JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Mian Gao,Zhitao Shen,Gentian Yue,Chen Dong,Jihuai Wu,Yueyue Gao,Furui Tan
Developing a synthesis method for large-scale preparation of efficient and economical non noble metal counter electrode (CE) electrocatalytic materials with good catalytic ability and stability is an ideal choice for the commercialization of dye-sensitized solar cells (DSSCs). In this paper, a novel micro-nanostructured composite of CE was prepared by fixing the In 4 SnS 8 and MoS 2 on carbon nanotubes (CNTs) and using a one-step hydrothermal strategy. The devices based on the In 4 SnS 8 @MoS 2 @CNTs composite CE performs high power conversion efficiency of 8.72%, far more than that of the device with the control ones (7.57%). The In 4 SnS 8 @MoS 2 composite were homogeneously distributed on the CNTs surface to form a new In 4 SnS 8 @MoS 2 @CNTs composite network heterojunction . This distinctive porous structure can provide greater contact area and electronic transmission channel to ensure fast charge transport of electrolyte. The prefect electrochemical properties of the In 4 SnS 8 @MoS 2 @CNTs CE for the I − /I 3 − electrolyte also have been demonstrated by a series of electrochemical tests. As a result, it can be considered that the In 4 SnS 8 @MoS 2 @CNTs will replace the Pt CE and has broad application prospects in DSSCs.
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COMPOSITES PART B-ENGINEERING
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2022
·
IF 11.322
Zhengyan Chen,Maoyu Zhang,Zhengzheng Guo,Hongtao Chen,Hongxia Yan,Fang Ren,Yanling Jin,Zhenfeng Sun,Penggang Ren
Despite two-dimensional (2D) layered MoS 2 and newly emerging lamellar MXene providing great potential in lubricity, the mechanical and tribological performance of their hybrids in polymeric composites has been rarely discussed. Herein, the Ti 3 C 2 T x MXene/MoS 2 hybrids were successfully prepared by a hydrothermal method , and a novel hyperbranched polysiloxane (HBPSi) terminated by amino groups was synthesized by a one-pot polycondensation reaction. The mechanical and tribological properties of bismaleimide (BMI) composites as well as their wear mechanisms were systematically evaluated using HBPSi as reinforced phase and MXene/MoS 2 as lubrication additive. The results show that the addition of HBPSi and MXene/MoS 2 hybrids dramatically improved mechanical strengths and tribological performance . Specifically, the 8 wt% HBPSi and 0.6 wt% MXene/MoS 2 hybrid filler enhanced impact and flexural strengths by 85% and 42%, and decreased the frictional coefficient and wear rate by 69% and 88%, respectively, with neat BMI resin as a comparison. The splendid mechanical and tribological performance is ascribed to the synergistic effect of “soft” toughening HBPSi and “hard” lubricating MXene/MoS 2 , the good dispersion of hybrid filler , and the formed protective tribo-film. This work paves a way for the design and application of novel high-performance lubrication additive in the polymeric matrix .
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Lei Ding,Fei Qi,Yanfei Li,Jian Lin,Yang Su,Yihan Song,Lijing Wang,Haizhu Sun,Cuiyan Tong
The high photogenerated carrier recombination rate and the low visible light utilization limit the development of graphitic carbon nitride (CN) in industrial photocatalytic H 2 generation. Herein, 1T-phase MoS 2 nanoparticles with high conductivity and more active sites are in-situ grown on B-doped carbon nitride (CNB) nanosheets through a one-step hydrothermal method. The doping of boron element effectively improves the harvesting visible light ability by tuning the energy gap, while the introduction of 1T-phase MoS 2 successfully increases the carrier transfer rate by suppressing charge trapping. An optimized H 2 production activity of 5334 μmol h −1 g −1 with the apparent quantum efficiency of 10.2% is achieved by 1T-MoS 2 /CNB sample, which is 167 times higher than that of pure CN. The mechanism is systematically illustrated by the combination of DFT calculations and transient absorption measurements. This work provides a new way for the construction of transition metal-derived co-catalysts in photocatalytic hydrogen energy storage.
