SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Ziying Wang,Tong Zhang,Chen Zhao,Tianyi Han,Teng Fei,Sen Liu,Geyu Lu
In this work, we have reported a novel NO 2 sensor using molybdenum disulfide nanoparticles (MoS 2 NPs) decorated RGO (MoS 2 -RGO) hybrids as sensing materials, where MoS 2 -RGO hybrids were prepared by a two-step wet-chemical method. Firstly, MoS 2 NPs prepared by modified liquid exfoliation method from bulky MoS 2 powder. Then, MoS 2 -RGO hybrids were obtained by self-assembly of MoS 2 NPs and GO nanosheets, followed by a facile hydrothermal treatment progress. The combined characterizations indicate that MoS 2 NPs with the size of 3–5 nm are uniformly dispersed on RGO nanosheets. Most importantly, the sensor based on MoS 2 -RGO hybrids could detect NO 2 at room temperature. To further improve sensing performances, especially response and recovery rate, sensing properties are further examined by increasing the operation temperature to 160 °C. It is notably seen that MoS 2 -RGO-based NO 2 sensor not only shows improved sensitivity to NO 2 compared to pure RGO-based sensor, but also exhibits fast response and recovery characteristics (response time and recovery time are 8 s and 20 s toward 3 ppm NO 2 ). This work paves a new way for application of MoS 2 and RGO in chemical sensors, providing an effective method for fabrication of NO 2 sensors with high sensitivity and fast response/recovery rate.
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DOI
高影响因子
RARE METALS
·
2024
·
IF 9.6
Fan Yu-Ning,Zhang Yun-Qiu,Gao San-Shuang,Bi Zeng-Hui,Wang Yin,Zhou Shu-Xing,Liu Qian,Lv Tian-Ping,Hu Guang-Zhi
The use of transition metal-activated peroxymonosulfate (PMS) as an advanced oxidation technology has gained recognition. This study developed a catalyst using cobalt–lanthanum bimetallic oxide supported on layered molybdenum disulfide (MoS 2 ) as a carrier. The Co–La/MoS 2 catalyst was synthesised through coprecipitation, followed by calcination with an optimised metal ratio of Co:La = 2:1 to activate PMS and degrade trace chloramphenicol (CAP) in water. The chemical composition of the catalyst was confirmed using X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). At catalyst and PMS dosages of 0.1 and 0.5 g·L −1 , respectively, the degradation rate of CAP was 95% within 30 min. The catalyst exhibited strong resistance to most interfering anions and maintained a high degradation rate at pH 3–11. Liquid chromatography–mass spectrometry analysis revealed the potential degradation pathways of CAP in the Co–La/MoS 2 (2:1)/PMS system. For other pollutants, such as oxytetracycline, complete degradation was achieved within 20 min, demonstrating the broad applicability of the Co–La/MoS 2 (2:1)/PMS system for the degradation and removal of antibiotic organic contaminants. This study offers a feasible approach for the degradation of antibiotic organic pollutants, including CAP, in natural water bodies. Graphical abstract
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Peifan Qin,Deqi Yi,Jianwei Hao,Ming Gao,Xuewei Cao,Qixing Sun,Jin Zhou
To improve the flame retardancy, mechanical and dielectric properties of epoxy resin (EP), promoting the application in aeronautic industry and other fields, molybdenum disulfide-melamine trimetaphosphate (MoS 2 -MAP) crystallite composites are synthesized. The chemical, crystalline structure and thermal stabilities of MoS 2 -MAPs are thoroughly characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscope (SEM), and thermo-gravimetric analysis (TGA) techniques, respectively. The morphologies of EP/MoS 2 -MAP composites are assessed by SEM, thermal stability by TGA, fire retardancy by limiting oxygen index test (LOI), vertical burning standard test (UL-94), and cone calorimeter tests, mechanical properties by stress strain tests, and dielectric properties by impedance analyzer. Compared with pure EP, the mechanical, dielectrical properties, thermal stabilities and flame retardancy of EP/MoS 2 -MAP composites can be significantly improved due to the good dispersibility of MoS 2 and MAP in matrix. While, the properties of EP/MoS 2 -MAP composites can be further adjusted by controlling the mass raito of MoS 2 and MAP in MoS 2 -MAP crystallite. EP with 4 wt% of MoS 2 -MAP-50% (P content: 0.30%) shows the lowest dielectric constant and dielectric loss values on the basis of good flame retardancy and mechanical properties. The results show that the MoS 2 -MAP crystallite composites can promote the application of EP composites in aeronautical devices, radar detection and other fields.
