DALTON TRANSACTIONS
·
2024
·
IF 3.5
Tianxing Wu,Hanqi Meng
Molybdenum disulfide (MoS2)-based electrocatalysts have been considered as promising alternatives to platinum for use in the hydrogen evolution reaction (HER). Developing MoS2 electrocatalysts with more active sites has been recognized as an efficient way to enhance the HER activity. Moreover, phase transition and heteroatom doping show great influence on the HER performance. In this work, we develop a vapor-phase hydrothermal (VPH) approach to introduce phosphorus (P) atoms into a MoS2 nanosheet array on carbon fiber cloth, which presents enhanced HER activity compared with MoS2 without P-doping. The improved performance is due to the synergistic effects of the new active sites formed by the P dopants and the sulfur (S) vacancies in the MoS2 nanosheets generated by the doping of P atoms, which increases the number of active sites. In general, the obtained P-doped MoS2/CFC exhibits a lower onset potential of 80 mV and an overpotential of 162 mV at 10 mA cm−2 than MoS2 without P-doping in 0.5 M H2SO4, accompanied by extremely large cathodic current density and excellent stability. This strategy may open up opportunities for heteroatom doping of electrocatalysts for various applications and provide a new method for material synthesis.
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Chang Liu,Qinghan Wang,Peng Chen,Kaige Sun,Jianbo Li,Luis A. Cisternas,Shaoxian Song,Feifei Jia
MoS 2 materials performed well as adsorbent for Au(S 2 O 3 ) 2 3- recovery, but the effect of its crystal facets on recovery behavior and mechanism remained unclear. In this study, flower-shaped MoS 2 with exposed (110) facet and flake-shaped MoS 2 with (002) exposed facet have been synthesized through a simple hydrothermal method, and their recovery performance and mechanism for gold from Au(S 2 O 3 ) 2 3- solution were explored. The results indicated that MoS 2 materials could recover Au(S 2 O 3 ) 2 3- via adsorption and photocatalytic reduction. Importantly, MoS 2 materials with different exposed facets displayed crystal anisotropy, which greatly affected the recovery behavior of Au(S 2 O 3 ) 2 3- . Flake-shaped MoS 2 showed better dispersibility because of stronger surface electronegativity, and flower-shaped MoS 2 displayed better photocatalysis property thanks to more activated edge sites. The better dispersibility made flake-shaped MoS 2 have higher contact probability to Au(S 2 O 3 ) 2 3- molecules, resulting in faster recovery rate as well as higher recovery for Au(S 2 O 3 ) 2 3- with low concentration. Meanwhile, flower-shaped MoS 2 with better photocatalysis property could release more photogenerated electrons, so that achieving more excellent recovery for Au(S 2 O 3 ) 2 3- with high concentration. The finding in this study enhanced the understanding about the effect of MoS 2 facets on Au(S 2 O 3 ) 2 3- recovery, which had great significance for the design of MoS 2 structure and green production of gold in the future.
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高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Xi Hu,Mingshan Wang,Rui Hu,Lin Yang,Qian Li,Zhenliang Yang,Jianlong Yang,Qiong Duan,Junchen Chen,Bo Yu,Bingshu Guo,Zhiyuan Ma,Yun Huang,Xing Li
Transition metal dichalcogenides (TMDs) are considered as potentially the most promising anodes for sodium-ion batteries, but still suffers from multistep electrochemical processes, resulting in sluggish Na + migration and poor Na + storage capacity in bulk materials. In this work, two kinds of TMDs (WS 2 and MoS 2 ) with similar energy band structures are rationally designed by atomic-scale regulated growth to synthesize porous WS 2 /MoS 2 /Carbon microspheres to disclose their internal kinetics regulation mechanism. It shows that due to the introduction of abundant unsaturated sulfur sites by WS 2 and MoS 2 lattice mismatches, which enhances charge accumulation and serves as active sites to increase the Na + pseudocapacitive storage. Furthermore, a built-in electric field between WS 2 and MoS 2 is formed by the rich heterojunction interfaces, promoting the kinetics of electrochemical transformations of two metallic elements in both WS 2 and MoS 2 . Therefore, the optimized WS 2 /MoS 2 /Carbon provides a discharge specific capacity of 499 mAh g −1 after 500 cycles at 1 A g −1 with a high capacity retention rate of 97.5 %, as well as specific capacity of 435 mAh g −1 after 100 cycles at 0.5 A g −1 with a capacity retention rate of 91 % for WS 2 /MoS 2 /Carbon || Na 3 V 2 (PO 4 ) 3 full cell, which demonstrates satisfactory capacity and outstanding cycling stability.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Rongli Fang,Le Zhang,Shunjiang Huang,Yanshuang Zhao,Shasha Zhang,Yue Wang
