ChemistrySelect
·
2025
·Vol. 10
·期 8
·e202405489
·
IF 2
Xin Wang,Tao Feng,Si Wu
Graphical This paper reports the one-step synthesis of 1T-MoS₂ nanosheets using a simple hydrothermal method at 140 °C. The highest adsorption abilities for methylene blue and rhodamine b are 605 and 795 mg g⁻¹, respectively. This paper reports on the one-step synthesis of molybdenum disulfide (MoS 2 ) nanosheets with excellent adsorption properties for cationic dyes using a simple hydrothermal method. Compared with 2H-MoS 2 prepared at 220 °C, 1T-MoS 2 prepared at 140 °C showed better adsorption of cationic dyes, with highest adsorption abilities of 605 and 795 mg g⁻¹ for methylene blue and rhodamine b, respectively. The adsorption process follows a pseudo second-order kinetic model, which indicates that the process is mainly controlled by chemisorption. At the same time, the Langmuir isotherm model is more suitable for describing the adsorption process, suggesting a monolayer adsorption on a homogeneous surface of 1T-MoS 2 . Adsorption equilibrium times were observed at 1–6 h in the initial dye concentration range of 100–400 mg/L. The zeta-potential and XPS results suggest that 1T-MoS 2 possesses a negatively charged surface and abundant oxygen-containing functional groups, making it more effective in adsorbing cationic dyes. The excellent adsorption performance of 1T-MoS₂ provides fresh perspectives for the development of MoS₂-based adsorbents.
研究领域:
材料科学
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环境科学
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Kunjie Wang,Yan Jing,Shuang Gao,Xianrong Liu,Bingxin Liu,Yongcheng Li,Peng Zhang,Benhua Xu
Implanting the octahedral phase (1 T) into the hexagonal phase (2H) of the molybdenum disulfide (MoS 2 ) matrix is considered one of the effective methods to enhance hydrogen evolution reaction (HER) performances of MoS 2 . In this paper, hybrid 1 T/2H MoS 2 nanosheets array was successfully grown on conductive carbon cloth (1 T/2H MoS 2 /CC) via facile hydrothermal method and the 1 T phase content in 1 T/2H MoS 2 is regulated to gradually increase from 0 % to 80 %. 1 T/2H MoS 2 /CC with 75 % 1 T phase content exhibits optimal HER performances. The DFT calculation results show that S atoms in 1 T/2H MoS 2 interface exhibit the lowest hydrogen adsorption Gibbs free energies (ΔG H* ) compared with other sites. The improvement of HER performances are primarily attributed to activating the in-plane interface regions of the hybrid 1 T/2H MoS 2 nanosheets. Furthermore, the relationship between 1 T MoS 2 content in 1 T/2H MoS 2 and catalytic activity was simulated by a mathematical model, which shows that the catalytic activity presents a trend of increasing and then decreasing with the increase of 1 T phase content.
研究领域:
材料科学
·
理论计算
·
电催化
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PubMed
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 24
·期 3
·620-627
·
IF 3.545
Wei Zhan,Nan Li,Shixiang Zuo,Zhimin Guo,Chenghong Qiang,Zhengping Li,Jiangquan Ma
The rational design and synthesis of electrocatalysts for hydrogen evolution reaction (HER) remain great challenges. Herein, cubic RuSe2 (c-RuSe2) electrocatalysts with different 1T phase ratios (ranging from 20.53% to 64.97%) and crystallinities (ranging from 1.72% to 89.10%) were developed by a fast and efficient microwave-assisted synthesis method. Remarkably, the c-RuSe2 calcined at 500 °C (RuSe2-500) with 45.46% 1T phase and 86.75% crystallinity exhibited a small overpotential of 29 mV at 10 mA cm−2 and a Tafel slope of 64 mV dec−1, close to the commercial Pt/C (31 mV, 53 mV dec−1) and better than most of the reported materials. The enhanced performance of RuSe2-500 could be attributed to the crystallinity, and the 1T phase content reached a certain equilibrium at 500 °C. Moreover, RuSe2-500 had the smallest charge transfer resistance, mainly due to its abundant active centers and excellent conductivity brought by the 1T phase, which were in favor of the HER kinetics and catalytic performance. This study explored the relationship between the ratio of the 1T phase and crystallinity in c-RuSe2, and gives a new pathway to improve the activity by synergistic regulation.
