ADVANCED MATERIALS
·
2022
·Vol. 35
·期 8
·2207447
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IF 32.086
Weiwei Li,Manzhang Xu,Jiuwei Gao,Xiaoshan Zhang,He Huang,Ruoqing Zhao,Xigang Zhu,Yabao Yang,Lei Luo,Mengdi Chen,Hongjia Ji,Lu Zheng,Xuewen Wang,Wei Huang
Synthesis of large-area patterned MoS 2 is considered the principle base for realizing high-performance MoS 2 -based flexible electronic devices. Patterning and transferring MoS 2 films to target flexible substrates, however, require conventional multi-step photolithography patterning and transferring process, despite tremendous progress in the facilitation of practical applications. Herein, an approach to directly synthesize large-scale MoS 2 patterns that combines inkjet printing and thermal annealing is reported. An optimal precursor ink is prepared that can deposit arbitrary patterns on polyimide films. By introducing a gas atmosphere of argon/hydrogen (Ar/H 2 ), thermal treatment at 350 °C enables an in situ decomposition and crystallization in the patterned precursors and, consequently, results in the formation of MoS 2 . Without complicated processes, patterned MoS 2 is obtained directly on polymer substrate, exhibiting superior mechanical flexibility and durability (≈2% variation in resistance over 10,000 bending cycles), as well as excellent chemical stability, which is attributed to the generated continuous and thin microstructures, as well as their strong adhesion with the substrate. As a step further, this approach is employed to manufacture various flexible sensing devices that are insensitive to body motions and moisture, including temperature sensors and biopotential sensing systems for real-time, continuously monitoring skin temperature, electrocardiography, and electromyography signals.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Feifei Lin,Renren Tian,Pei Dong,Guofei Jiang,Fengting He,Shuaijun Wang,Rongbing Fu,Chaocheng Zhao,Ying-Ying Gu,Shaobin Wang
Photoelectrochemical (PEC) reaction with efficient, stable, and cost-effective photocathodes using non-precious metals will be one of the most environmentally friendly technologies for hydrogen (H 2 ) generation under the worldwide pressure for carbon neutrality. Herein, a new 3-dimentional (3D) SiNWs@MoS 2 /NiS 2 photocathode was designed and synthesized. Defect-rich MoS 2 /NiS 2 nanosheets on silicon nanowires (SiNWs) provide more active sites to promote charge transfer and photo-generated electron-hole separation. Meanwhile, the 3D structure of the photocathode provides an effective charge transfer mode and an open channel for rapid H 2 release. The SiNWs@MoS 2 /NiS 2 photocathode exhibits the maximum photocurrent density (21.4 mA·cm −2 at 0.9 V vs. RHE), highest H 2 production rate (183 μmol·h −1 ), smallest diffusion resistance (34.7 Ω), and excellent catalytic stability for more than 10 h at pH = 7. Based on density function theory calculation, the MoS 2 /NiS 2 nanosheets are conducive to chemical adsorption of H 2 intermediates, which are crucial for the maintenance of the composite photocathode in PEC H 2 production.
