INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Sanmei Liu,Yanping Yang,Weiming Xiao,Siyao Xia,Caiju Jin,Wen Wang,Shengchen Li,Minli Zhong,Shuhua Wang,Chao Chen
Photocatalytic technology is a unique method of treating energy crisis and environmental concern. Herein, Metal-organic frameworks (MOFs) were employed to prepare a series of visible light responsive MoS 2 /CdS heterojunction photocatalysts by facile low-temperature hydrothermal sulfurization . The structural analysis revealed that the prepared MoS 2 /CdS heterojunction exhibited highly porous structure and the intimate interface was formed between the MoS 2 and CdS. For these structure features, the charge separation and transfer were significantly improved, and the MoS 2 /CdS heterojunction presented efficient photocatalytic activity towards hydrogen evolution and degradation of rhodamine B (RhB) and tetracycline hydrochloride (TC). The highest H 2 evolution rate (3318 μmol h −1 g −1 ) was found at the 5 wt%-MoS 2 /CdS, which were 10 times and 6 times of pristine MoS 2 and CdS, respectively. In particular, the 5 wt%-MoS 2 /CdS can also remove 95% RhB and 90% TC within 40 min. Moreover, the MoS 2 /CdS heterojunction showed good photocatalytic stability for hydrogen evolution and degradation of RhB and TC. Furthermore, the radical trapping experiment revealed that the photogenerated · O 2 − played critical role in RhB degradation and the hole (h + ) and · O 2 − were essential for TC degradation. The work will provide a guidance for rational design and facile preparation of photocatalyst for the visible light-driven hydrogen evolution and elimination of organic pollutants.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 15
·1-12
·
IF 2.8
Pan Yusong,Zhu Yuan,Wang Yuanqing,Huang Run,Pan Chengling
Based on the strong capability of transition metal ions for peroxymonosulfate (PMS) activation and highly affinity of MoS 2 towards PMS, thus decorating MoS 2 with transition metal ions would efficiently activate PMS for degradation of organic pollutants. In this work, Co/Fe co-doped MoS 2 catalyst were synthesized by simple chemical method. The prepared Co/Fe co-doped MoS 2 catalyst displayed excellent catalytic activity for organic pollutant degradation. The removal efficiency of RhB and MB is 99% in 6 min and 98% in 15 min under PMS system, respectively. Both the capture experiment and EPR results verified that 1 O 2 played an important role in the organic pollutant degradation process in PMS system. The catalytic mechanism revealed that the synergistic effect between Mo ion and Co/Fe ions is beneficial for boosting the catalytic properties of Co/Fe co-doped MoS 2 catalyst. The cycle experiments confirmed that Co/Fe co-doped MoS 2 possesses excellent chemical stability and re-usability.
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Yuan Su,Zilian Jiang,Yahui Wang,Hongfang Zhang
The interesting adsorption affinity of two-dimensional nanosheets to single stranded over double stranded nucleic acids have stimulated the exploration of these materials in biosensing. Herein, MoS 2 nanosheets decorated anodic aluminum oxide (AAO) membrane was simply prepared by suction filtration. The MoS 2 /AAO hybrid membrane was initially applied to the electrochemical detection of microRNA using let-7a as the model. When let-7a was incubated with its complementary DNA , double stranded DNA-RNA formed and which displayed weak adsorption capability to the hybrid membrane. And thus the steric effect combining the electrostatic repulsion of the backbone phosphate of nucleic acids for [Fe(CN) 6 ] 3− transport across the hybrid membrane varied with the concentration of let-7a. In this way, a label-free electrochemical detection method for microRNA was established by monitoring the change of the redox current of [Fe(CN) 6 ] 3− . To further improve the detection sensitivity of the method, we proposed two separate strategies focusing on the amplification of the target-induced steric hindrance with DNA nanostructure and the magnification of the electrode sensitivity for [Fe(CN) 6 ] 3− by electrode modification. By using the two strategies, the hybrid membrane based-detection method exhibited broad linear range, low detection limit and good selectivity as well as reproducibility. Therefore, this study provided a proof-of-concept for the application of two-dimensional material to nucleic acids detection.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Jianqing Ma,Nanzhengfang Jia,Huixia Jin,Sijing Yao,Kefeng Zhang,Yin Kai,Wenliang Wu,Yuezhong Wen
