Polymer-Plastics Technology and Materials
·
2019
·
IF 0
Bin Zhang,Yujie Jiang
Design and fabrication of SiO2@ammonium molybdate(AM) core-shell nanotubes are important for polylactic acid (PLA), these two components form a well-defined core-shell configuration that is distinct from simple core-shell or hybrid structures. The PLA was investigated by limiting oxygen index, vertical burning test and smoke density, cone calorimeter test, SEM and TGA. The results showed that SiO2@AM nanotube can effectively increase the flame retardancy and smoke suppression properties, and that it can apparently reduce heat release rate, total heat release and total smoke release. Furthermore, the addition of SiO2@AM nanotube brings better mechanical properties than the sample contain SiO2 nanotube. Here, SiO2@AM nanotube was considered to be an effective flame retardant in PLA.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
MATERIALS LETTERS
·
2012
·
IF 2.307
Shasha Liu,Xuebin Zhang,Hao Shao,Jie Xu,Fanyan Chen,Yi Feng
This paper describes a procedure of synthesizing MoS 2 nanofibers with hexagonal structure. Polyvinyl alcohol (PVA)/Ammonium tetrathiomolybdate (ATTM) composite nanofibers were prepared by a sol–gel method and an electrospinning technique. Subsequently, the MoS 2 nanofibers were derived from reduction of these precursor composite fibers at 450 °C under a H 2 atmosphere for 2 h, and calcinating at higher temperature under an Ar atmosphere for 6 h. The precursor composite nanofibers and the MoS 2 nanofibers were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results showed that the crystalline phase and fiber morphology were largely influenced by the calcination temperature in Ar atmosphere, the diameter of MoS 2 nanofibers distributes from 50 nm to 200 nm.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Frontiers in Bioengineering and Biotechnology
·
2022
·
IF 6.064
Ji Yansong,Zhang Xiaoning,Zhu Yong,Norton Michael L.,Shen Lunfu,Tan Wenhui,Zheng Xi,Li Shuo
A previous study found that the capacitive behavior of nanoparticles fed to the silkworm can be delivered to carbonized silk fibers, which can be used to fabricate electrodes for the construction of flexible supercapacitors. However, the tendency of nanoparticles to aggregate decreases the quantity of nanoparticles that enter the silk and therefore reduces the capacitance performance of the prepared carbonized silk. Here, we sprayed ammonium molybdate tetrahydrate (AMT) on the surface of mulberry leaves used for feeding silkworms and investigated the effect of feeding AMT on the growth of silkworms and the properties of spun silk. The precursor incorporated into the silk was converted into scattered MoO2 NPs, which were embedded within the carbonized silk fiber (CSF) via carbothermal reduction. The specific capacitance of CSF obtained from silkworms fed with an aqueous solution of AMT-treated mulberry leaves reached up to 298 F/g at 0.2 g/A, which is much higher than that of the control group (102 F/g). Since AMT is highly water-soluble, and its concentration can be easily modulated, we believe that the proposed strategy is feasible for the large-scale fabrication of CSF with enhanced capacitive performance.
