IONICS
·
2021
·Vol. 27
·期 9
·4083-4096
·
IF 2.817
Chen Qiuyang,Xie Fei,Wang Guoyu,Ge Kangkang,Ren Huifang,Yan Manqing,Wang Qiyang,Bi Hong
Conducting polyaniline (PANI) has been widely considered as a promising energy storage material with excellent electrochemical reversibility and high theoretical specific capacitance. Suffering from poor cyclic stability of PANI, here we demonstrate urchin-like molybdenum disulfide (MoS 2 ) with PANI as hybrid electrode materials (MoS 2 @PANI) via one-pot hydrothermal method. In our case, the electrostatic attraction and hydrogen bond interaction between MoS 2 and PANI synergically improve the structural integrity and specific surface area of the binary MoS 2 @PANI hybrids. Specifically, MoS 2 @PANI with 25 wt% MoS 2 (PM25) delivers a maximum capacitance of 645 F g −1 at 0.5 A g −1 with good cycling stability (89% capacitance retention after 2000 cycles at a current density of 10 A g −1 ). Compared to pure PANI (335 F g −1 ), the improvement of capacitive energy storage ability indicates that urchin-like MoS 2 @PANI hybrids with a stable morphology and unique structure are promising for hybrid supercapacitor materials.
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高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2020
·
IF 7.094
Jialin Ma,Hengdong Ren,Zhenying Liu,Jun Zhou,Yueqin Wang,Biao Hu,Yin Liu,Ling Bing Kong,Tianshu Zhang
A microwave absorber of MoS 2 -PANI with three-dimensional spherical structure was synthesized. The absorber was prepared by one-step hydrothermal strategy of a two-dimensional nanoflower-like MoS 2 and in-situ oxidation polymerization reaction with an aniline monomer under ice bath conditions. It can be clearly seen from the SEM characterization that the structure of this three-dimensional MoS 2 -PANI microwave absorber is composed of a soft flower-like MoS 2 as a carrier and a successful intercalation of two-dimensional nano-rod PANI . The effects of aniline monomer, initiator and molybdenum disulfide on the microwave absorption properties of MoS 2 -PANI nanocomposites were investigated by adjusting different mass ratios. The results show that the optimized reflection loss (RL) of the MoS 2 -PANI nanocomposites after interlayer is −59.78 dB, a matching thickness of 3.44 mm and an effective absorption frequency range of 6.56–9.68 GHz (RL < -10 dB), covering C-Band and X-band. The outstanding microwave absorption performance of the MoS 2 -PANI nanocomposites is attributed to three factors, including enlarged specific surface area, reduced particle size and increased electrical conductivity .
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JOURNAL OF POLYMER RESEARCH
·
2022
·Vol. 30
·期 1
·1-10
·
IF 3.061
Huo Yanqiu,Lin Changhong,Ge Huan,Ying Puyou,Huang Min,Zhang Ping,Yang Tao,Wang Tianle,Wu Jianbo,Yan Yusi,Levchenko Vladimir
In this work, the Polyurethane/MoS 2 composites (PUM) filled with different amount of modified molybdenum disulfide (MoS 2 ) were prepared by solution-blending-casting method. The thermal reversible Diels–Alder (DA) bonds enabled the polymer system recyclable ability. The modified MoS 2 were obtained by tannic acid (TA) assistant ultra-sonication exfoliation method were used to improve the gas barrier performance of materials. Compared with the pure PU, about twofold decrease in oxygen gas permeability of PUM composites (from 6719 to 3927 cm 3 /m 2 ˙d˙Pa) were obtained with 1 wt% MoS 2 . More important, the samples showed excellent gas barrier and mechanical properties before and after being hygrothermal aged for 100 h. The PUM composites had good gas barrier and recyclability and had great potential application prospects in packing materials.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Tian-Long Xi,Li-jun Liu,Qi Liu,Hong-Wei Wang,Lu-Yang Zuo,Hui-Tao Fan,Bo Li,Li-Ya Wang
