Advanced Composites and Hybrid Materials
·
2019
·Vol. 2
·期 2
·330-338
·
IF 0
Wang Jin,Wu Zongchao,Xie Ruihong,Zhu Yuanyuan,Liu Xueting
Nanocomposites of MoS 2 and conjugated polymers are excellent candidates for optical limiters, solid electrodes, electrolytes, and other purposes. The ordered layered structures of nanocomposites are essential. A strategy to prepare the regular two-dimensional (2D) layered MoS 2 /conjugated polymer nanocomposites was developed based on the β -cyclodextrin ( β -CD) template. The complete intercalation nanocomposites of molybdenum disulfide (MoS 2 ) with poly(3,4-ethylenedioxythiophene) (PEDOT), poly(3-methylthiophene) (P3MT), and polypyrrole (PPy) were prepared successfully. MoS 2 is in the form of a monolayer or no more than trilayer with conjugated polymers inserted into the interlayers. In comparison with that of β -CD, sulfonated β -CD ( β -CDSO 3 ) has better water-soluble and act as dopants to improve the electrical and electrochemical performances of these nanocomposites simultaneously. The conductivities of nanocomposites based on β -CDSO 3 template increase by one to three orders of magnitude, and their capacitance performances are superior. As an innovative route to prepare the regular 2D layered MoS 2 /polymer nanocomposites, the methodology is expected to be applicable to a wide range of layered materials and hydrophobic monomers.
A strategy to prepare regular 2D layered MoS 2 /conjugated polymer composites with high conductivity was developed via β -CDSO 3 template.
✓ 已验证
产品关联
DOI
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Yixiong Pang,Lingjun Kong,Diyun Chen,Gutha Yuvaraja
Microwave-induced catalytic system has been widely used in oxidation of organic pollutants, but no report focuses on heavy metal reduction. To expand the application field of microwave-induced catalytic system, MoS 2 decorated MnFe 2 O 4 was synthesized by hydrothermal method and employed for the reduction of Cr(VI) in microwave-induced catalytic system. The morphologies, chemical compositions, and optical properties of the synthesized catalysts were investigated using SEM, XRD, FT-IR and XPS. The MoS 2 -MnFe 2 O 4 samples exhibited significantly enhanced microwave-catalytic performance for Cr(VI) reduction compared to pristine MoS 2 and MnFe 2 O 4 , among which, the MoS 2 -MnFe 2 O 4 (10 wt%) sample was most suitable for Cr(VI) reduction in aqueous solution. 85.8% of Cr(VI) removal was obtained in 16 min in the present of MoS 2 -MnFe 2 O 4 . The effect of catalyst dosage, initial pH and microwave output on Cr(VI) reduction were investigated. Mechanism of Cr(VI) removal was investigated by radical quenching experiments. The enhanced microwave-catalytic activity of MoS 2 -MnFe 2 O 4 may be owing to the fact that MoS 2 can act as an electron acceptor to suppress the recombination of microwave-excited electron-holes. These results showed that microwave-induced catalytic reduction system is promising in Cr(VI) decontamination in aqueous solution.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Xiang Fan,Yurou Zhou,Guan Zhang,Tongzhou Liu,Wenyi Dong
The advanced oxidation processes (AOPs) based on oxysulfur radicals (SO 3 − , SO 4 − and SO 5 − ) has been receiving growing attention in wastewater treatment. In this study, we report the in situ photoelectrochemical activation of sulfite to produce oxysulfur radicals with MoS 2 nanosheets as a wide spectrum absorptive photoanode. At alkaline condition, the selective and efficient conversion of ammonia to dinitrogen was exclusively achieved in the presence of sulfite electrolyte under visible light irradiation. The sulfite plays multiple roles such as working as hole scavenger for improving stability of MoS 2 electrode by inhibiting photo-corrosion and serving as precursor of oxysulfur radicals in the meantime. The influences of radical scavenger, dissolved oxygen and electrolyte on the photoelectrochemical, electrochemical and photochemical conversion of ammonia verified that oxysulfur radicals are more powerful than hydroxyl radicals in terms of ammonia conversion. The proposed system appears to be applicable to in situ treatment of wastewater containing of ammonia and sulfite pollutants, such as wastewater from ammonia-absorption-desulfurization of combustion smoke. This work also provides a new protocol in the design of new AOPs, where oxysulfur radicals can work together with hydroxyl radicals for simultaneous pollutants degradation and detoxification.
