Nano Energy
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2023
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IF 17.6
Shule Huang,Gui Wang,Xinmiao Xuan,Moran Qin,Jieming Huang,Lirong Wang,Xiaoming Zhang,Nan Wang,Junwei Zhang,Zhipeng Hou,Xingsen Gao,Zhang Zhang,Junming Liu
Piezoelectricity in 2D transition metal dichalcogenides (TMDs) has gathered significant interest due to their massive exposure of unsaturated edge sites and high piezoelectric modulus. Nevertheless, the piezoelectricity in 1 T′ phase TMDs is inhibited by its center symmetry of space group. Herein, to break the shackles of piezoelectric polarization, we synthesize a piezoelectric material composed of an atomic molybdenum array bound to distorted 1 T′ ReS 2 (MDR). The phase transition from 1 T′ to distorted 1 T′ (D-1 T′) removes the special Peierl's distortion of ReS 2 , breaking its center symmetry and allowing for piezoelectric generation. Remarkably, MDR exhibits a large piezoelectric coefficient ( d 33 ) value of 15.45 pm/V, which is an order of magnitude higher than those reported in other TMDs. Combining with excellent piezocatalytic activity, a 0D/3D di-piezoelectric porous electret featuring an enhanced quantum confinement piezoelectric effect based on the MDR quantum dots (QDs) and inverse opal g-C 3 N 4 (IOCN) is demonstrated for high-efficiency piezoelectric catalysis.
研究领域:
材料科学
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纳米技术
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物理化学
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DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 50
·35689-35694
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IF 3.9
Huandi Hou,Ting Wang,Baohuan Wang,Wenting Guo,Xiang Miao,Xin Liang
Co–Mo–S based catalysts have promising applications in both the hydrogen evolution reaction (HER) and hydrodesulfurization (HDS). Herein, Co–Mo–S catalyst and Co–Mo–S catalyst with and without NaBH4 modification have been successfully synthesized by a simple hydrothermal synthesis method. Co–Mo–S catalysts with NaBH4 modification show better catalytic activity towards both HDS and the HER. The phase purity, morphology, crystal structures and electron valence distribution of the catalysts with and without NaBH4 modification were studied by experimental characterizations and theoretical calculations. The catalysts without NaBH4 modification are mostly 2H-MoS2, while the catalysts without NaBH4 modification have 1T-MoS2, and 1T-MoS2 is exposed to more active sites, which will be conducive to the results of HDS performance of the catalyst. DFT calculations investigated the required activation energies of 1T-MoS2 and 2H-MoS2 for HDS and HER, respectively. The activation energy required for both HDS and H2 generation of 1T-MoS2 is significantly lower than that for the 2H-MoS2 structure.
研究领域:
催化化学
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材料科学
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理论计算
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Zhiwei Wang,Xiang Zhao,Fangzhen Hong,Hao Wang,Heng Lei,Zhiming Chou,Jiandong Zheng
The development of room-temperature (RT) formaldehyde sensors is significant for indoor air quality monitoring. In this contribution, titanium (Ti)-incorporated 1T/2H molybdenum disulfide (MoS2) phase heterostructures were prepared via a facile hydrothermal method. Compared with 1T/2H MoS2, the as-prepared 1T/2H Mo1–xTixS2 nanosheets showed a boosted RT formaldehyde sensing performance, which was attributed to the enhanced gas adsorption and charge transfer processes induced by Ti incorporation and could be regulated by tuning the Mo/Ti ratio in Mo1–xTixS2. In addition, the Ti-incorporated phase heterostructures with an optimized 1T concentration showed further improved gas-sensing properties compared to the highly metallic or semiconducting nanosheets with the same chemical composition, which exhibited an obvious response of 0.035% to 1 ppm formaldehyde with an excellent limit of detection as low as 39 ppb, good repeatability, and short response and recovery times. Moreover, flexible gas sensors based on the optimized nanosheets showed well-maintained responses under moderately bent conditions. Our findings demonstrate that the creation of phase heterostructures with tunable compositions and phases may provide more opportunities to tailor their sensing properties.