研究领域:
材料科学
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电化学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jingdong Li,Arthur Listwan,Jianxing Liang,Feng Shi,Kan Li,Jinping Jia
In this work, defect-rich 1 T-MoS 2 nanosheets are successfully synthesized by solvothermal method with acetic acid as the templating agent. It is found that changing the concentration of acetic acid can regulate the proportion of 1 T phase and affect the activity of hydrogen evolution. Under the optimum concentration of acetic acid, the overpotential is as low as 136 mV at the current density of 10 mA cm −2 with a Tafel slope at only 45 mV dec −1 , which shows an attractive potential for the development of electrocatalytic hydrogen evolution. In addition, the addition of acetic acid prevents the agglomeration of 1 T-MoS 2 and thus increases the stability of electrode materials, which is conducive to the long-term hydrogen evolution reaction and cost control. Most importantly, according to comparing several small molecular carboxylic acids, the probable formation mechanism of 1 T-MoS 2 nanosheets is proposed.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
ENERGY & FUELS
·
2026
·
IF 5.3
Rong Ma,Yuxin Xie,Xudong Hu,Hao Wang,Dandan Yuan,Zhida Li,Deqiang Ji,Hongjun Wu
Metallic-phase MoS2 (1T-MoS2) is considered a promising catalyst for the hydrogen evolution reaction (HER) in acidic media, largely due to the abundant surface active sites induced by sulfur vacancies (SV). However, existing defect engineering approaches for MoS2 often involve corrosive chemicals or specialized equipment, hindering its practical scalability. In this work, 1T-MoS2 is synthesized via a facile one-step hydrothermal method, and defect engineering is achieved simply by modulating the sulfur-to-molybdenum (S/Mo) molar ratio in the precursor solution. The optimized catalyst exhibits a low HER overpotential of 266 mV at −10 mA cm–2 and a Tafel slope of 72 mV dec–1 in a 0.5 M H2SO4 electrolyte. It also shows outstanding operational stability, with only a 15 mV increase in overpotential at −10 mA cm–2 after 150 h of continuous HER testing under −0.7 V vs RHE (∼200 mA cm–2). The enhanced performance is attributed to multiple synergistic effects induced by SV defects, including reduced charge transfer resistance, accelerated reaction kinetics, and an enlarged electrochemically active surface area. Overall, this work offers a simple, scalable route to prepare SV-tuned 1T-MoS2, and it provides useful design insights for developing efficient and durable MoS2-based HER electrocatalysts.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Jingui Han,Zhitao Shao,Yaozu Jia,Peiyao Liu,Zuqi Han,Xitian Zhang,Lili Wu,Xinzhi Ma
The practical applications of lithium–sulfur (Li–S) batteries have been significantly impeded by the heavy shuttle effect and slow bidirectional conversion of lithium polysulfides (LiPSs). In this study, a hierarchical NiS2/1T-MoS2 nanocomposite is utilized as a functionalized separator modifier to overcome the challenges. The MoS2 nanosheets are vertically and uniformly aligned on the surface of NiS2 microspheres, constructing a hierarchical yolk–shell structure. The NiS2 support not only significantly reduces the agglomeration of MoS2 nanosheets but also effectively stabilizes their 1T-phase structure, which is highly desirable for high-performance Li–S batteries. The Li–S battery with the NiS2/MoS2–CNT-modified separator delivers an excellent initial specific capacity of 1228 mA h g–1 at 0.2 C with a high-capacity retention of 85% over 100 cycles. It even achieves a discharge capacity of 722 mA h g–1 at 5 C. Furthermore, it maintains remarkable cycling stability with only 0.051% capacity decay per cycle during the long-term cycles at 1 C. This study not only provides a viable scheme for separator modifier design toward advanced Li–S batteries but also offers a universal route for stabilizing the 1T-phase structure of MoS2.
研究领域:
材料科学
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电化学
·
能源存储
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高影响因子
Small
·
2018
·Vol. 14
·期 14
·1704079
·
IF 9.598
Peng Miao,Jing-Kai Qin,Yunfeng Shen,Huimin Su,Junfeng Dai,Bo Song,Yunchen Du,Mengtao Sun,Wei Zhang,Hsing-Lin Wang,Cheng-Yan Xu,Ping Xu
2D transition metal dichalcogenides materials are explored as potential surface-enhanced Raman spectroscopy substrates. Herein, a systematic study of the Raman enhancement mechanism on distorted 1T (1T′) rhenium disulfide (ReS 2 ) nanosheets is demonstrated. Combined Raman and photoluminescence studies with the introduction of an Al 2 O 3 dielectric layer unambiguously reveal that Raman enhancement on ReS 2 materials is from a charge transfer process rather than from an energy transfer process, and Raman enhancement is inversely proportional while the photoluminescence quenching effect is proportional to the layer number (thickness) of ReS 2 nanosheets. On monolayer ReS 2 film, a strong resonance-enhanced Raman scattering effect dependent on the laser excitation energy is detected, and a detection limit as low as 10 −9 m can be reached from the studied dye molecules such as rhodamine 6G and methylene blue. Such a high enhancement factor achieved through enhanced charge interaction between target molecule and substrate suggests that with careful consideration of the layer-number-dependent feature and excitation-energy-related resonance effect, ReS 2 is a promising Raman enhancement platform for sensing applications.
