SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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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
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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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
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 Chemistry C
·
2021
·Vol. 9
·期 43
·15552-15565
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IF 7.393
Menghan Xu,Tao Wu,Yiheng Song,Ming Jiang,Zhuqun Shi,Chuanxi Xiong,Quanling Yang
As good alternatives to conventional rigid piezoelectric materials, environment-friendly biomass-based piezoelectric nanocomposites comprising piezoelectric ceramic fillers and a natural polymer matrix are highly desirable for flexible piezoelectric nanogenerators (PENGs) with high output performance. In this work, composite piezoelectric films were successfully prepared through uniform assembly of MoS2 nanosheets and tetragonal BaTiO3 nanoparticles in a 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized cellulose nanofibril (TOCN) matrix using a facile, cost-effective and scalable method. The TOCN/MoS2/BaTiO3 ternary composite film demonstrated excellent mechanical properties with the highest tensile strength of 335 MPa and outstanding piezoelectric properties with the maximum longitudinal piezoelectric constant (d33) of 45 pC N−1 much higher than that of other cellulose-based piezoelectric materials. Benefiting from the prominent performance of the flexible cellulose-based nanocomposite, the resulting flexible TOCN/MoS2/BaTiO3 composite film-based PENG exhibited very high and stable output piezoelectric signals: namely, a maximum open-circuit voltage of 8.2 V and a maximum short-circuit current of 0.48 μA. Furthermore, the electricity generated by the PENG illuminated a LED directly or charged a 10 μF capacitor up to 3.1 V at 110 s. With high flexibility and sensitivity, the innovative device can work not only as a self-powered motion sensor to detect tiny forces in the environment and in human motion, but also as an electronic skin with good pyroelectric properties to monitor the temperature. Thus, this research provides new insights into the design and preparation of lightweight and simple-structure PENGs with high flexibility and remarkable piezoelectric performance, presenting great potential in the development of efficient mechanical energy harvesters, active sensor networks and wearable electronics.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Huan Li,Minhui Gong,Jiayu Xiao,Luo Hai,Yuze Luo,Lidan He,Zefeng Wang,Le Deng,Dinggeng He
Combined therapy can improve the curative effect and reduce side effect, so it has a broad application prospect in the treatment of bacterial infections especially bacterial biofilm infections. Herein, we propose a photothermal-activated multifunctional nano-antibacterial platform that is constructed by Introducing indocyanine green (ICG) photosensitizers and silver nanoparticles (AgNPs) onto Molybdenum disulfide (MoS 2 ) nanosheets surface. The constructed nanoplatform (MoS 2 /ICG/Ag) has the combined chemo/photothermal/photodynamic triple-mode antibacterial capability under a single 808 nm laser irradiation. Briefly, the photonic hyperthermia generated by MoS 2 nanosheets can not only directly kill bacteria, but also accelerate the release of ICG and silver ions, and the latter is a commonly used chemical antibacterial reagent. The released ICG can catalyze the conversion of oxygen into singlet oxygen with the help of 808 nm light, achieving the photodynamic sterilization. Encouragingly, the loaded ICG and AgNPs can in turn enhance the heat, which is a mutually reinforcing effect that can produce a combined or even synergistic therapeutic effect. In vitro experiments demonstrate that the MoS 2 /ICG/Ag with triple bactericidal modalities has good broad-spectrum antibacterial performance. Importantly, it can remarkably inhibit the S. aureus biofilms formation and effectively eradicate the bacteria deep in the biofilms. In addition, the MoS 2 /ICG/Ag is successfully used for treating S. aureus biofilms-infected wound in vivo with minimal toxicity. Taken together, the developed MoS 2 /ICG/Ag nanoplatform may serve as a potential nano-antibacterial agent for photothermally activated multimodal combined antibacterial and antibiofilm therapy.
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高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 12
·125312
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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
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2019
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IF 3.218
Zhenggang Jia,Xuexi Zhang,Jing Zhong,He Tian,Yueping Xiong
Reversible specific capacity and rate performance are required for MoS 2 nanomaterials as lithium-ion batteries (LIBs) anodes. Here we reported a novel MoS 2 structure with nano-size subgrain microstructure and thus enhanced electrochemical performance produced by a low-temperature hydrothermal synthesis technique. Ammonia solution treatment was proved feasible to remove the S 2 2 − and MoO 3 impurities from the composite produces. After purification of the MoS 2 prepared at a temperature of 160 °C, the (002) interlayer spacing was ~0.69 nm. In addition, the MoS 2 sheets consisted of nano-size subgrains, with Mo enrichment at grain boundaries. As a result, a reversible specific capacity of 826 mAh g − 1 at a current density of 0.1 A g − 1 and rate performance of 700 mAh g − 1 at 1 A g − 1 were achieved. This shows that high purity MoS 2 nanomaterials prepared via ammonia solution may act as promising materials for high performance anodes.
