APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jiangfan Liao,Guoqiang Lv,Xianghua Zhao,Tao Zhou,Renjie Li,Qingrun Xie,Xiufeng Li,Mingli Xu,Yongsheng Ren,Wenhui Ma
Photoelectrochemical (PEC) water splitting represents a promising strategy for sustainable hydrogen production. The development of highly efficient photoelectrocatalysts that facilitate charge transport and minimize overpotential is therefore of great significance. In this work, a synergistic approach was employed by constructing a PCN/WS 2 heterojunction through electrostatic self-assembly and introducing sulfur vacancies via HF etching. The as-prepared PCN/WS 2 -Vs composite demonstrated outstanding HER performance: under illumination, the overpotential at 10 mA·cm −2 decreased from 157 to 73 mV, and the Tafel slope was reduced from 223 to 114 mV·dec -1 . Moreover, the optimized photocathode delivered an applied bias photon-to-current efficiency (ABPE) of 1.33 % and achieved a photocurrent density of 7.65 mA·cm −2 at 0 V (vs. RHE). Remarkably, the photocathode enabled stable continuous operation for 150 h under simulated solar irradiation. Spectroscopic characterizations (XPS, UV–vis, and EPR) confirmed band structure modulation, including a narrowed bandgap and a downward-shifted valence band, which collectively promoted efficient charge separation and transfer. These results highlight the synergistic contributions of p-n heterojunction formation and sulfur-vacancy engineering toward enhanced PEC-HER, offering an effective strategy for designing efficient, durable, and noble-metal-free photoelectrocatalysts.
研究领域:
材料科学
·
能量转换
·
光催化
·
电化学
·
纳米材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Yuxi Pi,Bo Liu,Zhen Li,Yukun Zhu,Yang Li,Fengbao Zhang,Guoliang Zhang,Wenchao Peng,Xiaobin Fan
A novel three-dimensional (3D) photoanode consisting of TiO 2 nanorod arrays (TiO 2 NAs) coated by exfoliated WS 2 nanosheets was fabricated for enhanced photoelectrochemical water oxidation . Mixed phase WS 2 nanosheets with 1 T percentage of 55% were exfoliated by the lithium insertion, which were then coated on the top of TiO 2 NAs by a drop-casting method. By optimizing the loading amount of WS 2 , a maximum photocurrent of ∼1.8 mA/cm 2 could be obtained at +1.8 V vs. RHE under AM 1.5 irradiation (100 mW/cm 2 ), which is 2.3 times higher compared to the pure TiO 2 NAs (0.8 mA/cm 2 ). The enhanced photo-activity should be attributed to the presence of the mixed phase WS 2 nanosheets, which have excellent charge transport ability and can accept photogenerated holes for water oxidation.
研究领域:
材料科学
·
纳米科技
·
光催化
·
能源化学
·
半导体光电化学
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2016
·Vol. 18
·期 45
·31211-31216
·
IF 4.449
Xiaolong Lu,Rongguo Wang,Lifeng Hao,Fan Yang,Weicheng Jiao,Ping Peng,Feng Yuan,Wenbo Liu
Oxidative etching has been proved to be an efficient top-down method to prepare quantum dots (QDs) of layered transition-metal dichalcogenides which possess unique properties and have potential applications in various areas. Here, one facile and green oxidative etching method induced by UV irradiation is reported to prepare the QDs of MoS2/WS2 in aqueous solution, respectively. A prominent morphology change occurred to the nanosheets of MoS2/WS2 after irradiation and finally they were etched to ultrasmall nanoparticles which were proved to be the QDs. Insight into the etching mechanism was discussed in detail and hydroxyl free radicals (˙OH) were conclusively demonstrated to play the main role in etching nanosheets. From another point of view, this work also proves the crucial long-term photo instability of MoS2/WS2 since there are increasing photo-related applications of them and points out an easy way to degrade their nanosheets.
研究领域:
材料科学
·
纳米技术
·
光化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Xu Han,Guoping Liu,Li Wu,Xiubo Min,Zhongsheng Wen
Due to the large ionic radius of Na⁺, sodium storage is often accompanied by sluggish ion transport and limited interfacial reaction kinetics, posing significant challenges for the development of high-performance sodium-ion battery electrode materials. To address these issues, a Co-modified WS 2 /rGO composite was constructed via a hydrothermal method combined with subsequent thermal treatment. The Co-WS 2 /rGO electrode delivers a reversible capacity of 283.5 mAh g -1 after 300 cycles at a current density of 2 A g -1 , along with favorable rate capability. Kinetic analyses reveal a higher surface-controlled contribution and lower charge-transfer resistance for Co-WS 2 /rGO compared with WS 2 /rGO. Operando electrochemical analyses further reveal reduced polarization and improved reaction reversibility during Na⁺ storage. These results demonstrate that Co modification combined with rGO incorporation is an effective strategy for improving the interfacial electrochemical kinetics and sodium-storage performance of WS 2 -based anodes. Download: Download high-res image (196KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2025
·
IF 6.6
Shoujin Zhu,Weibing Wu,Songlin Zhou,Zongyang Zhang,Shuangjiu Feng,Xian Song Liu,Xucai Kan
This study utilized FeSiAl with 200- and 600-mesh sizes as the raw material and a layered 2D semiconducting material (WS 2 ) as an insulation coating agent. FeSiAl/2.25 wt%WS 2 composites were developed through ultrasonic mixing, and the influence of the particle size on their morphology and magnetic properties was systematically investigated. Results obtained from scanning electron microscopy revealed a uniform coating of the 2D layered WS 2 on the surface of the FeSiAl particles, thus forming an efficient inorganic coating layer. Composite permeability experiments indicated that reducing the FeSiAl particle size not only enhanced the relaxation frequency( f r ) of the FeSiAl/2.25 wt%WS 2 composites but also lowered the eddy current losses, making these composites highly suitable for high-frequency operation and applications. Sample B exhibited lower magnetic loss than Sample A, with a magnetic loss equal to 367 kW/m 3 at 1 MHz and 20 mT.