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Journal of Water Process Engineering
·
2023
·
IF 7
Haixia Lyu,Wenzhang Zhu,Kaixuan Chen,Jun Gao,Zenghong Xie
Three dimensions (3D) flower-shaped g-C 3 N 4 /MoS 2 composite was prepared by immobilizing molybdenum disulfide (MoS 2 ) on carbon nitride (C 3 N 4 ) with structural defects by in-situ hydrothermal assay. The morphological structure and photochemical properties of the obtained catalysts were characterized by SEM, TEM , EDS, FTIR , XRD and XPS. Using methylene blue (MB) as the target pollutant, the photocatalytic performance cyclic stability of g-C 3 N 4 /MoS 2 composite were studied under simulated sunlight. The results showed that the prepared catalyst could remove 98 % of MB within 60 min and still reached 96.4 % after 5 cycles with good stability and regeneration. Its apparent rate constant was 0.0523 min −1 , which was 11.5, 8.2 and 13.9 times higher than those of g-C 3 N 4 (0.00453 min −1 ), C 3 N 4 with structural defects (0.00635 min −1 ) and MoS 2 (0.00377 min −1 ), indicating that the synergistic effect of structural defects, heterojunctions and 3D structure has achieved efficient degradation of MB. Furthermore, the photocatalytic mechanism of g-C 3 N 4 /MoS 2 composite was proposed by combining free radical capture experiment and electron paramagnetic resonance (EPR) spectroscopy and the results showed that that ·OH and ·O 2 - played a primary role in the catalytic degradation.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Weiwei Zhang,Xiaokuo Shen,Wanzhen Li,Jun Wang,Zhao Kuang,Lin Gui,Yugui Tao,Ping Song,Fei Ge,Longbao Zhu
Drug-resistant bacterial infection is one of the major threats to human health. Multidrug-resistant (MDR) bacteria do not respond satisfactorily to conventional antibiotic treatment. Based on the photothermal effect, molybdenum disulfide (MoS2) nanoparticles, photosensitizer chlorin-e6 (Ce6), and an ionic liquid (IL) were used to construct a multifunctional nanoplatform (MoS2-Ce6-IL), which is responsive to near-infrared light (880 nm) and visible light (660 nm) with combined photothermal and photodynamic bacteriostatic activity. The characterization experiments revealed that the nanoplatform is spherical, with a ζ potential of −14.4 ± 1.1 mV, an overall particle size of about 230 nm, and a photothermal conversion efficiency of 54%. In this study, the treatment regimen was more than 93% effective against MDR Escherichia coli (E. coli) and more than 91% effective against Staphylococcus aureus (S. aureus). It can effectively inhibit MDR bacteria and promote skin wound healing in mice infected with S. aureus. By destroying the bacterial cell membrane and DNA, the nanoplatform interferes with the metabolism of substances and energy in bacterial cells and ultimately causes the death of MDR bacteria. In this study, a multifunctional nanosystem with remarkable bacteriostatic activity was successfully synthesized. The molecular mechanism of multidrug resistance in bacteria was elucidated, laying the foundation for its clinical application.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Lianshan Sun,Chunyu Yue,Jianxun Zhao,Peng Chen,Heng Liu,Xinwei Wang,Wanqiang Liu
The three-dimensional mesh CoS 2 -MoS 2 -CNT composite material with abundant pores was prepared by two-step hydrothermal method as CoS 2 -MoS 2 -CNT functional separator and introduced into lithium-sulfur battery. XRD , XPS and SEM tests of CoS 2 -MoS 2 -CNT proved that the material was successfully prepared, and its morphology was a three-position porous structure composed of interwoven nanotubes and nanosheets . The results of Li 2 S 6 adsorption experiment and visual penetration experiment show that CoS 2 -MoS 2 -CNT composite material has strong adsorption effect on LiPS, and can prevent LiPS from passing through the separator, which effectively inhibits the shuttle effect. CoS 2 -MoS 2 -CNT coating effectively plays the synergistic effect of each component to achieve effective fixation and transformation of LiPS, which solves the shortage of lithium-sulfur batteries. Cells with CoS 2 -MoS 2 -CNT functional separators have a high initial specific capacity (0.2C, 1411 mAh g −1 ), excellent rate performance and excellent cycle stability at large currents (0.13% attenuation per cycle at 2C).
