CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Wei Ma,Binghua Yao,Wen Zhang,Yangqing He,Yan Yu,Jinfen Niu
A novel piezocatalytic active membrane based on mixed matrix of exfoliated multi-flaw MoS 2 (E-MoS 2 ) nanosheets and polyvinylidene fluoride (PVDF) was synthesized by electrospinning technique. The composition and structure of the obtained E-MoS 2 /PVDF electrospun fiber membranes (EFMs) were characterized via FESEM, HR-TEM, XRD, FTIR and XPS techniques. The piezocatalytic activity of the EFMs was evaluated by the degradation of antibiotic oxytetracycline (OTC) under ultrasonic irradiation in the dark. The 10.0 wt% E-MoS 2 /PVDF EFMs exhibited superior OTC degradation efficiency of 93.08% within 24 min with pseudo-first-order kinetic constant ( k ) of 0.09124 min −1 , which was 21.1 times higher than that of the pure PVDF EFMs. The superior performance was attributed to the synergetic effect of the embedded E-MoS 2 nanosheets and a high proportion of PVDF β -phase (94.1%) to effectively improve the piezoelectric property of composite. In addition, the ultrathin multi-flaw structure of E-MoS 2 provided abundant catalytic active edge sites and increased the surface charge density, promoting the generation of more ∙OH and ∙O 2 – radicals to degrade OTC pollutants. The degradation intermediates of OTC over 10 wt% E-MoS 2 /PVDF EFMs were detected by HPLC–MS and two main degradation pathways were reasonably proposed. The piezocatalytic activity of 10 wt% E-MoS 2 /PVDF EFMs remained stable after five consecutive cycles. This study is meaningful for exploring the composite membrane piezocatalysts for largescale applications in wastewater treatment.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Huaizhi Liu,Liao Xu,Weixu Liu,Bo Zhou,Yinyan Zhu,Lihua Zhu,Xiaoqing Jiang
Here, we report a facile salt-assisted direct liquid-phase exfoliation method for mass production of MoS 2 nanosheets . We choose organic solvent isopropanol (IPA) as exfoliation media and potassium ferrocyanide, potassium sodium tartrate, or sodium tartrate as salt, the assistant. The selected salts show universal and efficient assistant effect for the exfoliation of MoS 2 in IPA. Especially, potassium ferrocyanide (K 4 Fe(CN) 6 ) can enhance the exfoliation efficiency up to 73 times and a dispersion of MoS 2 nanosheets with concentration as high as 0.240 mg mL −1 can be easily obtained in IPA-K 4 Fe(CN) 6 system. Transmission electron microscopy, atomic force microscopy (AFM), and Raman spectroscopy show that bulk MoS 2 has been successfully exfoliated into mono- to few-layer MoS 2 nanosheets . AFM analysis indicates that nearly 60% flakes are monolayer in MoS 2 dispersion.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Chengwei Sun,Gang Song,Lili Chen,Xuemei Ren,Changlun Chen
Magnetic Fe 3 O 4 nanoparticles were coated by polyethyleneimine (PEI), and then Fe 3 O 4 @PEI was further modified with MoS 2 by the hydrothermal method to fabricate 3D flower-like structured magnetic polyethyleneimine@MoS 2 (MP@MoS 2 ) composites, and the composites were served as efficient adsorbents to capture Cr(VI) and Pb(II) from aqueous solution. The effects of temperature, pH, shaking time and environmental conditions on adsorption performance of MP@MoS 2 towards Cr(VI) and Pb(II) have been conducted by batch adsorption experiments. The prepared MP@MoS 2 exhibited high adsorption capacities (192.30 mg/g for Cr(VI) at pH 3.0 and 256.41 mg/g for Pb(II) at pH 6.0) and the adsorption equilibrium could be achieved in a short time. Moreover, MP@MoS 2 composites with high saturation magnetization could be simply separated under an external magnet. Combined experiments and spectral analysis, the underlying adsorption mechanism for Cr(VI) on MP@MoS 2 was mainly attributed to the reduction of Cr(VI) to Cr(III), and the removal of Pb(II) was due to the complexation with sulfur groups and amino-groups. Consequently, the prepared 3D flower-like structured MP@MoS 2 has a great potential for the practical application in removing Cr(VI) and Pb(II) from the aquatic environment.
