LANGMUIR
·
2025
·
IF 3.9
Tanxia Xiang,Yunlan Xu,Dengjie Zhong,Danli Tang
Organic pollutants present in wastewater pose severe threats to aquatic organisms and human health. In this study, a magnetic MFO/NCS@MoS2 composite catalyst was successfully synthesized via a hydrothermal method and applied for catalytic ozonation of methylene blue (MB). The catalyst was systematically characterized using multiple techniques including XRD, FT-IR, SEM, TEM, and XPS. Results revealed that the incorporation of chitosan (CS) effectively expanded the interlayer spacing of MoS2, which not only enhanced the structural stability but also promoted mass transfer and full exposure of active sites, thus promoting the generation of free radicals and nonfree radicals. As an electron donor, Mo4+ and unsaturated sulfur atoms on the surface of MoS2 not only provided active centers for catalytic ozonation, but also promoted the valence cycling between Mn2+/Mn3+ and Fe2+/Fe3+. In this way, the active centers of Mo4+ and unsaturated sulfur from MoS2 cooperated with the Mn/Fe bimetallic centers from MnFe2O4 to make the catalytic reaction continue. The 1.0MFO/NCS@MoS2/O3 system exhibited excellent catalytic activity and removed 99.13% of MB within 6 min. In addition, it possessed remarkable structural stability, strong anti-interference capability, and environmental compatibility. Radical trapping experiments verified that 1O2, O2•–, and •OH were involved in the degradation process. This study provides a new design strategy for developing efficient and recyclable ozonation catalysts.
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高影响因子
Catalysis Science & Technology
·
2025
·
IF 4.2
Ning Fu,Zhao Liu,Xiangyu Li,Fan Zhu,Jie He,Guixiang Teng,Xingang Li,Chun Zhang
To address the challenge of antibiotic-contaminated water remediation, we designed a defect-engineered CoSe2@MoS2 photocatalyst by integrating selenium-deficient CoSe2 dodecahedra (derived from ZIF-67) with vertically aligned MoS2 nanosheets. The catalyst achieved 90.4% visible-light-driven tetracycline (TC) degradation within 60 minutes, demonstrating a 3.1-fold performance enhancement over pristine MoS2 due to the synergistic effects of atomic-scale defect engineering and heterostructure design. Density functional theory (DFT) calculations revealed a dual enhancement mechanism: selenium vacancies introduced localized mid-gap states, increasing the photogenerated electron density by 2.8-fold, while the CoSe2/MoS2 heterojunction formed a type II band alignment, facilitating interfacial electron transfer via a built-in electric field. In situ spectroscopic analysis confirmed the vacancy-mediated enhancement of reactive oxygen species (·OH/·O2−) generation, showing a 2.8-fold increase in yield. DFT-guided quantitative analysis further demonstrated that the improved activity resulted from the synergistic interaction between heterojunction formation and vacancy modulation. The catalyst exhibited excellent environmental stability, maintaining >88% efficiency over 10 cycles with minimal metal leaching (<0.2 ppm). These findings advance the development of photocatalysts for visible-light-driven wastewater treatment, addressing the critical trade-offs between catalytic efficiency, operational stability, and ecological compatibility.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Zibo Dong,Zhaoyang Wang,Tiantian Yang,Hange Feng,Lingwei Li,INAAM ULLAH,Shaolin Xue
s Among many photocatalysts , the low charge separation efficiency has been an essential reason limiting photocatalytic performance. The heterojunction is a well-established strategy, but the strength of the interfacial electric field constructed by different Fermi energy levels is very limited. In this paper, the simple hydrothermal method is used to selectively deposit growth of MoS 2 on the PbTiO 3 (00 1 ̅ ) surface thereby constructing S-scheme heterojunctions with interfacial electric fields enhanced by polarization properties and bound charges. The enhanced interfacial electric fields offer a strong motivation for the separation and migration of photogenerated carriers. In addition, the oxygen vacancies and photo deposited Pt on the PbTiO 3 (001) surface provide sufficient active sites for hydrogen production , while the petal-like MoS 2 on the PbTiO 3 (00 1 ̅ ) surface can effectively adsorb pollutants for degradation. In the presence of pollutants (TC) as sacrificial agents, the MoS 2 /PbTiO 3 composites with enhanced interfacial electric fields showed excellent photocatalytic hydrogen production performance with hydrogen productivity of 217.09 µmol g −1 h −1 , which is 4.56 times higher than that of pristine PbTiO 3 (47.61 µmol g −1 h −1 ). This study suggests that S-scheme heterojunctions enhanced by polarization properties and bound charges will show significant potential in improving charge separation efficiency.