✓ 已验证
产品关联
DOI
高影响因子
BIOELECTROCHEMISTRY
·
2019
·
IF 4.474
Lingpu Jia,Yaxin Zhou,Kaipeng Wu,Qingling Feng,Chunming Wang,Ping He
A flexible acetylcholinesterase (AChE) film biosensor, based on a AuNPs-MoS 2 -reduced graphene oxide/polyimide flexible film (rGO/PI) electrode, has been synthesized for paraoxon detection. In this study, the rGO/PI film acts as the flexible substrate and AuNPs are reduced by monolayer MoS 2 under illumination. Transmission electron microscopy revealed that AuNPs are uniformly dispersed on the MoS 2 -rGO/PI electrode surface with a diameter ~10 nm. X-ray photoelectron spectroscopy indicated that a strong binding force exists between reduced AuNPs and monolayer MoS 2 . The AChE modified AuNPs-MoS 2 -rGO/PI flexible film biosensor is used to hydrolyze acetylcholine chloride and obtain a large current response at 0.49 V by differential pulse voltammetry , demonstrating successful immobilization of AChE. In view of the inhibition of paraoxon on the AChE, under optimal conditions, the AChE/AuNPs-MoS 2 -rGO/PI film biosensor shows a linear response over a concentration range 0.005–0.150 μg/mL, a sensitivity of 4.44 uA/μg/ mL, a detection limit of 0.0014 μg/mL, acceptable reproducibility and stability to paraoxon. The flexible film biosensor has also proved used for detection of paraoxon in real samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Meixuan Cai,Ruobai Li,Zhijie Xie,Jiaxing Huang,Yongqin Zeng,Qianxin Zhang,Haijin Liu,Wenying Lv,Guoguang Liu
The development of novel noble metal-free semiconductor catalysts with high photocatalytic efficiency is of great importance toward the degradation of organic compounds. In this work, a core-shell heterojunction MoS 2 /Cd 0.9 Zn 0.1 S photocatalytic material was successfully synthesized via a simple one-step hydrothermal method. The introduction of MoS 2 led to a significant improvement in the photocatalytic degradation of diclofenac (DCF). It was confirmed that 0.1% loading content of MoS 2 achieved an optimal photocatalytic efficiency of 86% in the degradation of DCF under visible light irradiation, which was 1.8 times higher than that of Cd 0.9 Zn 0.1 S. The MoS 2 /Cd 0.9 Zn 0.1 S heterostructured composites possessed improved photocatalytic properties, which implied that the combination of Cd 0.9 Zn 0.1 S and MoS 2 shortened the carrier transport pathway and facilitated the separation efficiency of electrons and holes. Reactive species (RS) scavenging experiments and electron spin resonance (ESR) demonstrated that superoxide radicals (O 2 •− ) and electron holes (h + ) played predominant roles throughout the DCF degradation process. The primary intermediates were explored through HRAM LC/MS/MS, and a transformation pathway was tentatively proposed. This study promoted the application of an economical, highly efficient and visible light driven MoS 2 co-catalyst for the degradation of organic contaminants.