研究领域:
材料科学
·
电化学
·
生物材料
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DOI
PubMed
高影响因子
MATERIALS & DESIGN
·
2019
·
IF 5.77
Wentao Zhang,Shuo Shi,Xinnan Liu,Xinyi Ren,Min Li,Tianli Yue,Shaohui Ouyang,Jianlong Wang
Constructing MOFs-composite catalyst with satisfactory catalytic efficiency as well as low cost still presents a major challenge. In this work, a low-cost modular photocatalyst with controllable activity is facilely fabricated by embedding ZIF-8 nanocrystal clusters with ammonium tetrathiomolybdate (ATTM) (donated as ZIF-MS). The embedded ATTM molecules can not only serve as photocatalytic sites but also alter the nucleation and morphology of the resulted ZIF-MS, showing controllable activity for catalytic application. Under the optimized proportion of precursors, 576.52 nm ZIF-MS nanocrystal cluster composed of 24.70 nm grain, showing high activity and size selectivity for the photocatalytic degradation of environmental pollutants, was obtained. The combination of size-selectivity of structure-tunable ZIFs with high photocatalytic activity of embedded noble-free inorganic photocatalytic agent makes these ZIF-MS ideal candidates for photocatalytic applications.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
Materials Research Express
·
2015
·Vol. 2
·期 9
·095502
·
IF 0
Jipeng Guan,Liping Zhao,Chenyang Xing,Yongjin Li
In this work, a novel flexible MWCNTs@MoO2-C nanocable composite for lithium ion battery anodes was fabricated by the electrospinning of homogeneously dispersed MWCNTs in a PVA/ammonium molybdate tetrahydrate solution and subsequent thermal treatment of the electrospun nanofibers. In the resulting MWCNTs@MoO2-C nanocable composite, the MoO2 nanoparticles were uniformly dispersed in amorphous carbon nanofibers that contained well-embedded MWCNTs as their cores. Compared with samples without MWCNTs, the unique nanocable composite exhibited not only a high specific capacity but also excellent cycling performance and good flexibility. It delivered a high reversible capacity of 832 mAh g−1 at a current density of 50 mA g−1 after 30 cycles. The enhanced electrochemical performance of the MWCNTs@MoO2-C nanocable composite was attributed to its novel nanocable structure ensuring not only effective contact between MoO2 and the liquid electrolyte, but also high conductivity for Li+ and e– transfer.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
LANGMUIR
·
2025
·
IF 3.9
Yue Cao,Yanping Wang,Lirong Guo,Zhiyue Han,Haining Liu,Kaipeng Zhong,Shaoju Bian,Naicai Xu
A novel composite adsorbent, AMP@MIL-101(Cr), has been successfully synthesized by integrating ammonium phosphomolybdate (AMP) with the metal–organic framework MIL-101(Cr) for the efficient adsorption of rubidium ions (Rb+) from aqueous solutions. The results of structural characterizations confirmed that the crystalline framework of the adsorbent remained intact after Rb+ adsorption, indicating excellent structural stability. Adsorption kinetics, isotherm, and thermodynamics studies revealed that the adsorption process followed a single-layer chemisorption mechanism and was an endothermic reaction and spontaneous adsorption process with negligible influence from solution pH. The adsorbent exhibited a remarkable Rb+ adsorption capacity, reaching 69.4 mg·g–1 within 5 min in a solution containing 250 mg·L–1 Rb+ at 45 °C. In the Nanyi Mountain Oilfield, the adsorption rate of adsorbent for Rb+ (10.69%) exceeded that of other ions (Li+: 0.75%; Na+: 0; K+: 0.95%; Mg2+: 0.67%). Furthermore, the adsorbent still maintained 86.72% of its initial adsorption capacity after 5 consecutive adsorption–desorption cycles. These findings highlighted the great potential of AMP@MIL-101(Cr) as an efficient and stable adsorbent for the selective recovery of rubidium from aqueous environments.
研究领域:
环境科学
·
材料科学
·
化学工程
·
吸附技术
·
无机化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2024
·
IF 4
Zhichen Deng,Zihui Zhong,Li Li,Zhengquan Su,Yan Bai,Jincan He
A one-pot derivatization facilitated resonance Rayleigh scattering and absorption (abbreviated as one-pot RRS/Abs) dual-mode method was proposed for selective and rapid detection of phosphate. A one-pot derivatization reaction that takes only 5 min was introduced to generate a dual-mode spectroscopic signal and improve the selectivity. Using the derivatization agent (ammonium vanadic molybdate, AVM), spectral probe (crystal violet, CV), and sensitizing reagent (Triton X-114, TX-114), phosphate was transformed into a large supramolecular complex, resulting in a remarkable dual-mode signal response of RRS and UV–Vis absorption. The RRS signal (368 nm) and ratiometric absorption signal (A 590 nm /A 450 nm ) were linearly correlated with the phosphate concentration in the range of 0.05–1.0 µg/mL and 0.08–1.0 µg/mL, respectively. The correlation index (R 2 ) was 0.9976 and 0.9890, and the limits of detection (LOD) were 13 ng/mL and 42 ng/mL, respectively, which were lower than those obtained through most spectroscopic methods. The one-pot RRS/Abs dual-mode method was applied to detect phosphate in real food samples, with recoveries of 92.0%–110.0% and relative standard deviations (RSD) of 2.1%–6.6%. The one-pot RRS/Abs dual-mode method is rapid, selective, sensitive, convenient to operate, and capable of self-comparison, showing great promise for phosphate detection in complex samples. In addition, it offers an alternative strategy for the measurement of analytes with weak spectroscopic signals.