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CATALYSIS LETTERS
·
2018
·Vol. 148
·期 11
·3445-3453
·
IF 2.911
Li Xia,Dong Hao,Wang Bo,Lv Jun,Xu Guangqing,Wang Dongmei,Wu Yucheng
Firstly, h-CdS/c-CdS homojunction was prepared by solvothermal method with controlling the Cd-to-S molar ratio. Then, the MoS 2 /h-CdS/c-CdS nanocomposites were constructed by ultrasonic method with different MoS 2 amount. The experimental results showed that when the molar ratio of Cd and S was 1:1 and the amount of MoS 2 was 1.5 wt%, the MoS 2 /h-CdS/c-CdS nanocomposites exhibited excellent photocatalytic performance for hydrogen evolution under visible light. The total amount of hydrogen evolution was 3753.12 µmol for 5 h, and its average hydrogen evolution rate was 40.79 mmol h −1 g −1 with an apparent quantum efficiency of 38.16% irradiated at 420 nm, which was about 7.3 times when compared with the h-CdS/c-CdS homojunction (Cd:S = 1:8). The enhanced photocatalytic performance of MoS 2 /h-CdS/c-CdS could be attributed to the improved specific surface area and formation of well bonded interface structure, which not only enhanced the response to visible light but also decreased the recombination rates of photogenerated charge carriers. Graphical Abstract
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Frontiers of Materials Science
·
2021
·Vol. 15
·期 2
·241-252
·
IF 2.765
Du Yan,Niu Ziwen,Yan Tingjiang,Zhu Kunlei,Yu Yang,Jing Zhihong
Carbon-molybdenum disulfide (C-MoS 2 ) ultrathin nanosheets were prepared by a hydrothermal process, and then AgI/C-MoS 2 were synthesized via an in-situ deposition method. This ternary heterojunction composite exhibited better photocatalytic activity compared with those of one-component (pristine MoS 2 ) and bicomponent (AgI/MoS 2 and C-MoS 2 ) materials for the degradation of organic dyes under the visible-light irradiation. In particular, by comparing with AgI/MoS 2 , the significant role of conductive amorphous carbon in AgI/C-MoS 2 in enhancing the charge transfer during the photocatalytic degradation of dyes was first confirmed by photocurrent response and electrochemical impedance spectroscopy (EIS). A possible photocatalytic mechanism was proposed based on the capture experiment results. Furthermore, a straightforward and interesting way had been applied to test the recycled/newly-prepared AgI/C-MoS 2 composite for revealing its distinctive self-cleaning performance and recyclability characteristic besides its good photocatalytic activity. This work could provide a reference for the design of other new ternary heterojunction composite materials with special structures and properties.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jingfan Zhang,Min Zhao,Yubo Zhao,Jingkun Wang,Yanxia Wu,Kexun Li,Ying Liu
Molybdenum disulfide (MoS 2 ) has been considered as an excellent candidate for microwave absorption applications due to its appropriate electrical conductivity and large area size. However, the absorption efficiency and absorption bandwidth of single-phase MoS 2 nanocomposites have been limited due to the weak electrical conductivity and magnetism . This paper proposes a feasible strategy to optimize the electromagnetic properties of MoS 2 absorbent by Fe-doping. The MoS 2 nanosheets with different Fe concentration have been synthesized a microwave-assisted hydrothermal process. Microstructure characterizations reveal that Fe dopants can facilitate the formation mixed 1T/2H phase MoS 2 nanosheets. Owing to the improved permittivity and permeability properties, impedance matching, as well as attenuation characteristics originated from the doping effect and partial phase transformation, the Fe-doped 1T/2H-MoS 2 nanosheets exhibit excellent electromagnetic wave absorbing properties. Its maximum reflection loss reaches − 60.03 dB at the matching thickness of 5.65 mm, and the effective absorption bandwidth below − 10 dB is 5.33 GHz. Such novel doping strategy provides a new insight for design and controlling the magneto-dielectric properties of MoS 2 nanostructures .