Capacitive deionization (CDI) is a hopeful alternative method in treating brackish water with low salt concentration. Molybdenum disulfide (MoS 2 ) has attracted widespread attention as a typical two-dimensional intercalation material, but its easy stacking structure and low conductivity greatly limit its practical application in CDI. This paper developed well-dispersed MoS 2 nanosheets tightly attached to hollow carbon spheres (HCS), and the DBS − ion doped polypyrrole (PPy-DBS) was coated on the surface of MoS 2 . HCS makes MoS 2 nanosheets have improved dispersion and increased layer spacing which provide enough active sites for ion intercalation and transfer. Furthermore, the PPy-DBS provides a convenient electron transport path, accelerates ion transport, ensures good electrical conductivity and reduces ion diffusion resistance.The resulting PPy-DBS-MoS 2 @HCS has a specific capacitance (168.77 F g −1 ) which is 2.32 times that of MoS 2 (72.9 F g −1 ). In addition, in 1.2 V, 500 mg L −1 NaCl solution, the asymmetric CDI cell HCS//PPy-DBS-MoS 2 @HCS displays an extremely high desalting capacity (53.4 mg g −1 ) that is 2.9 and 2.4 times higher than HCS//MoS 2 (18.3 mg g −1 ) and HCS//MoS 2 @HCS (22.3 mg g −1 ), respectively. Therefore, this unique 3D heterostructure (PPy-DBS-MoS 2 @HCS) provides a viable strategy for the development of CDI electrode materials.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Ying Wang,Gaoyuan Gu,Ying Cheng,Chong Peng,Shuyi Yang,Yun Li,Changlong Bi,E. Tao
In this study, an alkaline earth metal doped molybdenum disulfide composite (AEM@MoS 2 , AEM = Ca, Sr, Ba) was presented, which can convert the desolvation process from non-spontaneous to spontaneous during heavy metal adsorption. The doping of MoS 2 by AEM not only increases the ratio of surface-active phases, but also modulates the energy band structure, so that Pb 2+ in solution was spontaneously exposed from the hydrated clusters and was more easily adsorbed on the AEM@MoS 2 surface. Among them, the maximum adsorption amount of Ba-MoS 2 reached 147.84 mg/g and the selectivity coefficient for Pb 2+ was as high as 254.58. The precipitation experiments yielded a Pb 2+ precipitation rate of 10.94 % under the condition of pure water, and molecular dynamics simulation (MD) yielded the diffusion coefficient of Pb 2+ being adsorbed on the surface of Ba-MoS 2 to be only 2.00 × 10 -4 Å 2 ·ps −1 . It was verified that it has excellent anchoring ability for Pb 2+ and effectively avoids the secondary pollution caused by desorption. This work can provide a new idea for improving the mechanism of the heavy metal hydrated ion adsorption process.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Hongliang Li,Zaijun Gong,Dongya Ma,Lei Guo,Jianwei Xie
Hybrid capacitive deionization (HCDI), an emerging desalination technique, is employed for the first time to remove the salt ions in the polypeptide solution, with the novel graphene aerogel (GA)/MoS 2 material as the cathode and the GA material as the anode. Structural characterization and performance tests demonstrate that the dispersed nanosheet structure of MoS 2 and the conductive 3D cross-network structure of GA synergistically stimulate more accessible redox active sites in GA/MoS 2 composite for ion storage. Specifically, the specific capacitance of the GA/MoS 2 composite electrode (143F·g −1 ) is twice that of the single MoS 2 electrode (72F·g −1 ). Also, the GA/MoS 2 electrode possesses exceptional ion removal capacity (32.71 mg·g −1 ) and high mean salt adsorption rate (0.85 mg·g −1 ·min −1 ). The ion removal mechanism and ion selectivity of the Cell GA(+)‖GA/MoS 2 (−) are investigated based on the electrode pairing mode, valence state and radius of ions, and Lewis acid-base theory. More importantly, the application of the Cell GA(+)‖GA/MoS 2 (−) in the polypeptide purification was confirmed by removing salt ions from the Ricinus communis biomarkers (RCB-2) polypeptide solution. The results display that the salt ions (92.1 %) were rapidly removed and the absolute recovery of the RCB-2 sample (62.4 %) was effectively obtained by mass spectrometry analysis. Therefore, this work provides a forward-looking strategy for the fast removal of salt ions from the polypeptide solution.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 30
