2 ), a two-dimensional adsorbent material, has garnered great attention in removing lead ions (Pb 2+ ) from water due to their extensive exposed adsorption sites. However, WS 2 nanosheets inevitably agglomerated and stacked during the preparation and adsorption process, leading to reduced adsorption efficiency. Current method of enhancing WS 2 dispersion is mainly blending with synthetic polymers, but these synthetic polymers themselves do not possess adsorption properties, resulting adsorption effect enhancement poorly. Here, lignin extracted from walnut shells (WS) was intercalated into bulk WS 2 to prepare highly dispersible Lignin/WS 2 composites with synergistic adsorption effects. The spatial resistance and electrostatic repulsion of the intercalated lignin effectively exfoliated bulk WS 2 and stabilized their dispersion. The synergistic adsorption arises from lignin’s oxygen-containing groups and WS 2 nanosheets’ sulfur-rich surface, which significantly enhanced Pb 2 + removal (∼66.9 mg/g). This value surpassed pure lignin and bulk WS 2 by 1.7 and 25.0 times, respectively. Adsorption follows pseudo-second-order kinetic and Freundlich isotherm model, indicating that the adsorption of Pb 2+ by the Lignin/WS 2 composite belongs to multi molecular layer chemical adsorption. This work provides a novel strategy for lignin-based adsorbents in water remediation.
研究领域:
环境科学
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材料科学
·
水处理
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纳米技术
·
吸附技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Jing Wang,Yuping Wang,Junye Cheng,Yiru Fu,Yao Li,Wangli Nie,Jingwei Wang,Bin Liu,Deqing Zhang,Guangping Zheng,Maosheng Cao
Defect engineering could provide new ideas for the design of transition metal disulfide electromagnetic wave (EMW) absorbers with high performance. Since the effects of dipoles on impedance matching and EMW absorption are crucial for the development of novel absorbers, the polarization attenuation dependence on defect engineering should be understood at micro- and macro-scales. In this paper, it is found that the defect-rich WS 2 nanoflowers synthesized by the cold plasma method possess excellent EMW absorption properties. Cold plasma treatment of materials is easy to perform and maintains the original shape of the material to a high degree. The formation of defects results in abundant electrochemically active sites, increased multiple reflection losses, improved dielectric properties and impedance matching in the materials. The RL min of the defect-rich material with a thickness of 3.19 mm is as high as −54.36 dB at 8.16 GHz, and the effective absorption bandwidth is 4.72 GHz. The results reveal that the formation of defective vacancies enhances the effects of dipole polarization of the material on improving its EMW absorption properties. Thus, this work provides not only a facile preparation route for novel EMW-absorbing materials, but also a new strategy for tunning defects in transition metal disulfides.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
ChemElectroChem
·
2018
·Vol. 5
·期 21
·3222-3228
·
IF 4.446
Jianhui Li,Haiting Yan,Wei Wei,Xifei Li,Lingjie Meng
Graphical An advanced TMDs heterojunction : A WS 2 heterojunction based on liquid-phase exfoliated graphene (LEGr@WS 2 ) is synthesized by a one-pot microwave-assisted solvothermal method. Benefiting from the two-dimensional hierarchical structures and good interfacial contact between WS 2 and LEGr sheets, the LEGr@WS 2 heterojunction exhibits good rate capability and cycling stability as anode material for lithium-ion batteries. To improve the electrical conductivity and the cycling stability of layered transition metal disulfides (TMDs) as lithium-ion battery anode, graphene@WS 2 heterojunction composites are prepared by a facile one-pot process, involving liquid-phase exfoliation of graphene in N -methylpyrrolidone, followed by in-situ growth of WS 2 in the graphene dispersion induced by a microwave-assisted solvothermal method. The liquid-phase exfoliated graphene (LEGr) with exceptional atomic structure not only serves as a substrate to couple WS 2 , but also serves as a mini-current collector for the rapid transport of electrons within the anode. The LEGr-based heterojunction WS 2 composites exhibit improved lithium storage performance compared to the counterpart based on graphene oxide (GO), including higher lithium storage capacity, superior rate capability and outstanding cycling stability. This protocol enables processing and construction of advanced TMD heterojunction electrodes based on LEGr using an economical pathway.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Maomiao Xiang,Jun Fu,Chenxi Huang,Yue Xing,Jiefu Zhang,Hualing Zeng,Xiang Shao
Monolayer transition-metal dichalcogenides (TMDs) have registered attractive potential applications in optoelectronics, spintronics, and valleytronics. Here, we develop a simple chemical vapor deposition method to directly grow large-size monolayer WS2 on an atomically flat rutile TiO2(110) substrate. The variety of microscopic and spectroscopic characterizations reveals the highly single crystallinity of the as-grown WS2 and the atomically clean WS2/TiO2 interface. Such structural perfection renders a neutral excitonic photoluminescence of WS2 with extremely small spectral broadening of around 20 meV at cryogenic temperature. Moreover, the low concentration of defect leads to the suppressed intervalley scattering, while the efficient interfacial electron transfer reduces the Coulomb interaction between the valleys of the WS2, which thus enhance the valley polarization and coherence significantly so that it can reserve up to room temperature under ambient conditions. These results demonstrate that the substrate tuning corroborated by interface control can be a promising strategy to utilize the TMDs in practical valleytronics.
