CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Jingdong Li,Arthur Listwan,Jianxing Liang,Feng Shi,Kan Li,Jinping Jia
In this work, defect-rich 1 T-MoS 2 nanosheets are successfully synthesized by solvothermal method with acetic acid as the templating agent. It is found that changing the concentration of acetic acid can regulate the proportion of 1 T phase and affect the activity of hydrogen evolution. Under the optimum concentration of acetic acid, the overpotential is as low as 136 mV at the current density of 10 mA cm −2 with a Tafel slope at only 45 mV dec −1 , which shows an attractive potential for the development of electrocatalytic hydrogen evolution. In addition, the addition of acetic acid prevents the agglomeration of 1 T-MoS 2 and thus increases the stability of electrode materials, which is conducive to the long-term hydrogen evolution reaction and cost control. Most importantly, according to comparing several small molecular carboxylic acids, the probable formation mechanism of 1 T-MoS 2 nanosheets is proposed.
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ANALYTICAL BIOCHEMISTRY
·
2020
·
IF 2.877
Zui Tao,Liting Wei,Shijia Wu,Nuo Duan,Xiang Li,Zhouping Wang
In this work, a colorimetric aptamer-based method for detection of cadmium using gold nanoparticles modified MoS 2 nanocomposites as enzyme mimic is established. In short, biotinylated Cd 2+ aptamers are immobilized by biotin-avidin binding on the bottoms of the microplate, the complementary strands of Cd 2+ aptamers are connected to the Au–MoS 2 nanocomposites which have the function of enhanced peroxidase-like activity. The csDNA-Au-MoS 2 signal probe and target Cd 2+ compete for binding Cd 2+ aptamer , the color change can be observed by addition of chromogenic substrate, thereby realizing visual detection of Cd 2+ . The absorbance of the solution at 450 nm has a clear linear relationship with the Cd 2+ concentration. The linear range is 1–500 ng/mL, and the limit of detection is 0.7 ng/mL. The assay was used to test white wine samples, the results are consistent with those of atomic absorption spectrometry ; which prove that this method can be used for detection of Cd 2+ in real samples.
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JOURNAL OF NANOPARTICLE RESEARCH
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2020
·Vol. 22
·期 11
·1-12
·
IF 2.132
Wang Linjuan,Zan Ling
MoS 2 -modified In 2 S 3 ( x wt.%MoS 2 -In 2 S 3 ) samples (0 ≤ x ≤ 20) were fabricated through a facile one-pot hydrothermal process. All In 2 S 3 samples modified by MoS 2 deliver an excellent Cr 6+ removal ability under visible-NIR-light-driven, and 5% MoS 2 -In 2 S 3 can reduce 20 mg/L Cr 6+ solution completely within 30 min with a trace photocatalyst concentration (0.27 mg/mL) which is 3.2-hold higher than that of single In 2 S 3 . Further investigations demonstrate that the loaded MoS 2 can not only enhance the absorption of light scope but also promote the interfacial electron transfer from In 2 S 3 to MoS 2 and then to Cr 6+ , thus greatly improving the Cr 6+ removal ability. ESR shows that the modifying of MoS 2 can accelerate the transformation of electrons from the In 2 S 3 to MoS 2 which results in that the intensity of O 2 − • significantly increased. PL, photocurrent, and EIS further identified that the modification of MoS 2 can greatly improve the charge carrier separation efficiency. The fabricated MoS 2 -In 2 S 3 samples also exhibit characteristic features such as stable and reducing Cr 6+ in the weak alkaline environment for the first time, which could always be a great challenge for wastewater purification in alkaline condition.