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高影响因子
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
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 11
·1-9
·
IF 5.479
Ma Guangran,Xu Hui,Wu Meijuan,Wang Lin,Wu Jianghua,Xu Fugang
A ternary hybrid composed of molybdenum disulfide (MoS 2 ), reduced graphene oxide (rGO) and gold nanoparticles (AuNPs@MoS 2 -rGO) was prepared and used for voltammetric detection of hydroquinone (HQ), catechol (CC) or resorcinol (RC). The composition and structure of the hybrid were characterized in detail. The electrochemical behaviors of a glassy carbon electrode (GCE) modified with the hybrid towards the oxidation of HQ, CC, and RC were investigated using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The results revealed 3D MoS 2 is active for the catalytic oxidation of these isomers. Additional integration with rGO and AuNPs further improves catalysis due to their synergistic interaction. The enhanced catalysis leads to oxidation of HQ, CC and RC at 0.074 V, 0.178 V, and 0.527 V (vs. Ag/AgCl; by CV) with reduced overpotential (20-100 mV) and 8-fold or 3-fold increased peak current compared to those obtained on MoS 2 /GCE, or MoS 2 -rGO/GCE, respectively. Selective detection of one isomer in the presence of the other two was realized by DPV. The linear ranges are 0.1–950 μM, 3–560 μM, and 40–960 μM for HQ, CC, and RC, and the detection limits are 0.04 μM, 0.95 μM, and 14.6 μM, respectively. The sensor also shows good selectivity and displays satisfactory recovery for real sample analysis.
Schematic illustration of the preparation of AuNPs@MoS 2 -rGO hybrid by hydrothermal growth of MoS 2 -rGO and subsequent electrodeposition of gold nanoparticles (AuNPs), and its application for selective detection of hydroquinone, catechol and resorcinol by voltammetry.
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PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Junying Huang,Mengting Chen,Xiaojun Li,Xiaowen Zhang,Liyun Lin,Weipeng Liu,Yingju Liu
Molybdenum disulfide (MoS 2 ), although considered as a promising transition metal dichalcogenides catalyst, owns low plane conductivity that limits its effective application. In this work, we grew monodispersed MoS 2 nanoflakes on reduced graphene oxide (rGO), and then assembled the resulting MoS 2 -rGO with carbon nanotubes (CNTs) in a layer-by-layer manner to form the MoS 2 -rGO-CNTs composite. The CNTs spacing layer not only reduces the whole catalytic material's resistance by bridging different broken MoS 2 -rGO nanosheets , but also constructs a three-dimensional structure to prevent 2D MoS 2 -rGO nanosheets restacking and thus increases the active sites. Such three-dimensional MoS 2 -rGO-CNTs catalyst exhibited a low Tafel slope of 39 mV dec −1 and a high current density of 1200 mA cm −2 at −400 mV. Therefore, our study showed a cheap and simple method to combine three-dimensional hybrid material, facilitating the large-scale application of non-noble catalyst.
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高影响因子
ACS Applied Energy Materials
·
2019
·
IF 0
Kai Meng,Shuxian Wen,Lujing Liu,Zhijun Jia,Yi Wang,Zhigang Shao,Tao Qi
Layered MoS2 has attracted increasing interests as a promising low-cost alternative to Pt-based electrocatalysts for the hydrogen evolution reaction (HER). As is known to all, insufficient active sites and poor conductivity of MoS2 impede the improvement of its catalytic efficiency. In this work, the vanadium nitride (VN) with an enlarged specific surface area (VN(CTAB), CTAB refers to hexadecyltrimethylammonium bromide) was prepared as a substrate, and MoS2 nanoplates were vertically grown on the obtained VN(CTAB) for the first time. The synthesized MoS2–VN(CTAB) as an electrocatalyst for HER performs a low onset overpotential (85 mV) and small Tafel slope (53.31 mV dec–1) as well as superior stability. Besides the benefits from higher conductivity (106 S m–1) and greater stability of VN(CTAB) beyond the traditional carbon-based substrates, the expanded interlayer spacing (1.00 nm) and extra defects along with the lower valence states of Mo and S due to the stronger electron interaction between VN(CTAB) and MoS2 also effectively contribute to the excellent catalytic performance of MoS2–VN(CTAB). This study shows a new method to design efficient and stable HER electrocatalysts by means of non-carbon substrates.
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JOURNAL OF MOLECULAR LIQUIDS
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2019
·
IF 4.561
Qingmiao Wang,Lai Peng,Yuanyu Gong,Feifei Jia,Shaoxian Song,Yanmei Li
Because of the easy-separation, high specific surface areas and rich binding sites, magnetic MoS 2 with nanoscale architectures showed great potential in working as adsorbents for heavy metal ions . However, the general composites of nanoscale MoS 2 and Fe 3 O 4 suffered from the poor stability in acidic solution due to their entire exposures of Fe 3 O 4 to H + , which made it difficult to regenerate the used adsorbents by the general acid treatment. This work reported a facile approach to prepare Fe 3 O 4 @Polydopamine (PDA)-MoS 2 nanospheres via in-situ growth of MoS 2 on the PDA modified Fe 3 O 4 nanospheres. Fe 3 O 4 @PDA-MoS 2 nanospheres possessed a fast adsorption of 2.4076 g/mg·min (Initial concentration of Pb 2+ : 200 mg/L) and high adsorption capacity of 508.9 mg/g at 298 K to Pb 2+ . This was because the specific surface area of MoS 2 grown in-situ on Fe 3 O 4 @PDA was 7.6 times that of the pure MoS 2 , which significantly increased the binding sites of MoS 2 for heavy metal ions. In addition, the as-prepared nanocomposites exhibited not only easy-separation within 120 s by an external magnet, but also long-term stability in strong acid solutions as well as facile regeneration by general acid treatment. The tight PDA layers outside the Fe 3 O 4 nanospheres could work as not only a template for the formation of MoS 2 nanoflowers but also an efficient protective coating for the improvement of the stability of nanocomposites. The findings might open up the possibility of expanding the practical application of nanoadsorbent in environmental remediation.
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高影响因子
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