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Mei Dong,Wenjun Li,Liang Geng,Ruixue Huang,Hongli Han,Yuan Liu
Defect engineering has emerged as a powerful strategy for enhancing photocatalytic performance. In this paper, a novel dual-defect 1T-WS 2 /Cd 0.5 Zn 0.5 S (WS v /CZS v ) Schottky heterojunction was successfully fabricated via a combined solvothermal-hydrothermal approach. Electron paramagnetic resonance (EPR) and high-resolution TEM (HRTEM) confirmed the presence of dual sulfur vacancies. The optimized WS v /CZS v composite exhibits exceptional hydrogen evolution performance, achieving a remarkable rate of 3060.63 μmol·g −1 ·h −1 , which are 9.83 and 2.54 times higher than that of pure CZS and CZS v , respectively. Notably, the catalyst maintained over 90 % of its initial activity after four consecutive photocatalytic cycles, demonstrating superior stability. Comprehensive characterization through electrochemical impedance spectroscopy (EIS), steady-state photoluminescence (PL), and transient photocurrent measurements revealed that the dual-defect system significantly enhances carrier separation efficiency. This improvement arises from three synergistic effects: electron-trapping capability of dual defect sites, elevated Schottky barrier, and superior electrical conductivity of the 1T-WS 2 . Furthermore, the metallic characteristics and sulfur vacancies in 1T-WS 2 synergistically provide abundant active sites for photocatalytic hydrogen evolution on both basal planes and edges. Density functional theory (DFT) calculations indicate that the dual defects optimize charge distribution and achieve an ideal hydrogen adsorption free energy. The energy band alignment and charge transfer mechanism were systematically investigated using Mott-Schottky (M-S) analysis and ultraviolet photoelectron spectroscopy (UPS). This work explores the synergistic interactions between different types of sulfur defects and provides new insights into the coupling of defect engineering.
✓ 已验证
产品关联
DOI
高影响因子
Microsystems & Nanoengineering
·
2024
·Vol. 10
·期 1
·1-10
·
IF 7.3
Guan Kejie,Li Yinxiao,Liu Lin,Sun Fuqin,Wang Yingyi,Zheng Zhuo,Zhou Weifan,Zhang Cheng,Cai Zhengyang,Wang Xiaowei,Feng Simin,Zhang Ting
Owing to the controllable growth and large-area synthesis for high-density integration, interest in employing atomically thin two-dimensional (2D) transition-metal dichalcogenides (TMDCs) for synaptic transistors is increasing. In particular, substitutional doping of 2D materials allows flexible modulation of material physical properties, facilitating precise control in defect engineering for eventual synaptic plasticity. In this study, to increase the switch ratio of synaptic transistors, we selectively performed experiments on WS 2 and introduced niobium (Nb) atoms to serve as the channel material. The Nb atoms were substitutionally doped at the W sites, forming a uniform distribution across the entire flakes. The synaptic transistor devices exhibited an improved switch ratio of 10 3 , 100 times larger than that of devices prepared with undoped WS 2 . The Nb atoms in WS 2 play crucial roles in trapping and detrapping electrons. The modulation of channel conductivity achieved through the gate effectively simulates synaptic potentiation, inhibition, and repetitive learning processes. The Nb-WS 2 synaptic transistor achieves 92.30% recognition accuracy on the Modified National Institute of Standards and Technology (MNIST) handwritten digit dataset after 125 training iterations. This study’s contribution extends to a pragmatic and accessible atomic doping methodology, elucidating the strategies underlying doping techniques for channel materials in synaptic transistors.
研究领域:
材料科学
·
神经网络
·
电子工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 14
·7786-7794
·
IF 3.049
Zhuang Xu,Wenjing Lou,Gaiqing Zhao,Dongdong Zheng,Junying Hao,Xiaobo Wang
Tungsten disulfide–polydopamine–copper (WS2–PDA–Cu) nanocomposites were first prepared by a green and effective biomimetic strategy and then used as a lubricant additive in polyalkylene glycol (PAG). The biomimetic strategy is inspired by the adhesive proteins in mussels. WS2 nanosheets were decorated by uniformly dispersed Cu nanoparticles (Cu NPs). The WS2–PDA–Cu nanocomposites with good dispersion stability, showed better friction reducing and anti-wear properties than WS2, Cu NPs and WS2–Cu dispersed in PAG base oil. The average friction coefficient and wear volume were reduced by 33.56% and 97.95%, respectively, at 150 °C under a load of 100 N for the optimal concentration of 0.9 wt%. The lubrication mechanism was discussed.