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Journal of Food Measurement and Characterization
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2023
·
IF 3.4
Wei Qingyi,Dong Qirong,Pu Hongbin,Sun Da-Wen
Aquaculture fungicide causes threats to the human community and their sensitive detection are thus essential for food safety. Herein, MoS 2 /g-C 3 N 4 @Au heterojunction-based recyclable SERS substrate was developed for fungicide detection. The optimal substrate exhibited good SERS performance with a detection limit as low as 9.908 × 10 −5 mg L −1 for malachite green (MG). Furthermore, an MCN@Au-based photodegradation of crystal violet (CV) under simulated light irradiation was realized, resulting in a degradation rate of 95.6%. With the dual function of the as-synthesized materials, good reusability of the substrates for at least six “detection-degradation” cycles was achieved. In addition, the MG in prawn extract could be sensitively determined with a satisfactory recovery from 91.60 to 124.00%. This work paves an avenue for the fabrication of heterojunction-based recyclable SERS substrates and provides a novel weapon for food safety protection.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Jiaxing Chen,Shufang Wu,Xinlin Zhang,Yongjun Liu
Unsupported MoS2 nanosheets are promising hydrodesulfurization (HDS) catalysts that can effectively convert sulfur species in diesel to hydrocarbons and H2S during the production process of fossil fuels. However, the active site density of MoS2-based catalysts is limited due to the existence of a large amount of inert basal planes, hindering the improvement of MoS2 HDS activity. Herein, a strategy that combines defect control and metal doping is proposed to boost the catalytic activity of unsupported MoS2 nanosheets. By adjusting hydrothermal reaction conditions, few-layered defect-rich MoS2 (DR-MoS2(FL)) is synthesized to significantly enhance the HDS efficiency, which is further improved by incorporating Ni atoms in basal planes, achieving the highest thiophene conversion of 92.3% at 280 °C. Moreover, the Ni-doped DR-MoS2(FL) catalyst exhibits excellent stability with the high activity retained in the recycling reaction. The effect of Ni dopants on the electronic structure and adsorption behavior of the MoS2 basal planes is demonstrated by density functional theory calculation. This work reveals a facile method to tailor the basal planes with the formation of more Ni–Mo–S active sites for highly efficient MoS2 HDS catalysts.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Xin Xiang,Wenxuan Deng,Zhiyi He,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jianmei Lu
In recent years, oil spills and the discharge of industrial organic wastewater have not only damaged society and the economy, but also have had a negative impact on the human environment. The composition of oily wastewater is complex and hazardous. It mainly comprises insoluble organic substances and unsaturated aliphatic hydrocarbons. It exists in the form of oil–water mixtures, freely suspended emulsions, and stable emulsions containing surfactants. The shortage of fresh water resources and how to effectively separate oil and water present serious challenges to the scientific community. In this study, we designed a graphene aerogel with magnetic oil-absorbing functionality, which not only has emulsion-breaking functionality, but also can repeatedly adsorb organic pollutants . More importantly, it exhibits a strong Fenton catalytic effect and can effectively degrade pollutants. The aerogel designed in this research integrates adsorption, catalysis and degradation, and exhibits excellent purification of wastewater containing pollutants such as dyes, antibiotics and aromatic hydrocarbons , providing a novel insight into the treatment of oily wastewater.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
·
IF 5.2
Haiming Fan,Liuyang Yang,Dalei Zhang,Huiliang Wu,Yuhui Yang,Zhiyi Wei,Xiaonan Huang,Yefei Wang,Songda Liu
Environmental-friendly epoxy (EP) composite coatings are regarded as distinguished candidates for preventing metal corrosion. In this paper, we synthesized a novel GO-PDA-MoS 2 /EP nanocomposite coating system by modifying dopamine (PDA) functionalized graphene oxide (GO) with MoS 2 . Here, the effect of different MoS 2 additions on the corrosion resistant properties of coatings was investigated by altering the ratio of MoS 2 to GO-PDA via electrochemical measurements, long-duration immersion experiments, and water contact angle tests. The results indicated that 0.3 wt .% MoS 2 can substantially enhance the interfacial compatibility between EP and GO-PDA and the GO-PDA-MoS 2 -0.3 wt .%/EP coating presented optimum corrosion resistant properties. Specifically, the impedance modulus (|Z|) of the GO-PDA-MoS 2 -0.3 wt .%/EP coating still reached 2.36 × 10 7 Ω·cm 2 after 30 days immersed, which was two orders of magnitude higher than pure EP coatings. This work demonstrates a novel economical and environmental scheme that MoS 2 can be employed to enhance the corrosion resistant properties and improve the interfacial interactions of EP coatings.