The removal of Cr(VI) from wastewater still faces many challenges. This study reports on chitosan-induced synthesis of few-layer MoS 2 /Fe-doped biochar (Mo-Fe 0.5 -CS) with dual applications in Cr(VI) removal. Using chitosan as a soft template, the MoS 2 in the composite had only about 3 layers with an interlayer spacing greater than that of pure MoS 2 , while Fe was embedded in the carbon skeleton in the form of 6-coordination with O/N. The Mo-Fe 0.5 -CS composite showed high affinity for Cr(VI), with rapid adsorption reaching 100% removal within 15 min for a single solution of Cr(VI). It follows the Langmuir isotherm model with a maximum adsorption capacity of up to 180 mg/g. Furthermore, the Mo-Fe 0.5 -CS composite demonstrated catalytic activity for Fenton-like reactions, which allowed for the simultaneous removal of organic pollutants and Cr(VI). In a mixture solution of Cr(VI) and Acid Red 73 (AR73), the removal efficiencies using Mo-Fe 0.5 -CS and H 2 O 2 in 30 min were 99.7% and 96.6%, respectively. The MoS 2 acted as a cocatalyst to improve the reduction of Fe(III), and the catalysis of Cr(VI) also contributed to the removal of AR73 to a certain extent. Even at pH 10, the system was effective due to the 1 O 2 produced in the reaction and the acidic microenvironment constructed by unsaturated S atoms. These findings provide insights into the effective removal and utilization of Cr(VI) in wastewater treatment .
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Xin Gao,Ting Wang,Kai Sun,Yujun Fu,Ying Wu,Dequan Liu,Deyan He
The establishment of three-dimensional structures, carbon coating, and proper defects is an effective strategy to improve electrochemical performance of molybdenum sulfide. In this work, carbon-coated MoS2-ZnS (MoS2-ZnS@C) heterostructures were constructed by treating the MOF precursor with a one-step sulfurization/carbonization strategy. The MoS2-ZnS@C heterostructures not only introduce abundant C–S–C and C–N bonds which contribute to ion storage with enhancive active sites but also effectively accelerate ion diffusion and reaction kinetics. The corresponding reaction mechanism was revealed via XRD and HR-TEM tests. The anode of MoS2-ZnS@C heterostructures shows outstanding rate capability (309 mAh g–1 at 10 A g–1) and long cycle stability (343 mAh g–1 after 1200 cycles at 5 A g–1) in sodium-ion batteries (SIBs). Meantime, the MoS2-ZnS@C heterostructure anode also exhibits enhanced potassium storage performances, delivering a superior rate capability (80 mAh g–1 at 5 A g–1) and superior long cycle performance (297 mAh g–1 after 100 cycles at 0.5 A g–1). In addition, a high specific capacity of 270 mAh g–1 is achieved at 1 A g–1 in a full cell made up of MoS2-ZnS@C/ether-based electrolyte/Na3V2(PO4)3. The construction of heterostructures for improving the electrochemical performance can also be applicable to other battery material fields.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Hongjiu Zhu,Qiulin Li,Heng Zhang,Jiawang Liu,Juan Li,Zhuo Zou,Tao Hu,Chang Ming Li
A green process to produce an efficient and inexpensive electrocatalyst toward hydrogen evolution reaction (HER) is of importance for hydrogen energy. Here, an efficient HER electrocatalyst is made by electrochemically depositing Co2P quantum dots (QDs) on MoS2-carbon cloth (Co2P QDs/MoS2-CC). Due to the MoS2 porous structure, ∼3 nm Co2P QDs uniformly deposit on MoS2. The produced unique 3D-structured Co2P QDs/MoS2-CC not only prevents an agglomeration of the active material and improves the diffusion rate of H2 but also renders large accessible surface area and hierarchical pores for high-density reaction sites and enhanced mass transport rate. Experimental results and theoretical analysis of this unique heterostructure indicate that the evolution process of hydrogen is dominated by proton adsorption, and the introduction of sufficient edge active sites can significantly promote the HER. As a consequence, the hierarchical Co2P QDs/MoS2-CC electrocatalyst affords an ultra-low overpotential (41 mV at a current density of 10 mA cm–2) that ranks the best among all reported MoS2 HER catalysts and exhibits excellent durability in 1 M KOH solutions, thus holding great promise for the practical application while shedding on fundamentals to nanoengineering an efficient electrocatalyst.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Ruihan Du,Kunkun Xiao,Shuiyuan He,Yang Wang,Chunli Kang
In this study, Bi 4 Ti 3 O 12 nanosheets and flower-like MoS 2 were synthesized by hydrothermal method and compounded into p-n heterojunctions with 2 D– 2 D structure. The stable p-n heterojunctions exhibit excellent visible-light-driven catalytic activity through effective electron/hole (e - /h + ) separation, which generates a built-in electric field between the two components, accelerates the separation efficiency of photogenerated charges between the materials, and reduces the photogenerated electron-hole complexation efficiency. The methylene blue (MB) was degraded under simulated sunlight conditions, and the removal efficiency of MB at an initial concentration of 10 mg/L could reach 91.1% within 270 min. HRTEM and microstructural study revealed microscopic close interaction between the two phases, which can shorten the transport path of photogenerated electron-hole pairs, and optical measurement studies show a significant improvement in visible light absorption and charge carrier separation due to the formation of heterojunctions. Free radical quenching experiments and electron paramagnetic resonance (EPR) showed that the main active substances are·OH and·O 2 - , and photogenerated h + is also involved in the photocatalytic reaction process. The system also shows good degradation efficiency in different water matrices, five-cycle experiments, and good structural stability elucidate its potential application in degrading emerging pollutants for water purification.