Semiconductor materials have become the primary photocatalysts for photocatalytic hydrogen production. However, the design and synthesis of effective photocatalytic materials with excellent electron/hole separation efficiency, fast charge transfer, and low carrier recombination rate still face great challenge. Herein, hollow p-n heterojunction MoS 2 @ZnIn 2 S 4 nanoboxes are synthesized for the first time by growing n-type ZnIn 2 S 4 (ZIS) two-dimensional nanosheets on the surface of p-type hollow MoS 2 nanoboxes (MSNBs), which exhibits obvious photocatalytic activity. Among them, 5% MSNBs@ZIS photocatalyst shows the highest hydrogen production efficiency of 22.25 mmol h -1 g -1 , which is 7.3 times that of pure ZIS. The high photocatalytic hydrogen production efficiency of 5% MSNBs@ZIS can be attributed to the formation of hollow structure and p-n heterojunction, which can provide a large number of catalytic active sites, large surface area, and can effectively promote the separation of photogenerated carriers, respectively.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Shuang Li,Tong Liu,Yao Yao,Mingzhao Yang,Feifei Li,Zebin Zhao,Shan Zhang,Gaohong He,Xiangcun Li
Solar powered interfacial water evaporation has become one of the most direct and sustainable technologies for seawater desalination. However, developing an efficient, stable evaporator with good salt resistance is a critical and challenging. In this work, MoS 2 -CNT@C membranes synthesized by loading 1T/2H MoS 2 flower spheres on the CNT@C hierarchically porous membrane by hydrothermal method are used as solar water evaporators. MoS 2 -CNT@C membranes, as photothermal conversion materials, have broadband solar absorption capacity and good hydrophilicity. The porous structure of CNT@C membrane can provide great water transport channels, and the decoration of flower spheres MoS 2 enhances the internal reflection which can increase the sunlight absorption capacity, resulting in a jump in water evaporation properties. The membrane has a high evaporation rate of 2.53 kg m −2 h −1 under one sun illumination. In addition, the evaporation rate of the sample in seawater reaches 2.51 kg m −2 h −1 , similar to that in the pure water, and remains stable after several evaporation cycles, ensuring that high quality fresh water can be produced during the desalination.
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ChemistrySelect
·
2024
·Vol. 9
·期 30
·e202401611
·
IF 1.9
Yuyang Wang,Tao Ge,Xinju Zhan,Laigong Guo,Song Liu,Qian Cheng,Yifeng Deng
Graphical Compared with MoS 2 electrode, the MoS 2 /rGO electrodes have higher initial discharge capacity, first coulomb efficiency and lithium ionization diffusion coefficient, and lower internal resistance. It is concluded that most of the oxygen-containing functional groups on the surface of GO are removed, but the conjugated network of graphene is not fully restored. However, the results of EIS directly show that rGO can still provide good conductivity for MoS 2 . MoS 2 /reduced graphene oxide (MoS 2 -I, MoS 2 /rGO-II and MoS 2 /rGO-V) composites with the mass ratio of MoS 2 to GO is 1:1, 2:1 and 5:1, which were used as anode materials for lithium-ion batteries (LIBs). The electrochemical properties and structure were tested and characterized. In the first cycle charge and discharge, the initial discharge capacity of MoS 2 /rGO-II electrode is 821.8 mAh g −1 at 0.1 C, and the first coulomb efficiency is 92.09 %. The capacity attenuation of the second and third cycles is 65 mAh g −1 and 10.1 mAh g −1 , respectively. Compared to MoS 2 electrode, the attenuation of MoS 2 /rGO-II electrode is obviously improved at different rates of 0.1 C, 0.2 C and 0.5 C, so MoS 2 /rGO-II electrode shows excellent rate performance. Through the reaction mechanism analysis, it is concluded that most of the oxygen-containing functional groups on the surface of GO are removed, but the conjugated network of graphene is not fully restored, resulting in the loss of electrical conductivity. However, the results of EIS directly show that rGO can still provide good conductivity for MoS 2 . Therefore, MoS 2 /rGO composites have great potential as electrodes for LIBs and broad research and application prospects in the field of energy storage.
