INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2023
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IF 4.2
Huangcong Tang,Jiayang Dou,Zhixian He,Jingwen An,Wenhuan Liu,Sheying Dong
Heterostructured catalysts with the potential synergies between the polymetallic sulfides and the construction of 1T-phase MoS2 are a promising alternative and contribute to obtain the enhanced hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) performance. Herein, the porous hybrid nanostructures coupling FeS2 and NiS complexes with 1T/2H phase MoS2 (FeNiSx@MoS2–HZHx) are prepared via a facile one-pot pyrolysis strategy accompanied by hydrazine hydrate (HZH)-induced phase transformation without the assistance of a template. The hybrid nanostructures possessing crystalline–amorphous (c–a) interface need overpotentials of 139 mV to achieve the current density of 10 mA cm–2 (η10) in 0.5 M H2SO4, which have superior kinetics for the HER process with a Tafel slope value of 57.9 mV dec–1. The 24 h continuous HER operated at η10 exhibits negligible deterioration, which has only a decrease of 3 mV at η10 after the 5000 cyclic voltammetry cycle tests, indicating the desirable stability of FeNiSx@MoS2–HZH2. Beyond that, the resultant FeNiSx@MoS2 requires 335 mV at η10. Specifically, the electrochemical and structural characterization prove that the enhanced HER performance is contributed from the incorporation of HZH to form FeS2/MoS2/NiS heterostructures and c–a interface sites coupling with 1T/2H phase MoS2, which provide more exposed active sites benefiting from the larger surface area. The simple and convenient design strategy has certain enlightenment for the development of sustainable energy production.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Yi Wang,Xinyan Xiao,Tingting Ding,Mingli Lu
The transition-metal dichalcogenides (TMDs) with 1T phase structure holds great promise for providing abundant active sites and superior conductivity, while the achievement of highly efficient degradation activity over bare TMDs and TMDs-based photocatalysts is still challenges. In this work, a flower-like mixed 1T-2H phase MoSe 2 was synthesized via a sodium borohydride (NaBH 4 )-assisted solvothermal method, and then was selected as a “charge-transfer-bridge” to fabricate a dual Z-scheme AgI/1T-2H MoSe 2 /Bi 4 O 5 Br 2 composite with a 0D/3D hierarchical structure. The optimal AgI/1T-2H MoSe 2 /Bi 4 O 5 Br 2 composite exhibited the superior photocatalytic activity towards degrading RhB and TC relative to AgI/2H MoSe 2 /Bi 4 O 5 Br 2 and AgI/Bi 4 O 5 Br 2 . The enhancement is attributed to its better light absorption, abundant active sites, and superior charge carrier mobility and separation efficiency, resulted from synergetic effect of 0D/3D structural coupling and energy band matching. Moreover, the important energy band alignments and mixed 1T-2H phase MoSe 2 boosting photocatalytic mechanism of as-prepared AgI/1T-2H MoSe 2 /Bi 4 O 5 Br 2 heterojunction were investigated. This work describes a competitive design and fabrication technique for constructing novel mixed phase TMDs-based Z-scheme heterojunctions to address environmental issues.
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
FUEL
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2022
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IF 8.035
Zhe Bai,Luyao Wang,Hongwei Cao,Xiangwen Zhang,Guozhu Li
Hydrodesulfurization (HDS) is an effective way to reduce sulfur content in oil for the enforcement of more stringent environmental regulations. MoS 2 has been widely used as an effective component for catalyzing HDS, and needs to be extensively studied in depth. Herein, MoS 2 nanoflowers with the symbiosis of 1T-2H phases in the basal planes and coexistence of S and Mo vacancies are prepared via the assembly of many nanosheets by a one-pot solvothermal method. The morphology, crystal phase structure and defects of these 1T-2H MoS 2 samples were well characterized. The 1T/2H ratio and the state of vacancies were effectively tuned by changing the solvothermal conditions. Active and stable 1T-2H mixed MoS 2 nanoflowers with high content of 1T phase and moderate S and Mo vacancies were obtained by the regulation of oxalic acid in the mixture of ethanol and water. In the HDS of dibenzothiophene at 300 °C and 4 MPa, the optimal catalyst of MoS 2 -water–ethanol-OA exhibited a substrate conversion of 89.3% in 10 h. Moreover, the activity of MoS 2 -water–ethanol-OA was well retained without any decrease in the recycling experiment.
研究领域:
催化
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2020
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IF 6.155
Haiyang Yu,Zhenzhu Wang,Jiangfeng Ni,Liang Li
Molybdenum disulfide (MoS 2 ) is a promising electrode material for sodium-ion batteries as it offers a large capacity through a distinct conversion reaction. However, the electrochemical potential of MoS 2 is often restrained by the poor conductivity as the dominant 2H phase is a semiconductor while the metallic 1T phase is thermodynamically unstable. In this work, we report a hybrid design and material preparation of freestanding nanosheets of MoS 2 composed of both 1T and 2H phases based on mild hydrothermal reaction . The introduction of the metallic 1T-MoS 2 phase into 2H-MoS 2 and their intimate hybridization enable a significant improvement in electronic conductivity, while the freestanding architecture avoids possible electrochemical aggregation. When used as electrodes for sodium storage, such a hybrid MoS 2 affords a high capacity of ∼500 mA h g −1 at 0.5 A g −1 after 300 cycles, and retains capacity of ∼200 mA h g −1 at a high current rate of 4 A g −1 , thus demonstrating their potential in high-performance battery applications.
研究领域:
材料科学
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电化学
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纳米科技
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能源存储
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无机化学
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Zhenyu Wen,Wenjie Zhu,Yongxue Chen,Huanhuan Sun,Lin Zhu,Yuling Yang,Yanping Song,Lei Chen,Jiajun Dong,Bingbing Liu
Surface-enhanced Raman spectroscopy (SERS) holds immense promise for molecular detection, yet the quest for high-performance, plasmon-free substrates remains active. This work pioneers the rational design and engineering of phase-tunable MoS2 nanoclusters─metallic (1T), semiconductor (2H), and, critically, hybrid metal/semiconductor (1T/2H) phases as a novel class of SERS platforms. We demonstrate this exceptional capability for ultrasensitive detection of environmentally hazardous dyes (e.g., rhodamine B, crystal violet, and methylene blue). Remarkably, the optimized 1T/2H-MoS2 substrate achieves an enhancement factor of 1.02 × 109, which ranks among the higher values for SERS substrates derived from semiconductors. Crucially, time-resolved transient photoluminescence decay spectroscopy reveals a dramatic 52% decrease in average exciton lifetime (from 3.88 to 1.86 ns) for RhB adsorbed on 1T/2H-MoS2 substrates. This profound decrease provides direct evidence for highly efficient interfacial charge transfer, predominantly driven by the built-in electric field unique to the engineered phase junction. Furthermore, by leveraging the distinct Raman signatures enabled by this heterophase substrate, we achieve the multiplex detection of all five environmental nucleobases (adenine, guanine, cytosine, thymine, and uracil) in both individual and mixed solutions. This work not only delivers fundamental mechanistic insights into charge transfer-mediated SERS but also provides a practical platform with broad implications for environmental monitoring, biomedical diagnostics, and analytical chemistry.
研究领域:
分析化学
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环境科学
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纳米技术
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光谱学
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材料科学
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生物医学诊断
✓ 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）