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高影响因子
ANALYTICAL SCIENCES
·
2018
·Vol. 35
·期 4
·441-448
·
IF 1.355
Wang Xiaojing,Yang Mei,Liu Qingyan,Yang Siyi,Geng Xintong,Yang Yixia,Fa Huanbao,Wang Yongzhong,Hou Changjun
In this paper, an ultrasensitive electrochemical biosensor based on carboxylated multi-walled carbon nanotube/molybdenum disulfide composites (MWCNTs-COOH/MoS 2 ) for the detection of KRAS gene is described. An easy, low-cost method, named one-step hydrothermal, was used for the synthesize of MWCNTs-COOH/MoS 2 nanocomposites, and scanning electronic microscopy (SEM), high resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) were used for characterizing the prepared composites. Furthermore, cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were employed for an electrochemical performance study of this biosensor. Under optimal conditions, the detection limit of target DNA achieved down to 3 fM ( S / N = 3) with high sensitivity; the linear range with the logarithm of the concentrations of target DNA varied from 1.0 × 10 −14 to 1.0 × 10 −7 M. Finally, the practicality of our proposed sensor was verified by a determination of the KRAS gene in human serum samples with good accuracy and high precision due to the excellent conductivity and large active surface area of the MWCNTs-COOH/MoS 2 nanocomposites. This proposed biosensor thus provides a practical method for the rapid and sensitive analysis of gene detection.
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DOI
PubMed
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Meiyi Liu,Yijian Zhao,Shuai Zhou,Jingsheng Tian,He Cheng,Yi Yang,Yuxian Zhao,Yufei Xu,Guanghua Zhao,Zhiyi Yao
Binary transition metal oxides (BTMOs) have drawn considerable attention in recent years for their excellent catalytic properties and chemical stability in the sensing field. Regrettably, the loss of active site exposure originating from the agglomerate during preparation largely restricted their sensing applications. In this work, we report an efficient strategy for advancing the performance of BTMOs in rapid detection based on a 3D molybdenum disulfide nanoflower. The larger surface area, multiple active site exposures, and higher electrical conductivity promote the dispersion of BTMOs and the redox reaction of analytes on the surface of nanocomposites, thereby enhancing the sensitivity and widening the quantitative range. As a proof-of-method application, ferric vanadate (FeVO4) and ciprofloxacin (CIP) were chosen as model catalysts and analytes, respectively. This approach exhibits excellent sensitivity, selectivity, repeatability, and stability. The detection limit could be as low as 26.6 nM, and the linear range covered 3 orders of magnitude (from 0.1 to 500 μM). It also demonstrated good practicality in milk, honey, and drinking water with a recovery of 90.6% to 100.8%. To our knowledge, this is the first report on incorporating MoS2 into BTMOs for augmenting sensing performance in rapid detection.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
He Jiang,Haoliang Wei,Xinkai Li,Yijun Zhang,Tingjiang Lu,Feili Li,Shuang Song,Yan Yu,Meilan Pan,Weiting Yu
The widespread discharge of halogenated organic pollutants (HOPs) in wastewater brings significant risks to the environment and human health due to potent high toxicity, antibacterial activity, and strong biodegradation resistance. Adsorbed atomic hydrogen (H* ads )-mediated electrocatalytic hydrodehalogenation (EHDH) has been recognized as an efficient strategy for HOPs removal through selectively breaking carbon-halogen bonds. In this work atomic Pd uniformly anchored on molybdenum disulfide (denoted as Pd-MoS 2 ) was synthesized through a facile hydrothermal method and found with state-of-the-art specific activity in florfenicol (FLO) removal via the H* ads -mediated EHDH process. Pd-MoS 2 completely dehalogenated (∼100 %) FLO within 30 min at a rate constant of 0.15 min −1 , which was 6.0, 6.5 and 33.1 times the value of MoS 2 , Pd/C and carbon paper samples, respectively. Notably, the toxicity of the wastewater was reduced to 1/6 of its original value after the treatment. Moreover, Pd-MoS 2 presented superior catalytic stability in five successive cycles. Furthermore, Pd-MoS 2 was also robust in complex water environment with practical applicability for industrial wastewater treatment. A dual-active-center mechanism with enhanced H* ads production capacity and the improved H* ads utilization efficiency was contributed to the increased EHDH activity on Pd-MoS 2 .