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Nanoscale
·
2014
·Vol. 6
·期 11
·5762-5769
·
IF 6.739
Lihui Yuwen,Fei Xu,Bing Xue,Zhimin Luo,Qi Zhang,Biqing Bao,Shao Su,Lixing Weng,Wei Huang,Lianhui Wang
A general and facile method for water-dispersed noble metal (Au, Ag, Pd, Pt) nanocrystal modified MoS2 nanosheets (NM–MoS2 NSs) has been developed. By using sodium carboxymethyl cellulose as a stabilizer, well-dispersed NM–MoS2 NSs with homogeneously deposited noble metal nanocrystals (NM NCs) can be synthesized in aqueous solutions. Due to the transition from the semiconducting 2H phase to the metallic 1T phase, the chemically exfoliated MoS2 (ce-MoS2) NSs have improved electrochemical activity. The partially metallic nature of the ce-MoS2 NSs and the catalytic activity of the NM NCs synergistically make NM–MoS2 NSs a potential electrochemical catalyst. For the first time, Pd–MoS2 NSs were used as an electrocatalyst for methanol oxidation in alkaline media. The results showed that Pd–MoS2 NSs have enhanced catalytic activity with 2.8-fold anodic peak current mass density compared to a commercial Pd/C catalyst, suggesting potential for application in direct methanol fuel cells (DMFCs).
研究领域:
材料科学
·
电化学
·
纳米技术
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Deqing Zhang,Jixing Chai,Junye Cheng,Yixuan Jia,Xiuying Yang,Hao Wang,Zhenlong Zhao,Chen Han,Guangcun Shan,Wenjun Zhang,Guangping Zheng,Maosheng Cao
The two-dimensional (2D) transition metal dichalcogenide, molybdenum disulfide (MoS 2 ), has been demonstrated to be a new class of microwave absorption (MA) material due to its high specific surface area and peculiar electronic properties. However, its limited MA capacity and bandwidth require further improvement. MoS 2 /RGO composites with improved MA performance have been reported, but the complicated and inefficient preparation process also limits the application of MoS 2 /RGO composites. In this work, we prepare MoS 2 /RGO hetero-structure hybrid with excellent MA performance and broadened bandwidth by a facile one-step hydrothermal method. It is found that the highest reflection loss value of the sample-wax containing 40% MoS 2 /RGO is −49.41 dB at a thickness of 2.52 mm, and the bandwidth of RL values less than −10 dB can reach up to 13.36 GHz (from 4.64 to 18 GHz). Meanwhile, we investigate another strategy to prepare MoS 2 /Fe 3 O 4 hybrid with hetero-structures and their MA performance is studied for the first time. It is found that the highest reflection loss value of sample-wax containing 40% MoS 2 /Fe 3 O 4 is −42.57 dB at a thickness of 3.25 mm, and the bandwidth of RL values less than −10 dB can reach up to 12.73 GHz (from 5.27 to 18 GHz). Results obtained in this study open a new window for designing excellent MA materials for practical applications.
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RSC Advances
·
2019
·Vol. 9
·期 60
·35189-35196
·
IF 3.049
Yi-Wei Cui,Hai-Huan Zhang,Shi-Yong Yu
Efficient C–ZnS/ZnMoO4@MoS2 and C–ZnS/MoS2 nanocomposite photocatalysts, using ZIF-8 derived C–ZnO as a precursor were successfully synthesized using a simple one-pot procedure. This is the first application that involves transforming ZIF-8 into C–ZnMoO4 for photocatalysis. The C–ZnS/ZnMoO4@MoS2 and C–ZnS/MoS2 heterostructures were characterized by X-ray diffraction, UV-vis, X-ray photoelectron spectroscopy, electrochemical impedance spectroscopy, photocurrent measurements, scanning electron microscopy and transmission electron microscopy. The ZM2 sample of C–ZnS/ZnMoO4@MoS2 exhibited enhanced photocatalytic activity of about 2.9 times as high as that of ZIF-8 derived C–ZnO in the reduction of tetracycline hydrochloride, and also showed obvious photocatalytic activity 1.81 and 3.33 times as high as that of a ZM3 sample of C–ZnS/MoS2 and ZIF-8 derived C–ZnO in the degradation of RhB, respectively. The improved photodegradation activity is a result of the heterogenous structure and the tighter contact between C–ZnS and C–ZnMoO4 compared with the physical contact of general heterogenous photocatalysts. The C–ZnS/ZnMoO4@MoS2 heterostructure photocatalyst is expected to be a new type of nanomaterial for the degradation of pollutants from wastewater.
