FUEL
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2025
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IF 7.5
Huanhuan Gao,Jianzhong Liu,Peihui Xu,Haiou Wang,Jianren Fan
Aluminum-lithium (Al–Li) alloys are crafted by incorporating minute quantities of Li into Al, thereby alleviating the passivation effect of dense alumina. This strategic blend elevates the energy release potential of Al-based fuels by enhancing reactivity and facilitating efficient combustion reactions. The effects of Li content and particle size on the combustion characteristics of Al–Li alloys are systematically investigated, with a particular focus on several pivotal aspects: thermal oxidation behavior, ignition delay time, combustion time, combustion intensity, temperature, and the condensed-phase products. The results show that, upon heating to 1500°C, the oxidation weight gain of Al–Li alloys reaches 6.5 times that of raw Al. This indicates that adding Li significantly enhances the extent of the oxidation reaction. Increased Li content and particle size reduction further accelerate the oxidation reaction. The ignition delay time and combustion time are effectively shortened, showing a more intense combustion process, higher flame temperature and more significant micro-explosion effect. Ultimately, these factors lead to a significant reduction in the size of condensed-phase products. Based on these insights, a comprehensive impact mechanism for the energy release of Al–Li alloys has been proposed, providing theoretical guidance for applying Al–Li alloys in related fields.
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
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IF 6.901
Haiming Li,Tailin Wang,Xue Wang,Guangda Li,Jianxing Shen,Jinling Chai
An Al-doped Na 2 FePO 4 F/mesoporous carbon nanonetwork derived from an metal–organic framework (MOF) material, was synthesized using a simple solid-state reaction method and evaluated as a promising cathode material for sodium-ion batteries. The MIL-53(Al) derived mesoporous carbon nanonetwork coating can enhance electron conductivity in Na 2 FePO 4 F cathode materials. The doping derived from MIL-53(Al) caused no damage to the crystal structure of the material, and Fe 2+ site was replaced by Al 3+ successfully. Therefore, the Al-doped Na 2 FePO 4 F/MOF-C composites exhibit substantial improvements in electrochemical performance in terms of rate capability and cycle performance. When current density increased from 0.1 C to 5 C, the specific capacity of Na 1.94 Fe 0.94 Al 0.06 PO 4 F/MOF-C only decreased from 115.2 mAh g −1 to 63.2 mAh g −1 ; thus, the composite presented outstanding rate capability. Moreover, an excellent capacity retention of 70.3% was maintained from the initial value of 70.4 mAh g −1 to 49.5 mAh g −1 after the 500th cycle at 5 C. This study provides insights into designing high-performance cathode materials by improving structural stability and the electrical conductivity induced by MOF-derived carbon coating and metal doping.
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DOI
高影响因子
CERAMICS INTERNATIONAL
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2022
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IF 5.532
Zhiyu Ma,Weijia Guo,Zhenxing Yue
TiO 2 -added Ba 4 (Sm 0.65 Nd 0.35 ) 9.33 Ti 17.75 Al 0.33 O 54 (BSNTA) ceramics were fabricated with a solid-state reaction method. Slight TiO 2 addition increased the dielectric constant ( ε r ) of BSNTA ceramics and brought about a near-zero temperature coefficient of resonant frequency ( τ f ). Sintering in oxygen increased the density of TiO 2 -added BSNTA ceramics and surprisingly concurrently improved the ε r and Q × f value. Thermally stimulated depolarization current (TSDC) measurements indicated that TiO 2 addition introduced oxygen vacancies ( V O .. ) and Ti Ti ' − V O .. defect dipoles and that an oxygen-sufficient sintering atmosphere decreased the concentration of these defects and thus increased Q × f values. From the viewpoint of defect behaviors, this observation offered original insight into the mechanism by which the sintering atmosphere had impacts on the Q × f value of titanate ceramics. Satisfying dielectric properties ( ε r = 79.5, Q × f = 14,840 GHz, τ f = 0 ppm/°C) were attained in oxygen-sintered BSNTA-0.6%TiO 2 ceramics that might be suitable for the manufacture of miniature microwave devices such as filters and antennas.