研究领域:
材料科学
·
光学
·
纳米技术
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DOI
高影响因子
iScience
·
2024
·
IF 4.6
Tianlan Yan,Yingshuai Jia,Kaige Hou,Zhuxin Gui,Wenbiao Zhang,Ke Du,Di Pan,He Li,Yanghao Shi,Lu Qi,Qingsheng Gao,Yahong Zhang,Yi Tang
Hydrodesulfurization (HDS) is a commonly used route for producing clean fuels in modern refinery. Herein, ammonium/amine-intercalated MoS 2 catalysts with various content of 1T phase and S vacancies have been successfully synthesized. Along with the increment of 1T phase and S vacancies of MoS 2 , the initial reaction rate of the HDS of dibenzothiophene (DBT) can be improved from 0.09 to 0.55 μmol·g cat −1 ·s −1 , accounting for a remarkable activity compared to the-state-of-the-art catalysts. In a combinatory study via the activity evaluation and catalysts characterization, we found that the intercalation species of MoS 2 played a key role in generating more 1T phase and S vacancies through the ‘intercalation-deintercalation’ processes, and the hydrogenation and desulfurization of HDS can be significantly promoted by 1T phase and S vacancies on MoS 2 , respectively. This study provides a practically meaningful guidance for developing more advanced HDS catalysts by the intercalated MoS 2 -derived materials with an in-depth understanding of structure-function relationships.
研究领域:
化学工程
·
材料科学
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 5
·4121-4128
·
IF 2.22
Qiao Wen,Ma Tiantian,Xu Xiaoyong,Wu Liqian,Yan Shiming,Wang Dunhui
Molybdenum disulfide (MoS 2 ) has been considered to be a promising electrocatalyst for hydrogen evolution reaction (HER). Incorporation of 1 T phase is a strategy to allow basal planes of MoS 2 nanosheets simultaneously possess highly active catalytic sites and metallic property. This strategy requires as many basal planes as possible to be exposed to the surface, thus enabling the active sites on the basal planes to participate in the catalytic reaction. Herein, we report a porous ultra-thin 1 T phase MoS 2 (1 T-MoS 2 ) nanosheets prepared by a SiO 2 nanospheres template method. Ultra-thin MoS 2 nanosheets grow laterally around the surface of SiO 2 nanospheres. After etching SiO 2 , the rest porous ultra-thin MoS 2 nanosheets ensure the maximized exposure of basal plane active sites. In addition, the metallic porous structure can also facilitate transport of mass in holes and transfer of electron on basal planes. The synergistic effect of these aspects endows our sample with improved hydrogen evolution capability. The onset overpotential at 1 mA/cm 2 is 131 mV, and the corresponding Tafel slope is 63 mV/dec.
研究领域:
材料科学
·
电化学
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高影响因子
Nano Energy
·
2024
·
IF 16.8
Wenxiang Zhu,Qintao Sun,Mengjie Ma,Fan Liao,Qi Shao,Hui Huang,Kun Feng,Dongdong Gao,Jinxin Chen,Hao Yang,Peiping Yu,Jun Zhong,Tao Cheng,Mingwang Shao,Yang Liu,Zhenhui Kang
Iridium (Ir) - based electrocatalysts, as the benchmark electrocatalysts for oxygen evolution reaction (OER), still suffer from sluggish kinetics and substantial overpotential. Here we show the fabrication of heterophase IrO 2 catalysts with homogeneous distribution of rutile phase on 1 T phase (referred to as m-IrO 2 ) by a simple air-annealing method. In acidic condition, the m-IrO 2 catalyst exhibits high activity with a low overpotential of 170 mV at 10 mA cm −2 and good stability with no sign of deactivation over a prolonged 508-h continuous operation, making it one of the best-performing acid-stable OER catalysts. In this system, H 2 O first forms OH* and O* on the rutile phase, and then the interfacial oxygen migrates from the rutile phase to the 1 T phase. Subsequently, O* drives the OER reaction on the 1 T phase, resulting in the generation of OOH* and eventually the formation of O 2 . The interfacial oxygen migration within the heterophase structure of m-IrO 2 boosts the acidic water oxidation activity significantly. These findings provide a promising design strategy for creating high-activity catalysts suitable for acidic conditions through the manipulation of interfaces.