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Environmental Science
·
2023
·
IF 4.6
He Yutian,Wang Xinzhi,Ke Yuhan,Qiu Yiquan,Zhou Qiao,Shen Zheyu,Xie Han,Li Yingqiang,Huang Mingzhi
Introduction: Dimethyl phthalate (DMP) which has been widely detected in water is neurotoxic to humans and should be effectively eliminated. Persulfate-based advanced oxidation processes are considered to be reliable methods aiming at emerging contaminants degradation, while an efficient catalyst is urgently needed for the activation of the reaction. As a typical 2D material, 1T-MoS2 is expected to be applied to the activation of persulfate owing to its abundant active sites and excellent electrical conductivity. In practical applications, 1T-MoS2 has the phenomenon of reunion which affects the exposure of its catalytic sites.Methods: Therefore, in this study, we used waste cow manure as a raw material to prepare biochar and achieved high exposure of 1T-MoS2 activation sites by loading 1T-MoS2 onto the surface of cow manure biochar through hydrothermal synthesis. The prepared composite catalytic material CMB@1T-MoS2 was used to activate PMS for the degradation of DMP.Results: It was found that CMB@1T-MoS2 has better effect than CMB or 1T-MoS2 alone for the degradation of DMP, reaching 77.65% at pH = 3. Under alkaline conditions, the degradation rate of DMP was reduced due to the inhibition of the catalytic process. Among the different coexisting anions, HCO-3 interfered and inhibited the degradation process the most, leading to the lowest degradation rate of DMP with 42.45%.Discussion: The quenching experiments and EPR analysis showed that SO-4• and •OH were the main ROS in the CMB@1T-MoS2/PMS process. This study promotes the resourceful use of cow manure and is expected to provide a novel persulfate-based advanced oxidation process catalyzed by CMB@1T-MoS2 for the elimination of DMP in an aqueous environment.
✓ 已验证
产品关联
DOI
高影响因子
ChemElectroChem
·
2019
·Vol. 6
·期 13
·3393-3400
·
IF 3.975
Shan Gong,Guangyu Zhao,Naiqing Zhang,Kening Sun
Graphical An upscaling opportunity : Polyethyleneimine (PEI) modified GO sheets (PEI−GO) absorb the ammonium thiomolybdate on the surface via electrostatic attraction, accompanying with the layer-by-layer assembling in the solution. The subsequent annealing process creates a sheet-on-sheet structure with unilaminar MoS 2 nanosheets lie on the GR sheets. Two-dimensional (2D) heterostructured materials, combining the desired advantages of individual 2D materials and eliminating the associated shortcomings, have inspired great interest in electrochemical energy storage applications. But searching a highly efficient and practical method for preparing 2D heterostructures as electrode materials is still challenging. Herein, a 2D MoS 2 /graphene (GR) heterostructure is synthesized through a facile and accessible self-assembly method, which includes adsorbing ammonium thiomolybdate onto graphene oxide (GO) surface via electrostatic attraction and subsequently annealing the precursor to heterostructure. A high loading amount (86.2 %) of unilaminar MoS 2 nanosheets lie on the GR sheets forming a face-to-face structure, and the MoS 2 nanosheets exhibit a largely expanded interlayer spacing (1.0–1.2 nm) resulting from the alternately stacked structure during self-assembly process. As a Li-ion intercalation host, this unique MoS 2 /GR heterostructure exhibits pseudocapacitance-dominated characteristics with superior kinetic performances and extremely high structural stability. These characteristics afford MoS 2 /GR heterostructure remarkable rate capability (155.6 mAh g −1 at 4 A g −1 ; 119.3 mAh g −1 at 16 A g −1 ) and a durable reversible capacity (over 5000 cycles). This method is suitable for mass production of MoS 2 /GR heterostructure and paves a way for utilizing 2D heterostructured materials in Li-ion or other metal ion batteries.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 6