·期 16
·1910732
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IF 16.836
Liang Cao,Xinghui Liang,Xing Ou,Xianfeng Yang,Yangzhong Li,Chenghao Yang,Zhang Lin,Meilin Liu
Regulating nanocrystal composition with multiphase compounds is considered an efficient approach to enhance electrochemical performance and structure stability. Nevertheless, the thorough understanding of significant reaction mechanisms and insight into the reason of enhanced performance is still urgent. In this work, the bimetallic sulfide Bi 2 S 3 /MoS 2 heterogeneous with abundant phase boundaries is successfully fabricated. The in situ investigation of Na + -storage mechanism confirms that enormous phase boundaries are self-generated by composition optimization and rational structural design. More importantly, the full understanding of abundant phase boundaries on the enhanced electrochemical properties is explicitly unraveled by combining theoretical analysis and experimental results. It confirms that the interior self-built-in electric-field induced by phase boundaries can enhance the reaction kinetics and boost the charge transfer. Besides, the Bi/Na 2 S interface is well-maintained by the homogeneously distributed phase boundaries, effectively improving the conversion/alloying reversibility and keeping integrity without agglomeration and pulverization. As expected, the Bi 2 S 3 /MoS 2 composite exhibits superior rate capability and long-cycling stability (323.4 mAh g −1 after long-term 1200 cycles at ultrahigh rate of 10 A g −1 ). This strategy of constructing sufficient phase boundaries sheds light on the enhancement of reversibility and stability for other advanced conversion/alloying-type anode materials.
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高影响因子
Materials Today Communications
·
2024
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IF 3.7
Qingqing Hu,Yaoqi Huang,Linfeng Li,Yuanyuan Li,Xiaomin Cheng
The slow heat transfer rate, leakage susceptibility, and low photothermal conversion efficiency of the phase change materials (PCMs) may limit their application in thermal energy storage. To tackle this problem, photothermal composites (MoS 2 -rGO) were prepared by hydrothermal synthesis method, and then polyethylene glycol-6000 (PEG-6000) and MoS 2 -rGO composites were encapsulated in polyacrylamide (PAM) by free radical polymerization to form an integrated photothermal storage system. The melting enthalpy (ΔH m ) of the light-thermal phase change gel (LTPCG) was 140.9 J/g and the crystallization enthalpy (ΔH c ) was 134.8 J/g when the PEG-6000 loading reached 85 %. After 300 cycles, the ΔH m and ΔH c were 137.7 and 132.1 J/g, respectively, which were 2.3 % and 2.1 % lower than the initial values, demonstrating excellent thermal storage durability. In addition, under simulated solar irradiation conditions, the MoS 2 -rGO composites were able to capture photons and rapidly transfer phonons with high efficiency, achieving a photothermal conversion efficiency of 87.5 %. The prepared composite PCM has excellent thermal storage and photothermal properties, which are of practical significance for the efficient use of solar energy.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Haochun Chen,Yin Wang,Shuxing Zhou,Nianpeng Li,Xijun Liu,Abdukader Abdukayum,Lei Zhang,Guangzhi Hu
The development of water-separation-performing, noble-metal-free, and cost-effective electrocatalysts is of the utmost importance. This work outlines the preparation of ordered, macroporous MoS 2 –Fe 2 Mo 3 O 8 /MoO 2 electrocatalysts with heterogeneous structures using pyrolysis and sulfidation methods. The resulting macroporous and heterogeneous structures feature more active sites and facilitate ion diffusion, thereby effectively improving the overall performance. The catalyst demonstrated excellent performance in both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) in a 1 M potassium hydroxide solution, requiring overpotentials of 213 and 60 mV, respectively, to achieve a current density of 10 mA cm −2 . Moreover, the MoS 2 –Fe 2 Mo 3 O 8 /MoO 2 -based electrolyzer only requires an output voltage of 1.49 V, exhibiting superior performance and long-term stability compared to commercial catalysts. This study introduces a novel approach for achieving a heterogeneous macroporous structure that can enhance electrocatalysis .
