Materials Today Energy
·
2024
·
IF 9
K.S. Chandrakantha,Z. Zuo,B.N. Chandrashekar,A. Amini,K.S. Rangappa,S. Srikantaswamy,C. Cheng
A composite catalyst, zinc-doped laser-reduced graphene oxide (LrGO), is synthesized with highly dispersed molybdenum disulfide (MoS 2 ) nanolayers using laser exfoliation followed by a hydrothermal process. The resultant LrGO–ZnO/1T–2H MoS 2 (GZM3) catalyst exhibits enhanced hydrogen evolution reaction (HER) catalytic performance and improved stability. It achieves small overpotentials of 94 and 191.5 mV at a current density of 10 mA cm −2 , under acidic and alkaline conditions, respectively. This superior catalytic activity is attributed to the high electrical conductivity and large electrochemical surface area of graphene, along with efficient charge transfer facilitated by Zn ions between LrGO–ZnO and 1T–2H MoS 2 .
研究领域:
材料科学
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催化化学
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2024
·
IF 6.1
Ao Xu,Yan Liu,Jiahui Wang,Yijing Wang,Fuyi Jiang,Yanli Zhou
Limited by the poor electronic conductivity and strong interaction between Mg2+ and MoS2, the 2H phase of MoS2 as the cathode materials exhibits a low capacity along with poor rate capability. How to adopt the structure engineering to largely boost the Mg2+ diffusion kinetics and enhance the reaction activity are the current tasks that need to be addressed. Herein, the cation doping strategy is adopted to elaborately design the defective Cu-doped metallic MoS2 nanosheets (Cu-MoS2) via a hydrothermal process. The Cu2+ doping widens the layer distance, induces the formation of metallic 1T phase of MoS2, and ameliorates the structural stability. Thus, the Mg2+ ions diffusion kinetics and the electronic conductivity of Cu-MoS2 are largely boosted. Meanwhile, the MgCl+ in the electrolyte can decrease the reaction energy barrier, and therefore fasten the electrochemical reaction. Therefore, the optimized Cu-MoS2 as the cathode materials toward magnesium ion batteries exerts remarkable magnesium storage properties, evidently superior to the pure MoS2. When cycled at 0.1 A g-1 over 100 cycles, the discharge capacity can reach as high as 369.5 mAh g-1. Even cycled at a high rate of 1 A g-1, the Cu-MoS2 maintains a specific capacity of 267.3 mAh g-1 over 200 long cycles. The related kinetics tests confirm its rapid reaction kinetics and pseudocapacitance dominated charge storage process. The ex-situ XPS and HRTEM data largely verify the conversion reaction mechanism of Cu-MoS2 during cycling. This work provides guidelines for the long-term development of MoS2 in the field of magnesium ion batteries.
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
CATALYSIS LETTERS
·
2021
·Vol. 152
·期 1
·263-275
·
IF 3.186
Wei Jian,Huang He,Luo Qinglong,Liu Na,Wang Xueying,Wang Xuefeng,Zhong Mei,Huang Xueli
Few layer (< 5 layers) MoS 2 mixed with a 1T phase has the characteristics of a large specific surface area and an improved active site distribution. Therefore, it has been increasingly study for the catalytic hydrodesulfurization of polycyclic compounds. In this paper, few-layer MoS 2 with a high proportion of the 1T phase is synthesized by a one-step solvothermal method using a green non-toxic ethanol/water solvent. Results show that few-layer MoS 2 (3–5 layers) with a 1T phase up to 48% can be synthesized in a 50% ethanol solvent. This MoS 2 is used to catalyse the hydrodesulfurization reaction of dibenzothiophene, and the target product conversion rate reaches 84.2%. Among them, biphenyl accounts for 70.2%, phenylcyclohexane accounts for 13.9%, and bicyclohexane accounts for 0.4%. According to the Hansen solubility parameter (HSP) distance Ra, the effects of solvents on the structure and morphology of MoS 2 and the conversion of dibenzothiophene hydrodesulfurization are determined. This work is significant for the synchronous synthetic exfoliation of MoS 2 with a controllable number of layers, a higher ratio of the 1T phase and good catalytic HDS of polycyclic compounds. Graphic Abstract Few layers and high proportion of 1T phase MoS 2 by solvothermal synthesis for catalytic hydrodesulfurization of dibenzothiophene.