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高影响因子
LANGMUIR
·
2020
·
IF 3.557
Qicheng Zhang,Danyun Xu,Junmei Liang,Qianqian Lin,Wenchao Peng,Yang Li,Fengbao Zhang,Xiaobin Fan
Hydrodeoxygenation (HDO) of bio-oil is a crucial step for improving the bio-fuel quality, but developing highly dispersed Pt-based catalysts with high selectivity for target alkanes remains a great challenge. This study presents a fast surfactant-free method to prepare the MoS2-supported Pt catalyst for HDO. Ultrafine Pt nanoparticles with sizes of <5 nm can be readily grown on chemically exfoliated MoS2 nanosheets (NSs) via the direct microwave-assisted thermal reduction. The obtained Pt NPs/MoS2 composites show excellent catalytic performance in the conversion of palmitic acid, and the best selectivity (also the yield) of hexadecane and pentadecane is 80.56 and 19.43%, respectively.
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高影响因子
BIOMATERIALS
·
2020
·
IF 10.317
Fan Jiang,Binbin Ding,Shuang Liang,Yajie Zhao,Ziyong Cheng,Bengang Xing,Ping'an Ma,Jun Lin
Rational design of biocompatible nanoplatforms simultaneously realizing multimodal imaging and therapeutic functions is meaningful to cancer treatment. Herein, the MoS 2 –CuO heteronanocomposites are designed by integrating semiconductor CuO and flower-like MoS 2 via a two-step hydrothermal method . After loading bovine serum albumin (BSA) and immunoadjuvant imiquimod (R837), the obtained MoS 2 –CuO@BSA/R837 (MCBR) nanoplatforms realize the excellent computed tomography/infrared thermal/magnetic resonance multi-mode bioimaging as well as significantly enhanced antitumor efficacy of synergetic photothermal therapy (PTT)/chemodynamic therapy (CDT)/immunotherapy. In this nanoplatform, the semiconductor CuO exhibits peroxidase-like activity, which can react with over-expressed H 2 O 2 in tumor microenvironment (TME) to generate OH for CDT via Haber-Weiss and Fenton-like reactions. And this process can be further accelerated by the generated heat of MoS 2 under 808 nm laser irradiation . More importantly, the obtained multifunctional MCBR nanoplatforms under near-infrared (NIR) irradiation would destroy tumor cells to generate tumor associated antigens (TAAs), which combine with R837 as an adjuvant to trigger strong antitumor immune responses for effectively eliminating primary tumors and metastatic tumors.
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Sustainable Energy & Fuels
·
2020
·Vol. 4
·期 6
·2869-2874
·
IF 5.503
Jingyang Tian,Jiaxin Li,Anlin Feng,Xinran Han,Yuancai Lv,Mingyang Ma,Chong Lin
Current research on MoS2/graphene hybrids for the hydrogen evolution reaction (HER) reveals that there is still a huge challenge due to restacking and the scarcity of active sites. In this work, ultramicro MoS2 nanosheets with good dispersion and rich active sites are vertically grown on graphene via a self-limited growth strategy (S–MoS2). Moreover, carbon nanotube (CNT) scaffolds can effectively limit the restacking of graphene and MoS2, accelerating the transport of electrons and electrolytes. The synergism among the multi-function structures and composition control can improve the electrochemical HER activity. The obtained S–MoS2/rGO/CNTs exhibits a low overpotential of 159 mV (vs. RHE) at 10 mA cm−2 and a small Tafel slope of 85 mV dec−1 in 0.5 M H2SO4. Moreover, the S–MoS2/rGO/CNTs shows excellent electrochemical durability at 10 mA cm−2 for 18 h. This work supplies a fresh strategy to design high-performance and cost-effective MoS2-based catalysts for the HER.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2020
·Vol. 31
·期 9
·6690-6697
·
IF 2.22
Liu Xingbin,Meng Fanming,Yu Bo,Wu Hao
The flower-like CeO 2 /MoS 2 heterojunction was composed by self-assembly of MoS 2 nanoflowers and ultrafine CeO 2 nanoparticles through high-temperature nitrogen annealing. The crystal structure, morphology, specific surface area, chemical state, and optical properties of flower-like CeO 2 /MoS 2 heterostructure material were analyzed by XRD, SEM, (HR) TEM, BET, XPS, UV–Vis, and PL characterization methods. Flower-like CeO 2 /MoS 2 heterostructure material has a large specific surface area and strong adsorption capacity. In the photodegradation of methyl orange, the 20% CeO 2 /MoS 2 material has the best photocatalytic performance, the degradation efficiency of 20% CeO 2 –MoS 2 reaches 96.1% in 90 min and the reaction rate constant ( k ) is 0.0325 min −1 , far exceeding the single-component MoS 2 and single-component CeO 2 . After detailed analysis, we know that the large specific surface area, excellent visible light absorption, and rapid separation of electron–hole pairs help to effectively improve photocatalytic efficiency.
