IEEE SENSORS JOURNAL
·
2024
·
IF 4.3
Cuixian Luo,Yimeng Dong,Yongjiao Sun,Yurong Huang,Lingrong Xue,Lifang Ren,Daming Wang,Minzhe Qin,Xinke Li
Tungsten disulfide (WS2) is emerging with dazzling visibility as a “layered material beyond graphene and molybdenum disulfide” due to its exquisite tunable electronic, surface structure, high carrier mobility, and physicochemical stability. In this article, In2O3 and Au nanoparticles (NPs) co-modified WS2 microsheets were prepared for detecting NO2 at room temperature (RT). The In2O3 and Au NPs were anchored on the surface of WS2 microsheets, which could be observed by the characterization. The NO2 sensing performance at RT was optimized by adjusting the contents of In2O3 and Au NPs. The proposed gas sensor based on Au1WIn6 (WS2 microsheets co-modified with 6 wt% In2O3 and 1 wt% Au NPs) showed the highest response (46.91 to 50 ppm NO2), limit of detection (LOD; 18.9 ppb), excellent linearity within the test range, and good stability under various relative humidity (RH), bending degrees, and bending times. The excellent result is attributed to the formation of a heterojunction, which increases the number of ionized oxygen adsorption sites and facilitates the reaction between NO2 gas and Au1WIn6. Therefore, it is believed that decorating WS2 microsheets with metal oxide and noble metal NPs is a promising strategy to improve the NO2 sensing property at RT.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Ziyu Qin,Chao Ouyang,Jian Zhang,Li Wan,Shimin Wang,Changsheng Xie,Dawen Zeng
Recently, Tungsten disulfide (WS 2 ) nanosheets are widely used for room-temperature NH 3 sensing. However, the lower sensitivity and the microstructural instability severely limit its potential application. Here, few- or mono-layer WS 2 nanosheets decorated with different amounts of TiO 2 quantum dots (QDs) were successfully prepared for room-temperature NH 3 sensing. The gas sensing studies revealed that the nanohybrids exhibited significantly enhanced sensitivity to NH 3 at room temperature. The response of nanohybrids with the optimal molar ratio to 250 ppm NH 3 is nearly 17 times higher than that of the pristine WS 2 . Especially, the TiO 2 QDs decorated WS 2 nanohybrids showed almost no decline in sensitivity after several testing cycles, indicating the long-term stability of the nanohybrids-based sensing materials. The sensing mechanism based on the largely enhanced sensitivity and the long-term stability of nanohybrids also discussed in detail. It was believed that the largely enhanced sensitivity was attributed to the effective electron transfer between the WS 2 and the TiO 2 QDs through S O Ti bonding, which was confirmed by XPS analysis. We hope that this work could help us to further understand the QDs sensitization mechanism and could provide a guideline to explore more transition metal dichalcogenides-based gas sensors with even higher sensing performances.
研究领域:
材料科学
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传感器技术
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纳米技术
✓ 已验证
DOI
高影响因子
CHEMICAL PHYSICS
·
2019
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IF 1.822
Sihong Zhang,Jianyu Wang,Yan Lu,Weiwei Hou,Kai Cao,Shouhui Guo,Zhendong Wang,Li Wang
Highly ordered arrays of WS 2 crystals are grown on the SiO 2 /Si substrate using Pt/Ti metal as seed materials by a low pressure chemical vapor deposition method. High magnification SEM images and Raman spectrum reveal that the WS 2 flakes are induced and grown around the Pt/Ti metal, and the diameter of a single unit is up to 100 μm, which have contribute to the direct construction of functional devices on the substrate. HRTEM measurements further confirm that the obtained flakes are the WS 2 crystal with good crystallinity. The results show that highly ordered arrays of WS 2 crystals will have potential applications in electronic and optoelectronic devices.