研究领域:
材料科学
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环境监测
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传感器技术
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Shan Li,Longlong Zhang,Bin Xu,Weihua Qin,Mengdan Wang,Bingli Pan,Hongyu Liu,Honggang Wang
Nanoparticles are of great significance to enhance tribological performances and can be employed as effective lubricant additives. 1T-MoS 2 has been widely applied in many fields. However, it is rarely studied in lubrication application. In this study, a novel core-shell lubricant additive was prepared by combining CuNi-MOF and 1T-MoS 2 via a facile hydrothermal method. The as-prepared CuNi-MOF@1T-MoS 2 exhibited a flower-like structure. Both experimental and theoretical calculation results showed the interlamellar interactions between the layered 1T-MoS 2 and CuNi-MOF sheets. Tribological properties of PEG200 containing CuNi-MOF@1T-MoS 2 were systematically investigated by a four-ball test machine. In comparison with PEG200, the friction coefficient and wear scar diameter were remarkably reduced by 56.8 % and 34.0 %, respectively. Therefore, the combination of 1T-MoS 2 and CuNi-MOF presents a promising candidate for enhancing the tribological properties of PEG200.
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高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Tengfei Wang,Qing Pang,Boyu Liu,Hongyu Wang
In recent years, molybdenum diselenide (MoSe2) nanomaterials have been proven to be promising electromagnetic wave (EMW) absorbers, attributed to the formation of a heterogeneous interface between the 2H semiconductor phase and the 1T metal phase during its preparation. However, the difficulty in precisely controlling the two-phase ratio and the complexity of the process hinder its further development. In this work, we constructed a simple phase engineering strategy based on the regulation of reducing agent concentration, achieving a regulation of the 1T phase proportion in defective 1T/2H-MoSe2 nanomaterials (ranging from 67.91 to 41.45%) by accurately adjusting the amount of NaBH4 added. The findings indicate that the material exhibits excellent microwave absorption performance when the 1T phase proportion reaches 53.55% (1T/2H-MoSe2-2), demonstrating a minimum reflection loss (RLmin) of −40.0 dB, and the effective absorption bandwidth (EAB) covers 6.08 GHz (11.92–18.0 GHz) when the thickness is 2.6 mm. The enhancement in performance results from a synergistic balance mechanism established by the abundant 1T-2H heterogeneous interface, which induces interfacial polarization loss, along with a moderately enhanced conductive loss in the 1T/2H-MoSe2-2 nanomaterial. Furthermore, radar cross-section (RCS) simulation results confirm the dramatic dissipation ability of absorbers for EMW in practical applications. This strategy paves the way for designs of interfaces and the control of the performance of absorbing nanomaterials based on transition-metal dichalcogenides (TMDs).
研究领域:
材料科学
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电磁学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 5
·期 3
·1035-1042
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IF 8.262
Ming Liu,Zhaojie Wang,Junxue Liu,Guijuan Wei,Jiao Du,Yanpeng Li,Changhua An,Jun Zhang
The synthesis of layered transition metal dichalcogenide nanocrystals with excellent properties in energy conversion and storage has been well documented in the past several years. However, due to the metallic character of Te, the realization of the chemical synthesis of uniform well-defined MoTe2 nanostructures still remains a challenge, especially to achieve metastable 1T′-MoTe2. In this work, we have developed a colloidal chemical strategy for the synthesis of ultrathin 1T′-MoTe2 nanosheets. The as-achieved sample was characterized by a layered-expanded feature with an interlayer distance of 0.723 nm and rich defects. The shapes of 1T′-MoTe2 can be controlled by varying Mo precursors and the reaction atmosphere, where CO plays an essential role in determining the nanosheet feature. Interestingly, the optimized few-layer 1T′-MoTe2 nanosheets can be used as an efficient supercapacitor electrode with specific capacitances of 1393 F g−1 and 714 F g−1 at current densities of 1 A g−1 and 100 A g−1, respectively. An asymmetric 1T′-MoTe2//activated carbon supercapacitor exhibits a maximum specific capacitance of 158.9 F g−1 with an energy density up to 56.4 W h kg−1. To the best of our knowledge, it is the first time that ultrathin MoTe2 nanosheets have been used as ideal electrode materials for supercapacitors. The present work highlights a facile synthetic strategy to realize uniform transition metal telluride nanostructures for enhancing their electrochemical performances.