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Journal of Energy Storage
·
2023
·
IF 9.4
Qingmiao Zhang,Tianhao Yao,Qiangrui He,Heng Wang,Zhicheng Liu,Daquan Wang,Hongkang Wang,Lingjie Meng
Transition metal sulfides (TMSs) have been considered as up-and-coming anode materials for lithium-ion batteries (LIBs) owing to their large theoretical capacity and good reversibility . However, obvious volume variation and sluggish kinetics greatly limit their practical application. To address this issue, we successfully design and fabricate hollow CoS 2 /MoS 2 nanospheres and effectively enhance their lithium storage performance via N-doped carbon-coating (CoS 2 /MoS 2 @N-C). The unique hollow structure provides shortened ion-diffusion path, while the N-doped carbon shells buffer the severe volume changes during cycling and improve the electronic conductivity of the electrode. When used as an anode material for LIBs, the CoS 2 /MoS 2 @N-C displays high specific capacity (1056.9 mA h g −1 at 100 mA g −1 ), excellent cycling stability (653.9 mA h g −1 after 250 cycles at 1000 mA g −1 ), and rate capability (685 mA h g −1 at 2000 mA g −1 ). The CoS 2 /MoS 2 @N-C||LiFePO 4 full-cell LIB is also assembled and exhibits remarkable performance. The remarkable electrochemical performance of CoS 2 /MoS 2 @N-C electrode could be assigned to the synergistic enhancement effect of the N-doped carbon coating and hollow structure, which efficiently shorten the ion diffusion path , boost the charge transfer rate, and alleviated the volume changes of the electrode upon cycling.
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NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 35
·16531-16538
·
IF 3.3
Yulong Zheng,Hui Zhang,Pei Han,Zhaoshun Zhang,Xueqin Zuo,Qun Yang,Huaibao Tang,Shaowei Jin,Guang Li
Solar distillation can directly produce clean water from non-potable water resources using solar energy and has great promise in desalination systems. However, the improvement of evaporation efficiency through the selection and optimization of suitable candidate materials is still a challenging problem. In this paper, by implementing a customized insulating floating layer and establishing an interfacial evaporation system, we have achieved a successful experiment demonstrating the potential to improve the efficacy of solar steam generation. This system is created by growing 1T-2H mixed-phase molybdenum disulfide composites on the carbonized ZIF8 surface. In this study, the treated composites were well integrated with the thermal insulating floating layer to achieve a stable interfacial structure for photothermal conversion. Furthermore, the cotton threads, known for their great absorbency, created an unhindered pathway for water flow, making it easier for steam to be generated and circulated. Using the above system, under one solar illumination condition, a significant evaporation rate of 1.57 kg m−2 h−1 was attained. The solar steam conversion efficiency of this interfacial heating system under one solar illumination condition was 94.4%. In addition to demonstrating that interface engineering is effective for solar steam production, this work offers a simple and economical water purification method.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Aming Xie,Ronghui Guo,Lipeng Wu,Wei Dong
Developing an effective strategy to regulate the interfacial properties of hierarchical structure is of great significance for preparation of high-performance electromagnetic wave absorption (EMA) materials. Ion-substitution can change intrinsic structure and properties of a materials, but its effect on the interfacial properties of hierarchical structure remained to be explored. Herein, we first constructed a C@MoS 2 hierarchical structure via simple hydrothermal reaction , then used the ion-substitution strategy to replace the S atoms in MoS 2 with O, F and Se, and finally obtained anion-substituted hierarchical structure (C@X-MoS 2 , X = O, F, Se). The results show that ion-substitution destroys the MoS 2 crystal structure and realizes tunable dielectric properties of C@MoS 2 , which leads to further enhancement of overall interfacial polarization. After optimization, the absorption strength and width of C@O-MoS 2 has been significantly improved. The minimum reflection loss (RL min ) reaches −62.17 dB, and the maximum effective absorption bandwidth (EAB max ) is 7.0 GHz. The simulation results show the obtained absorbent can greatly reduce the radar cross section of target, indicating it has broad application potential. Therefore, this work provides a novel method for regulation of EMA performance of hierarchical structure and preparation of high-performance absorbents.
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