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DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2021
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IF 2.495
Ying-yue Qin,Qiao-ying Wang,Jin-Long Ge,Fang Wu
Amino-MIL-53(Al) (NH 2 -MIL-53(Al)) nanocrystals were successfully obtained through microwave ultrasound-assisted method. The structure and morphology of the as-synthesized NH 2 -MIL-53(Al) nanocrystals were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and N 2 adsorption–desorption isotherms, respectively. Upon excitation at 388 nm, the as-synthesized NH 2 -MIL-53(Al) nanocrystals show strong emission peak at 454 nm in n-octane solution at room temperature. Meanwhile, the fluorescence explorations revealed that NH 2 -MIL-53(Al) can selectively detect organosulfur compounds, including thiophene and benzothiophene through quenching effect in model fuel, with high quenching constant and low detection limit. This work presents a facile platform for the detection of organosulfur compounds in model fuel.
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DOI
高影响因子
ACS Applied Energy Materials
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2022
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IF 6.959
Yanxue Guan,Juan Qin,Xinyue Guo,Zongjia Li,Haoran Guo,Miaomiao Zhang,Bailin Zhang,Jilin Tang
Nickel-aluminum layered double hydroxides (Ni-Al LDHs) are widely used in energy storage and conversion devices, and the impact of the Ni/Al molar ratio on the structural evolution and kinetic process is of great significance for improving reaction kinetics and efficiency. In this paper, the morphological evolutions and nanomechanical property changes of Ni-Al-n LDH (n is the Ni/Al molar ratio) nanosheets during potential cycling were explored by in situ electrochemical atomic force microscopy. The conversion of Ni2+ into Ni3+ and the amphoteric properties of Al3+ during potential cycling resulted in the dissolution of Ni-Al-n LDH nanosheets. The dissolution rate of Ni-Al-2 LDH nanosheets was slower than those of Ni-Al-2.5 LDH and Ni-Al-3 LDH nanosheets. Meanwhile, the Young’s modulus value of the dissolved area was much larger than that of the undissolved area, and the dissolved area exhibited a harder property. It was attributed to the different microcrystalline structures of Ni-Al LDH nanosheets affected by the Ni/Al molar ratio and the rearrangement of Ni2+ and Al3+ during the reaction. The slow dissolution of Ni-Al-2 LDH nanosheets was beneficial to improving the electrochemical performance, while the fast dissolution of Ni-Al-2.5 LDH and Ni-Al-3 LDH nanosheets was not conducive to the electrochemical performance. Understanding the effect of the Ni/Al molar ratio on the morphological evolutions and nanomechanical property changes of Ni-Al LDH nanosheets during potential cycling has important guiding significance for the subtle compositional modification and structural design of Ni-Al LDHs as an electrode material.
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DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2021
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IF 6.789
Ziyi Shen,Jie Jin,Jingjing Fu,Meng Yang,Feihu Li
The co-occurrence of arsenic and fluoride in the water environment has led to many health concerns for living beings. Simultaneous removal of such ions is crucial to the safety of water resources , and biochar has been extensively engaged to address this issue. Here four magnetic biochars (mBCs) including pristine magnetic biochar and three aluminum (Al) and/or magnesium (Mg) oxides-anchored magnetic biochar (i.e., Al-mBC, Mg-mBC, and MgAl-mBC) were prepared via a facile pyrolysis method and then comprehensively evaluated as adsorbents for enhanced co-uptake of arsenate (As V ) and fluoride (F − ) from synthetic water. The mBC shows a high specific surface area of 205 m 2 g −1 , which dropped to 116, 80, and 114 m 2 g −1 upon the anchoring of Al, Mg, and Mg + Al, respectively. Our results suggest that the adsorption of either As V or F − is highly pH-dependent, and pH 4–6 is the optimal range for maximum adsorption. The adsorption isotherm data indicate that the MgAl-mBC adsorbent outranks all other mBCs for co-uptake of both As V and F − . The adsorption capacity maxima of MgAl-mBC are 34.45, and 21.59 mg g −1 for As V and F − , respectively (pH = 5, T = 10 °C), also highly outstripping other biochars reported in the literature. The magnetic feature of these mBCs enables us to fast reclaim and regenerate the exhausted adsorbents by an external magnet and dilute NaOH. The Al- and Mg-anchored mBCs are expected to be used as highly efficient adsorbents for environmental remediation of waters contaminated by both As V and F − .