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 35
·13176-13183
·
IF 4.052
Lang Pei,Yongjun Yuan,Jiasong Zhong,Taozhu Li,Tao Yang,Shicheng Yan,Zhenguo Ji,Zhigang Zou
Tantalum nitride (Ta3N5) with an appealing band gap (∼2.1 eV) has emerged as a promising catalyst in the photocatalysis field. However, Ta3N5 application in the photocatalytic hydrogen evolution reaction (HER) is limited due to disadvantages such as unsatisfactory separation and transfer of photogenerated carriers. Here we utilize MoS2 as co-catalysts to promote the kinetics of photocatalytic H2 evolution over Ta3N5. The Ta3N5 nanorods were encapsulated into 3D hydrangea-like MoS2 for maximizing the contact areas between Ta3N5 and MoS2 and offering rich active sites. More importantly, spectroscopic analysis and theoretical calculations consistently reveal that the unique interfacial interaction, as well as the matching band alignment between Ta3N5 and MoS2, accelerates the photogenerated charge extraction from Ta3N5 to MoS2, reducing charge recombination losses in Ta3N5. Thus, the optimized Ta3N5/MoS2 hybrid exhibits a substantially enhanced hydrogen evolution rate (56.5 μmol h−1), over 22 times higher than that of pristine Ta3N5. This work may provide a general strategy to overcome the low photocatalytic activity of nitrides for hydrogen evolution.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2019
·
IF 3.834
Rong Ji,Menghan Zhang,Wei Ma,Zhi Zhu,Changchang Ma,Pengwei Huo,Yongsheng Yan,Yang liu,Chunxiang Li
A new heterojunction photocatalyst of MoS 2 /Co 3 O 4 was synthesized for degrading water organic pollutants firstly. The heterojunction photocatalyst contains small Co 3 O 4 nanoparticles deposited on the surface of MoS 2 nanosheets. The MoS 2 /Co 3 O 4 heterojunction exhibits superior degradation efficiency than pure MoS 2 and Co 3 O 4 for removing 2-mercaptobenzothiazole (MBT) and tetracycline (TC) under visible light. The high degradation efficiency mainly stem from creating heterojunction between MoS 2 and Co 3 O 4 . The uniform particle size of Co 3 O 4 and the better interfacial interaction of MoS 2 and Co 3 O 4 enhance the surface of heterojunction and inhibiting electron-hole pairs recombination. In addition, deep insight in mechanism suggests that holes and superoxide radicals are the major active species in the MBT and TC removal procedures. This present work may provide a promising approach to fabricate other transition metal heterojunction with efficient photocatalytic activity.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Sai Zhang,Yuping Tang,Yanyan Chen,Jianbin Zheng
In this work, 3D flower-like MoS 2 microspheres with nanosheets were synthesized by a simple thiourea-assisted hydrothermal route and employed to support gold nanoparticles in order to fabricate a novel nitrite sensor. By this method, stable and well-distributed gold nanoparticles were formed due to the electrostatic attraction between APTES-functionalized MoS 2 and citric-stabilized gold nanoparticles. Electrochemical investigations indicated that Au NPs/MoS 2 nanocomposites exhibited an excellent performance towards nitrite oxidation . Under the optimal experimental condition (pH 6.0), the sensor displayed a wide linear range from 5.0 μM to 27.8 mM with a high sensitivity of 117.0 μAmM −1 cm −2 and a low detection limit of 1.67 μM. In a word, the present study demonstrates that the Au NPs/MoS 2 composites are promising electroactive materials for developing nitrite sensors with great potential.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROANALYSIS
·
2018
·Vol. 31
·期 3
·422-427
·
IF 2.851
Xue Lou,Li-quan Zhang,Qing-hui Liu,Ying-hui Wang,Lian-Fei Yao,Yan-ting Wang,Zhi-hui Kang,Qiang Zhou,Han-Zhuang Zhang
The performance of nano-sensor based on MoS 2 nanosheet mixed with Au particle is tested based electrochemical test involving cyclic voltammogram and impedance spectroscopy, where the Fe III (CN) 6 3− /Fe II (CN) 6 4− and dopamine (DA) are chosen as research object to verify the role of layer number of MoS 2 nanosheet and the temperature. The electrochemical test shows the Au nanoparticle would improve the electron exchange reaction occurring on the electrode. In the solution of Fe III (CN) 6 3− /Fe II (CN) 6 4− , the electrode reaction follows , where increasing the layer number of MoS 2 nanosheet would restrict the reaction. In the DA system, the reaction of occurs on the electrode and increasing the layer number of MoS 2 nanosheet would facilitate the reaction. The difference as mentioned above is assigned to the energy level shift originated from variance of layer number of MoS 2 nanosheet and the changing of reaction mechanism. In addition, temperature would mainly facilitate the kinetics of electron exchange reaction, which is assigned to the diffusion acceleration of DA molecule. Simultaneously, the desorption process of reactant in the electrolyte would enhance. The role of layer number of MoS 2 nanosheet and the temperature is clarified with the thermodynamic and kinetic properties of electron exchange reaction based on MoS 2 nanosheet, which would improve the understanding of nano-sensor based on MoS 2 nanosheet.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Ying Dong,Chuixiu Huang,Xiao-Yu Yang
Intrinsic wettability of atomically thin solids has a great impact on science and technology. Herein, the wetting property of liquid-exfoliated molybdenum disulfide (MoS 2 ) was investigated. The prepared MoS 2 nanosheets can be well dispersed in nonpolar (1,2-dichloroethane and 1-dodecanol) and polar (water-ethanol cosolvent) solvents. Similarly, the MoS 2 -coated fabric shows excellent underwater superoleophobic and underoil superhydrophobic properties. Taking advantage of the unusual intrinsic wettability, few-layered MoS 2 demonstrates the great potential in on-demand oil-water separation.
