MATERIALS & DESIGN
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2021
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IF 7.991
Tayiba Ilyas,Fazal Raziq,Sharafat Ali,Amir Zada,Nasir Ilyas,Rahim Shaha,Yong Wang,Liang Qiao
Water splitting and CO 2 conversion are emerging energy transfer techniques to generate hydrogen and low carbon fuel as eco-friendly energy sources. Herein, a frugal and facile approach is reported for decorating MoS 2 nanosheets on copper nanorods to design MoS 2 /Cu architecture as a trifunctional catalyst for electrochemical water splitting and photocatalytic CO 2 conversion. Under optimized conditions, MoS 2 /Cu electrocatalyst shows high performance at an overpotential of 252 mV for oxygen evolution reaction and 160 mV for hydrogen evolution reaction to attain 20 mAcm −2 and 10 mAcm −2 current densities in alkaline medium. The improved efficiency is mainly credited to the synergistic effect of MoS 2 nanosheets and Cu nanorods architecture. The electrode delivered a cell voltage of ~1.508 V to impart about 10 mAcm −2 current density with high durability. Also, the negligible overpotential decay after running the cell for 12 h with 3000/HER and 2000/OER CV cycles suggests remarkable stability that makes it a promising electrocatalyst for energy production. The photocatalytic CO 2 conversion activity was also measured, where MoS 2 /Cu exhibited a significant efficiency of CO 2 to methane conversion (CH 4 ~ 23 µmol g −1 h −1 ). Based on the obtained results, it is foreseeable that this work validates the significance of transition metals tuning for electrocatalysts and photocatalysts toward more efficient water electrolysis and CO 2 reduction for potential large-scale energy applications.
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高影响因子
CHEMOSPHERE
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2021
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IF 7.086
Qimao Gan,Yangyi Xiao,Chenxing Li,Huan Peng,Tuqiao Zhang,Miaomiao Ye
Currently, seawater desalination based on air-water interface solar heating has triggered significant research interests because it effectively makes use of the solar energy and avoids fossil fuel consumption. However, to prevent the volatile organic compounds (VOCs) from volatilizing with water vapor which later will liquefy and enter the condensed freshwater is still a challenge. In this work, a g-C 3 N 4 /MoS 2 based floating solar still (CM-FSS) combined with thermal/light activation of persulfate (PS) at air-water interface was applied for clean freshwater production for the first time. The CM-FSS was composed of a g-C 3 N 4 /MoS 2 top layer for solar absorption, simultaneous thermal/light activation of PS and then VOCs degradation at air-water interface, a floating layer of expandable polyethylene (EPE) foam for heat isolation, and a transport channel of air-laid paper (ALP) for seawater and PS solution delivery. The water evaporation rate of the CM-FSS was measured at 1.23 kg m −2 h −1 under 1 kW m −2 , which is 4.09 times higher than that of pure water without an evaporator. With the assistance of g-C 3 N 4 /MoS 2 photocatalytic degradation and thermal/light activation of PS at the air-water interface, a high removal efficiency of a selected model VOCs pollutant of nitrobenzene (NB) could reach to 98.2% in condensed freshwater. Finally, when real seawater samples were employed as source water for solar distillation, the typical water-quality indices such as salinity , turbidity , anions, cations and organics of the condensed freshwater were below the limit values of the Standards for Drinking Water Quality in WHO, US EPA and China.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Hong Li,Xinzhu Wen,Feng Shao,Shiwei Xu,Chao Zhou,Yafei Zhang,Hao Wei,Nantao Hu
Rational materials design is critical to develop advanced electrodes for high-performance sodium-ion battery. In this work, a well-designed structure with interlayer-expanded molybdenum disulfide (MoS 2 ) vertically anchored on graphene substrates (v-MoS 2 /rGO) is achieved by one-pot hydrothermal synthesis . The vertical anchored MoS 2 and high conductivity graphene sheets provide a good path for electrons/ion transfer. More importantly, the direct linkage of O from functional group on graphene oxide (GO) with edge S of MoS 2 (C-O-S) is constructed, which can maintain the stability of the v-MoS 2 /rGO electrode and enhance its electrons transport rate for the high-rate performance and long cycle life. The assembled sodium-ion battery shows high rate performance (129.2 mAh g −1 at 10 A g −1 ) and long cycling stability (251.2 mAh g ‐1 −1 at 2 A g −1 after 1000 cycles with an ultra-low degradation of 10.9 μAh g −1 per cycle). The excellent performance makes the designed structure a fascinating anode for sodium battery.