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高影响因子
Journal of Environmental Sciences
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2016
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IF 2.208
Wenyu Wang,Shuang Zhao,Qinyan Yue,Baoyu Gao,Wen Song,Lijuan Feng
The objective of this study was to investigate the effect of different Al species and chitosan (CS) dosages on coagulation performance, floc characteristics (floc sizes, strength and regrowth ability and fractal dimension) and membrane resistance in a coagulation–ultrafiltration hybrid process. Results showed that different Al species combined with humic acid in diverse ways. Al a had better removal efficiency, as determined by UV 254 and dissolved organic carbon , which could be further improved by the addition of CS. In addition, the optimal dosage of different Al species was determined to be 4.0 mg/L with the CS concentration of 1.0 mg/L, by orthogonal coagulation experiments. Combining Al a /Al b /Al c with CS resulted in larger flocs, higher recovery, and higher fractal dimension values corresponding to denser flocs; in particular, the floc size at the steady state stage was four times larger than that obtained with Al species coagulants alone. The results of ultrafiltration experiments indicated that the external fouling percentage was significantly higher than that of internal fouling, at around 85% and 15%, respectively. In addition, the total membrane resistance was significantly decreased due to CS addition.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2021
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IF 3.764
Hongyu Niu,Yuan Cheng,Chuang Li,Shaojie Li,Jingjie Luo,Changhai Liang
Rational design of promising Cu catalyst requires better understanding of the Cu–support perimeter for reactions such as hydrogenation rearrangement of furfural─a pivotal and alternative transformation to produce cyclopentanol. Herein, a series of Cu catalysts with constructed Cu-M-Ox interfaces (M = Zn or Al) have been synthesized. In freshly reduced Cu/ZnO-Alx samples, aluminum species was enriched surrounding Cu. The Cu-Al-Ox contacting interface was formed, and the CuAl2O4 spinal structure was detected as a combining consequence only if Zn and Al species coexisted. The specific metal–support synergistic interaction and Cu-Al-Ox contacting interface simultaneously aroused the enhanced redox property and large number of surface acid sites, facilitating the adsorption/activation of hydrogen and reactants. During the reaction, Al2O3 retreating from the Cu-Al-Ox interface caused the replacement of Cu-Al-Ox by new Cu-Zn-Ox interface, which was directly correlated with the irreversibly changed chemical structure and decreased cyclopentanol yield, although the furfural conversion was well sustained. In this work, we confirmed that supported copper catalysts were competent for the activation and conversion of furfural, with the turnover frequency reaching 28.1 h–1 by the Cu/ZnO-Al3 sample at temperatures as low as 90 °C. The further transformation of cyclopentanone to cyclopentanol was largely depending on the maintenance of a steady Cu-Al-Ox contacting interface.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Yanhua Zhang,Xinglong Gao,Zijun Tang,Yuhang Mei,Xing Xiang,Jiadong Deng
The lithium dendrites growth in Li 7 La 3 Zr 2 O 12 (LLZO) solid electrolytes has severely restricted the development of all-solid-state lithium batteries. Herein, two different dynamic properties interlayers of electronically conductive Al and an electronically non-conductive Al 2 O 3 are constructed at the Li/LLZO interface, and the lithium dendrite growth mechanism is explored. Results show that battery with Al interlayer occur internal short circuit in 95 cycles, while the battery with annealed Al 2 O 3 interlayer has good cycle stability of 1000 cycles with polarization voltage below 0.1 V. Besides, dendritic lithium dendrites can be clearly observed at the LLZO grain boundaries of battery with Al interlayer. Raman and XPS results show that the Al 2 O 3 interlayer reacts with Li + during the charge and discharge process to form a Li-Al-O compound which is Li + conductive. It is concluded that the lithium dendrite inhibition mechanism of the Li-Al-O compound interlayer is that it can promote the Li + conduction from LLZO to lithium anode to undergo a lithium deposition reaction, and prevents electrons from conducting to LLZO and combine with Li + to occur lithium dendrite growth. While for the Al interlayer, electrons can reach LLZO through the interlayer to combine with Li + thus occurring the lithium dendritic growth.
