CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2020
·
IF 2.627
Shujuan Xiao,Xiaowen Huo,Shuxin Fan,Kui Zhao,Shouwu Yu,Xiaoyao Tan
To enhance the performance of the polyphenylene sulfone (PPSU) membrane, a novel mixed matrix membrane with hydrophilicity and antifouling properties was prepared. Using PPSU as the basic membrane material, polyvinyl pyrrolidone (PVP) as the porogen, N -Methyl pyrrolidone (NMP) as the solvent, and MOF-CAU-1 (Al 4 (OH) 2 (OCH 3 ) 4 (H 2 N-BDC) 3 · x H 2 O) as the filler, PPSU/CAU-1 mixed matrix membrane (MMM) was prepared by an immersion precipitation and phase transformation technique. By changing the amount of MOF-CAU-1, the properties and performance of the MMM membrane were investigated in terms of hydrophilicity, pore morphology, surface roughness, and dye removal. The results show that the highest pure water flux of the mixed reached 47.9 L·m −2 ·h −1 , when the CAU-1 addition amount was 1.0 wt%, which was 23% higher than that of the pure PPSU membrane. Both the rejection rate and the antifouling performance of the MMM membrane also noticeably improved.
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高影响因子
MATERIALS LETTERS
·
2019
·
IF 3.019
Wanjun Zhao,Hui Ren,Yapeng Ou,Qingjie Jiao
The ignition temperature and combustion behavior are key parameters for the performance of energetic nanocomposites. This article aims to obtain nanocomposites with low ignition temperature and high reactivity by incorporating titanium nanoparticles (nTi) to aluminum nanoparticles (nAl)-based thermites. The ignition temperature, reactivity, and combustion efficiency of Al/xTi/oxidizer composites were investigated via temperature-jump (T-jump), combustion test, and calorimeter. The results reveal that the ignition temperature of Al/ x Ti/oxidizer composites shifted down ~90 °C, ~140 °C, and ~220 °C by adding 50 mol.% nTi (in the fuel) into nAl/KClO 4 , nAl/K 2 S 2 O 8 , and nAl/KIO 4 respectively. The reactivity of nAl/K 2 S 2 O 8 and nAl/KIO 4 also increased by 50% after adding 30% nTi. However, the combustion efficiency of nAl-based energetic composites reduced with the increasing contents of nTi. This study demonstrates that Al/ x Ti/K 2 S 2 O 8 and Al/ x Ti/KIO 4 nanocomposites with low ignition temperature, high reactivity, and moderate combustion efficiency are good candidates for energetic applications.
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高影响因子
Journal of Chemistry
·
2019
·
IF 1.727
Fei Chang,Zhong Bing He,Quan Zhou
Four kinds of Al-TiO2 solid samples with different Ti/Al ratios of 1 : 0.1, 1 : 0.09, 1 : 0.07, and 1 : 0.05 were synthesized via a solid-phase synthesis method and characterized by XRD, SEM, EDS, BET, and other techniques. The prepared solids were used for separation of the bioderived product danshensu, the content of which was determined by UV spectrophotometry. Moreover, the effects of extract concentration, PH value, adsorption time, and ethanol elution volume were investigated. The results showed that these Al-TiO2 samples had good adsorption and desorption ability. Especially, the solid Al-TiO2 with a Ti/Al ratio of 1 : 0.05 is more suitable for the separation of danshensu, exhibiting a higher adsorption (77.70%) under 2 h adsorption time and pH = 3; meanwhile, the high desorption rate (70.29%）was received under 80% ethanol and the sample concentration of 3.0 mg/mL.
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高影响因子
ADVANCED ENGINEERING MATERIALS
·
2019
·Vol. 21
·期 12
·1900825
·
IF 2.906
Yaofeng Mao,Lin Zhong,Xu Zhou,Dawei Zheng,Xingquan Zhang,Tao Duan,Fude Nie,Bing Gao,Dunju Wang
The booming development of 3D printing offers unprecedented hope for the construction of functional materials. However, it is still challenging to fabricate nano energetic materials due to the high sensitivity of energetic materials and the difficulty of high loading of materials. Recently, ink-based direct ink writing (DIW) 3D printing process for the preparation of reactive materials has attracted worldwide attention because of the simplicity in design of micro architecture and the possibility of low-cost manufacturing. Herein, a novel strategy for printing Al/CuO nanothermite is successfully achieved by DIW 3D printing of nanothermite inks with good rheology shear-thinning properties using F 2311 as a binder. The loading of nanothermite in this ink formula is up to 90 wt.%, and the burning rate can be as high as 352 mm s −1 . This approach provides new routes for achieving the applications in micro energetic device by printing high resolution and precise patterns of nanothermite with enhanced combustion performance.