研究领域:
材料科学
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催化化学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
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
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DOI
高影响因子
LANGMUIR
·
2026
·
IF 4.4
Zhenyu Wen,Wenjie Zhu,Huanhuan Sun,Yongxue Chen,Yuling Yang,Wutao Yang,Yanping Song,Wei Xie
Flexible and application-oriented surface-enhanced Raman spectroscopy (SERS) substrates are in high demand for trace-level molecular detection in complex environmental matrices. Herein, we report the development of a flexible hybrid SERS substrate supported on polydimethylsiloxane (PDMS), integrating phase-engineered 1T/2H-MoS2 nanoclusters decorated with Au nanoparticles (denoted as PDMS@1T/2H-MoS2@Au). Benefiting from the synergistic coupling between localized surface plasmon resonance (LSPR) of Au nanoparticles and charge-transfer-induced chemical enhancement from 1T/2H mixed-phase MoS2, the as-fabricated substrate exhibits strong and tunable SERS responses under multiwavelength excitation. Systematic SERS performance evaluations demonstrate that the substrate achieves high sensitivity with a detection limit down to 10–10 M for methylene blue (MB), excellent signal uniformity with a relative standard deviation (RSD) of 6.57%, and long-term stability with negligible signal degradation over 2 months, outperforming most flexible SERS substrates. Notably, multivariate analysis based on principal component analysis (PCA) reveals selective signal amplification toward MB in multicomponent dye systems, where the first principal component shows a strong correlation with the Raman fingerprint of MB. After spectral normalization, the PCA score plots further confirm the reliable molecular discrimination capability among multiple dye molecules. Importantly, the practical applicability of the flexible PDMS@1T/2H-MoS2@Au substrate is validated by the trace-level detection of the pesticide thiram on real apple surfaces through conformal contact, achieving a detection limit as low as 10–9 M. This work presents an application-focused sensing workflow, from the elucidation of the enhancement mechanism to real-sample analysis, highlighting the great potential of flexible MoS2–Au hybrid SERS substrates for advanced environmental and food safety molecular sensing.
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DOI
PubMed
高影响因子
Science China-Chemistry
·
2022
·Vol. 65
·期 9
·1829-1837
·
IF 10.138
Shi Yue,Zhang Dan,Miao Hongfu,Wu Xueke,Wang Zuochao,Zhan Tianrong,Lai Jianping,Wang Lei
Molybdenum disulfide (MoS 2 ) has become a competitive candidate for efficient and economical hydrogen evolution reaction (HER). Compared with 1T-MoS 2 , 2H-MoS 2 possesses exceptional thermodynamic stability but still suffers from low active site density, poor conductivity, and weak hydrogen bonding in the wide pH range. Herein, 2H-MoS 2 nanoflowers with phosphorus doping, sulfur vacancies and crystalline-amorphous heterojunction were synthesized via phosphorus-assisted rapid calcination method. Benefiting from the cooperative interaction of multiple strategies, the prepared 2H-MoS 2 nanoflowers firstly achieve efficient pH-universal HER at high current densities. Experimental results show that in alkaline, acidic, and neutral media, MoS 2 -P2 requires only 332, 302, and 417 mV to drive the current density of 500 mA cm −2 and obtains 932, 1100, and 472 mA cm −2 at the potential of −0.4 V vs. RHE, respectively. Moreover, MoS 2 -P2 shows excellent stability of low and high current density in the full pH range.
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
MATERIALS RESEARCH BULLETIN
·
2025
·
IF 5.7
Dawei Gao,Haixiang Wang,Jiajun Tang,Qiaoli Lu,Feifei You,Chao Ye,Lili Wang,Jian Qi
Conventional MoS 2 catalysts face challenges, including weak piezoelectric response, reliance on energy-intensive ultrasound, and limited active sites, reducing their efficiency in degrading organic pollutants. In this work, 1T/2H heterostructured MoS 2 nanoflowers were synthesized via an ionic liquid-assisted hydrothermal method, enabling efficient piezocatalytic activation of peroxymonosulfate (PMS) under mild mechanical stirring. The 1T/2H MoS 2 /PMS system rapidly degraded 95.9 % of Rhodamine B in 15 min, with a kinetic rate 4.43 times higher than conventional MoS 2 , and showed excellent cycling stability. This superior performance was due to enhanced piezoelectric polarization at heterointerfaces, which improved charge carrier separation, and the use of low-energy mechanical stirring instead of ultrasound for activation. Optimized interfacial charge transfer pathways also boosted the generation of superoxide anions (•O₂⁻) and singlet oxygen (¹O 2 ). Moreover, immobilizing 1T/2H MoS 2 on conductive carbon cloth enhanced recyclability and operational feasibility, offering a sustainable solution for water treatment technologies.
