VACUUM
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2019
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IF 2.515
Yanjun Yin,Xueming Li
This study focus on the combustion performance and energy released of self-propagating Al/CuO nanothermite with nanorod structure comprehensively. CuO nanorods with lengths of 50 nm–100 nm were synthesized in large scale by template-free hydrothermal method . Al/CuO nanothermite coatings were further built successfully by co-deposition of the as-prepared CuO nanorods and nano-Al via electrophoretic deposition (EPD). Additionally, the EPD kinetic behavior of CuO nanorods and Al/CuO composites is investigated comprehensively. The optimum deposition time is 15 min and the composites is much homogenous when equivalence ratio (Ф) of Al and CuO is 0.75. Furthermore, the onset temperature is down to 315 °C and the energy release is approximately 3043 J/g along with rapid and violent combustion performance in the thermite reaction of Al/CuO nanorods. It is speculated that the excellent properties of the Al/CuO nanothermite could be ascribed to the uniform distributing and intimate interfacial contact between nano-Al and CuO nanorods.
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高影响因子
IONICS
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2019
·Vol. 25
·期 8
·3859-3866
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IF 2.289
Bao Wentao,Tian Hua,Jiang Yang,Zhu Kaixin,Zhang Runa,Tan Yu,Li Wang,Yu Zhifeng,Wang Lin
Ni–Al layered double hydroxide with nitrate anions as interlayer building blocks was synthesized by a dual-anion intercalating strategy of hydroxyl and nitrate anions during a facile co-precipitation process. In this case, nitrate anions with low charge densities are capable to expand the interplanar spacing between host layers of Ni–Al layered double hydroxide in the replacement of pristine carbonate anions, benefiting to the diffusion of electrolyte ions to active sites within electrodes. Moreover, the optimization for packed arrangement of Ni–Al layered double hydroxide with nitrate anions nanosheets can be effectively realized by modulating reactant concentrations, leading to the formation of nanolayered structure in favor of increasing electrolyte accessible active sites within electrodes. The optimized Ni–Al layered double hydroxide with nitrate anions achieves a high specific capacitance of 1616 F g −1 at 1 A g −1 together with a capacitance retention of 82% at 10 A g −1 and good cycling stability.
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高影响因子
CERAMICS INTERNATIONAL
·
2019
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IF 3.45
Yichao Gong,Junjie Li,Shenghui Yang,Mao Yang,Hao Dang,Yingying Ren,Guojun Zhang,Tiecheng Lu
Investigations on the doping modification of tritium breeding materials have been becoming one of the interesting research areas in the past few years. Recently, preparation method, mechanical and physical properties and tritium release behavior of Li 4+x Si 1-x Al x O 4 solid solution have been studied because of its potential advantages in the field of tritium breeding materials. In this paper, a facile approach was proposed to prepare Li 4+x Si 1-x Al x O 4 pebbles with a relatively small grain. TG/DSC and XRD were conducted to investigate the formation process of Li 4+x Si 1-x Al x O 4 . The results showed the crushing strength and thermal conductivity were obviously improved by introduction of hetero-element Al into Li 4 SiO 4 , and the optimal x value for Li 4+x Si 1-x Al x O 4 was 0.2 from the point of high crushing strength and thermal conductivity. This study will be expected to provide references for fabricating other solid solution tritium breeders.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2018
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IF 3.141
Yuan Cai,Xiaofeng Xu,Hu Wang,Lei Wang,Lulu Chen,Rui Li,Jing Ding,Hui Wan,Guofeng Guan
Production of alternative, clean aviation fuel from biomass synthesis gas via Fischer–Tropsch (FT) synthesis has attracted much attention. In this paper, Al-SBA-15 supported cobalt catalysts with different Al/Si ratios were successfully prepared for the production of aviation fuel by FT synthesis. The physical and acidic properties of the Co/Al-SBA-15 catalysts were characterized by XRF, XRD, N2 adsorption–desorption, TEM, H2-TPR, 27Al NMR, NH3-TPD, and Py-FTIR. The formation of long-chain hydrocarbons was inhibited by the ordered mesoporous structure. Fischer–Tropsch activity and selectivity were demonstrated to be affected by the acidity of the Al-SBA-15 supports. The selectivity turned to lighter iso-paraffin products. Co-based catalyst with Al/Si ratio of 0.01 exhibited the highest selectivity (52.4%) for aviation fuel (C8–C18 products) and much higher ratio of iso-paraffin/normal-paraffin (iso/n) (20.2%). This study might provide useful information for the selective production of aviation fuel via FT synthesis.