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MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Kewen Ding,Yuchen Wu,Xiaofeng Wei,Xuewei Zhu
This study aims to fabricate chromium-free Zn–Al + CeO 2 composite coatings by integrating CeO 2 nanoparticles into the chromium-free Zn–Al coating solution as a strengthening agent and subsequently applying a wet coating method. The corrosion resistance of the coatings was evaluated through NaCl immersion corrosion tests . The microscopic morphology, composition and electrochemical properties of the composite coatings before and after corrosion were analyzed using SEM and an electrochemical workstation. The corrosion resistance mechanism of the coatings was investigated as well. The results revealed that the CeO 2 nanoparticles were uniformly distributed on the surface of the composite coating and in the gaps between Zn and Al powders, forming micron-sized particles due to the surface energy effect. The composite coating exhibited a minimum corrosion current density of 0.63 μA cm −2 and a maximum corrosion electrochemical reaction resistance of 35321 Ω cm 2 . Additionally, a complex precipitate formed by the reaction of certain Ce elements in the composite coating enhanced the cathodic protection of the coating. Moreover, Ce 3+ reacted with the OH − generated by microelectrochemical corrosion, resulting in the formation of a precipitate that filled in the gaps between Zn and Al powders. Consequently, this process contributed to the formation of a microporous and flocculent coating structure. In conclusion, the incorporation of CeO 2 nanoparticles had a favorable impact on the production of environmentally friendly and corrosion-resistant chromium-free Zn–Al coatings.
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高影响因子
FUEL
·
2023
·
IF 7.4
Ying Wang,Xinyu Sun,Yang Liu,Shiqing Zhang,Fang Liu,Ying Li,Yanming Xue,Chengchun Tang,Jun Zhang
The development of highly efficient, long-lasting, and earth-rich electrocatalysts for hydrogen evolution processes (HER) is crucial to the advancement of hydrogen energy. Due to its improved catalytic activity, extraordinary chemical stability, and low cost, pyrite cobalt selenide (CoSe2) has become an incredibly potential replacement for Pt-based HER electrocatalysts . However, because of limited hydrogen adsorption and accompanying restrictions in its electronic structure, its practical application has run into difficulties. Herein, we have introduced aluminum (Al) into CoSe2/CC nanowire arrays on carbon cloth using a simple hydrothermal and selenization method. The synthesized materials serve as highly effective catalysts for HER, with the optimized Al-CoSe2/CC demonstrating a significantly overpotential reduced by nearly 90 mV compared to pure CoSe2/CC (from 243 mV to 153 mV) at a current density at 10 mA cm−2 and a small Tafel slope of 88 mV dec−1. Moreover, these catalysts exhibit exceptional durability, sustaining their performance for 24 h. Based on the experimental results and subsequent density functional theory (DFT) calculations, it has been demonstrated that Al doping can significantly enhance the electronic conductivity, maximize the hydrogen evolution adsorption energy, and improve the charge transfer ability. This work offers a profound insight into the correlation between cation substitution in non-precious metal-based catalysts and the enhancement of intrinsic HER catalytic performance.
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高影响因子
MATERIALS LETTERS
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2023
·
IF 3
Zhengquan Zhang,Yuling Wang
The micro-nano structures were successfully fabricated on Al-Li alloy by adjusting the concentration of sodium formate and controlling the hydrothermal temperature though hydrothermal treatment. The growing directions and morphologies for micro-nano structures were studied. The results show the micro-nano structures were a mixture of AlOOH and Al(OH) 3 with good crystallinity, the intensity of diffraction peaks increases with the increase of sodium formate concentration, and the growing direction of micro-nano structure varied from (2 0 0) at 110 °C and 130 °C to (1 1 1) at 150 °C. The morphologies of the micro-nano structures exhibit patterned surface with overlapping leaf-like nano-plates at 110 °C and 130 °C, nordstandite is predominant, flower-like at 150 °C,aluminum oxide hydroxide is predominant.These findings directly demonstrate that the preferential growing direction and the morphologies of micro-nano structure has been confirmed with the concentration of sodium formate and the hydrothermal temperature.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2017
·
IF 1.174
Tianhan Zhu,Hua Song,Xueya Dai,Hualin Song
The Al-doped Ni 2 P/Al-SBA-15 catalyst with high hydrodeoxygenation (HDO) activity was synthesized by temperature programmed reduction at a relatively low reduction temperature of 400 °C. The as-prepared catalyst was characterized by X-ray diffraction (XRD), H 2 temperature-programmed reduction (H 2 -TPR), X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM), NH 3 temperature programmed desorption (NH 3 -TPD), N 2 adsorption–desorption and CO uptake. The effect of Al on benzofuran (BF) HDO performance was investigated. The result indicates that the incorporation of Al into the SBA-15 support can promote the formation of much uniform, smaller, highly dispersed Ni 2 P particles on the catalyst. The Al also contributes to suppress the enrichment of P and promote more exposed Ni sites on the surface. In addition, the incorporation of Al can enhance the acid strength. The total deoxygenated product yield over Ni 2 P/Al-SBA-15 reached 90.3%, which is an increase of 19.4%, when compared with that found for Ni 2 P/SBA-15 (70.9%).