研究领域:
材料科学
·
凝聚态物理
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Baoguo Zhao,Guoquan Suo,Rongrong Mu,Chuanjin Lin,Jiarong Li,Xiaojiang Hou,Xiaohui Ye,Yanling Yang,Li Zhang
The growing demand for clean energy has heightened interest in sodium-ion batteries (SIBs) as promising candidates for large-scale energy storage. However, the sluggish reaction kinetics and significant volumetric changes in anode materials present challenges to the electrochemical performance of SIBs. This work introduces a hierarchical structure where WS 2 is confined between an inner hard carbon core and an outer nitrogen-doped carbon shell, forming HC@WS 2 @NCs core–shell structures as anodes for SIBs. The inner hard carbon core and outer nitrogen-doped carbon shell anchor WS 2 , enhancing its structural integrity. The highly conductive carbon materials accelerate electron transport during charge/discharge, while the rationally constructed interfaces between carbon and WS 2 regulate the interfacial energy barrier and electric field distribution, improving ion transport. This synergistic interaction results in superior electrochemical performance: the HC@WS 2 @NCs anode delivers a high capacity of 370 mAh g −1 at 0.2 A/g after 200 cycles and retains261 mAh g −1 at 2 A/g after 2000 cycles. In a full battery with a Na 3 V 2 (PO 4 ) 3 cathode, the Na 3 V 2 (PO 4 ) 3 //HC@WS 2 @NC full-cell achieves an impressive initial capacity of 220 mAh g −1 at 1 A/g. This work provides a strategic approach for the systematic development of WS 2 -based anode materials for SIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
DESALINATION
·
2020
·
IF 7.098
Jiao-Jiao Han,Qiu-Yue Zhang,Min-Yue Huang,Yan Chen,Xi Yan,Wan-Zhong Lang
Two-dimensional (2D) membranes have been widely used in water purification due to their excellent separation performance. Herein, 2D WS 2 membranes were constructed on polyamide (PA) and anodic aluminum oxide (AAO) substrates for efficient dye desalination . Different with previous reports, we discovered that the dry PA supported WS 2 (WS 2 /PA) membrane still permitted water to pass through, relating to the rougher surface of PA than that of AAO, which formed more larger interlayer spacing of 1.18 nm in the WS 2 /PA membrane. Moreover, the WS 2 /PA membrane had a higher water permeance and a lower salt rejection compared with that of AAO supported WS 2 (WS 2 /AAO) membrane with similar dye rejection, and a water permeance of 597 L/m 2 ·h·bar was achieved through a 250 nm-thick WS 2 /PA membrane with a Rose Bengal (RosB) rejection of 98.5% and a NaCl rejection of 0.3%. And this water permeance is approximately one order of magnitude higher than that through reduced graphene oxide membranes in a solvation state (S-rGO) with similar dye and salt rejections, indicating their promising prospect in the application of dye desalination.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
Small
·
2024
·
IF 13
Boxiang Gao,Weijun Wang,You Meng,Congcong Du,Yunchen Long,Yuxuan Zhang,He Shao,Zhengxun Lai,Wei Wang,Pengshan Xie,SenPo Yip,Xiaoyan Zhong,Johnny C. Ho
As demand for higher integration density and smaller devices grows, silicon-based complementary metal-oxide-semiconductor (CMOS) devices will soon reach their ultimate limits. 2D transition metal dichalcogenides (TMDs) semiconductors, known for excellent electrical performance and stable atomic structure, are seen as promising materials for future integrated circuits. However, controlled and reliable doping of 2D TMDs, a key step for creating homogeneous CMOS logic components, remains a challenge. In this study, a continuous electrical polarity modulation of monolayer WS 2 from intrinsic n-type to ambipolar, then to p-type, and ultimately to a quasi-metallic state is achieved simply by introducing controllable amounts of vanadium (V) atoms into the WS 2 lattice as p-type dopants during chemical vapor deposition (CVD). The achievement of purely p-type field-effect transistors (FETs) is particularly noteworthy based on the 4.7 at% V-doped monolayer WS 2 , demonstrating a remarkable on/off current ratio of 10 5 . Expanding on this triumph, the first initial prototype of ultrathin homogeneous CMOS inverters based on monolayer WS 2 is being constructed. These outcomes validate the feasibility of constructing homogeneous CMOS devices through the atomic doping process of 2D materials, marking a significant milestone for the future development of integrated circuits.
研究领域:
材料科学
·
电子工程
·
半导体物理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）