研究领域:
材料科学
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纳米技术
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Yijia Zhou,Xiaofeng Zhao,Jiangshan Chen,Meng Gao,Zhaohua He,Shuhong Wang,Cheng Wang
For nonvolatile memory devices, the design and synthesis of their substrate materials are very important. Due to the versatility and large-area fabrication of the low-temperature spin coating process, organic/inorganic nanomaterials as active layers of memory devices have been deeply studied. Inorganic nanoparticles can engage in interactions with polymers via external voltage. WS2 NPs have a large specific surface area and good conductivity. They can be used as the charge trap center in the active layer, which is conducive to the charge transfer in the active layer. Poly[2,7-9-(9-heptadecanyl)-9H-carbazole-co-benzo[4,5] imidazole[2,1-α] isoindol-11-one] (PIIO) was synthesized via the Suzuki coupling reaction. ITO/PIIO/Al and ITO/PIIO:WS2 NP/Al devices were prepared by the spin coating method and vacuum evaporation technology. All devices showed tristable switching behavior. The influence of the WS2 mass fraction on memory performance was studied. The device composite with 6 wt % WS2 NPs showed the best storage features. The OFF/ON1/ON2 current ratio was 1: 1.11 × 101: 2.03 × 104, and the threshold voltage Vth1/Vth2 was −0.60 V/–1.05 V. The device is steady for 12,000 s in three states–high-resistance state (HRS), intermediate state (IRS), and low-resistance state (LRS). After reading 3500 times, the switch-state current displayed no obvious attenuation. This work shows that the polymer and its composites have broad prospects in next-generation nonvolatile storage.
研究领域:
材料科学
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电子工程
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2016
·Vol. 42
·期 7
·3947-3954
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IF 3.205
Jialei Jin,Yuanzhi Zhu,Yizhe Liu,Yang Li,Wenchao Peng,Guoliang Zhang,Fengbao Zhang,Xiaobin Fan
Producing hydrogen through hydrogen evolution reaction by electrolyzing water is a great alternative to solve the energy crisis and air pollution. Earth abundant transition-metal phosphides, especially CoP , have emerged as promising hydrogen evolution reaction catalysts for recent years. Nowadays, attention is focused on combining CoP with other materials to improve its catalytic activity . Herein, in order to get better hydrogen evolution reaction catalyst, we combined CoP nanoparticles with WS 2 nanosheets. Different CoP to WS 2 mass ratios were set to find the best catalytic activity. CoP/WS 2 composites were prepared through a simple ultrasound induced mixing method. And all the CoP/WS 2 composites have enhanced hydrogen evolution reaction catalytic activity than pure CoP nanoparticles and WS 2 nanosheets. Especially, the optimized CoP/WS 2 composite has the lowest onset overpotential of 50 mV, the largest current density of 78 mA/cm 2 at the overpotential of 300 mV, and the smallest Tafel slope of 64.63 mV/decade, indicating excellent hydrogen evolution reaction catalytic activity.
研究领域:
材料科学
·
电化学
·
纳米催化
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能源材料
·
无机功能材料
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Fanqing Meng,Wei Ma,Chunying Duan,Xin Liu,Zhen Chen,Moyan Wang,Jian Gao,Zhe Zhang
Two dimensional transition metal dichalcogenides as potential catalysts to solve energy and environmental crises have caused significant research interests in recent years. In this work, edge-selectively Fe@3D-WS 2 nanoflowers with the abundant single-layer were efficiently prepared by dry ball milling for levofloxacin (LEVO) elimination. Together with the advantages of the single-layer active edges and the stretch of W S bond, the as-prepared Fe@3D-WS 2 showed the ultra-high degradation efficiency for LEVO under ball-milling condition. This high degradation activity was demonstrated to be originated from piezo-catalysis, rather than adsorption or thermocatalysis. In addition, the Fe@3D-WS 2 also showed an ultra-high reusability during the cyclic tests, which is due to its special “self-renewing” behavior under ball milling condition. The degradation efficiency of the Fe@3D-WS 2 still reached ˜ 99% after ten cyclic tests. Both oxygen radicals ( 1 O 2 , O 2 ·− ) and ·OH radicals were generated and took part in the LEVO degradation, while oxygen radicals were more contributed to the LEVO degradation. The present work not only provides an important insight for designing efficient catalysts, but also extends the possible application areas of ball milling technique.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Xiao Shang,Kai-Li Yan,Zi-Zhang Liu,Shan-Shan Lu,Bin Dong,Jing-Qi Chi,Xiao Li,Yan-Ru Liu,Yong-Ming Chai,Chen-Guang Liu
Oxidized carbon fiber (oCF) as support successfully realizes the vertical growth of uniform WS 2 nanosheets arrays for efficient hydrogen evolution reaction (HER) via a facile hydrothermal process. Thanks to oxygen functional groups on oCF, vertical WS 2 nanosheets structures have grown more easily on oCF, which can provide better dispersion, short charge transfer distance and more exposed active sites for HER in comparison with bulk WS 2 and WS 2 nanosheets on bare carbon fiber (CF) fabricated at the same condition. The electrochemical measurements confirmed that WS 2 /oCF possesses better HER activity than bulk WS 2 and WS 2 /CF. Especially, the 10-h stability with unchanged vertical WS 2 nanosheets morphology further demonstrate the positive effect of oxygen functional groups on the enhanced vertical structure and close combination between WS 2 and oCF. It may offer a facile way to realize more exposed active sites from stable electrocatalyst hybrids of transition metal sulfides by surface oxidization of carbon supports.