·B498
·
IF 3.12
Xintong Geng,Jing Bao,Ting Huang,Xiaojing Wang,Changjun Hou,Jingzhou Hou,Mickey Samalo,Mei Yang,Danqun Huo
Guanine (G) and adenine (A) are two important components of nucleic acid and some small molecules in an organism. In this paper, we developed a new and convenient biosensor for the simultaneous determination of G and A based on overoxidized polypyrrole/multi- walled carbon nanotube and molybdenum disulfide modified glassy carbon electrode (PPyox/ MWNTs-MoS2/GCE). The composite material exhibited remarkable electro-catalytic properties toward the oxidation of G and A due to its large surface area and fast electron transfer. The oxidation peak positions of G and A were at 0.73 V and 1.03 V, respectively, which allowed simultaneous detection of the two substances in coexistence solution. The designed biosensor exhibited linear responses to G and A both in the ranges 5–30 μM and 30–120 μM, with detection limits (S/N = 3) of 1.6 μM (G) and 1.7 μM (A), respectively. Moreover, interferences from some coexisting electro-active species including inorganic ions, glucose, glycine and citric acid were nearly negligible. Further, the sensing strategy was successfully used for the detection of G and A in real samples with satisfactory results, indicating a potential application for the simultaneous electrochemical detection of G and A.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Peng Zhang,Ji-Lai Gong,Guang-Ming Zeng,Biao Song,WeiCheng Cao,Hong-Yu Liu,Shuang-Yan Huan,Ping Peng
Graphene oxide-based nanofiltration membrane, have attracted tremendous interest due to the highly permeability and excellent rejection behavior. Here we show that a novel low-pressure nanofiltration membranes (LPMs) comprising MoS 2 nano-supporting spacer among the graphene oxide (GO) layers, which were fabricated by forward pressure-assisted assembly and heat-treatment. The resultant GO/MoS 2 LPMs exhibited a pure water permeability about 10.2 ± 1.68 L/(m 2 ·h·bar) at low pressure (2 bar), which was much higher ( about 13.6 times) than that of pristine GO membrane (~0.75 L/(m 2 h bar)). Meanwhile, high rejection to different charged dyes ( ≥ 95%) and moderate rejection for salts (43.2%, 65.2%, 26.5% and 24.3% for NaCl, Na 2 SO 4 , MgCl 2 and MgSO 4 , respectively) was remained. The satisfied filtration performance was attributed to the loose interlayer-structure of composite membrane and the cooperative effect of Gibbs-Donnan exclusion mechanism and steric hindrance. In addition, the GO/MoS 2 LPMs presented satisfied stability and antifouling properties. Experimental results and molecular dynamics simulation results demonstrated that the increase of vertical distance between GO sheets by introducing the MoS 2 nanoparticles could accelerate the water transport in the channels. This paper was not only provided a new design idea for adjusting the channel size of GO membrane, but also gave a promise of GO-based membrane for practical wastewater treatment and purification.
✓ 已验证
产品关联
DOI
高影响因子
Micro & Nano Letters
·
2019
·Vol. 14
·期 8
·835-839
·
IF 0.975
Jingqi Shang,Enyong Ding,Feng Xue,Xingrong Zeng,Jiewei Chen,Ning Xu,Nianchun Zhang,Qiushi Wei
This work report a facile, rapid and efficient approach to prepare high-concentration graphene and MoS 2 nanosheets through the liquid phase exfoliation of bulk materials with the method of high-pressure homogenisation assisted by carboxyl methyl cellulose. The few-layer graphene and MoS 2 nanosheets dispersions are prepared under 100 MPa for 10 min at high concentrations up to 1.45 and 0.28 mg/ml. The two nanodispersions could be applied to prepare the polyvinyl alcohol composite with well dispersibility and thermal stability.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）