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高影响因子
CHEMOSPHERE
·
2018
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IF 4.427
Wenyu Wang,Qinyan Yue,Ruihua Li,Fan Bu,Xue Shen,Baoyu Gao
This study investigated membrane fouling in a coagulation/ultrafiltration (C-UF) process by comparing the floc properties and humic acid (HA) removal efficiency of three hydrous Al(III) species (Al a , Al b , and Al c ). The results indicated that the coagulation and membrane mechanisms were different for all three Al species because of the differences in floc properties. The HA removal efficiency increased with increasing Al dosage until an equilibrium was reached at the optimal dosage of 6 mg L −1 . In addition, membrane fouling gradually decreased as the Al dosages increased. Regardless of coagulant type, the OH and COOH functional groups of HA reacted with the Al species. Both external and internal membrane fouling were strongly dependent on the porosity of the cake layer and on the size distribution of the floc particulates, respectively. The pore area of the cake layer formed by the Al a -coagulated effluent was large because of the strong charge neutralization. Moreover, Al a generated large and loose flocs with a porous cake layer that mitigated external fouling. However, the internal fouling with the Al c coagulant was significant because the concentration of residual aggregates in the membrane pores was high.
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高影响因子
KEY ENGINEERING MATERIALS
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2020
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IF 0
Jian Huang,Zhe Lei,Qian Zhang,Mei Juan Su,Liang Liu
Highly active Al-based Ag dendrites SERS plasmonic substrates have been rapidly synthesized by the one-step galvanic displacement reaction without the use of any surfactants and templates. The as-prepared SERS substrates were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Raman spectroscopy. XRD measurements confirmed the metallic nature of the formed Ag dendrites. None of the organic additives were used in the synthesis process, which ensures the substrates surfaces are completely clean and avoiding the introduction of organic contaminants. The innovative rough bionic substrates yield a final silver dendritic structure that offers large specific surface area and high-density hotspots. Using malachite green as a model target, the Al-based Ag dendrites SERS substrates exhibited acceptable reproducibility (relative standard deviation of 23.8%) and high enhancement capacities (pushed the detection limit down to 10 pM). Importantly, these Ag dendrites could potentially be employed as highly active and cost effective flexible SERS sensors for label-free ultrasensitive detection of biomolecules.
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DOI
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2021
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IF 5.816
Yanyan Wu,Zijuan Xie,Ying Li,Zhe Lv,Lingling Xu,Bo Wei
Developing efficient oxygen evolution reaction (OER) electrocatalysts with earth-abundant elements is very important for sustainable H 2 generation via electrochemical water splitting. Here we design a crystalline-amorphous Ni–Fe–Al hybrid phosphides nanosheet arrays grown on NiFe foam for efficient OER application. Dynamic surface reorganization of phosphides at anodic/cathodic polarizations is probed by in situ Raman spectroscopy . The reconstructed amorphous Ni(Fe)OOH species are determined as the active phases that facilitate the OER process. This unique electrode shows highly catalytic activity toward water oxidation , achieving the current densities of 10 and 100 mA cm −2 at 181 and 214 mV in 1 M KOH, respectively. Meanwhile, it also exhibits excellent stability at a large current density of 100 mA cm −2 for over 60 h. This work reveals the dynamic structural transformation of pre-catalyst in realistic conditions and highlights the important role of oxyhydroxides as real reactive species in OER process with high activity.
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DOI
高影响因子
危险品化学品经营许可证（带存储）