APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Ruijing Wang,Qiang Shao,Qin Yuan,Peng Sun,Rongrong Nie,Xuefeng Wang
The modified MoS 2 -based material, with a higher conductivity and rich active sites, is promising one of a variety of nonprecious-metal electrocatalysts for hydrogen evolution reaction (HER). Here, the bulk MoS 2 is exfoliated to form small-size MoS 2 clusters by pulse laser, which are diluted in solid sulfur and further to form porous film. The 1T phase MoS 2 ratio in the prepared film was modulated by adding the different content of sulfur into MoS 2 target. Besides, this addition also has an effect on the pore structure of films. Finally, the obtained high-content 1T phase MoS 2 film provides the highly metallic conductivity and more active sites, which results in the more enhanced HER catalytic activity with a lower Tafel slope of 38 mV dec −1 , a smaller overpotential of 151 mV at 10 mA cm −2 , compared with the pure MoS 2 film.
研究领域:
材料科学
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电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2018
·Vol. 11
·期 23
·4060-4070
·
IF 7.411
Huimin Zhou,Xin Xia,Pengfei Lv,Jin Zhang,Xuebin Hou,Min Zhao,Kelong Ao,Di Wang,Keyu Lu,Hui Qiao,Malgorzata Zimniewska,Qufu Wei
Graphical Better anode by design : A designed anode structure combining the metallic conductivity of 1T-MoS 2 with interconnected TiO 2 /MoO 3 grains is beneficial for fast charge-transfer reactions and reduced transmission losses. Moreover, a flexible carbon framework buffers swollen lithium compounds, such as Li x MoO 3 and Li x MoS 2 , and supports the shrinking delithiated products, with potential for achieving high capacity stability in both Li- and Na-ion batteries. Integrating layered nanostructured MoS 2 with a structurally stable TiO 2 backbone to construct reciprocal MoS 2 /TiO 2 -based nanocomposites is an effective strategy. C@TiO 2 /MoO 3 composite nanofibers doped with 1T-phase MoS 2 nanograins were fabricated by partially sulfurizing MoO x /TiO 2 precursors. By controlling a suitable preoxidation temperature before severe thermolysis of polyvinylpyrrolidone (PVP), the MoO x /TiO 2 precursors formed a polymer-embedded array through coordination of the Mo source and pyrrolidyl groups of PVP. Sulfidation under water/solvent hydrothermal conditions led to partial formation of metallic 1T-phase MoS 2 from the MoO x precursor with preoxidation at 200 °C. After carbonization, the TiO 2 /MoO 3 /MoS 2 nanograins were encapsulated in a carbon backbone in a vertical pattern, providing both chemical contact for confined electron transport and sufficient space to adapt to volume changes. The obtained carbon-based platform not only has the advantages of an integral structure, but also exhibited ultrastable specific capacities of 540 and 251 mAh g −1 for Li-ion batteries and Na-ion batteries, respectively, after 100 cycles.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2021
·Vol. 9
·期 38
·8109-8120
·
IF 6.331
Hao Liu,Haolin Chen,Xiaoying Liu,Luoqi Mo,Chao Chen,Zhouyi Guo,Zhiming Liu
1T-phase niobium telluride (NbTe2) nanosheets are becoming increasingly important in emerging fields, such as spintronics, sensors and magneto-optoelectronics, due to their excellent physical and chemical properties. However, exploration on their biomedical applications are limited. Herein, ultrathin 1T-phase NbTe2 single-crystalline nanosheets with excellent photothermal performance, high drug-loading rate, near-infrared (NIR) light/acidic pH-triggered drug release, and low toxicity were developed for potentiated photothermal therapy. Importantly, they showed excellent biocompatibility in vivo and in vitro. NbTe2 nanosheets loaded with integrated stress response inhibitors (ISRIB) could achieve chemo-photothermal therapy of tumors through the ATF4–ASNS signaling axis. Ultrathin 1T-phase NbTe2 single-crystalline nanosheets with unique photothermal properties, drug loading rate and safety provide dramatic possibilities in biomedical applications, such as tissue imaging, photothermal therapeutics and pharmaceutics.