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2021
·Vol. 45
·期 23
·10296-10302
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IF 3.591
Guligena Pidamaimaiti,Xiaoyu Huang,Kai Pang,Zhi Su,Fu Wang
Chemodynamic therapy (CDT) with selective therapeutic and minimal side effects has attracted increasing attention in recent years. Nevertheless, the limited H2O2 and acid contents in the tumor microenvironment suppress the efficiency of the Fenton reaction. To overcome these issues, photothermal therapy (PTT) is employed to amplify the CDT effect and realize synergistic PTT/CDT. Herein, MoS2 sheets are functionalized with copper (Cu2O–MoS2), which integrates enhanced CDT and PTT to combat tumor cells. The 808 nm light activated Cu2O–MoS2 nanoplatform appears to be a potential candidate to improve the synergistic effect on the enhanced Fenton-like reaction and photothermal performance.
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高影响因子
Advanced Optical Materials
·
2021
·Vol. 9
·期 19
·2100699
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IF 9.926
Laiying Jing,Yiran Wang,Gang Lian,Baitao Zhang,Deliang Cui,Jingliang He,Qilong Wang,Ching-Ping Wong
2D van der Waals (VDWs) heterostructures have attracted much attention due to their exotic electronic and optical properties, which provide a new platform for material science and device fabrication. In this work, by coupling atomic interface engineering, an alternately intercalated superstructure of carbon and MoS 2 monolayers (m-C/MoS 2 ) is designed as a novel saturable absorber (SA) for mode-locked ultrafast laser generation. The novel intercalated structures exhibit excellent properties including wide bandgap, fast inter- and intra-band carrier relaxation time, and superior saturable absorption characteristic, etc. Consequently, a continuous wave mode-locked Yb:CALGO bulk laser with pulse width as short as 92 fs is achieved by using the prepared m-C/MoS 2 SA mirror, which is much shorter than those obtained with other reported 2D materials. This study provides a valuable strategy for the development of ultrashort pulse femtosecond lasers. The novel VDWs heterostructures also open new avenues toward advanced photonic devices.
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CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Xianbo Yu,Guangyu Zhao,Huihuang Huang,Chao Liu,Pengbo Lyu,Naiqing Zhang
Li + /Mg 2+ hybrid-ion batteries (LMIBs), integrating the merits of lithium ion batteries (LIBs) and magnesium ion batteries (MIBs) are considered as an attractive alternative of next generation metal secondary batteries. Due to the sluggish solid-state diffusion kinetic induced by the strong Coulombic interaction between Mg 2+ and host materials, pristine MoS 2 with interplanar distance of 0.62 nm exhibits inferior electrochemical performance for LMIBs with only Li + intercalation. Herein, we report an oxygen-incorporated MoS 2 (O-MoS 2 ) nanoflower anchored on graphene (O-MoS 2 /G) with the interplanar distance of O-MoS 2 from 0.62 nm expanded to 0.885 nm. Even at 1000 mA g −1 , the expanded interlayer spacing can still ensure the Mg 2+ and Li + intercalation/deintercalation into/from the host material simultaneously. Meanwhile, this configuration can effectively reduce the diffusion barrier of metal ions , increase the intercalated number of ions, and enhance the stability of structure. In addition, we found and demonstrated the intercalated Li + had a boosting effect to the intercalation kinetics of Mg 2+ . Compared with the MIBs, the migration energy barriers of Mg 2+ under the existence of Li + intercalating into MoS 2 is reduced from 0.36 eV to 0.16 eV, meanwhile the corresponding intercalation capacity and diffusion coefficient of Mg 2+ are 1.38 and 7.1 times as large as MIBs. As expect, the O-MoS 2 /G exhibits superior rate capability and cycling performance with a reversible capacity of 123.3 mAh g −1 after 2000 cycles charge–discharge processes at 1000 mA g −1 .