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高影响因子
Micro & Nano Letters
·
2022
·Vol. 17
·期 6
·125-133
·
IF 0.98
Jian-Jun Shi,Zhe Wang,Yan Wang,Rui-Wen Shu,Ping Yang
A photoelectrochemical sensor has been developed for the detection of the polycyclic aromatic hydrocarbon pollutant benzo [a]pyrene (BaP). An n -butyl lithium intercalation stripping method is applied to prepare tungsten disulphide nanosheets (WS 2 NSs). WS 2 NSs and β-cyclodextrin (β-CD)-modified MoS 2 quantum dots (QDs) are then compounded by hydrogen bonding between the amino and hydroxyl groups. After assembly on an indium tin oxide electrode, the energy level matching and synergistic photoelectric effect between β-CD-MoS 2 QDs and WS 2 NSs reduced the combination of photogenerated electrons and holes and an enhanced photocurrent signal is observed. As a result of the host–guest interaction between β-CD and BaP, BaP could bind to the β-CD-MoS 2 QDs in the nanocomposites, which hinders the electron migration to the electrode and weakened the photocurrent signal. Thus, the trace detection of BaP is realized. The rate of photocurrent change is also related to the BaP concentration from 1 to 20 nmol/L with a detection limit of 0.33 nmol/L. In summary, a highly sensitive and selective photoelectrochemical sensor for the detection of BaP is successfully constructed.
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FOOD CHEMISTRY
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2022
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IF 9.231
Shuang Han,Yuxin Ding,Fu Teng,Aixin Yao,Qiuxue Leng
This study introduces an innovative procedure for the development of a molecularly imprinted electrochemical sensor for ultra-sensitive and specific recognition of butylated hydroxyanisole (BHA). First, a uniquely flower-like molybdenum disulfide/Ag nanoparticle-chitosan (MoS 2 /Ag NPs-CS) composite was prepared and used as a matrix to modify the electrode surface. Then, a layer of BHA-molecularly imprinted polymer was grown on the surface of the modified electrode by electropolymerization, with BHA as template molecule, which improved the specific recognition of the modified electrode to BHA. The MoS 2 /Ag NPs-CS material could not only increase the specific surface area of the electrode, accelerate the electron transport rate and mass transfer, but also promote the recognition of the polymer, so as to increase the current response and improve the performance of the electrochemical sensor. The prepared electrochemical sensor showed a wide linear range for BHA in the range of 1 × 10 −9 -1 × 10 −4 mol/L with a detection limit of 7.9 × 10 −9 mol/L. The recovery of BHA in several foods was from 95% to 103%. The sensor had good reproducibility, stability and excellent selectivity, and was successfully used for the detection of BHA in foods, providing a reliable detection method for sensitive, rapid and selective detection of BHA in complex food samples.
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高影响因子
TALANTA
·
2022
·
IF 6.556
Xiaoli Wang,Junwang Ji,Pengfei Yang,Xinyu Li,Yiquan Pang,Panpan Lu
The detection of cancer markers still has shortages of low sensitivity, time-consuming operation, the use of unstable and expensive antibodies. In this work, a novel Love-mode surface acoustic wave (LSAW) aptasensor with dummy fingers based on the monolayer molybdenum disulfide/gold nanoparticles (monolayer MoS 2 /Au NPs) was developed for the highly sensitive and rapid determination of alpha-fetoprotein (AFP) in serum. Interdigital electrodes (IDTs) with dummy fingers were designed and applied to improve the acoustic characteristic of the LSAW aptasensor. The less energy dissipation and wave-front distortion of the LSAW aptasensor were confirmed by COMSOL simulation and test results. The newly-developed sensing film monolayer MoS 2 /Au NPs/Apt/6-mercaptohexanol (MCH) was applied for the specific detection of AFP and significantly improved the sensitivity of the LSAW aptasensor. The excellent performance of the LSAW aptasensor allowed the sensitive and rapid detection of AFP in serum in the range of 0.01 ⁓ 100 ng/mL with a low detection limit of 4.79 pg/mL. Additionally, the proposed LSAW aptasensor exhibited excellent selectivity , long-term stability, and reproducibility, and could be used to detect other cancer biomarkers.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Tuxiang Guan,Zhisheng Cheng,Zemei Li,Lin Gao,Kelan Yan,Liming Shen,Ningzhong Bao