✓ 已验证
产品关联
DOI
高影响因子
Results in Physics
·
2018
·
IF 2.147
Wenqiang Su,Ping Wang,Zhengyang Cai,Junhe Yang,Xianying Wang
Molybdenum disulfide (MoS 2 ) has shown its promising performance for use as an electrocatalyst for hydrogen evolution reaction (HER). However, it has commonly suffered from limited edge active sites and stagnant conductivity in this regard. Therefore in the present work, with integrating graphene aerogel (GA) supporting and Al ions doping, we report for the first time one-pot hydrothermal synthesis of Al-doped MoS 2 @GA aerogel electrocatalysts with 3D porous network architecture. Vertical MoS 2 ultrathin nanosheets with defect-rich structure are grown on graphene nanosheets at the optimum weight ratio of 5 wt% GA, leading to the enhancement of HER activity. Simultaneously Al doping of 0.77 at% further optimizes the number of exposed active sites and conductivity. The overpotential at a current of 10 mA·cm −2 was successfully reduced to 212 mV with a Tafel slope value down to 41 mV/dec, benefiting from synergistically structural and electronic modulating of MoS 2 . The study thus sheds light on designing and developing high-performance 3D network electrocatalysts for HER reaction.
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2019
·Vol. 25
·期 41
·9710-9720
·
IF 5.16
Dawei Zhao,Tengteng Wu,Yi Zhou
Graphical Photofit : Fabricating a high-performance photocatalyst to efficiently solve serious environmental problems is an urgent affair. A series of MoS 2 /ZnO composites were successfully fabricated through a facile hydrothermal route, leading to a highly efficient MoS 2 /ZnS/ZnO ternary photocatalyst for environmental treatment. Fabricating a high-performance photocatalyst to efficiently solve serious environmental problems is an urgent affair. Herein, a series of MoS 2 /ZnO composites were successfully fabricated through a facile hydrothermal route using Na 2 MoO 4 , (NH 2 ) 2 CS and urchin-like ZnO as precursors. According to the results of XRD and XPS, it was found that ZnS appeared in MoS 2 /ZnO composite; meanwhile, the content was positively correlated with the weight of the precursor (NH 2 ) 2 CS. It should be noted that the morphology and the metallic phase content of MoS 2 grown in situ on the surface of ZnO were affected by the molar ratio of Na 2 MoO 4 and ZnO. Benefiting from the special dual II heterojunctions of MoS 2 /ZnS/ZnO ternary composite, the material exhibited excellent charge separation and transfer performances. In the photocatalytic measurements, the MoS 2 /ZnS/ZnO (Na 2 MoO 4 :ZnO 1:2 MZ2) composite not only exhibits excellent photocatalytic Cr VI reduction activity of 42.3×10 −3 min −1 , but also displays remarkable adsorption performance (nearly 32.1 %) for Cr 2 . In addition, the ternary composite shows dominant photocatalytic Cr VI reduction activities compared to other photocatalysts. This work provides a high-efficient MoS 2 /ZnS/ZnO ternary photocatalyst for environmental treatment.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）