研究领域:
材料科学
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电化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
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2021
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IF 9.229
Cheng Lin,Lianfu Jiang,Dawei Hu,Yiqun Li,Bo Cai,Jing Li,Yu Gu,Luyang Wang,Kan Zhang,Haibo Zeng
Although research progress on mimicking natural photosynthesis for solar-to-fuel conversion has been continuously made, exploring broadband spectral-responsive materials with suitable band positions and high stability still remains a huge challenge. Herein, we, for the first time, report novel AsP nanosheets (NSs) with P-type semiconducting property and enough negative conduction band, which can work as a stable near-infrared (NIR) region-responsive electron donor for water reductive hydrogen (H2) production. To mimic photosystem I, Au nanorods (NRs) act as electron transport media, which are also responsible for the enhanced electric field nearby, and 1T-MoS2 NSs as a hydrogen evolution catalyst are orderly coupled with AsP NSs with a sheet-rod-sheet structure by electrostatic self-assembly. The cascaded band level alignment enables unidirectional electron flow from AsP to Au and then to MoS2, and the optimum H2 production rate of the MoS2-Au-AsP ternary heterojunction reaches 125.52 μmol g–1 h–1 with good stability even after being stored for several months under light irradiation with a wavelength longer than 700 nm. This work provides a platform that is energetically tailored to drive a solar broad-spectrum fuel generation, including CO2 reduction and N2 fixation.
研究领域:
材料科学
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能源化学
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光催化
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Hankui Sang,Congming Tang,Kai Ma,Xinli Li
The scarcity of fresh water resources necessitates us to develop an efficient technique for sustainable production of clean water from seawater and wastewater. Here, we constructed the 1 T-MoS 2 /PDA (polyaniline) as a photothermal material for purification of seawater and wastewater to produce clean water through interfacial evaporation by virtue of sunlight. 1 T-MoS 2 has a higher evaporation capacity of water than 2 H-MoS 2 , which was selected to prepare 1 T-MoS 2 /PDA composite for photothermal conversion. As expected, 1 T-MoS 2 /PDA composite offers a higher evaporation rate of water than both 1 T-MoS 2 and PDA , which owes to an excellent light absorbance, low light reflectance and good wettability . Under irradiation of 1 sun, the evaporation rate of water over the 1 T-MoS 2 /PDA composite in pure water reached 1.51 kg m −2 h −1 , and the photothermal conversion efficiency reached 92%. Encouragingly, 1 T-MoS 2 /PDA composite can be well used to treat real seawater and various wastewater such as organic dye solution and heavy metal ion solution, in which the evaporation rate of water is close to pure water, and the quality of water is better than the standard of drinking water established by the World Health Organization (WHO). Besides, 1 T-MoS 2 /PDA composite still maintain an excellent evaporation performance after treatment of acidic solution and alkaline solution, indicating an excellent durability. This work provides a feasible solution for producing clean water by solar-driven interfacial evaporation from seawater and wastewater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Nano Futures
·
2022
·Vol. 6
·期 2
·025001
·
IF 4.07
Yu-Ting Wang,Ze-Zhi Zhang,Ming-Xue Li