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Guohui Liu,Qiongfang Wang,Min Zhang,Lei Dong,Pinhua Rao,Xin Zhang,Naiyun Gao,Jing Deng
Fe(II) displayed a great potential in peroxymonosulfate (PMS) activation to remove pollutants but was limited by the cycle of Fe(III)/Fe(II) in the process. To solve this problem, different percentages of flower-like MoS 2 nanosheets were successfully coated on the surface of polyaniline (PANI) nanotubes named as MoS 2 @PANI-X(1, 2, 3) activating PMS efficiently with trace Fe(II) to remove thiamphenicol (TAP), in which MoS 2 @PANI-2 with 92.6% of MoS 2 was the best by removing 99% TAP within 15 min. Notably, the used trace Fe(II) concentration (2 μM) was environmentally friendly because it was far lower than the allowable limit (0.3 mg/L) in standard for drinking water by WHO. With the increase of PMS concentration (0.1–2.0 mM), k PMS increased from 0.083 to 0.118 min −1 and then decreased to 0.098 min −1 .When MoS 2 @PANI-2 dosage increased from 10 to 50 mg/L, k M o S 2 @ P A N I - 2 increased from 0.068 to 0.558 min −1 . However, N O 3 - , C l - , H P O 4 2 - , H C O 3 - , H 2 P O 4 - and natural organic matter inhibited the degradation of TAP in varying degrees. The special structure of MoS 2 @PANI increased many activity sites of Mo(IV) to promote the cycle of Fe(III)/Fe(II) for sustainable and effective activating PMS which generated SO 4 · - , H O · , O 2 · - and 1 O 2 to achieve high removal rate of TAP in a wide range of pH (3–9) (>93%). Twenty-two degradation intermediates were identified and three possible degradation paths of TAP were proposed. Overall, this study provided a novel strategy to remove antibiotics by overcoming the limiting cycle of Fe(III)/Fe(II) in the peroxymonosulfate activation process, which had a great application in water treatment.
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高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2020
·
IF 4.389
Xinke Lv,Xuehong Wang,Songchao Tang,Dongliang Wang,Lili Yang,Axiang He,Tingting Tang,Jie Wei
To improve mechanical, tribological and biological performances of polyetheretherketone (PEEK) for artificial joints applications, molybdenum disulfide (MoS 2 , MS) nanosheets were incorporated into PEEK to fabricate MS/PEEK biocomposites (MPC) with MS content of 4 w% (MPC4) and 8 w% (MPC8). The results revealed that the MS nanosheets with the size of about 400 nm and sheet thickness of about 70 nm were distributed into PEEK matrix, and surface roughness as well as hydrophilicity of MPC increased with the MS content increasing. Moreover, the compressive strength and shore hardness of the MPC were accordingly enhanced. Furthermore, the coefficient of friction of the MPC decreased while the wear resistance of the MPC increased with the MS content increasing in both water-sliding and dry-sliding contact. In addition, rat bone marrow derived stromal cells adhered and proliferated on the composites, indicating that the MPC had no adverse influences on cell behaviors, indicating good cytocompatibility. The results demonstrated that incorporation of MS nanosheets into PEEK produced biocomposites with improved mechanical, tribological and biological performances. MPC8 with no cytotoxicity would have a great potential for artificial joints applications.
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PubMed
高影响因子
POLYMER COMPOSITES
·
2022
·Vol. 44
·期 2
·1240-1251
·
IF 3.531
Haipeng Dong,Minghui Liu,Hongliang Li,Jinhui Wu,Zenan Wu,Baikang Zhu,Lu Zhang,Tao Hengcong
Few-layer molybdenum disulfide (MoS 2 ) was prepared by liquid phase exfoliation with in-situ modification as a nanofiller for polypropylene (PP). Scanning and transmission electron microscopies (SEM, TEM) showed uniform dispersion and excellent adhesion of MoS 2 within the PP matrix. When MoS 2 was centrifuged at 1000 rpm, the mechanical properties of the composite were greatly improved by adding only 0.5 wt.% of MoS 2 . The yield strength, bending modulus, and impact strength increased by 2.3%, 8.9%, and 44.03%, respectively. X-ray diffraction (XRD) and differential scanning calorimetry (DSC) showed that the enhanced mechanical properties of the composites were related to PP crystallographic transformation. Thermogravimetric analysis (TGA) showed that the incorporation of 2 wt.% MoS 2 increased the maximum weight-loss temperature of the composites by approximately 30°C. The mechanisms for increasing thermal stability have been thoroughly demonstrated by band energy analysis. MoS 2 nanosheets have high aspect ratios and strong insulation with a change in band gap width compared to bulk MoS 2 , which is resulting in the stronger interactions at the MoS 2 /PP substrate interface. Furthermore, due to the outstanding carrier for rigid and thermally stable materials, MoS 2 composites displayed excellent mechanical and thermal properties. In addition, unlike PP, the melt flow rate (MFR) of composite materials is more conducive to downstream product processing. This will further promote the application scope of MoS 2 /PP composites.