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Materials Advances
·
2020
·Vol. 1
·期 4
·760-766
·
IF 0
Pin Song,Jun Di,Haiping Chen,Sirui Zhao,Cao Wu,Xun Cao,Meiling Wang,Jun Xiong,Xinli Ye
Three-dimensional (3D) aerogels have attracted more and more attention in oil–water separation, due to their advantages of low density, high porosity, and large specific surface area. However, their application is greatly limited due to their hydrophilic and low adsorption properties. In this work, we report a 3D MoS2–polyvinylpyrrolidone (PVP) aerogel, prepared by a freeze-drying method, where PVP was used as a skeleton to support the aerogel. As a surfactant, PVP can easily attach to the surface of MoS2 nanosheets and facilitate the interconnection between nanosheets. The 3D MoS2–PVP aerogel exhibits low density, high porosity, good hydrophobicity, and excellent adsorption capacity (195–649 times). Moreover, after 30 cycles, the structure of the 3D MoS2–PVP aerogel is well kept and the adsorption capacity is still retained, at 93.5% and 92.9%, by squeezing and distillation, respectively. Therefore, the obtained 3D MoS2–PVP aerogel is a promising adsorption material and has great practical application potential in oil–water separation.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2021
·
IF 3.927
Mengna Feng,Deyu Ma,Xuanrong Chen,Pan Wang,Jing Lin
Polymer-based dielectric composites are potential substitute dielectrics for organic thin film capacitors. In this work, the exfoliated molybdenum disulfide (MoS 2 ) was functionalized by mussel-inspired poly(dopamine) (PDA) to form core-shell structured composites (MoS 2 @PDA) under easy-handling and eco-friendly conditions, and then as filler incorporated into poly(arylene ether nitrile) (PEN) matrix. The interfacial interaction and dispersion of MoS 2 @PDA in PEN matrix were improved by the strong adhesion of PDA interlayer to exfoliated MoS 2 , π-π conjugation and hydrogen bond interactions, which formed by the polar nitrile group of PEN and catechol groups of PDA. Therefore, the PEN/MoS 2 @PDA composite films exhibited enhanced dielectric constant, synchronously maintaining better flexibility, thermal stability and the same level of dielectric loss with PEN. Particularly, the addition of 20 wt% MoS 2 @PDA into PEN matrix leaded to substantial growth of dielectric constant up to 12.9 at 1 kHz, while the PEN matrix was just 4.2. Meanwhile, the dielectric composites maintained relatively low dielectric loss of 0.022 at 1 kHz, which was ascribed to the improved compatibility and interfacial interaction between filler and PEN. All in all, a eco-friendly and easy-handling strategy was provided to tune the dielectric constant and dielectric loss of semiconductor/polymer composites, which has great potential to promote the development of dielectric in the fields of organic thin film capacitors.