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高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Hanqin Liang,Huilu Guo,Jinwei Yin,Kaihui Zuo,Yongfeng Xia,Dongxu Yao,Jian Zhang,Yuping Zeng,Shiwei Wang
Transparent AlON ceramics were bonded with Lu-Al-Si-O-N oxynitride glass interlayer at 1450 °C in nitrogen atmosphere in this investigation. The Lu-Al-Si-O-N oxynitride glass showed good wettability on the AlON substrate and had strong interface adhesion with each other. The joining process had no detrimental effect on the in-line transmittance of transparent AlON ceramics but caused slight decrease of flexural strength due to the partial decomposition. The bonding strength of AlON/AlON joint was 142.7 ± 6.3 MPa at room temperature and 110.1 ± 9.6 MPa at 1200 °C in situ, which were comparable with those of the parent AlON ceramics. Some Lu 2 Si 2 O 7 grains crystallized out from the glass interlayer after joining.
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高影响因子
INORGANICA CHIMICA ACTA
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2018
·
IF 2.264
Yebin Guan,Ming Xia,Xiaohong Wang,Weicheng Cao,Alessandro Marchetti
Nano-sized NH 2 -MIL-53(Al) particles were conveniently synthesized in aqueous solution at ambient temperature with a widely applicable mixing method, and the morphology and character were examined with a series of techniques. XRD patterns and TEM images showed that the obtained NH 2 -MIL-53(Al) material possessed rod-like shape, which is different from those obtained from N, N-dimethyl formamide (DMF). This nano-sized NH 2 -MIL-53(Al) matrix displayed enhanced efficiency for adsorptive elimination of methyl blue molecules in aqueous solution.
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高影响因子
MATERIALS CHARACTERIZATION
·
2017
·
IF 2.714
Baisong Guo,Xinming Zhang,Xi Cen,Xinhua Wang,Min Song,Song Ni,Jianhong Yi,Tao Shen,Yong Du
By hybridizing carbon nanotubes (CNTs) into SiC reinforced Al matrix composites , a novel composite was fabricated to achieve excellent mechanical properties and low coefficient of thermal expansion simultaneously. The study demonstrated that the CNTs can help to acquire the uniform dispersion of SiC particles in the Al matrix, because of their interaction during ball milling and hot rolling processes. In addition, the results revealed that such design optimizes both the mechanical and thermal properties, due to homogeneous microstructure as well as tight and uniform interfaces induced by the addition of CNTs. Strengthening mechanism and Sideridis's model were used to discuss the effects of the CNTs on the mechanical and thermal properties. This study opens up an unexplored avenue for simultaneous improvement of the mechanical and thermal properties of metal matrix composites .
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高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Ningning Zhou,Huihui Zheng,Mengen Hu,Rui Liu,Guangchao Qin,Yilin Lu,Haibin Tang,Zhulin Huang
In this study, highly uniform 3D Al nanoneedle arrays (AlNNAs) decorated with Ag nanopines are synthesized by anodization of Al foil with prior nanoimprinting and subsequent electrodeposition method, demonstrating remarkable surface-enhanced Raman scattering (SERS) property. The AlNNAs possess a highly ordered periodicity of 1 μm and nanoneedle height of 800 nm, making it an optimal supporting matrix to host Ag-NPs as SERS substrate. Such well-ordered Ag@AlNNAs SERS substrate with precisely electrodeposited Ag nanopines generate high density SERS host spots and abundant sites to adsorb target molecules. As a result, Ag@AlNNAs exhibit high sensitivity for rhodamine 6 G down to 10 –13 M and good signal reproducibility with a relative standard deviation of 7.2 %, as well as an average enhancement factor of 4.23 × 10 9 . For practical detection of pollutants, 10 –8 M adenine , 10 –12 M bisphenol in water, and melamine (10 –7 M) in opaque milk are clearly identified by using the Ag@AlNNAs sensor. This study opens a bright way to fabricate SERS substrate with a good balance of sensitivity, reproducibility and cost, indicating promising potential for environmental monitoring and food safety.
