SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Tingting Yu,Qingsong Liu,Zhiyuan Zhu,Wenwei Wu,Lifen Liu,Jinlong Zhang,Changfei Gao,Tao Yang
Using a Z-scheme MoS 2 /rGO/Bi 2 S 3 loaded onto carbon felt (CF) as the anode and BiOBr as the cathode in a photocatalytic fuel cell (PFC) was found to be an efficient photocatalytic system for degrading water contaminants such as antibiotics. Some standard analytical techniques, including scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), ultraviolet–visible spectrophotometry (UV–Vis DRS), ultraviolet photoelectron spectroscopy (UPS), electron paramagnetic resonance (EPR), high performance liquid chromatography-mass spectrometry (HPLC-MS) and electrochemical analysis (cyclic voltammetry, CV and current-time curve, I-t ), were applied to characterize the diverse properties of the electrodes. First, two typical antibiotic contaminants, berberine chloride (BEC) and tetracycline hydrochloride (TC), were used to investigate the degradation ability of the electrodes. As expected, results showed that the degradation of TC and BEC using MoS 2 /rGO/Bi 2 S 3 @CF was consistently above 90%, whereas the degradation achieved by independently using rGO/Bi 2 S 3 @CF and rGO/MoS 2 @CF was consistently below 85% and as low as 53%; this verified the excellent formation of the heterojunction. In addition, to further investigate the performance of MoS 2 /rGO/Bi 2 S 3 @CF, the test results under different conditions were discussed, such as pH, electrochemical property, light reactivity, dark absorption and recyclability in depth. All results of MoS 2 /rGO/Bi 2 S 3 @CF demonstrated good performance than rGO/Bi 2 S 3 @CF and rGO/MoS 2 @CF. Based on the UV–Vis DRS, UPS, EPR and trapping agent experiment results, the electron generated and Z-scheme transport mechanism in the fuel cell was proposed. Moreover, electron transmission from MoS 2 /rGO/Bi 2 S 3 @CF to BiOBr@CF through an external circuit further suppressed the recombination of electron-hole pairs. This new catalytic pollution control route is expected to provide a new way for efficient pollutant degradation with low energy consumption.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhencai Qu,Chang-an Xu,Xiaobin Li,Yifei Wu,Kunxin Wang,Xiaole Zheng,Xiaohua Cui,Xiankun Wu,Jun Shi,Kun Wu
Design and exploitation of smart fire-warning devices with ultrasensitive response capability are always an urgent need for effective fire protection. Herein, a nano-filler (BP-MoS 2 ) is prepared by ball milling black phosphorene and molybdenum disulfide and added into the graphene oxide (GO) film to fabricate a multifunctional film with high fire resistance and rapid response ability. When the addition of BP-MoS 2 is 20.0 wt%, the GO/BP-MoS 2 20.0 shows an excellent flame retardancy. The residual char rate is improved from 46.60% to 66.65%, and its peak of heat release rate (pHRR) value has reduced from 599.92 W g −1 to 274.00 W g −1 , resulting in a 54.33% decrease, which is attributed to the ultra-fast catalytic char formation and synergistic flame retardancy of BP and MoS 2 . Meanwhile, the composite film can still maintain the original shape within 15 s of ignition. More interestingly, when encountering a flame attack, it reveals an ultra-fast fire warning response (about 1 s), which is attributed to the fast carbonization after contacting with flame. Such approach offers a novel perspective for the preparation of intelligent fire alarm devices with ultra-fast response ability.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
·
IF 8.067
Ting He,Jiajia Ru,Yutong Feng,Dapeng Bi,Jiansheng Zhang,Feng Gu,Chi Zhang,Jinhu Yang
Rational design of advanced polar hosts with high sulfur loading, facilitated ionic/electronic transport and effectively suppressed shuttling effect has great potential for high performance lithium-sulfur batteries, yet it remains challenging. Here we propose a novel templated spherical coassembly strategy to fabricate the MoS 2 /C hollow spheres as an efficient sulfur host material. The unique hollow structure provides enough interior space for accommodating a substantial amount of sulfur, and effectively suppresses the diffusion of dissolved polysulfides by both physical confinement and chemical adsorption. Moreover, the ionic transport as well as the ability to mitigate volume variation upon cycling is also improved, thereby maximizing the utilization of sulfur. Owing to these merits, when evaluated as a sulfur host for lithium-sulfur batteries, the MoS 2 /C hollow spheres exhibit appealing electrochemical performance with an impressive specific capacity of 1082 mA h g −1 at 0.1 C, excellent rate capability and superior cycling stability with a low fading rate of 0.04% per cycle.