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APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Chenhao Sun,Fangqin Li,Jianxing Ren,Jiang Wu,Guanjun Wang,Linfeng Chen
Exploring low-cost and earth-abundant photocatalysts to efficiently release H 2 from wastewater is an appealing solution for global energy and environmental issues. Here, we successfully prepared flower-like 1T/2H-MoS 2 -decorated g-C 3 N 4 (thiourea)/g-C 3 N 4 (urea) (denoted as CNT/CNU) isotype heterojunction photocatalysts via a facile ultrasonic dispersion method and researched the photocatalytic H 2 generation and pollutant degradation performance in oxalic acid (OA) simulated wastewater. The results displayed that 20% 1T/2H-MoS 2 @CNT/CNU sample exhibited the highest photoreactivity, and the H 2 release rate was 1563.32 μmolg -1 h −1 , which was about 96 times higher than the CNT/CNU. Meanwhile, it also showed the highest total organic carbon (TOC) removal rate of 67.5%. The increased photoreactivity of nanocomposites can be ascribed to the double-interface system to effectually improve the separation of photoinduced charges. Additionally, the experimental results further confirmed that the loading of flower-like 1T/2H-MoS 2 could provide abundant active sites as well as expand the visible-light absorption range. Significantly, photoelectrochemistry measurements and density functional theory (DFT) calculations also confirmed that 1T/2H-MoS 2 cocatalysts accelerated the charge migration. On this basis, the mechanism of 1T/2H-MoS 2 @CNT/CNU promoting hydrogen production and synergistic OA degradation was proposed. This research presents a prospective idea for the utilization of waste water and the simultaneous production of clean energy.
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CHEMOSPHERE
·
2021
·
IF 7.086
Junfei Liu,Hai Lin,Yingbo Dong,Yinhai He,Chenjing Liu
In this study, MoS 2 @Z photocatalysts were synthesized by combining ultrasonic and hydrothermal methods, and used for the degradation of tetracycline . The structure characteristics and photocatalytic degradation mechanism of photocatalysts were also systematically investigated. The obtained MoS 2 @Z-5 exhibits the highest photo-degradation efficiency of tetracycline (87.23%), which is 3.58 times more than alkali-modified zeolite (24.34%) and 1.80 times more than pure MoS 2 (48.53%). Furthermore, the MoS 2 @Z-5 showed significant stability in three times photocatalytic recycles and the removal efficiency only decrease by 9.03%. Crystal structure and micromorphology analysis show modified zeolite with collapsed structure can regulate the morphology of nano-MoS 2 and make MoS 2 appear fault structure, which can expose more active sites. In addition, low Si/Al ratio zeolite increases the hydrophilia of MoS 2 @Z-5. Reactive-species-trapping experiments show that the hole is the main reactive oxidizing species. The superior photo-degradation efficiency is mainly attributed to outstanding hydrophilia, exposure of the edge active sites, and efficient separation of photogenerated charge and holes. A possible photocatalytic mechanism and degradation pathways of tetracycline were proposed. The results indicate that MoS 2 @Z-5 may become an efficient, stable, and promising photocatalyst in tetracycline wastewater treatment .
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JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Jiangtao Dong,Wang Chen,Dunzhong Qin,Yuxia Chen,Jun Li,Chen Wang,Yeqing Yu,Jianguo Feng,Xuezhong Du
Targeted delivery of pesticides towards pests and pathogens can significantly improve the bioavailability and efficacy of pesticides and minimize the impact on the environment. Cyclodextrin polymer (CDP)-valved, benzimidazole functionalized, MoS 2 -embedded mesoporous silica (MoS 2 @ [email protected] ) nanopesticides were constructed toward hierarchical biological targets of pests, pathogens, and foliage. The splash and bounce of the aqueous droplets containing MoS 2 @ [email protected] nanoparticles in the presence of Aersosol OT on superhydrophobic surfaces were well inhibited available for excellent wetting to prevent pesticides from losing to the environment. The multivalent supramolecular nanovalves between CDP and the functionalized benzimidazole moieties could be activated for the controlled release of pesticides in the cases of low pH and α-amylase. It is the first time to report the foliage-triggered controlled release of pesticides, owing to the competitive binding of epicuticular wax components to CDP. Furthermore, thermogenic MoS 2 cores triggered the controlled release of pesticides under irradiation of near infrared light. The fungicidal efficacies of the stimuli-responsive nanopesticides against pathogenic fungi Rhizoctonia solani and Fusarium graminearum were demonstrated. It is clear that the smart nanopesticides could realize the controlled release of pesticides toward hierarchical biological targets for enhanced pesticide bioavailability and efficacy via the multidimensional stimuli of pH, α-amylase, epicuticular waxes, and sunlight.
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