研究领域:
环境科学
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材料科学
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催化
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纳米技术
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水处理
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Jinxin Chen,Cheng Zhang,Jiani Liu,Lunyan Wang,Ying Gu,Yaguang Yun,Kun Ge
Developing stable, noble-free SERS substrates with high selectivity and reproducibility remains a major analytical challenge. Herein, a novel noble-free substrate of TiO 2 decorated flower-like 2H-MoS 2 (2H-MoS 2 /TiO 2 ) heterostructure was fabricated for sensitive and selective analysis of mercury ion (Hg 2+ ) in environmental water, demonstrating high potential for monitoring real water samples following standard pretreatment. The 2H-MoS 2 /TiO 2 heterostructure can be simply prepared by two-step hydrothermal method, as well as exhibiting high SERS activity with low minimum detectable concentration (1.0 μg/L) and promising enhancement factor (about 10 5 ) for Rhodamine 6G and derivatives. The good Raman enhancement attributes to multiple synergistic effect of high adsorbability of 2H-MoS 2 /TiO 2 , molecular resonance and significant charge transfer effect, which was investigated by experiments and density functional theory simulations. The indirect analytical method for Hg 2+ based on good SERS activity and specificity of R-NH 2 for Hg 2+ was established. The low limit of detection (0.16 μg/L) with linearity of 0.5 μg/L–1.0 mg/L for Hg 2+ can be obtained. The recoveries of Hg 2+ in environmental water is 82.3–106.7 % with low relative standard deviations of 2.1–6.3 %. More than just a high-performance substrate, this work provides a general design strategy for constructing stable and practical noble-free heterojunctions, significantly advancing the development of reliable SERS methodologies for on-site environmental analysis.
研究领域:
材料科学
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分析化学
·
环境监测
·
纳米技术
·
传感器与检测
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124731
·
IF 7.5
Nan Zhang,Menglin Gao,Wenru Cheng,Zhaocun Song,Xichen Yang
The development of efficient and cost-effective electrocatalysts for hydrogen production is crucial for advancing a carbon-neutral circular economy. The hydrogen evolution reaction (HER) performance of MoS 2 in alkaline media is hindered by its sluggish water-dissociation kinetics and inert basal planes. Herein, we report a novel ternary heterostructure, consisting of γ-FeOOH nanosheets and smaller Ni 3 S 2 nanosheets grown on vertical 1 T/2H MoS 2 nanosheets, that exhibits enhanced HER activity. Systematic investigations suggest that the enhanced HER performance is associated with the interfacial interactions among Ni 3 S 2 , γ-FeOOH, and MoS 2 , which involve strain coupling, electronic coupling, and functional synergy. Accordingly, the Ni 3 S 2 /γ-FeOOH/MoS 2 /CC electrode requires overpotentials of only 99.6 and 176.1 mV at 10 and 100 mAcm −2 , respectively. Remarkably, it outperforms commercial Pt/C at current densities exceeding 173.2mA cm −2 and requires an overpotential of only 213.9mV at 300 mA cm −2 , while also exhibiting robust operational stability at high current densities, highlighting its promise for further exploration toward practical alkaline water electrolysis systems. This work provides a promising strategy for designing high-performance, earth-abundant MoS 2 -based HER catalysts for alkaline water electrolysis.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 27
·12670-12677
·
IF 3.3
Weiwen Cao,Xuanyu Yang,Weiji Dai,Bing Wu,Yudong Zhang,Cuijiao Zhao,Yanwei Sui,Saifang Huang