研究领域:
分析化学
·
食品科学
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2025
·
IF 2.6
Zhaoyang Gu,Yongming Huang,Beichen Lin,Kunde Lin
Current methods for determining dissolved reactive phosphorus (DRP) in sediment porewater mainly rely on ex-situ analysis, which can be labor-intensive and introduces errors due to changes in the concentration and morphology during sampling and transportation. Therefore, there is a clear need for in-situ measurement methods for DRP in sediment porewater. In this study, a novel in-situ analytical method was developed by combining diffusive gradients in thin-films (DGT) and digital imaging techniques, based on the classic phosphomolybdenum blue (PMB) method. During deployment, DRP in sediment porewater diffuses into the DGT device, while reducing reagent (ascorbic acid) from the diffusive gel simultaneously diffuses into the binding gel and reacts with ammonium molybdate, resulting in the formation of PMB compounds. The color of the PMB compounds was recorded in-situ using a digital imaging technique, and the resulting images were analyzed to calculate the concentration of DRP in surface sediment porewater. By using the new method, analytical data of DRP in surface sediment porewater could be quickly obtained in the field near real-time, without water sampling and any further sample treatment, transportation and instrumental analysis in laboratories. The key parameters including the loading procedure for colorimetric reagents in the gels, the concentrations of ammonium molybdate and ascorbic acid, the amount of C18, and the thickness of the C18 binding gel, were systematically optimized. The optimized method demonstrated a wide linear range (4 ‒ 1000 μmol L-1, R2=0.993), with satisfactory accuracy (-6.23% ‒ 8.68%, n = 3) and good precision (6.60% ‒ 13.46%, n = 3) at an exposure time of 60 min. The method also performed well across different salinities (0 ‒ 35) and in the presence of interfering ions (SiO32‒, AsO33‒, F‒, and S2‒). The method was successfully applied to both freshwater and seawater sediments, with results comparable to those obtained using traditional analytical methods. Overall, the proposed method provides a new strategy for in-situ determination of DRP in surface sediment porewater.
研究领域:
环境分析化学
·
海洋与淡水沉积物分析
·
原位传感技术
·
比色检测
·
地球化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2021
·
IF 6.609
Zhiguo Zhu,Haoyi Lin,Mingyue Chi,Xiongjie Gao,Yongmei Feng,Kaixuan Yang,Hongying Lü
Organic sulfides in fuel oil result in the formation of environmentally hazardous sulfur oxide through the combustion in vehicle engine. Oxidative desulfurization is considered to be an effective technique to eliminate sulfides in fuel oil, whose core is the construction of efficient catalytic systems under mild conditions. Herein, a biomimetic catalytic system was designed for aerobic oxidative desulfurization via coupling ammonium molybdate polyoxometalate with four different deep eutectic solvents (DESs), obeying multi-step electron transfer mechanism. It was found that the desulfurization efficiency was not directly associated with conductivity, viscosity and hydrogen-bonding strength. In combination with density functional theory (DFT) calculation, the difference in desulfurization efficiency was ascribed to the distinguished intrinsic oxidation ability of organic acid in DES. The optimal catalytic system not only could resist the adverse effect of naphthaline and indole within suitable concentration scope, but also did not show obvious decrease in desulfurization performance after ten runs. More importantly, deep desulfurization was still afforded for actual diesels using this catalytic system, indicating its enormously potential applications on an industrial level under mild conditions.
研究领域:
化学
·
催化
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2012
·Vol. 1
·期 7
·2558-2566
·
IF 0
Essy Kouadio Fodjo,Da-Wei Li,Niamien Paulin Marius,Trokourey Albert,Yi-Tao Long
AgxMoyOz (Ag/α-MoO3, Ag/h-MoO3, Ag/β-MoO3, Ag2Mo2O7, and Ag2MoO4) nanomaterials are synthesized at relatively low temperature (80 °C) and with a short hydrothermal treatment time (3 h) using glucose (Glc) as a catalyst. Contrary to previous studies, it is possible to synthesize one of the AgxMoyOz binaries at 80 °C by altering the pH of the reaction media in the presence of glucose. In addition, further experiments indicate that Ag/h-MoO3, Ag2Mo2O7 and Ag/β-MoO3 can be converted to Ag/α-MoO3 which can also be synthesized from a reaction involving ammonium heptamolybdate tetrahydrate and AgNO3 at room temperature using cysteamine in both methods. Characterization with UV-Vis, XRD and Raman spectroscopy reveals high purity of as-synthesized product. These synthesized products are finally used to fabricate SERS substrates by coating a silicon wafer with a mixture of silver nanoparticles (Ag NPs) and AgxMoyOz (Si@Ag/AgxMoyOz). The results show a good sensitivity and stability. In addition, it is also found that the SERS activity of Si@Ag/AgxMoyOz is higher than that of Si@Ag.