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Ning Chen,Cuiping Han,Ruiying Shi,Lei Xu,Hongfei Li,Yushan Liu,Junqin Li,Baohua Li
Sodium-ion hybrid capacitors (NIHC) with sodium ion battery type anodes and supercapacitor type cathodes are emerging as an attractive energy storage device due to the integration of high energy, high power and long lifetime. However, the battery type electrodes usually exhibit sluggish reaction kinetics than capacitor type cathodes due to slow Na ion insertion and extraction, which greatly hinders the rate performance. In this paper, carbon coated MoS 2 nanosheets are vertically grown on carbon cloth (CC) substrate using a hydrothermal reaction followed by calcination . The expanded interlayer distance of the MoS 2 ensures high ionic mobility while the highly conductive CC not only provides a self-supporting structure without the addition of insulative binder and additional conductive additive, but also effectively prevents the restacking of the MoS 2 sheets during cycling. Thus the architecture delivers a high area capacity of 0.511 mAh cm −2 at a current density of 0.2 mA cm −2 and a stable capacity retention of 83.3% after 200 cycles at 1 mA cm −2 . Furthermore, NIHC constructed with above anode delivers a high areal energy density of 1.22 mWh cm −2 at a power of 0.76 mW cm −2 , demonstrating an excellent energy-power delivery.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Chencheng Gao,Hongfeng Hua,Ming Du,Jinsong Liu,Xiaoyu Wu,Yong Pu,Xing'ao Li
Electronic regulation through component precise control at the atomic level of electrocatalysts has a fundamental influence on the efficiency of hydrogen evolution reaction (HER). Herein, we successfully demonstrate a ZIF-based charge transfer medium for improving the electrocatalytic activity of MoS 2 towards HER. Benefit for the enough porous structure, superior electron conductivity as well as the synergistic effect from the doped atoms, the hybrids phase (1T/2H) MoS 2 nanoflowers decorated amorphous Mo-CoS x skeleton exhibited the promotional electrocatalytic performance in efficiency and stability. Specifically, an extremely low overpotential of 73 mV at the current density of −10 mA cm −2 and an impressive Tafel slope of 39.2 mV dec −1 had been achieved from the nanocomposites in an acidic condition (0.5 M H 2 SO 4 ). The satisfactory activity improvement can be ascribed to the enhancement of electronic transmission rate as well as the synergistic effects between the doped Mo element and CoS x . This work might develop a new avenue to design highly efficient multicomponent electrocatalysts towards HER.
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Congming Ke,Yiao Pang,Shoulin Liu,Yongping Wei,Yaping Wu,Zhiqiang Li,Qiufa Luo,Jing Lu
Two-dimensional molybdenum disulfide (2D MoS 2 ), with atomic-level thickness, whose crystal crystallinity and size are easily influenced by the surface morphology of the substrate during growth. This work systematically investigates the impact of chemical mechanical polishing (CMP) sapphire substrate on chemical vapor deposition (CVD) growth of 2D MoS 2 . A green and highly efficient CMP method for the sapphire substrate is first proposed, whose maximum material removal rate (MRR) of 4.27 µm/h with surface roughness (Ra) of 0.10 nm (AFM, scanning area of 5 × 5 μm 2 ) can be attained. The size and thickness statistics of 2D MoS 2 domains grown on different substrates indicate that the CMP sapphire substrate in this work can promote the size and monolayer uniformity of 2D MoS 2 during CVD growth. Meanwhile, Raman and photoluminescence (PL) spectra of monolayer MoS 2 grown on different substrates also indicates the monolayer MoS 2 grown on the CMP sapphire substrate in this work has superior crystalline quality and optical properties. The above findings have provided new insights into the mechanisms underlying 2D MoS 2 growth on surfaces in various states and are expected to accelerate the development of large size large-size and high-quality growth of two-dimensional material for further device applications.