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高影响因子
Journal of Environmental Chemical Engineering
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2021
·
IF 5.909
Shan Ni,Liangrong Yang,Hongnan Qu,Xiangyang Zhu,Zihao Xu,Menglei Yuan,Huifang Xing,Li Wang,Jiemiao Yu,Huizhou Liu
Exploring high-efficiency, robust and cost-effective catalysts for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) is greatly desirable. Herein, a series of transition-metal doped MoS 2 (M-MoS 2 , M = Mn, Fe, Co, Ni, Cu, Zn) with expanded interlayer spacing are fabricated by one-step solvothermal strategy. Notably, nickel doped molybdenum disulfide (Ni-MoS 2 ) is found to exhibit prominent catalytic activity with an apparent rate constant (K) of 1.09 min -1 and excellent stability over six continuous runs of recycling experiments. The results demonstrate that the expanded interlayer spacing (0.94 nm) can increase the active sites of reactant absorption, and Ni dopants can lower the energy level (d‐band center) to facilitate the desorption of H. Thus, the catalytic activity of Ni-MoS 2 is enhanced by synergistically structural and energy level modulation. This study offers an effective strategy to design transition metal sulfides with higher catalytic reactivity for the environment-related catalysis processes.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Xian Fang,Zhongrun Zeng,Qiuju Li,Ying Liu,Wenhai Chu,Thandavarayan Maiyalagan,Shun Mao
The chlorination disinfection of drinking water generates disinfection byproducts (DBPs), which are toxic, carcinogenic, mutagenic, and teratogenic. Recently, trichloroacetamide (TCAM) has been proved to be highly genotoxic and cytotoxic. In this study, a sensitive and selective electrochemical sensor for TCAM detection is reported that is based on the triangular silver nanoprism (AgNPR) and MoS 2 nanosheet (AgNPR@MoS 2 ) heterostructure. The AgNPR can catalyze the dechlorination reaction of TCAM; and the abundant S sites on the edge of MoS 2 nanosheet can absorb H + , thereby accelerating the dechlorination hydrogenation reaction. The AgNPR@MoS 2 heterostructure exhibits a high charge transfer rate, high electrocatalytic activity, and good stability in TCAM detection. The sensor shows two linear sensing ranges of 0.5−10 μM and 10−80 μM, a detection limit of 0.17 μM, and high specificity to coexist DBPs. This study is one of the first reports of electrochemical detection of TCAM, and has successfully demonstrated the significant potential of electrochemical sensor for the real-time analysis and monitoring of trace TCAM in drinking water.