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
DESALINATION
·
2023
·
IF 9.9
Shasha Zhang,Rongli Fang,Le Zhang,Shunjiang Huang,Yanshuang Zhao,Yue Wang
Two-dimensional (2D) layer material MXene (Ti 3 C 2 T x ) is a promising electrode material in capacitive deionization (CDI) because of its advantages of large capacitance, high conductivity and abundant active sites. However, MXene nanosheets have a large number of metastable metal atoms, which are easy to react with dissolved oxygen and form metal oxides , resulting in structural instability and attenuation of electrochemical performance of MXene. Moreover, the inherent defects of MXene layered structure that are easy to stack, seriously limiting its application in CDI. In this paper, MXene fully coated by WS 2 antioxidant film with mesoporous structure was designed and successfully prepared by hydrothermal method to form a 3D mutually supported heterostructure , so as to improve the structural stability and CDI performance of MXene. The heterostructure performs abundant mesoporous, excellent electrical conductivity , good hydrophilicity and excellent cyclic stability. Therefore, the WS 2 @MXene composite demonstrates high specific capacitance (217.0 F g −1 ) and retention rate of 90.51 % after 1000 GCD cycles. The hybrid AC//WS 2 @MXene cell composed of AC anode and WS 2 @MXene cathode shows excellent desalination capacity (39.1 mg g −1 ). The retention rate of the cell is still 94.9 % after 40 desalting cycles, which is better than that of AC//MXene cell (84.4 %).
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
·
2019
·
IF 2.705
Jiang-Tao Wang,Wei Zhang,Wan-Bi Wang,Yong-Juan Wu,Ling Zhou,Feng Cao
Background Tungsten disulfide (WS 2 ), which enjoyed a good potential to be a promising clinical theranostic agent for cancer treatment, is still subject to the tedious synthesis procedure. Methods Here, we reported a one-pot ‘bottom-up’ hydrothermal strategy for the fabrication of PEGylated WS 2 nanoparticles (NPs). The WS 2 -PEG nanoparticles were characterized systematically. The CT imaging and photothermal therapy against tumor as well as biosafety in vitro and in vivo were also investigated. Results The obtained WS 2 -PEG NPs enjoyed obvious merits of good solubility and favorable photothermal performance. WS 2 -PEG NPs exhibited desirable photothermal ablation ability against cancer cells and cancer cell-bearing mice in vitro and in vivo. MTT assay and histological analysis demonstrated the low cytotoxicity and biotoxicity of WS 2 -PEG NPs, providing a valid biosafety guarantee for the coming biomedical applications. In addition, thanks to the obvious X-ray attenuation of W atom, the WS 2 -PEG NPs can also be served as a favorable contrast agent for CT imaging of tumors. Conclusion WS 2 -PEG NPs has enjoyed a good potential to be a promising clinical CT-guided photothermal therapeutic agent against cancers.