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CHEMISTRY-A EUROPEAN JOURNAL
·
2025
·Vol. 31
·期 27
·e202500589
·
IF 3.7
Jinhua Zhou,Tao Ji,Shengyang Xu,Xiong Wang,Juntao Wang,Yating Tang,Yuhong Li,Wenyu Yin,Hongmei Ji,Shaojun Shi,Gang Yang
The development of hierarchical heterostructured materials for sodium-ion batteries (SIBs) remains hindered by suboptimal high-rate cycling performance, primarily due to phase interface pulverization and separation during charge–discharge processes. To address these challenges, we designed a carbon-free hierarchical structure comprising few-layered MoS₂ nanosheets and MoO₂ nanocrystals through precise compositional optimization and rational structural engineering. The heterogeneous components are interconnected through robust S─O covalent bonds, which theoretical calculations and experimental results confirm generate a built-in electric field at the heterointerfaces, significantly enhancing reaction kinetics. Crucially, these covalent bonds stabilize the heterointerfaces, improving structural integrity and mitigating electrode material agglomeration and pulverization. Additionally, the MoS₂/MoO₂ heterostructure enhances Na⁺ adsorption energetics and reduces Na⁺ diffusion barriers, facilitating efficient ion transport. Leveraging its abundant heterointerfaces and stable architecture, the composite delivers exceptional rate performance (432.7 mAh·g⁻¹ at 10 A·g⁻¹) and outstanding cycling stability (nearly 100% capacity retention over 400 cycles at 5 A·g⁻¹). This work provides a strategic framework for designing heterostructured materials with stable interface-rich architectures, advancing the development of high-performance conversion/alloy-type anodes for energy storage applications. Graphical The study designs a carbon-free MoS 2 /MoO 2 heterostructure with abundant heterointerfaces and strong chemical bonding. The formed S─O bonds generate an internal built-in electric field, endowing the heterostructure with metallic conductivity and high Na + adsorption energy. The rational structural design ensures fast reaction kinetics and a stable heterointerface, enabling superior high-rate Na + -ion storage performance.
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TALANTA
·
2018
·
IF 4.244
Xiaorong Gan,Huimin Zhao,Kwok-Yin Wong,Dang Yuan Lei,Yaobin Zhang,Xie Quan
Surface functionalization is an effective strategy in the precise control of electronic surface states of two-dimensional materials for promoting their applications. In this study, based on the strong coordination interaction between the transition-metal centers and N atoms, the surface functionalization of few-layer MoS 2 nanosheets was successfully prepared by liquid phase exfoliation method in N, N-dimethylformamide (DMF), 1-methyl-2-pyrrolidinone, and formamide . The cytotoxicity of surface-functionalized MoS 2 nanosheets was for the first time evaluated by the methylthiazolyldiphenyl-tetrazoliumbromide assays. An electrochemical sensor was constructed based on glass carbon electrode (GCE) modified by MoS 2 nanosheets obtained in DMF, which exhibits relatively higher sensitivity to Cd 2+ detection and lower cytotoxicity against MCF-7 cells. The mechanisms of surface functionalization and selectively detecting Cd 2+ were investigated by density functional theory calculations together with various spectroscopic measurements. It was found that surface-functionalized MoS 2 nanosheets could be generated through Mo-N covalent bonds due to the orbital hybridization between the 5 s orbitals of Mo atoms and the 2p orbitals of N atoms of the solvent molecules. The high selectivity of the sensor is attributed to the coordination reaction between Cd 2+ and O donor atoms of DMF adsorbed on MoS 2 nanosheets. The robust anti-interference is ascribed to the strong binding energy of Cd 2+ and O atoms of DMF. Under the optimum conditions, the electrochemical sensor exhibits highly sensitive and selective assaying of Cd 2+ with a measured detection limit of 0.2 nM and a linear range from 2 nM to 20 μM.
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NPG Asia Materials
·
2016
·Vol. 8
·期 4
·e263
·
IF 8.772
Long Lu-Lu,Chen Jie-Jie,Zhang Xing,Zhang Ai-Yong,Huang Yu-Xi,Rong Qing,Yu Han-Qing
Metal sulfide semiconductors, such as molybdenum disulfide (MoS 2 ) and bismuth trisulphide (Bi 2 S 3 ), are of considerable interest for their excellent applications in photocatalysis and in many other fields. However, the controllable synthesis of MoS 2 /Bi 2 S 3 hybrid nanostructures remains a challenge. In this study, we report a unique sacrificial templating strategy for preparing layer-controlled MoS 2 on three-dimensional (3D) Bi 2 S 3 micro-flowers. For this approach, Bi 2 S 3 was utilized as a sacrificial template to regulate the ion exchange, and the dosage of molybdenum was adjusted to tune the dynamic formation, thus converting the MoS 2 nanosheets on the Bi 2 S 3 micro-flowers from monolayer to multilayer. Such a 3D flower-like hybrid nanostructure enables MoS 2 /Bi 2 S 3 to exhibit adsorption-promoted photocatalysis under visible light irradiation, especially for the excellent photodegradation of low-concentration organic pollutants, for example, azo dye and atrazine. The observed superiority of the 3D MoS 2 /Bi 2 S 3 was mainly attributed to the increased mass transfer, robust light-harvesting capacity, improved charge separation, lower oxygen-activation barrier and enhanced active oxygen yield. Our findings are of interest for the development of novel S-based photocatalysts and provide a new opportunity to efficiently remove low-concentration refractory pollutants.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yilin Wang,Qiming Liu,Yirui Liu,LYU Shuying
SnS 2 is considered a potential anode material for sodium-ion batteries (SIBs) due to its high theoretical capacity, abundant resources and non-toxic properties. However, the low Na + diffusion kinetics and large volume expansion of SnS 2 hinder further development and application. Hence, the heterostructured MoS 2 /SnS 2 /NC nanospheres are synthetized through a facile hydrothermal reaction . By coating SnS 2 on MoS 2 templates, the heterojunction composite MoS 2 /SnS 2 /NC combines the advantages of the highly stable nanosphere structure of MoS 2 and the high theoretical capacity of SnS 2 . In conclusion, it delivers a high specific capacity of 603 mAh g −1 at 10 A g −1 after 2000 cycles and excellent rate performance of 750 mAh g −1 at 0.1 A g −1 . Furthermore, the full-battery of MoS 2 /SnS 2 /NC= |Na 3 V 2 (PO 4 ) 3 exhibits a great capacity of 69.8 mAh g −1 at 100 mA g −1 after 100 cycles. The excellent electrochemical performance of the heterojunction material proves it to be an extraordinary anode material for SIBs.