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高影响因子
RSC Advances
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2020
·Vol. 11
·期 1
·78-86
·
IF 3.119
Jingxuan Zheng,Bo Zhang,Zhao Wang
g-C3N4/MoS2 composites were successfully prepared by an electron-assisted strategy in one step. Dielectric barrier discharge (DBD) plasma as an electron source, which has low bulk temperature and high electron energy, can etch and modify the surface of g-C3N4/MoS2. The abundant N and S vacancies were introduced in the composites by plasma. The dual defects promoted the recombination and formation of heterojunctions of the g-C3N4/MoS2 composite. It exhibited stronger light harvesting ability and higher charge separation efficiency than that of pure g-C3N4 and MoS2. Compared with the sample by traditional calcination method, the plasma-sample showed better performance for degrading rhodamine B (RhB) and methyl orange. RhB is completely degraded within 2 hours on g-C3N4/MoS2 by plasma. A mechanism for the photocatalytic degradation of organic pollutants via the composites was proposed. An electron-assisted strategy provides a green and effective platform to achieve catalysts with improved performance.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Yujuan Jing,Pingquan Wang,Qiangbin Yang,Qiurun Wang,Yang Bai
Faced with severe corrosion of casing in oil wells, the epoxy coating was applied to prevent corrosion. Based on the mechanism that the filler eliminated the internal stress during the curing process of the coating and prevented the penetration of corrosive medium into the coating, a new filler was successfully prepared by the hydrothermal method . When the molar ratio of the precursor of ZrO 2 to MoS 2 was 1.2:1, MoS 2 was uniformly modified with ZrO 2 through mussel inspired chemistry of dopamine. Introducing fillers into epoxy coatings, specifically, a proper content of 0.8 wt.% filler can greatly improve the mechanical properties and corrosion resistance of the coatings. The coating maintained the excellent corrosion resistance for 16 h under high temperature (108 °C) and high pressure (pressurized with CO 2 gas of 35 MPa), which would provide us a reliable anticorrosive coating for oil wells metal casing.
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高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
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2020
·Vol. 51
·期 2
·307-316
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IF 2.384
Feng Yanlong,Wang Fuyue,Wang Luyu,Guo Manli,Lei Yanming,Feng Ye,Cao Yujuan,Yu Ying
Abstract Three-dimensional porous carbon network (3D-C) was used as the substrate for the in situ growth of molybdenum disulfide (MoS 2 ) through a wet chemistry method. The obtained 3D-C@MoS 2 nanocomposite exhibited a porous structure, high surface area and good electrical conductivity. By using the 3D-C@MoS 2 nanocomposite as a novel electrode modifier, the electrochemical oxidation peak current of bisphenol A (BPA) was greatly enhanced with a lowered background current. The improved sensitivity benefits from adsorption of BPA onto MoS 2 surface, the large surface area and good conductivity of the 3D-C@MoS 2 nanohybrid. By using differential pulse voltammetry (DPV), we observed a good linearity with BPA levels in the range of 0.001–10 μM, with a detection limit estimated to be 0.5 nM (S/N = 3). The 3D-C@MoS 2 modified electrode could be reused for several times in spite of the accumulation of BPA, and the fabrication reproducibility is excellent. The prepared 3D-C@MoS 2 modified electrode showed higher selectivity to BPA than several other phenolic compounds due to their different electrochemical oxidation potentials and the enhanced accumulation property of BPA at the 3D-C@MoS 2 surface. The BPA contents in plastic product and environmental water samples were determined with the proposed method. Graphic abstract
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NANO
·
2020
·
IF 1.566
Dan Zhou,Jianzhong Yin
A surfactant system L64 and alcohol mixture was employed to exfoliate MoS 2 . To reduce the impact of surfactant on the quality of the nanosheet, the concentration of L64 was decreased to an extremely low value 0.0325 mM. Utilize common ultrasonic bath, the production yield of the nanosheet was increased to about 5% per hour, and statistical results from AFM showed that 40% of the nanosheet were less than 4 nm thick. Rheology characterization showed that surfactant alcohol mixtures were shear thinning fluid, yet the viscosity of L64 system varies directly with the shear rate in the high-speed shear region (higher than 400 s −1 ), and further affect the shear strength, therefore viscosity at high-speed shear can be considered as an indicator of the effectiveness for the exfoliation system. Exfoliated MoS 2 was evaluated by hydrogen evolution reaction, and compared to the bulk MoS 2 , the 4 wt% Pt/FL-MoS 2 improved the overpotential from 366 mV to 273 mV at 10 mA • cm − 2 . This study presented a facile and effective route to fabricate 2D MoS 2 with much less residue, and bring more opportunities to exploit clean and nontoxic system to exfoliate 2D materials.
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高影响因子
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