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高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
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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PubMed
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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DOI
PubMed
高影响因子
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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高影响因子
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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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
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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高影响因子
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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MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 11
·1-8
·
IF 5.479
Hu Xiaopeng,Xi Jiajia,Xia Yuanyuan,Zhao Faqiong,Zeng Baizhao
A space-confined synthesis method is employed for the preparation of a single-layer MoS 2 –boron doped ordered mesoporous carbon nanocomposite. A phenol-formaldehyde resin is used as carbon source to create a confined space for the formation of single-layer MoS 2 . The addition of pluronic F127, as a soft template, suppresses the stacking of MoS 2 layers and makes the composite porous. The nanocomposite is characterized by scanning electron and transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and energy dispersive X-ray spectroscopy. The single-layer MoS 2 sheets have a lateral size of about 5 nm and are uniformly embedded in the composite. They possess numerous active edge sites and display a strong synergistic effect with other components. The composite is modified on a glassy carbon electrode, followed by the electrochemical imprinting of theophylline, and the resulting electrode exhibits good electrochemical response to theophylline. The linear response range is 0.01–250 μM by differential pulse voltammetry, and the lower detection limit is 5 nM. It has been successfully applied to the determination of theophylline in spiked tea drink samples.
Single-layer MoS 2 –boron doped ordered mesoporous carbon nanocomposite has large surface area and high catalysis, when coupling with molecularly imprinted polymer the resulting electrode shows highly sensitive and selective response to theophylline.
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PubMed
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 12
·125312
·
IF 1.449
Maoyong Zhi,Quanyi Liu,Shansong Gao,Yinlong Zhao,Xinhua Zhu,Xuhong Jia
A novel three bilayers nanocoating containing MoS2 nanosheets and C60 was constructed on the surface of flexible polyurethane (FPU) foam by a layer-by-layer assembly method. MoS2 nanosheets were prepared by ultrasonic-assistant exfoliation method in a mixed solvent of N-Methyl-2-pyrrolidinone (NMP) and aqueous hydrogen peroxide (30% H2O2). MoS2-C60/FPU foam was prepared by alternately submerging the FPU foam into C60/guargum and MoS2/sodium alginate suspensions. Scanning electron microscopy (SEM) characterization showed that MoS2 nanosheets and C60 nanoparticles were uniformly distributed on the surface of FPU foam matrix. Thermogravimetric analysis demonstrated that MoS2-C60/FPU foam exhibited better thermal stability than the control FPU foam. Cone calorimeter test results revealed that MoS2-C60/FPU foam with the incorporation of 5.24 wt% MoS2-C60 nanocoating had a remarkable reduction in peak heat release rate (pHRR, 47.5% reduction), total heat released (THR, 51.1% reduction) and total smoke production (TSP, 33.1% reduction) compared with those of the control FPU foam. Furthermore, the morphology and structure of char residue after cone calorimeter test were investigated by SEM and Raman spectroscopy. The possible flame-retardant mechanism of MoS2-C60/FPU foam was proposed, and this significant improvement in flame retardancy could be ascribed to the insulating barrier and adsorption effect of MoS2 nanosheets, free radicals-trapping ability of C60 in condensed phase, and the catalytic carbonization effect of the MoS2-C60 nanocoating. This work provides a new approach for producing high quality flame retardant polyurethane foam materials.
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高影响因子
危险品化学品经营许可证（带存储）