研究领域:
材料科学
·
纳米技术
·
机械工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Zhiqiang Zhang,Xiaofeng Lin,Shuli Tang,Qitong Huang
The development of highly active and stable electrocatalysts is essential to solve energy and environmental problems and realize sustainable social and economic development. Herein, we synthesized a bimetallic sulfide material by a kinetically controlled low-temperature solid-phase reaction. The bimetallic sulfide improves the conductivity of the electrocatalysts by optimized electronic structure, and the coupling effect at the heterogeneous interface of WS 2 and NiS x increases the charge density on the S site at W– S –Ni, making it easier for the electrocatalysts to trap the active material in solution. In addition, nanosheet clusters expose abundant catalytic sites, which together improve hydrogen evolution reaction (HER) for catalytic activity . Optimized WS 2 /NiS x composite show near-precious metal catalyst activity with an overpotential at 10 mA cm −2 of only 72 mV in alkaline media , which exhibits excellent catalytic stability and outperforms most non-precious metal electrocatalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Aiqin Liang,Danhua Zhu,Liming Xu,Weiqiang Zhou,Jingkun Xu,Xuemin Duan
A flexible ternary composite film based on polyvinyl alcohol (PVA), polyaniline (PANI) and WS2 was prepared via the electropolymerization of the prefabricated PVA/aniline/WS2 hydrogel. As-prepared PVA/PANI/WS2 composite film was characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, energy dispersive X-ray spectrometry, and electrochemical technologies. The PVA/PANI/WS2 film had a specific capacitance of 2437 mF cm -2 at 2 mV s -1 in H2SO4 solution (1.0 M). After 5000 cycles, the capacitance retention reached 70% of initial specific capacitance. The high electrochemical behavior of composite film was mainly attributed to the ionic conductivity of PVA and the integration of pseudocapacitance of PANI and WS2. This flexible PVA/PANI/WS2 film provided a potential application in flexible supercapacitor.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Bingxian Wu,Junpeng Xiao,Shouchao Fu,Hao Yin,Lu Li,Jing Yao,Hong Gao
Tungsten disulfide (WS 2 ) is considered as a promising anode material for high-performance lithium-ion batteries (LIBs) result from its inherent characteristics such as high theoretical capacity, large interlayer spacing and weak interlayer Van der Waals force . Nevertheless, WS 2 has the drawbacks of easy agglomeration, severe volume expansion and high Li + migration barrier, which lead to rapid capacity degradation and imperfect rate ability. In this work, a novel two-dimensional (2D) hierarchical composite (Ti 3 C 2 /WS 2 ) consisting of WS 2 nanosheets vertically grown on titanium carbide (Ti 3 C 2 ) nanosheets is prepared. Thanks to this distinctive hierarchical structure and synergy between WS 2 and Ti 3 C 2 , the Ti 3 C 2 /WS 2 composite demonstrates exceptional electrochemical performance in LIBs. In addition, we investigate the effect of the mass proportion of WS 2 in Ti 3 C 2 /WS 2 composite on the electrochemical performance, and find that the optimal mass ratio of WS 2 is 60%. As expected, the optimal electrode exhibits a high specific capacity (650 mAh/g at 0.1 A/g after 100 cycles) and ultra-long cycle stability (400 mAh/g at 1.0 A/g after 5000 cycles).
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Qiyilan Guang,Baoyu Huang,Jun Yu,Maryam Bonyani,Mohammad Moaddeli,Mansour Kanani,Ali Mirzaei,Hyoun Woo Kim,Sang Sub Kim,Xiaogan Li
In this paper, platinum sulfide decorated WS 2 microflakes (PtS/WS 2 ) heterostructure nanocomposites were prepared by an in-situ chemical reduction process. The chemiresistive-type gas sensor based on the synthesized PtS/WS 2 heterostructure nanocomposites exhibited a significantly improved sensing properties compared to that of the pure WS 2 microflakes at different concentration of NH 3 from 1 ppm to 10 ppm at room temperature . As the concentrations of PtS nanoparticles decorated on the surface of WS 2 microflakes increased, the response of the PtS/WS 2 heterostructure sensor to ammonia firstly increased when the concentration of PtS increased up to 1 wt%, whereas above 1%, the response decreased instead. Moreover, it was found that the response speeds of the PtS-decorated WS 2 were significantly improved compared to that pure WS 2 . The sensors also exhibited excellent selectivity to formaldehyde, toluene, acetone , methanol and ethanol at room temperature. The sensing mechanisms were studied by using the in-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). The enhanced sensing properties could be explained by “electronic sensitization” effect induced by the PtS/WS 2 heterostructure, being confirmed by density functional theory (DFT) calculations.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）