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高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Songrong Li,Wenli Huang,Peizhen Yang,Zhendong Li,Baiqin Xia,Mingjie Li,Cheng Xue,Dongfang Liu
Nitrogen-doped carbon intercalated molybdenum disulfide nanohybrid (NC-MoS 2 ) with well-interconnected nanosheets was successfully fabricated using a one-pot hydrothermal method and applied as a novel adsorbent to remove tetracycline (TC) from aqueous solutions. Series material characterizations indicated that the intercalation of nitrogen-doped carbon into MoS 2 nanosheets could produce widened interlayer spacing, enlarge the specific surface area and create more extensive functional groups. The adsorption kinetics and isotherms investigations revealed that the pseudo-second-order model and Langmuir isotherm model could fit well the TC adsorption behavior of NC-MoS 2 . Particularly, NC-MoS 2 possessed a high maximum adsorption capacity (1128.4 mg/g) that was approximately 2.8 times that of pristine MoS 2 (409.84 mg/g) at 308 K and pH = 6.0 ± 0.1. Furthermore, the relevant thermodynamic parameters indicated that the adsorption process was spontaneous and endothermic. The adsorption process was dependent on multiple interactions including hydrophobicity , π-π stacking interaction and hydrogen bond . These findings demonstrated that NC-MoS 2 had potential applications for treating TC-containing water and broadened the application of metal sulfides in the environmental field.
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高影响因子
ANALYTICAL SCIENCES
·
2026
·
IF 2
Wang Anqing,Jiang Xiaorui,Duan Dingding
A sensitive electrochemical sensor for the detection of methotrexate (MTX), a widely used anticancer and anti‑autoimmune drug, was constructed. MTX monitoring is of great significance for reducing toxic side effects and guaranteeing clinical medication safety. The sensor was based on a glassy carbon electrode (GCE) modified with a nanocomposite of molybdenum disulfide (MoS 2 ) nanosheets loaded with gold gold nanoflowers (AuNFs), followed by the electrochemical polymerization of alizarin red (AR) to form a stable polymeric film (PAR) on its surface. The MoS 2 nanosheets were prepared via liquid-phase exfoliation, and the AuNPs were deposited onto them via electrodeposition. The morphology of the modified electrode (PAR/Au@MoS 2 /GCE) was characterized by scanning electron microscopy (SEM), and its electrochemical properties were investigated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The synergistic effect of the nanocomposite and the conductive polymer significantly enhanced the electrocatalytic activity towards MTX oxidation. Under optimized conditions, the oxidation peak current of MTX at the modified electrode was nearly six times higher than that at a bare GCE. The sensor exhibited a linear response to MTX concentrations ranging from 0.4 to 38.6 µM, with a low detection limit of 0.027µM (S/ N = 3). The sensor demonstrated excellent reproducibility, stability, and selectivity. Its practical applicability was successfully validated by determining MTX content in commercial tablet formulations with satisfactory recoveries. Graphical abstract A PAR/Au@MoS 2 /GCE electrochemical sensor was fabricated via sonication, electrodeposition, and electropolymerization for the sensitive detection of methotrexate.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Wenyuan He,Xuejun Zheng,Jinfeng Peng,Qiang Zhang,Dazhao Pei,Xinyang Yan
A facile one-step solid-phase synthesis strategy is developed for synthesizing a binder-free molybdenum disulfide/carbon fibers paper (MoS 2 /CFP) anode. The microstructure, composition, morphology and electrochemical performances were investigated. It is found that the thin MoS 2 layers are well anchored on the interlaced carbon fibers to form MoS 2 /CFP, which has mesoporous structure and large specific surface area of ∼18.8 m 2 g -1 . As a result, the obtained MoS 2 /CFP anode exhibits a reversible capacity of 261 mAh·g −1 with 31.2% loading ratio of MoS 2 . After subtracting the capacity of CFP, the MoS 2 in the composite anode delivers a reversible capacity of 539 mAh·g −1 and shows better cycle stability than commercial MoS 2 after 100 cycles at 100 mA g −1 . The remarkable electrochemical performances could be attributed to the buffer space among carbon fibers for the volume changes of MoS 2 as well as the highly conductive carbon fibers network, suggesting that the MoS 2 /CFP is a promising binder-free anode for lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
电池技术
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高影响因子
危险品化学品经营许可证（带存储）