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高影响因子
Nano Energy
·
2024
·
IF 16.8
Hao Zhang,Dongzhi Zhang,Ruiyuan Mao,Lina Zhou,Chunqing Yang,Yan Wu,Yukun Liu,Yuncheng Ji
Self-powered sensing technology and smart perception technology have broad application prospects in flexible and wearable electronics . In this work, a flexible triboelectric nanogenerator (RMP-TENG) based on a room-temperature vulcanized silicone rubber (RTV)@(Molybdenum disulfide (MoS 2 )/Polyvinyl chloride (PVC)) functional layer is developed using a layer-by-layer self-assembly and material doping strategy. The RTV@(MoS 2 /PVC) functional layer is divided into a charge-generating layer (RTV/PVC) and a charge-trapping layer (RTV/MoS 2 ). The synergistic effect of PVC and MoS 2 has improved the surface roughness and charge transfer efficiency of RMP-TENG, doubling its output performance to 1055 V and 112 μA. In order to further improve the tactile sensing accuracy of RMP-TENG, a deep learning model based on Convolutional Neural Network (CNN) and Gated Recurrent Unit (GRU) is developed. It predicts the type of contact material based on the features of tactile signals, achieving a prediction accuracy of 93.975%. Additionally, by combining mobile smart terminals, the CNN-GRU model, and RMP-TENG, a wireless access control system based on self-powered tactile sensing and intelligent material recognition is developed. Through the optimization of these experiments and algorithms, RMP-TENG has achieved real-time material recognition capabilities. This demonstrates the broad application prospects of RMP-TENG in wearable energy supply, intelligent sensing, human-computer interaction, and other areas.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Kayi Shao,Linlong Zhang,Yaping Zhong,Dong Wang
Bacterial infection seriously affects human health, and peroxidase-like (POD-like) nanozymes open up promising avenues for innovative antibacterial strategies beyond traditional antibiotics. In this study, we developed a molybdenum disulfide quantum dot-decorated mesoporous polydopamine nanoparticle (MPM) with highly efficient POD-like catalytic activity, H 2 O 2 production and GSH responsive properties. Molybdenum disulfide quantum dots act as POD-like nanozymes, while mesoporous polydopamine act as a H 2 O 2 generator, GSH consumption agent and nanocarrier. Specifically, MPM could promote the decomposition of overexpressed hydrogen peroxide (H 2 O 2 ) within the bacterial infection microenvironment into hydroxyl radicals (·OH) without the need for external activation, thereby disrupting bacterial structure and function, leading to bacterial death. Additionally, MPM generates H 2 O 2 and consumes GSH, ensuring the persistence and efficacy of ROS-based antibacterial activity. In vitro antibacterial experiments showed that E. coli and S. aureus was inhibited by MPM at rate of 96.3% and 100%, respectively. The antibiofilm experiment further demonstrated that MPM maintained high POD activity and can effectively destroy and inhibit the formation of bacterial biofilm, offering a new strategy for developing antibiotic-free antibacterial methods. In vivo experiments showed that MPM could effectively eliminate bacteria in wound tissues of mice and had a good therapeutic effect on infected wounds. Moreover, MPM exhibits good biosafety, indicating that it has ideal application potential as a highly effective and safe antibacterial agent.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Fengyu Tian,Wenhong Wang,Bin Liu,Yuan Pan,Bin Dong,Yichuan Li,Yanpeng Li,Hailing Guo,Yongming Chai,Chenguang Liu
The future implementation of ultralow sulfur fuel regulations requires researchers to have an excellent understanding of the mechanism of the synergistic effect between the Co(Ni) and (Mo)W sulfides in supported Co(Ni)Mo(W)S hydrodesulfurization (HDS) catalysts. This synergistic effect occurs when the distance between two metals is on the mm or nm scale. To investigate the promotion of HDS on the µm scale, a series of Co and Mo multilayer flake catalysts with a thickness of 1 mm were prepared by laminate molding. The distance between CoS x and MoS 2 in these specially structured catalysts was adjustable on the µm scale by controlling the order and quality of the catalyst powder. The results for the HDS of dibenzothiophene (DBT) demonstrate that there is an obvious synergistic effect between CoS x and MoS 2 on the µm scale. The results of pyridine IR spectroscopy indicate that this synergy is due to CoS x and MoS 2 synergistically generating more coordinatively unsaturated sites (CUSs) and -SH active sites at the μm scale, thus increasing the HDS activity. Moreover, the catalyst activity increases as the distance between CoS x and MoS 2 decreases, and the fact that the feed comes into contact with CoS x first greatly improves the activity.
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高影响因子
危险品化学品经营许可证（带存储）