研究领域:
生物医学工程
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纳米技术
·
癌症治疗
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-13
·
IF 14.7
Mei Liang,Sun Mingzi,Yang Ruijie,Zhang Yaqin,Zhang Yuefeng,Zhang Zhen,Zheng Long,Chen Ye,Zhang Qinghua,Zhou Jiang,Zhu Ye,Leung Kenneth M. Y.,Zhang Wenjun,Fan Jun,Huang Bolong,Zeng Xiao Cheng,Shin Hyeon Suk,Tang Chuyang Y.,Gu Lin,Voiry Damien,Zeng Zhiyuan
Two-dimensional (2D) materials, as adsorbents, have garnered great attention in removing heavy metal ions (HMIs) from drinking water due to their extensive exposed adsorption sites. Nevertheless, there remains a paucity of experimental research to remarkably unlock their adsorption capabilities and fully elucidate their adsorption mechanisms. In this work, exceptional lead ion (Pb 2+ ) (a common HMI) removal capacity (up to 758 mg g −1 ) is achieved using our synthesized metallic 1T/1T′ phase 2D transition metal dichalcogenide (TMD, including MoS 2 , WS 2 , TaS 2 , and TiS 2 ) nanosheets, which hold tremendous activated S chemisorption sites. The residual Pb 2+ concentration can be reduced from 2 mg L −1 to 2 μg L −1 within 0.5 min, meeting the drinking water standards following World Health Organization guideline (Pb 2+ concentrations <10 μg L −1 ). Atomic-scale characterizations and calculations based on density functional theory unveil that Pb 2+ bond to the top positions of transition metal atoms in a single-atom form through the formation of S-Pb bonds. Point-of-use (POU) devices fabricated by our reported metallic phase MoS 2 nanosheets exhibit treatment capacity of 55 L-water g −1 -adsorbent for feed Pb 2+ concentration of 1 mg L −1 , which is 1-3 orders of magnitude higher than other 2D materials and commercial activated carbon.
研究领域:
材料科学
·
环境科学
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纳米技术
·
水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Zenglong Wu,Wenkai Song,Xiangwei Xu,Jiangnan Yuan,Weiyang Lv,Yuyuan Yao
Applicating co-catalyst into Fenton-like advanced oxidation processes to improve the performance for wastewater remediation has attracted widespread attention. Among them, developing highly active and green heterogeneous catalyst integrating homogeneous ferrous ions and inorganic co-catalyst is a great challenge. Herein, ascorbic acid additive was creatively introduced into the precursor composed of thiourea, sodium molybdate and ferric chloride to synthesize carbon intercalated molybdenum disulfide anchoring iron (C-MoS 2 @Fe) by a simple one-step hydrothermal method. C-MoS 2 @Fe exhibited an amazing apparent first-order constant as high as 0.739 min −1 about 10 times higher than that of the homogeneous Fe 2+ /MoS 2 system for the sulfamethoxazole (SMX) removal and achieved 68.7% removal of TOC in 6 min, which was attribute to the synergistic enhancement of high 1T phase (82.0%) and sulfur vacancies induced by the introduction of ascorbic acid. Notably, the C-MoS 2 @Fe was also capable of efficiently degrading multiple organic contaminants such as pharmaceuticals, phenolic compounds, and organic dyes. Compared with the homogeneous Fe 2+ /PMS system, the C-MoS 2 @Fe/PMS system expanded the effective pH range (2.0 ∼ 9.0) and the ultralow iron ions leaching (0.204 mg L -1 ) avoided the formation of iron containing sludge. The results of electron paramagnetic resonance (EPR), radical quenching and probe experiments indicated that •OH was the main active species with the contribution rate about 60.3%. Furthermore, possible degradation pathways were proposed based on the intermediate products of SMX investigated by LC-MS. This study provides novel insights for the development of highly active and green catalysts for wastewater remediation.
研究领域:
环境科学
·
化学工程
·
材料科学
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
ENERGY
·
2025
·
IF 9.4
Ziyang Zhu,Nan He,Dong Wang,Qicheng Chen,Yingjin Zhang,Bingjian Nie
MoS 2 is considered a highly promising anode material for supercapacitors owing to its distinctive two-dimensional structure. However, its relatively low electrical conductivity restricts its further development and practical application. For the purpose of addressing this issue, this study reports the first synthesis of a CuO@MoS 2 /MXene ternary heterostructure based on hollow CuO. The formation of the built-in electric field, along with the redistribution of local charge, facilitates the transformation of 2H-MoS 2 into highly conductive 1T-MoS 2 . In addition, the three-dimensional crosslinked network structure formed by the highly conductive MXene and MoS 2 layers offers additional storage capacity for electrolyte ions, thereby further enhancing the energy storage density of the material. This negative material exhibits a maximum specific capacitance of 1435.2 F g −1 , which is significantly higher than that of most reported MoS 2 -based negative materials. The synergistic support provided by the porous CuO substrate and the MXene layer effectively inhibits the lamellar aggregation of MoS 2 , thereby achieving a capacitor retention rate of 90.1 % after 5000 charge-discharge cycles. The asymmetric supercapacitor constructed from the material achieves a maximum energy density of 91.4 Wh·kg −1 , demonstrating excellent application potential in various fields. This study addresses the research gap concerning negative electrode materials for high specific capacitance MoS 2 -based supercapacitors and offers a novel approach to further enhancing the energy density of supercapacitors.