研究领域:
肿瘤学
·
材料科学
·
医学影像学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER COMPOSITES
·
2024
·
IF 4.8
Dingyuan Zhao,Sisi Liu,Jun He,Ziheng Zhao,Shuohui Yin
The carbon nanotubes (CNTs) were chemically grafted onto carbon fibers (CFs) to prepare a CNTs-CF multiscale reinforcement. The tungsten disulfide/polyamide-imide (WS 2 /PAI) composite coating, with PAI as the binder and WS 2 as the lubricant filler, was prepared. The enhancement mechanism of CNTs-CF on the high-temperature tribological performance of WS 2 /PAI composite coating was analyzed. The addition of CNTs-CF was found to increase the temperature of the 10% mass loss of PAI by 14.2°C, indicating its ability to improve the thermal stability of the coating. The hardness of the CNTs-CF-modified WS 2 /PAI composite coating was measured to be 17.9% higher than that of the WS 2 /PAI substrate. The incorporation of CNTs-CF significantly improved the tribological performance of the WS 2 /PAI composite coating. Particularly at 200°C, the friction coefficient and wear rate of CNTs-CF modified WS 2 /PAI composite coating were only 0.095 and 8.92 × 10 −5 mm 3 /(N·m), respectively, which decreased by about 70.3% and 62.2% compared to the WS 2 /PAI substrate. Further analysis revealed that CNTs-CF is firmly embedded within the WS 2 /PAI composite coating through the synergistic mechanism of mechanical interlocking and molecular adsorption. Furthermore, CNTs-CF formed a stable lubricating film, ensuring the excellent friction and wear performance of the coating. Highlights The CNTs-CF can mitigate the thermal degradation of PAI. The high-temperature wear resistance of the coating was noticeably improved. The problem of CF easily detaching from the coating was resolved. The main components of the transfer film were analyzed.
研究领域:
材料科学
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2019
·
IF 5.589
Shuai Fu,Xianming Liu,Yunhui Yan,Li Li,Haiping Liu,Fengying Zhao,Jianguo Zhou
Herein, an efficient broad-spectrum WS 2 /BiOBr heterostructure with ultrathin nanosheet was successfully prepared by one-pot hydrothermal route. The self-assembled flower-like WS 2 /BiOBr nanostructure was formed by few-layer WS 2 and BiOBr nanosheets. The optimized heterojunction presented broad-spectrum high-efficiency photocatalytic activity towards the removal of various pollutants under visible-light irradiation, including organic dyes, antibiotics and phenols. This efficiency was linked to high light harvesting combined with effective charge separation/transfer. Meanwhile, the degradation efficiencies varied with nature of the pollutant decreased in the following order: LR5B (99%) > MNZ (97%) > TC (92%) > OTC (92%) > RhB (90%) > CIP (83%) > MB (78%) > MO (62%) > bisphenol (42%) > phenol (40%). The photocatalytic process of ciprofloxacin was explored, and the results indicated that high ciprofloxacin concentrations, low pH values and elevated concentrations of ions (PO 4 3− , HPO 4 2‐ , H 2 PO 4 − , and Cu 2+ ) restrained the photocatalytic performances. Trapping experiments and ESR revealed the significant contribution of holes (h + ) in the mechanism, where both superoxide radicals ( O 2 − ) and hydroxyl radicals ( OH) acted as assistants. Overall, this work could offer a new protocol for the design of highly efficient heterostructure photocatalysts for environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 28
·9804-9810
·
IF 4.174
Guoteng Zhang,Zaitao Hao,Jie Yin,Chen Wang,Jinghao Zhang,Zhiyu Zhao,Denghu Wei,Huawei Zhou,Zhongcheng Li
The control of surface elements and nanostructures is one of the effective ways to design and synthesize high performance catalysts. Herein, we, for the first time, prepare FeS2 crystal lattices on WS2 nanosheets (FeS2 CL@WS2 NS) by solvothermal methods for the oxygen evolution reaction (OER). The FeS2 CLs effectively prevent the oxidation and aggregation of WS2 nanosheets and increase the electrochemically active surface area. The abundant surface defect in the FeS2 CL@WS2 NS electrocatalyst reduces the stress between the crystal lattices of FeS2 and that of WS2. The overpotential (260 mV) of the FeS2 CL@WS2 NS electrocatalyst for the OER at a current density of 10 mA cm−2 is superior to those of WS2 NS/Ni foam (310 mV) and IrO2/Ni foam (300 mV) in 1.0 M KOH solution. An electrochemical–kinetic study shows that the Tafel slope of 54 mV per decade for the FeS2 CL@WS2 NS electrocatalyst is lower than those of WS2 NS (102 mV per decade) and IrO2/Ni foam (77 mV per decade). In addition, the charge transport resistor (2.3 Ω) of the FeS2 CL@WS2 NS electrocatalyst for the OER is smaller than that of WS2 NS. These faster kinetic properties, in turn, explain the high catalytic activity of the FeS2 CL@WS2 NS electrocatalyst for the OER. The XPS and HRTEM results of the post stability sample confirm that Fe2+ and W4+ are oxidized after durability measurement. Thus, we think that the FeS2 CL@WS2 NS electrocatalyst is a promising candidate for efficient, low-cost, and stable non-noble-metal-based OER electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）