✓ 已验证
DOI
高影响因子
Materials Today Physics
·
2024
·
IF 10
Kaiyi Wang,Ruoyan Xu,Fenglin Gao,Shiyao Xu,Shijie Hao,Chen Fan,Yuan Zhang,Yuehua Wei,Xiongxiong Xue,Guolin Hao
Two-dimensional (2D) bilayer transition metal dichalcogenides (TMDCs) have attracted considerable attention due to their promising applications in the fields of electronics, optoelectronics , valleytronics and nonlinear optics . However, the precise synthesis of large-area, high-yield and uniform bilayer MoS 2 semiconductors remains a significant challenge. Herein, we have developed one two-stage chemical vapor deposition strategy based on strain engineering, enabling the controlled preparation of large-area (4 × 6 cm 2 ) bilayer MoS 2 nanostructures . Systematic characterizations indicate that compressive strain was introduced during the growth of first layer MoS 2 , which effectively induces the synthesis of the second layer MoS 2 . First-principles calculations based on density functional theory further reveal the mechanism of strain induced controllable growth of bilayer MoS 2 . Field-effect transistors based on AA and AB stacking bilayer MoS 2 have been fabricated exhibiting excellent electronic properties. Our work provides a new pathway for the precise preparation of bilayer TMDCs nanostructures, offering experimental support for their application in the field of electronic and optoelectronic devices .
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Hao Shang,Hang Shi,Haoliang Yu,Xiaohong Hu,Yan Xia
To develop high-performance non-precious metal hydrogen evolution reaction HER catalysts for anion exchange membrane water electrolysis (AEMWE) and address the issue of the rate of Volmer step in HER being limited by H 2 O dissociation in alkaline media, we propose a strategy where LaNi 5 alloy is used as a co-catalyst for the adsorption and activation of H*, thereby accelerating the rate of the HER. We find that LaNi 5 has a significant HER synergistic effect with MoS 2 . The overpotential at 10 mA·cm −1 for HER catalyzed by the LaNi 5 -MoS 2 composite catalyst is only 143 mV in 1.0 M KOH solution, and the AEMWE using LaNi 5 -MoS 2 as cathode catalyst reaches 1.966 V at 1.0 A·cm⁻² and shows a low degradation. Mechanism studies suggest that LaNi 5 plays the role of adsorbing and activating H*, and the enriched H* from LaNi 5 overflows to MoS 2 , which has good H 2 desorption sites, resulting in improved HER kinetics of LaNi 5 -MoS 2 .
✓ 已验证
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2025
·
IF 8.9
Kaiming Yang,Feifei Wang,Bingrui Shi,Zhenlong Zhang,Weixu Feng,Guoquan Qi,Hongxia Yan
Developing low-temperature curing and high-performance self-lubricating anticorrosion coatings is a challenge for solving energy waste and environmental problems caused by wear and corrosion. Herein, molybdenum disulfide/hexagonal boron nitride (MoS 2 /h-BN) heterojunction particles, prepared by an inexpensive, efficient and solvent-free ultrasonic-assisted ball milling method, are used as solid lubricants and corrosive media barrier. Meanwhile, hyperbranched polysiloxane with terminal epoxy groups (HSiEp) is utilized to improve both the dispersion of the particles and the interfacial bonding strength between the particles and the epoxy binder. Compared with neat epoxy coating, the average friction coefficient of 45.0 wt% MoS 2 /h-BN/6.0 wt% HSiEp/EP coating decreases from 0.38 to 0.19, while the coating resistance (R 1 ) increases from 9.98 × 10 5 Ω·cm 2 to 3.33 × 10 6 Ω·cm 2 . This is mainly attributed to the “soft-hard” particle synergy and the high barrier synergy of HSiEp and MoS 2 /h-BN heterojunction particles. This study provides a theoretical foundation for the development of low-energy-consumption and high-performance epoxy self-lubricating anticorrosion coatings.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jingwen Wang,Yu Yang,Lei Chen,Yanping Ding,Linli Tan,Qiulin Shi,Yong Liu,Pengchao Xie
Molybdenum disulfide (MoS 2 ) is viewed as a promising two-dimensional Fenton-like catalyst, but the basal plane could not be well applied in peroxides activation. In this study, Fe(III) species were atomically impregnated on the MoS 2 basal plane to enhance peracetic acid (PAA) activation. The surface Fe(III) up shifted the d-band centre of MoS 2 and acted as electron shuttles in breaking the O-O bonds of PAA. HO • , CH 3 COO • and Fe(V) were generated in the Fe(III)-MoS 2 /PAA system, whereas the 1 O 2 production was inhibited on the Fe(III)-MoS 2 surface. Sulfamethazine (SMT) was efficiently degraded by Fe(III)-MoS 2 /PAA during 15 min reaction, with the observed removal efficiencies of SMT by Fe(III)-MoS 2 ( k obs ) being 25-fold higher than that by MoS 2 . Increasing the dosages of PAA and Fe(III)-MoS 2 facilitated SMT degradation, and high removal rate of SMT was achieved in the pH range of 3–5. HO • and Fe(V) were identified as critical reactive species responsible for the SMT degradation. Nitrification and Smiles rearrangement were proposed as the degradation pathways of SMT based on the identified oxidation products. This study demonstrates that impregnating Fe species would be an effective strategy for strengthening the Fenton-like reactivity of MoS 2 .