研究领域:
材料科学
·
电化学
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高影响因子
Small Structures
·
2022
·Vol. 3
·期 9
·2200025
·
IF 11.343
Tao Xu,Shouheng Li,Aolin Li,Yue Yu,Hui Zhang,Ping Hu,Wenzhe Zhou,Liping Sheng,Tian Jiang,Haifeng Cheng,Xiang'ai Cheng,Fangping Ouyang,Jin Zhang,Shanshan Wang
Alloying is widely applied to tailor properties of 2D materials. Herein, a space-confined chemical vapor deposition (CVD) strategy to homogeneously grow 100 μm-sized monolayer 1T’-MoTe 2 in batches is developed. Aberration-corrected annular dark-field scanning transmission electron microscopy combined with density functional theory calculations is applied to investigate the atomic structural alteration of 1T’-MoTe 2 alloyed with sulfur. 1T’-to-2H phase transition is observed, triggered by both thermodynamic (stability improvement) and kinetic (phase transition barrier reduction) reasons. The alloying degrees of MoS 2 x Te 2(1− x ) grown at different temperatures display homophilic and random configurations, respectively, providing a feasible approach to tailor the atomic mixture of the alloying elements. The intralayer reconstruction and the interlayer displacement take place as defect concentration increases at elevated alloying temperatures. In contrast, 1T’-MoTe 2 displays high susceptibility in the presence of oxygen. An encapsulation method is developed using CVD-grown monolayer MoS 2 , extending the lifetime of monolayer tellurides from several minutes to at least 24 h. These results gain fundamental insights into the structural change in both the beneficial (sulfurization) and detrimental (oxidation) alloying processes of atomically thin 1T’-MoTe 2 and provide a new degree of freedom for the controllable growth of 2D alloys (i.e., tailoring the alloying degree).
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高影响因子
Journal of Energy Chemistry
·
2026
·
IF 15.6
Zhiqiang Liu,Henghui Jin,Yongping Du,Weicheng Zhan,Leiming Lang,Guangxiang Liu,Jiangtao Yuan,Pan Feng,Li Tao,Jian Zhang,Guoqiang Luo,Changlin Dong,Jiajun Gu,Wenshu Chen
Restacked two-dimensional (2D) material thin films offer a promising approach for achieving high volumetric energy density supercapacitors, but their ultimate rate performance is constrained by electrolyte ion transport properties. This work systematically investigates the electrochemical behaviors and underlying mechanisms of restacked 1T−MoS 2 films in various aqueous electrolytes. In 1 M CsCl electrolyte, an 8.5-μm-thick 1T−MoS 2 film electrode exhibits ultrafast ion storage kinetics with a b -value of 0.94 and a remarkable volumetric capacitance ( C v ) of 221 F cm −3 at 1,000 mV s −1 , significantly outperforming other ionic systems. The electrode also demonstrates excellent cycling stability with 87% capacitance retention after 10,000 cycles at 10 A g −1 . Compared to reported advanced graphene, MXene, and oxide-based electrodes, the 1T−MoS 2 film electrodes in 1 M CsCl show an integrated advantage of ultrathin characteristic and ultrahigh C v under considerable high scan rates of 500 to 1,000 mV s −1 . Theoretical calculations reveal that Cs + possesses the lowest diffusion barrier between 1T−MoS 2 interlayers, where its weak solvation effect facilitates rapid ion storage kinetics. This work not only elucidates the ultrafast transport mechanism of Cs + within confined 2D spaces, but also provides insights into developing next-generation ultrafast energy storage devices with high volumetric energy densities through optimized electrolyte–electrode synergy. The electrochemical ion storage behaviors and underlying mechanisms of restacked 1T−MoS 2 film electrodes in various aqueous electrolytes were systematically investigated. The electrodes exhibit ultrafast charge storage kinetics in 1 M CsCl, demonstrating the combined advantages of ultrathin feature and ultrahigh volumetric capacitance at scan rates as high as 1000 mV s −1 , significantly outperforming state-of-the-art reported electrode materials. Download: Download high-res image (188KB) Download: Download full-size image
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