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International Journal of Electrochemical Science
·
2023
·
IF 1.5
Suichang Ong,Huili Yang,Tu Lan,Kai Huang,Tianzheng Xie,Jinxia Zhou,Yuan Cheng,Hang Guo,Ying Zhang
Surface coating and element doping are the key strategies in LIBs development to achieve a high and stable battery performance. In this paper, ZrO 2 is directly sputtered on the Al-doped LiCoO 2 (Al-LCO) composite electrodes, enabling a controllable oxide coating on the surface of the electrode. With a sputtered coating layer of ∼6 nm, the discharging capacity of the Al doped LCO coated with ZrO 2 (Al-LCO-ZrO 2 ) is 141.04 mAh g −1 at the 100th cycle within 3.0–4.7 V at 1 C, while the Al-LCO (without coating layer) is 126.66 mAh g −1 . After 100 cycles of charging-discharging at high voltage region, the capacity retention of the Al-LCO-ZrO 2 -3 (90.7%) is also higher than the Al-LCO (75.57%). It is worth noting that, in this paper, due to the Al doping and the ZrO 2 coating, we increase the operation voltage up to 4.7 V, in which the batteries can obtain a higher energy density.
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MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2023
·
IF 6.4
Yang Wang,Qiang Liu,Biao Zhang,Hongxu Wang,Paul J. Hazell,Bo Li,Tao Song,Ling Li,Futian Liu,Feng Ye
Functionally gradient materials (FGMs) primarily composed of a discretely layered structure with relatively sharp macroscopic interfaces are highly susceptible to interlayer failure under impact loading . Nacre is regarded as a model system for lightweight armor with high impact-resistant performance owing to its multiple length-scale and gradient structures. However, the simultaneous translation of both structural features into artificial assemblies remains challenging. Herein, we constructed new B 4 C/2024Al FGMs with eliminated sharp interfaces, which reproduced the hierarchical and gradient architectures of nacre. A combined experimental and numerical approach was employed to investigate the protective mechanisms of nacre-like FGMs subjected to 7.62 mm armor-piercing incendiary bullet, and two homogeneous composites were also tested under the same conditions for comparison purposes. The FGMs exhibited improved performance to resist ballistic attacks and maintain integrity compared with the uniform structures. As the ceramic contents decreased along the thickness, the energy dissipation mechanisms transitioned from eroding projectile to plastic deformation . The toughness gradient and varying energy dissipation modes prevented the formation of crushed cones at the ceramic-rich layers. The nacre-like structure created several extrinsic toughening mechanisms, which led to the increased energy-absorbing capability of the target. Meanwhile, the eliminated abrupt interfaces avoided the occurrence of interlayer tearing by diminishing the tensile wave strength and the sudden change of wave impedance, which prolonged the projectile-target interaction period and strengthened the eroding effect on the projectile. The present study opens new opportunities to design advanced lightweight FGMs armors with high impact-resistant protective performance.
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Materials Research Express
·
2019
·Vol. 6
·期 4
·046532
·
IF 1.449
Chen Chen,Binxu Lan,Kang Liu,Hongbo Wang,Yuxin Deng,Yufei Zuo,Xiaohan Xu,Cheng Chen,Zhen Chen,Ping Luo,Shijie Dong
Herein, we prepared Al–Bi–NaCl composites by mechanical ball milling and investigated the effects of ball milling time on their hydrogen production performance, additionally analyzing energy conversion during ball milling. Subsequently, the effects of Bi and NaCl content and initial temperature on hydrogen production performance were studied. Moreover, the phase, morphology, and elemental composition of these composites and by-products of their hydrolysis were studied by a range of instrumental techniques. An optimal hydrogen yield of 1140 ml g−1 (in 1 h) was obtained at a milling time of 4 h, and the results of instrumental characterization showed that no new phase was formed during ball milling (i.e., Al, Bi, and NaCl were only mechanically mixed) and that the constituent elements were evenly distributed in the composite. Hydrolysis by-products were identified as porous Al(OH)3 and AlO(OH), that is, Bi did not participate in the reaction.
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JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 5
·4115-4123
·
IF 2.993
Zhou Xiang,Zhu Ying,Ke Xiang,Zhang Kaili
In this study, we use simultaneous differential scanning calorimetry and thermogravimetric analysis to analyze the solid-state reaction characteristics of Al/Fe 2 O 3 nanothermites before n -Al melts. Different experimental setups for thermal analysis are compared, and the heat-release characteristics are studied on Al/Fe 2 O 3 nanothermites in the form of powder and pellet, respectively. It is found that protection provided by mere argon flow is far from enough for thermal analysis of Al/Fe 2 O 3 nanothermites. The experimental setup must be free of oxygen; otherwise, the determined exothermic peak is mostly the oxidation of n -Al by the residue oxygen molecules in the furnace body, due to the high reactivity and moderate accessibility of free oxygen molecules. Under proper experimental setup, it is found that besides the redox reaction between n -Al and n -Fe 2 O 3 , intermetallic reaction also occurs to form Fe 4 Al 13 . Moreover, the intermetallic reaction is more noticeable for nanothermite pellet than for nanothermite powder, and the eutectic reaction of Fe 4 Al 13 and n -Al leads to melting peaks below 655 °C. The results indicate that instrument configuration and sample status affect the testing results to a large extent, and one should be prudent to derive reaction characteristics of nanothermites.
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危险品化学品经营许可证（带存储）