研究领域:
材料科学
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纳米技术
·
电化学
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储能技术
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无机化学
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应用物理学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yue Tian,Xiaoyan Liu,Xiaoqing Cao,Dieqing Zhang,Shuning Xiao,Xinru Li,Zaiyuan Le,Xianyang Li,Hexing Li
1T MoS 2 has recently attracted growing interests for energy storage due to the excellent conductivity, expanded layer space and extra exposed active sites. However, its application is still limited due to the complicated synthesis under harsh condition and poor structural stability. Herein, we report a novel MoS 2 /Cu nanowires (NWs) by microwave-assisted self-assembly of ultrathin 1T MoS 2 onto Cu NWs with interconnected conductive network and robust one-dimensional (1D) structure. As anode material for LIBs, 1T MoS 2 /Cu NWs exhibits high capacity and stability owning to the enhanced electron transport and lithium ions intercalation. Meanwhile, the enriched nanovoids supply extended space for buffering the volume change and boosting electrolyte penetration during cycling process. Moreover, Cu doped MoS 2 could also stabilize the 1T phase, leading to the excellent anode durability. It delivers a high reversible capacity of 570.6 mAh g −1 after 250 cycles at a current density of 0.5 A g −1 . Enhanced rate performance is also achieved with excellent capacity retention of 914.6 mAh g −1 at 0.1 A g −1 and 465.2 mAh g −1 at 2 A g −1 , respectively.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能源存储
✓ 已验证
DOI
高影响因子
Carbon Energy
·
2022
·Vol. 5
·期 2
·e255
·
IF 21.556
Yunke Wang,Yige Zhao,Kangli Liu,Shaobin Wang,Neng Li,Guosheng Shao,Feng Wang,Peng Zhang
Sophisticated efficient electrocatalysts are essential to rectifying the shuttle effect and realizing the high performance of flexible lithium-sulfur batteries (LSBs). Phase transformation of MoSe 2 from the 2H phase to the 1T phase has been proven to be a significant method to improve the catalytic activity. However, precisely controllable phase engineering of MoSe 2 has rarely been reported. Herein, by in situ Li ions intercalation in MoSe 2 , a precisely controllable phase evolution from 2H-MoSe 2 to 1T-MoSe 2 was realized. More importantly, the definite functional relationship between cut-off voltage and phase structure was first identified for phase engineering through in situ observation and modulation methods. The sulfur host (CNFs/1T-MoSe 2 ) presents high charge density, strong polysulfides adsorption, and catalytic kinetics. Moreover, Li-S cells based on it display capacity retention of 875.3 mAh g −1 after 500 cycles at 1 C and an areal capacity of 8.71 mAh cm −2 even at a high sulfur loading of 8.47 mg cm −2 . Furthermore, the flexible pouch cell exhibiting decent performance will endow a promising potential in the wearable energy storage field. This study proposes an effective strategy to precisely control the phase structure of MoSe 2 , which may provide the reference to fabricate the highly efficient electrocatalysts for LSBs and other energy systems.
研究领域:
材料科学
·
电化学
·
储能技术
·
纳米技术
·
电池技术
✓ 已验证
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-14
·
IF 15.7
Wang Peng,Zhao Danyang,Zhang Peng,Hui Xiaobin,Zhang Zhiwei,Wang Rutao,Wang Chengxiang,Ge Xiaoli,Liu Xiaojing,Li Yuguang C.,Yin Longwei
The metallic phase MoS 2 (1T-MoS 2 ) supported metal-nanocatalyst is an appealing material system for accelerating the redox kinetics of non-aqueous Li | |O 2 batteries. However, the drawbacks associated with the surface orbital steric effect and the internal electron coupling results in a detrimental effect for the stability of 1T-MoS 2 , especially for the interface charge transfer. This makes it difficult to incorporate guest metal nanoparticles without compromising the 1 T phase support. To circumvent these issues, here we propose a p-block element (In-O) doping strategy to stabilize the 1 T phase MoS 2 by moderating the surface orbital steric effect and strengthening the internal chemical bonding, and thus for the epitaxial Ru nanocatalyst graft on the stabilized 1T-MoS 2 for Li | |O 2 batteries. The experimental and theoretical analyzes indicate that the In-O-MoS 2 @Ru enhances the O 2 dissociation and facilitates the adsorption of LiO 2 intermediates. This effect promotes the growth of weakly crystalline Li 2 O 2 films during oxygen reduction reaction, which can be more easily decomposed during the oxygen evolution reaction, thereby enhancing the bifunctional-catalytic kinetics. When employed at the positive electrode for non-aqueous Li | |O 2 batteries, In-O-MoS 2 @Ru shows an overpotential of 0.37 V and a cycling life of 284 cycles at 200 mA g −1 with a final discharge specific capacity of 1000 mAh g −1 at 25 °C.
研究领域:
材料科学
·
电化学
·
储能技术
·
纳米技术
·
催化
✓ 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）