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JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 14
·10302-10312
·
IF 2.993
Fan Hongmei,Wu Rong,Liu Haiyang,Yang Xi,Sun Yanfei,Chen Chu
Hybrid-phase-MoS 2 (1T@2H-MoS 2 ) nanosheet-coated black TiO 2 spheres (1T@2H-MoS 2 /B-TiO 2 ) were prepared using a hydrothermal method and a chemical reduction method under an argon atmosphere. X-ray diffraction, transmission electron microscope, Raman spectra and X-ray photoelectron spectroscopy indicated the generation of the 1T@2H-MoS 2 and black TiO 2 . The efficiency of the 1T@2H-MoS 2 /B-TiO 2 core–shell structure degradation of rhodamine B (RhB) reached 98.0%. The high photocatalytic activity was due to the presence of 1T-MoS 2 , which accelerated the electron transfer to participate in the redox reaction. In addition, the presence of B-TiO 2 suppressed the undesirable electron–hole recombination. Finally, the synergistic effect between 1T@2H-MoS 2 and B-TiO 2 promoted the separation of the photoelectron–hole pairs. Moreover, scavenger studies found that the hydroxyl radical ( • OH) was the dominant reactive oxygen species in the degradation of RhB under visible light irradiation. The possible growth mechanism and photocatalytic mechanism are discussed in detail. The results of this study will contribute to the improvement in the visible light absorption and photocatalytic degradation of catalysts.
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Journal of Water Process Engineering
·
2024
·
IF 6.3
Zhaoxia Chen,Jianan Qu,Jin Li,Jinjuan Xue,Mingxin Wang
In this work, ZnFe-layered double oxide/MoS 2 (ZnFe-LDO/MoS 2 ) composite was successfully synthesized and applied as a photocatalytic coating immobilizing on polydopamine (PDA)-modified waste cotton fabric (CF) through a mussel-inspired catechol-amine reaction. The resulting ZnFe-LDO/MoS 2 @CF exhibited outstanding photoelectric and photothermal properties, rendering it highly suitable for water purification applications under visible light irradiation. The fabricated ZnFe-LDO/MoS 2 @CF demonstrated great potential in photocatalytic degradation of organic dyes and exhibited photocatalytic antibacterial effects. Compared to fabrics coated with bare ZnFe-LDH and ZnFe-LDO, ZnFe-LDO/MoS 2 @CF showed superior methylene blue (MB) photodegradation performance. LC-MS analysis was conducted to identify intermediate products for MB degradation. Furthermore, ZnFe-LDO/MoS 2 @CF achieved nearly 100 % sterilization efficiency against Escherichia coli and Staphylococcus aureus under visible light ascribed to the synergistic effects of photothermal and photodynamic mechanisms. Impressively, the fabric maintained its MB removal efficiency over multiple reuse cycles and retained its sterilization potency even after repeated washing, highlighting its exceptional reusability and coating stability. The combination of ZnFe-LDO and MoS 2 , with their complementary Z -scheme band structure, effectively expanded light absorption capacity and enhanced charge separation, significantly improving photocatalysis and photothermal performance. This research highlights the potential of ZnFe-LDO/MoS 2 @CF for water purification and sterilization, making it a promising candidate for complex wastewater treatment and multifunctional textile development.
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