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高影响因子
ACS Omega
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2016
·
IF 0
Zhiyi Wu,Qiangqiang Zhu,Chun Shen,Tianwei Tan
Aimed at the green synthesis of supported noble metal nanoparticles without any additional reducing agents or stabilizers at room temperature, a new strategy in which monodispersed Pd nanoparticles were successfully immobilized on Mg–Al mixed metal oxides derived from layered double hydroxides was developed, and the reduction mechanism was also proposed. It allowed the in situ immobilization of monodispersed Pd nanoparticles with a face-centered cubic structure, using only alcohols with α-hydrogen atom as the solvent and reducing agent. Control over the mean particle size and content of Pd nanoparticles was realized by adjusting the temperature, initial concentration, and type of alcohol. With the content of Pd varied from 6.4 to 42.3 mg/g, the mean particle size of Pd increased from 1.1 to 4.9 nm. The as-prepared catalyst showed high catalytic activity for oxidation of benzyl alcohol: when the Pd content was 6.4 mg/g, conversion of 60.3% and selectivity of 99.2% were obtained with a turnover frequency of 4807 h–1. Similarly, on the basis of the high stand electrode potentials, immobilized Ag (5.6 nm) and Au (4.7 nm) nanoparticles were also prepared through this methodology. Moreover, the choice of supports was extended to other powder supports that would react with the byproduced acid. Overall, this facile method opens up new opportunities for controllable synthesis of supported nanoparticle catalysts in a green way.
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PubMed
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2016
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IF 2.76
Zaihang Zheng,Yan Liu,Yuan Bai,Jijia Zhang,Zhiwu Han,Luquan Ren
Inspired by typical creature living surface with hydrophobicity, the hydrophobic graphene surface was successfully achieved on aluminium alloy substrate by a novel route. It is composed of two steps: biomimetic microstructure processing (BMP) on substrate and then preparation-transfer process of graphene via chemical vapor decomposition (CVD). The surface structure morphology, wettability and anti-corrosion were systematically investigated. It was found that the static water contact angle for the as-prepared surface was as high as 130.8 ± 1°, demonstrating that the hydrophobic surface is formed on aluminium alloy substrate. It can be interpreted by the synergistic effect between BMP and CVD methods in constructing the biomimetic and hydrophobic graphene surface. Besides, the anti-corrosion property of Al alloy was improved by forming CVD-grown graphene coating on the substrates according to the results of electrochemical corrosion experiments. The synergistic method was not only applied to fabricate hydrophobic graphene film but also provided a versatile route in multifunctional graphene film suited in wide application.
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高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
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2016
·
IF 3.897
Yu Zhao,Nana Li,Shengji Xia
Zn–Al layered double hydroxides (LDH) modified polyamide (PA) nanofiltration (NF) membranes were successfully fabricated by interfacial polymerization of 1,3-Phenylene diamine (MPD) and 1,3,5-Benzenetricarbonyl trichloride (TMC) monomers . Compared to raw PA membranes, the LDH incorporated membranes showed denser PA layers with more leaf-like folds, rather than ridges and valleys, according to images from field emission scanning electron microscopy (FESEM) and atomic force microscope (AFM). Higher hydrophilicity (with the contact angle decreased from 70.33° to 55.66°) and water permeability (with pure water flux enhanced from 6.76 to 9.48 L/m 2 h, measuring approximately 40.2% improvement) were achieved by PA membranes embedded with Zn–Al LDH nanoparticles . The rejection ability of different membranes was evaluated using Aldrich-humic acid (HA) and water from the Huangpu River; the results indicated that PA/LDH membranes exhibited a higher removal efficiency of natural organic matter (NOM). Excitation–emission matrix (EEM) fluorescence spectroscopy was also used in analysing raw natural water and permeate to investigate the removal mechanism toward different types of organic matters; better antifouling properties were observed for modified PA membranes.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
·
IF 2.567
Daixiong Zhang,Qing Xiang
Because of its high energy density, an Al–Co3O4 reactive nanocomposite (Al–Co3O4 RNC) has attracted vast attention. In this study, Al–Co3O4 RNC was successfully prepared as a coating by an electrophoretic deposition (EPD) method. An ethanol–acetylacetone (1:1 in volume) mixture containing 0.25 mM nitric acid was employed as a suitable dispersion medium for EPD. Differential scanning calorimetry revealed that the obtained Al–Co3O4 was a high-energy coating with a maximum heat release of 2638 J·g–1. Moreover, an attempt at assembling an electrophoretic Al–Co3O4 RNC coating onto an electrothermal copper bridge was also made. A successful ignition test indicated that this novel Al–Co3O4 RNC coating has great potential for application in the microignitor field.
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高影响因子
危险品化学品经营许可证（带存储）