Two-dimensional transition metal dichalcogenides are regarded as the ideal hosts for zinc-ions. Herein, a facile hydrothermal method is proposed to fabricate the metallic phase (1T phase) MoS2/multi-walled carbon nanotube (MWCNT) hybrids serving as the cathode materials for zinc-ion batteries (ZIBs). By virtue of the exertion of phase engineering and the synergy between the 1T MoS2 nanosheets and MWCNT framework, the transfer kinetics of zinc-ions of the prepared hybrid are remarkably accelerated, leading to boosted electrochemical properties at both room temperature and low temperatures. The hybrid electrode delivers a high reversible capacity of 161.5 mAh g−1 after 100 cycles at 0.1 A g−1, and good cycling stability with a desired capacity retention of 84.6% over 500 cycles at 1 A g−1. Furthermore, its boosted capability of zinc-ion storage in a low-temperature atmosphere is revealed. This work not only provides an effective way to squeeze the values of phase engineering of MoS2 in ZIBs, but also reveals the great potential of MoS2-based composites in low-temperature energy storage devices.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
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2024
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IF 2.4
Nazeer Sana,Han Jingwei,Qi Junjie
Due to the fact that fossil fuels are limited and the world’s energy demand is rising, economic catalysts with exceptional stability and efficiency must be produced right now. MoS 2 ’s successfully increased catalytic activity by interfacial coupling and phase engineering. The 1T/2H-MoS 2 /Ni 3 S 2 composite was effectively created in this study by adding Ni 3 S 2 material on top of 1T/2H-MoS 2 (Mo: S = 1:4). The effects of varying concentrations of Ni 3 S 2 on hydrogen evaluation reaction characteristics are examined using the hydrothermal technique. The composite sample with an appropriate amount of Ni 3 S 2 has the best hydrogen evolution performance when compared to samples with other amounts of Ni 3 S 2 . The sample’s overpotential at 1 M KOH is 124 mV at 10 mAcm −2 , and its Tafel slope is 138.0 mVdec −1 . In addition, the sample exhibits good air stability and hydrogen evolution stability. Also, to accelerate the kinetics of hydrogen evolution and encourage H 2 O dissociation in an alkaline environment, Ni 3 S 2 efficiently stimulates MoS 2 ’s inert base surface, creates a rich coupling boundary, and greatly enhances the performance of electrocatalytic hydrogen evolution. Graphical abstract
研究领域:
材料科学
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电化学
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催化作用
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DOI
高影响因子
ACS Nano
·
2026
·
IF 17.3
Xuwu Xiao,Cheng Cheng,Cuizhi Chen,Lituo Zheng,Dong Wei,Mingdeng Wei,Zhensheng Hong
Photobatteries promise a revolutionary approach to both harvesting and storing solar energy; however, their development has been limited by rapid carrier recombination and the absence of interfaces to direct charge flow effectively. Here, we construct an in-plane 1T/2H-MoS2 heterostructure chemically connected onto carbon nanotubes (CNTs) that integrate metallic 1T-MoS2, semiconducting 2H-MoS2, and conductive CNTs into a multi-interface framework. This architecture generates a built-in electric field across the 1T/2H-MoS2 junction and provides continuous directional pathways for rapid electron extraction and transfer. Ultrafast transient absorption spectroscopy identifies long-lived charge-separated states with a prolonged carrier lifetime (τ2 ≈ 731 ps) in the 1T/2H-MoS2 heterostructure, more than double that of 2H-MoS2@CNTs. Meanwhile, Kelvin probe force microscopy reveals a pronounced light-induced potential gradient (∼75 mV), providing direct nanoscale evidence of efficient carrier extraction. These synergistic effects promote efficient charge separation and transport, enabling superior photoassisted lithium-ion storage. The 1T/2H-MoS2@CNTs-based lithium-ion photobattery demonstrates an increased storage capacity from 493.7 to 624.9 mAh g–1 at 0.5 A g–1 under illumination and a maximum photoconversion and storage efficiency of 6.62%, achieving an external voltage-free self-charging process. This study underscores rational multi-interface engineering to effectively integrate light harvesting and electrochemical storage for self-charging energy systems.
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PubMed
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.
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高影响因子
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