Efficient and robust electrocatalysts towards the oxygen evolution reaction (OER) are highly desirable in electrochemical systems for applications including water splitting and metal-air batteries. Herein, we report the preparation of an amorphous FeCoNiMnCr high-entropy alloy (HEA) on the surface of flower-like 2H-MoS2 (FeCoNiMnCr@MoS2) as a highly efficient electrocatalyst for the OER. The flower-like 2H-MoS2 is prepared on the flexible conductive carbon cloth (MoS2-CC) via a hydrothermal method, and subsequently the amorphous FeCoNiMnCr HEA is loaded on the surface of 2H-MoS2via an electrodeposition method to form FeCoNiMnCr@MoS2-CC electrocatalysts. Owing to the unique microstructure of 2H-MoS2 and abundant active sites of FeCoNiMnCr HEA, the FeCoNiMnCr@MoS2-CC electrocatalysts exhibit significantly improved OER electrocatalytic performances with a low overpotential of 210 mV at a current density of 10 mA cm−2 and a small Tafel slope of 40.3 mV dec−1 in 1.0 M KOH solution. Moreover, it shows excellent stability for OER electrocatalysis with the potential barely increased for at least 50 h. This work sheds light on the development of highly efficient OER electrocatalysts based on HEAs.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Shufang Ren,Runyan Feng,Shounian Cheng,Liqiu Huang,Qingtao Wang,Zhixiang Zheng
In this work, an ultrasensitive electrochemical sensor towards quantitative detection of acetaminophen (AP) based on hybrid of metallic 1 T and semiconductive 2H phase molybdenum disulfide (1 T/2H MoS 2 ) anchored on rGO sensing platform was constructed. The XRD, FESEM, FETEM and XPS analysis indicates that nanoflowers 1 T/2H MoS 2 with walnut-like fold structure were in-situ loaded onto the surface of rGO nanosheets by the hydrothermal approach. The formation of stabilized 1 T MoS 2 is associated with the influence of GO. The electrochemical tests of CV, EIS and DPV show that the hybrid composite MoS 2 /rGO remarkably promoted the detecting performance owing to the increased conductivity of 1 T MoS 2 that can facilitate charge transfer kinetics, the great active sites on both basal and edge of planes of 1 T/2H MoS 2 and the synergic effect of 1 T/2H MoS 2 and rGO. After the test condition optimization, MoS 2 /rGO/GCE sensor has great electrocatalytic activity towards AP with wide linear range of 0.005–300 μM and low limit of detection of 1.7 nM (S/N = 3). Furthermore, the sensor shows excellent stability, repeatability, reproducibility and anti-interference performance. All results proved that the GO-assisted hydrothermal prepared hybrid 1 T/2H MoS 2 /rGO is promising material for electrochemical analysis.
研究领域:
分析化学
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材料科学
·
药物分析
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yanhua Lei,Jie Wang,Bochen Jiang,Hui Liu,Haifeng Lan,Yuliang Zhang,Guanhui Gao
In this study, we present the successful development of a unique photo-Fenton catalyst, 1T-2H MoS 2 @TP/PPy (MTP), achieved through the coating of a copolymer of tea polyphenol (TP) and polypyrrole (PPy) onto the surface of heterophase molybdenum disulfide (1T-2H MoS 2 ). This innovative approach involves the integration of hydrothermal synthesis with copolymerization techniques. Our strategy utilizes nanoflower-like 1T-2H MoS 2 as the foundational framework, which is then enveloped in TP and PPy copolymer. This innovative approach involves the integration of hydrothermal synthesis with copolymerization techniques. Our strategy utilizes nanoflower-like 1T-2H MoS 2 as the foundational framework, which is then enveloped in TP and PPy copolymer. This distinctive architecture demonstrates exceptional catalytic performance owing to the hetero-phase entanglement of 1T-2H MoS 2 , which provides a diverse array of active sites. The coupled structure of TP and iron (TP-Fe 2+ /Fe 3+ ) effectively overcome the limitation associated with the iron source. The incorporation of PPy not only reduces the recombination of photogenerated electron-hole pairs but also enhances the stability of 1T-2H MoS 2 . Remarkably, our experiments on the degradation of methylene blue (MB) and tetracycline (TC) degradation demonstrate that TP-Fe 2+ /Fe 3+ significantly expands the pH applicability range of the MTP composite catalyst. Additionally, we examine several factors, including different catalysts, H 2 O 2 addition, variations in light intensity, solution pH, temperature fluctuations, and the role of active species, to comprehensively understand their impact on the photo-Fenton degradation process. In conclusion, MTP composite exhibits robust catalytic stability and demonstrates a broad pH utilization range in the photo-Fenton oxidation process, highlighting its promising potential for a wide range of applications.
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PubMed
高影响因子
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