✓ 已验证
DOI
高影响因子
Materials Futures
·
2025
·Vol. 4
·期 2
·025302
·
IF 10.8
Yali Sun,Yun Li,Yang Zhou,Ting Cai,Yuxuan Chen,Chao Zou,Han Song,Shenghuang Lin,Shenghua Liu
Organic electrochemical transistors (OECTs) are regarded as a promising platform for chemical and biological sensing due to their biocompatibility, cost-effectiveness and flexibility. However, maintaining long-term stability of OECTs while achieving high sensitivity remains a challenge for their practical applications. One of the main reasons is the relatively low electronic and ionic conductivity of the channel material. Herein, we present a p-type OECT fabricated by incorporating metal–organic framework (MOF)-MoS2 hybrid nanosheets into the PEDOT:PSS channel via solution-based processes. The strategy significantly improves the sensitivity of OECT, with the transconductance of the device increasing by ∼threefold to 19.34 mS. The higher transconductance is attributed to the hybrid MOF-MoS2 dopant, which not only enhances the electronic conductivity, but also strengthens ion transport and capacitance of the PEDOT:PSS film due to the synergistic effects from high electron mobility of MoS2 and MOF porous structure with large surface area. The fabricated OECT demonstrates high selectivity and sensitivity as a glucose biosensor across a wide concentration range in saliva. Finally, we illustrate the merits of integration machine learning algorithms to construct predictive models using the extensive datasets produced by our sensors for both classification and quantification tasks. These findings highlight the great potential of OECTs incorporating MOF-MoS2 hybrid, as a promising candidate for ultra-sensitive biological detections, and broaden the applications of our OECT biosensors for non-invasive health monitoring and wearable electronics.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2018
·
IF 3.997
Jie Wang,Maosheng Xu,Ke Wang,Zuanguang Chen
Theranostics for imaging-guided cancer treatment have obtained great attention in recent years for their outstanding capability of both tumor diagnosis and treatment. Molybdenum disulfide (MoS 2 ) nanosheets revealed excellent photothermal conversion efficiency, which could be used as photothermal agents. However, MoS 2 nanosheets would often quench or decrease the emission of fluorescence dyes when they were incorporated with these dyes to construct fluorescence-imaging-guided nanotheranostic systems. In this work, MoS 2 nanosheets were embedded into mesoporous silica nanoparticles (MSNs), and Aggregation Induced Emission (AIE) fluorogen PhENH 2 was chemically modified on the surface of MSNs, which could demonstrate more stable fluorescence emission compared with other MSNs with physically absorbed luminescent molecules. Moreover, folic acid (FA) was also chemically decorated on the nanoparticles to facilitate their targeted bioimaging and photothermal therapy. As expected, the obtained PhENH 2 -MoS 2 -FA MSNs could be efficiently taken up by MDA-MB-231 cells than HepG2 cells, owing to the over-expressed FA receptors on MDA-MB-231 cells. Meanwhile, these MDA-MB-231 cells could be efficiently killed under an 808 nm laser irradiation. These results indicated that the achieved multifunctional MSNs chemically decorated with AIE fluorogens would demonstrate more stable fluorescence for bioimaging-targeted photothermal therapy of MDA-MB-231 cells, which made them promising nanotheranostics for further cancer treatment.
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）