The intensive growth of smart portable devices has triggered a boom in the research of all-solid-state flexible supercapacitors. However, the unsatisfactory mechanical flexibility and limited energy density still hinder their practical application. Herein, a combination hydrothermal-assisted assemble strategy is proposed to design reduced graphene oxide fiber/MoS2 nanosheet-assembled composite fabrics (rGOFF–MoS2), where the MoS2 nanosheets vertically grow on the surface of rGO fibers through C–O–Mo covalent bonds. The synthesized rGOFF–MoS2 fabrics present an inter-linkage isotropy skeleton, a robust fusing node, an in situ vertical covalent bridge, an adequate pseudocapacitive reactivity, and a large electrochemical active surface (80.1 m2/g), resulting in fast interlaminar conductivity, great ionic migration and adsorption, and outstanding mechanical stability. The as-prepared flexible electrode displays a large capacitance of 330 F/g at 0.1 A/g (1330 mF/cm2 at 1 mA/cm2) and a high stability (95% capacitance retention after 10,000 cycles) in the H2SO4 electrolyte. Additionally, the assembled solid-state flexible supercapacitor presents an energy density of 69.44 μW h/cm2 (0.5 mW/cm2) and an excellent mechanical flexibility, making the rGOFF–MoS2 fabric a highly competitive candidate for practical applications in next-generation wearable/smart electronics.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Zhongsen Yan,Xiaolei Chen,Shulei Bao,Haiqing Chang,Hongliang Liu,Gongduan Fan,Qiankun Wang,Xianzhi Fu,Fangshu Qu,Heng Liang
Intensive energy dependence and membrane fouling are the inherent limitations of membrane distillation (MD) process for the application. Solar energy is promising sustainable energy for both alleviating the energy shortage and activating the Fenton-like reaction for various pollutants degradation. By in situ integrating Fenton-like and photothermal MD processes, the restriction of energy dependence and membrane fouling on the MD process might be effectively liberated. In this study, Co-MoS 2 /CNT was introduced to PTFE membrane modification through vacuum filtration, which simultaneously endowed the membrane with optothermal effect and Fenton-like activation abilities. The membrane was evaluated in a dye wastewater treatment under the irradiation of 1 kW/m 2 light density. Results showed that the degradation degree of RhB can reach 80 % within 1 h on the feed side, while the permeate flux maintains at 2.43 kg/(m 2 ·h) with an initial feed temperature of 35 °C. In addition, the flux of the Co-MoS 2 /CNT/PTFE membrane can be maintained above 95 % after three fouling-cleaning cycles, indicating that the modified membrane has a good self-cleaning performance. This work provides a low carbon option which improving mass transfer effect and fouling control ability for dye wastewater treatment by MD using solar energy.
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Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Yuan Fang,Ai Lu,Dongmin Zhao,Kaihua Su,Zhuoyan Li,Ying Wang,Xing-Can Shen,Kui Liu,Changping Ruan
Effectively eliminating mercury pollution in aqueous solutions remains an onerous task and important environmental challenge for protecting the public health and environment. Herein, we report a facile one-step hydrothermal approach to synthesis widened molybdenum disulfide (W-MoS 2 ) nanosheets/natural cellulose fiber composite (W-MoS 2 /NCF) for highly efficient elimination of Hg(II) from aquatic systems. Benefiting from the synergistic advantages of the intrinsically sulfur-rich characteristic of W-MoS 2 combined with its enlarged interlayer spacing (0.94 nm) that fully exposes the sulfur atoms as binding sites, as well as the vertical immobilization of W-MoS 2 nanosheets on the cellulose fibers that enables the easy accessibility of all the S binding sites, the maximum adsorption capacity of W-MoS 2 /NCF towards Hg(II) was 1206 mg g −1 , implying that almost all the S binding sites were fully utilized for mercury uptake. Moreover, the 3D structure characteristics can not only avoid the self-aggregation of 2D nanosheets , but also benefit the removal, regeneration, and reuse of this composite in practical application by offering convenient operations. In consequence, the W-MoS 2 /NCF outperformed the most of MoS 2 -based composites in terms of mercury removal capacity, utilization efficiency of S, operation convenience, and recyclability . Taken together, the combination of the advantages of its excellent Hg(II) capture performance, facile and scalable synthesis process, the easy availability of raw materials, easy recyclability and reusability endowed the as-prepared W-MoS 2 /NCF with promising potential for being used as a highly effective scavenger to decontaminate Hg(II) contaminated wastewater.