研究领域:
材料科学
·
纳米技术
·
表面增强拉曼光谱
·
化学合成
✓ 已验证
产品关联
DOI
EUROPEAN POLYMER JOURNAL
·
2022
·
IF 5.546
Yufei Wang,Zihao Chen,Nanshu Li,Hanbing Zhang,Jie Wei
In this study, we proposed programmable photo-responsive self-healing hydrogels containing polyacrylamide (PAM), polyacrylic acid (PAA), poly[2-(dimethylamino) ethyl methacrylate] (PDMAEMA), ammonium molybdate (Mo 7 ), and 7–2(acryloyl hydroxypropyl)-4-methyl-coumarin (AHPMC). Because of the electrostatic interaction of PAA and PDMAEMA, the hydrogel demonstrates good self-healing properties. Moreover, we introduced Mo 7 and coumarin derivative in the hydrogel, respectively, which endows the hydrogel photo-responsive properties. Under the control of UV light, PAM-AD/Mo 7 hydrogel with photochromic behavior could turn atrovirens, and PAM-AD/AC hydrogel with photoluminescent properties could emit blue fluorescence. In contrast, PAM-AD hydrogel possesses no photo-responsive behavior. Based on the self-healing and photo-responsive properties of the hydrogels, the three hydrogel blocks could be programmed and healed as a whole combination. In addition, we demonstrated the application of the hydrogel in optical information coding and encryption, which possesses good information coding and encryption effect. Therefore, the photo-responsive self-healing hydrogel may have potential applications in flexible information display and encryption fields.
研究领域:
材料科学
·
光学
·
化学
·
信息技术
✓ 已验证
产品关联
DOI
高影响因子
Environmental Science-Nano
·
2023
·
IF 7.3
Li Hao,Mei Guan,Qiangcheng Zheng,Minyan Zhou,Ziting Yin,Hongjun Zhou,Xinhua Zhou
Plant micronutrients can promote the growth and resist the invasion of severe bacterial diseases pathogens but their low efficiency and toxicity accumulation are desired to be addressed. A facile strategy of ionic liquid (IL) - assisted boron nitride nanosheet (BNNS) exfoliation and conjugation with various amounts of ammonium dimolybdate (ADM) providing plant micronutrients was proposed. The specific surface area grew by 14.8% via exfoliation and functionalization by BNNS-IL-ADM. The loading content of ADM within BNNS-IL-ADM with different ratios of ADM is 3.18%, 6.25%, and 10.04%. BNNS-IL-ADM aqueous dispersions under neutral condition possessed the larger absolute magnitude of zeta potential and manifested better colloidal dispersibility. BNNS-IL-ADM acting as a carrier harvested high loading capacity (509.0 mg·g-1) of volatile active ingredients, and also achieved long-term release behavior via nanoconfinement effect fitting best with Korsmeyer-Peppas model. BNNS-IL-ADM improved the antibacterial efficiency by 92.86% and 92.50% against soil-borne phytopathogenic bacteria Ralstonia solanacearum in comparison with ADM and commercial formulation. The stem diameter as an index against the infection of R. solanacearum in pot experiment was thicken by 48.28% and 10.26% treated by BNNS-IL-ADM in comparison with water control (CK) and ADM treatment. Moreover, BNNS-IL-ADM held promoting effect on seed germination and plant growth and represented facilitated fixation of major organic elements within plant tissue. BNNS-IL-ADM also presented excellent adhesion ability and uniform coating as seed dressing agent. Such platform offers a feasible strategy in control soil-borne bacterial wilt disease via triggered sustained release of nutrients and active ingredients acting on-demand.
研究领域:
纳米技术
·
农业科学
·
植物病理学
·
材料科学
·
生物技术
✓ 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）