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PubMed
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Environmental Science-Nano
·
2024
·
IF 5.8
Mengxia Wang,Meng Zhang,Qi Han,Yufei Shu,Xun Liu,Beizhao Chen,Yuchao Chen,Bei Liu,Zhongying Wang
Mercury (Hg) contamination in groundwater poses significant environmental and health risks, necessitating effective remediation strategies. Recently, molybdenum disulfide (MoS2) nanosheets have emerged as a promising nanomaterial for the remediation of Hg-associated contaminated groundwater. However, the complex interactions between ubiquitous natural organic matter (NOM) and MoS2 may play a significant role in controlling the removal of Hg from groundwater. In this study, we investigated the mechanisms underlying the role of NOM in Hg(II) removal by MoS2. Our findings demonstrated that NOM inhibited the Hg(II) removal by MoS2 from groundwater at a high molar ratio of Hg/MoS2. However, at a low molar ratio of Hg/MoS2, NOM hardly affected the removal performance of MoS2 on Hg(II) because NOM was unable to compete with sufficient MoS2 to complex with Hg(II). The inhibitory effect of NOM on Hg(II) removal was found to be determined by both the molecular weight (MW) and functional groups of NOM: the NOM fraction with higher MW exhibited a higher degree of inhibition, and the –SH groups displayed preferential binding of Hg(II) rather than the –COOH group. It was concluded that the reduction of MoS2 to Hg(II) gradually decreased with increasing addition of NOM, attributed to NOM complexation with Hg(II). Overall, this study provides insights into the significance of NOM characteristics in controlling the removal of Hg(II) from groundwater.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Jiahui Li,Yufen Wang,Qinyuan Yu,Xuedong Wei
A kind of MoS2@CoFe-MOF electrocatalyst was prepared on carbon cloth by a one-pot hydrothermal method. Excellent electrocatalytic activity of MoS2@CoFe-MOF is demonstrated, and the catalyst has overpotentials of 220 mV and 405 mV at 10 mA cm−2 and 50 mA cm−2, respectively. It is found that the MoS2@CoFe-MOF electrode exhibits excellent stability at the end of operation for 48 000 s, and it has the highest electrochemically active specific surface area and the lowest charge transfer resistance. This work proposes a promising approach in energy chemistry for hydrogen production by electrolysis of water using electrocatalysts composed of non precious transition metal sulfides and bimetallic MOFs.
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APL Photonics
·
2024
·Vol. 9
·期 9
·
IF 5.4
Yin Zhiyong,Jing Xili,Li Shuguang
As an essential biomarker for diagnosing and treating various diseases, low-cost, quantitative detection methods for complementary DNA (cDNA) have received much attention. The surface plasmon resonance (SPR) sensing technique is an effective measurement scheme, but the ambient temperature and pH variations have a non-negligible impact. In this work, we developed a triple-probe SPR sensing system for detecting cDNA concentration, temperature, and pH. In order to satisfy the triple parameter measurements, we used a microstructured optical fiber as the sensing platform, silver and gold films as the excitation layer, and a MoS 2 film as the modulation layer. First, we explore the modulation mechanism of SPR and the conditions for excitation of triple SPR and demonstrate that the carrier concentration is a crucial factor affecting the resonance wavelength. Then, the feasibility of the sensing system for triple-probing is theoretically analyzed. Finally, in the experiment, the optimal parameters of the sensor were determined, and the triple parameter detection was successfully realized. The experimental results show that the three probes can work independently, and the hybridized DNA probe can realize the selective detection of cDNA with a sensitivity of 0.249 nm/(nmol/l). The maximum sensitivity of the pH probe and the temperature probe are 51.5 nm/pH and 6.14 nm/°C. In addition, the experimental results show that the sensing probes have excellent reproducibility. This paper’s innovation is using the fiber optic SPR effect to achieve quantitative detection for cDNA, temperature detection, and pH detection. Therefore, the sensor has a promising future in early diagnosis and biosensing.
研究领域:
生物医学工程
·
分子诊断
·
纳米技术
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高影响因子
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