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Biomedical Materials
·
2022
·Vol. 17
·期 4
·045025
·
IF 4.103
Mingchao Jin,Juli Zhu,Zhipeng Meng,Xuesheng Jiang,Zhuo Chen,Juntao Xu,Hongliang Gao,Junkun Zhu,Fengfeng Wu
Titanium dioxide (TiO2), as one of the titanium (Ti)-based implants, holds a promise for a variety of anti-bacterial application in medical research. In the current study, a functional molybdenum disulfide (MoS2)/polydopamine (PDA)-LL-37 coating on titanium dioxide (TiO2) implant was prepared. Anodic oxidation and hydrothermal treatment was given to prepare TiO2 nanotubes-MoS2/PDA-LL-37 (T-M/P-L). The in vitro osteogenic effect of T-M/P-L was evaluated by measuring mesenchymal stem cell (MSC) adhesion, proliferation, alkaline phosphatase (ALP) activity, extracellular matrix (ECM) mineralization, collagen secretion and osteoblast-specific messenger RNAs (mRNAs) expression. The determination on the anti-bacterial ability of T-M/P-L was followed. Furthermore, the ability of T-M/P-L to promote bone formation in vivo was evaluated. Near-infrared (NIR) laser irradiation exposure enabled the T-M/P-L coating-endowed Ti substrates to hold effective anti-bacterial ability. T-M/P-L promoted the adhesion and proliferation of MSCs. In addition, an increase was witnessed regarding the ALP activity, collagen secretion and ECM mineralization, along with the expression of runt-related transcription factor 2, ALP and osteocalcin in the presence of T-M/P-L. Additionally, T-M/P-L could stimulate endothelial cells to secrete vascular endothelial growth factor (VEGF) and promote capillary-like tubule formation. Upon NIR laser irradiation exposure, T-M/P-L not only exhibited efficient in vivo anti-bacterial activity but also facilitated new bone formation. Collectively, T-M/P-L had enhanced anti-bacterial and osteogenic activity under NIR laser irradiation.
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高影响因子
Science China-Chemistry
·
2022
·Vol. 65
·期 9
·1829-1837
·
IF 10.138
Shi Yue,Zhang Dan,Miao Hongfu,Wu Xueke,Wang Zuochao,Zhan Tianrong,Lai Jianping,Wang Lei
Molybdenum disulfide (MoS 2 ) has become a competitive candidate for efficient and economical hydrogen evolution reaction (HER). Compared with 1T-MoS 2 , 2H-MoS 2 possesses exceptional thermodynamic stability but still suffers from low active site density, poor conductivity, and weak hydrogen bonding in the wide pH range. Herein, 2H-MoS 2 nanoflowers with phosphorus doping, sulfur vacancies and crystalline-amorphous heterojunction were synthesized via phosphorus-assisted rapid calcination method. Benefiting from the cooperative interaction of multiple strategies, the prepared 2H-MoS 2 nanoflowers firstly achieve efficient pH-universal HER at high current densities. Experimental results show that in alkaline, acidic, and neutral media, MoS 2 -P2 requires only 332, 302, and 417 mV to drive the current density of 500 mA cm −2 and obtains 932, 1100, and 472 mA cm −2 at the potential of −0.4 V vs. RHE, respectively. Moreover, MoS 2 -P2 shows excellent stability of low and high current density in the full pH range.
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Nano Energy
·
2022
·
IF 19.069
Sin-Yi Pang,Weng-Fu Io,Lok-Wing Wong,Jiong Zhao,Jianhua Hao
Crystal phase modulations in two-dimensional (2D) materials have garnered extensive interest because of their intriguing features and potential applications. Nonetheless, synthesizing some specific phases of metastable transition metal dichalcogenides (TMDs) remains a challenge due to the restricted selectivity under chemical and physical treatments, especially for direct growth of specific phase of TMDs on 2D substrates to form heterostructures . Taking the merits of MXene with tunable atomic vacancies and surface chemistry via surface functionalization , the phase of epitaxially grown TMDs on 2D MXene can be significantly affected. In this work, 1 T′-MoS 2 and 1 T-MoSe 2 were directly grown on electrochemically synthesized MXene under controlled oxidization conditions and selected MXene substrate. Owing to the synergistic effect of TMDs and MXene, the TMDs/MXene heterostructure catalysts exhibit good electrochemical activity under acidic conditions, with a low overpotential of 167 mV at a current density of 10 mA cm −2 . Our work not only demonstrates the distinct chemical characteristic of various MXenes feasible for surface engineering which promotes the direct and in situ growth of phase controlled TMDs on MXene substrates but also displays the high electrochemical activity in TMDs/MXene heterostructure catalysts.
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