Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 41
·35727-35735
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IF 9.5
Xiaoyu Wang,Ben Ma,Xuehui Shangguan,Qinglei Wang,Ping Li,Li Su,Yi Zhao,Yufei Wei,Haixin Zhang,Jie Gao,Faqiang Li
Lithium–aluminum layered double hydroxides (Li/Al-LDHs) have achieved successful industrial-scale application in lithium extraction from salt lakes due to their excellent structural stability, high selectivity and environmental friendliness. However, they suffer from limited adsorption capacity. Herein, this issue can be effectively resolved by precise regulation of the LDH nucleation strategy, thereby controlling oxygen species content. The Li/Al-LDHs are synthesized via a one-pot precipitation method, and the nucleation conditions, including Al/Li ratio, crystallization temperature and terminal pH, are systematically optimized through crystal growth analysis, adsorption performance evaluation, and structural stability characterization. The results confirm that the adsorption capacity of Li/Al-LDHs is critically dependent on the pH value attained at equilibrium. Notably, the terminal pH simultaneously governs Al(OH)3 nucleation and Li+ intercalation through oxygen speciation control. The elevated active oxygen content (38.65%) enhances hydrophilicity (contact angle 22.5°) and strengthens lithium-ion diffusion kinetics. The density functional theory (DFT) calculation further indicates that high levels of active oxygen (37.5%) facilitate low formation energy (−3.527 eV) and adsorption energies (−0.739 eV), confirming the correlation between the structure and Li active sites. What's more, the prepared Li/Al-LDHs show outstanding lithium adsorption performance with a maximum adsorption capacity of 13.42 mg g−1 in East Taijinar salt-lake brine. The separation coefficients of Na+, K+, and Mg2+ are 395.86, 140.89, and 121.69, respectively. This study provides vital insights for advancing high-performance aluminum-based lithium adsorbents.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Peibo Li,Guoqiang Luo,Guinan Zhao,Huawu Liu,Yi Sun,Qiang Shen
Al powder is prone to oxidation, which can introduce impurities in powder metallurgy. In this study, Al 2 O 3 nanonetworks were obtained by destroying the oxide layer through Paulse Activated Sintering (PAS). The network and the nano-precipitation enhance the mechanical properties of Al-Cu-O composites. TEM analysis revealed the formation of CuAl 2 and an Al 2 O 3 network at the grain boundaries. The current facilitated the modulation of the intermetallic compound size and the fragmentation of the oxide layer. The current-induced discharge at the particle interfaces generated localized heating. Higher temperature effectively disrupts the oxide layer. The Al 2 O 3 network improved the fracture toughness of the Al-Cu-O composites by passivating crack propagation. Simultaneously, the current reduced the nucleation barrier for precipitation by promoting directional atomic migration. Uniformly dispersed nano-precipitates are conducive to the improvement of strength. This study provides new insights into oxidation-related challenges in Al powder.
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JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
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2025
·
IF 2
Yin Yanjun,Yang Chao,Hei Jinpei,Cheng Lehua,Li Lei,Yin Xiaojie,Zhang Yang,Ma Zili
By utilizing the advantages of easy film-forming properties and high fluoride content of polyvinylidene fluoride (PVDF), vacuum spin-coating technology was used to prepare PVDF@Al/CuO self-supporting energetic film with different PVDF addition amounts. The films such as PVDF_2@Al/CuO, PVDF_4@Al/CuO, PVDF_6@Al/CuO, and PVDF_8@Al/CuO were obtained with different coating layers. The composition, structure, morphology, and hydrophobicity of the samples were studied using x-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and contact angle measurement equipment. The combustion behavior and heat release performance of PVDF@Al/CuO energetic thin films were investigated by high-speed cameras and differential scanning calorimetry (DSC) technology. The results showed that the surface of PVDF@Al/CuO energetic thin film is the smoothest, most even, and self-supporting when the PVDF content was 8%. The static contact angle on the left side of the energetic film is 103.7°, and the static contact angle on the right side is 104.1°, indicating a certain degree of hydrophobicity. Additionally, the PVDF_8@Al/The CuO film with 7 coating layer burns violently, releasing a heat of 5890 J g −1 with over pressure of 559 KPa. Our results highlight the application of PVDF as additive to prepare self-supporting energetic films by spin coating.
研究领域:
材料科学
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化学工程
·
能源化学
·
应用物理
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zhuang Liu,Xinyang Cai,Sandra Dirè,Emanuela Callone,Xiaolin Zhang,Jinming Luo,Francesco Parrino,Dawei Wang
The rapid development of semiconductor and electronics industries have urged novel adsorbents for fluoride removal from wastewater. In this study, we developed a metal-organic framework filter by in-situ implanting MIL-96(Al) onto Al mesh, which demonstrated effective and stable fluoride removal over a wide range of pH (3−11). The solid state nuclear magnetic resonance (NMR) and X-ray photoelectron spectroscopy (XPS) results revealed that the different structural changes to which Al3 sites are subjected upon pH modifications trigger fluoride adsorption through Lewis interactions at acidic pH values and through ligand exchange mechanism at neutral/alkaline pH values. Moreover, the filter demonstrated limited Al ions leakage and satisfactory adsorption selectivity towards fluoride among chloride, nitrate, and sulfate, at concentrations up to 50-times higher than fluoride. As a proof of concept for practical applications, the developed filters were sealed in tandem into a home-made filter holder and tested for fluoride removal from real industrial wastewater. When 12 filters were used, fluoride concentrations decreased from 5.8 mg/L to below 1.5 mg/L after 10 min of hydraulic retention time in the filter holder over 5 consecutive cycles. We hope this work may provide new insights for the design of novel absorbents for fluoride removal.
研究领域:
环境科学
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材料科学
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化学工程
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水处理技术
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吸附科学
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Nanomaterials
·
2025
·Vol. 15
·期 12
·885
·
IF 4.3
Chen Wu,Yuandong Xia,Kejing Song,Yongda Cao,Chenzhi Huang,Jiayi Chen,Yuan Wang,Chunliu Xu
Na2Ti3O7(NTO), with low sodium insertion potential (~0.3 V vs. Na+/Na) and potential for high-energy-density batteries, is regarded as one of the most promising anode materials for sodium-ion batteries (SIBs). However, its practical application is hindered by poor electronic conductivity, sluggish Na⁺ (de)intercalation kinetics, and interfacial instability, leading to inferior cycling stability, low initial Coulombic efficiency, and poor rate capability. In this work, micron-sized rod-like NTO and Al-doped NTO (NTO-Al) samples were synthesized via a one-step high-temperature solid-state method. Al doping slightly reduced the size of NTO microrods while introducing oxygen vacancies and generating Ti3+, thereby enhancing electronic conductivity and reducing ionic diffusion resistance. H2-TPR confirms that doping activates lattice oxygen and promotes its participation in the reaction. The optimized NTO-Al0.03 electrode delivered a significantly improved initial charge capacity of 147.4 mA h g−1at 0.5 C, surpassing pristine NTO (124.7 mA h g−1). Moreover, it exhibited the best cycling stability (49.5% capacity retention after 100 cycles) and rate performance (36.3 mA h g−1at 2 C).
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PubMed
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JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Yanhua Zhang,Fei Chen,Rong Tu,Qiang Shen,Lianmeng Zhang
High performance lithium ion conducting Li 7 La 3 Zr 2 O 12 solid electrolytes are prepared for the first time by field assisted sintering technology (FAST). The effect of sintering temperature on the phase compositions , microstructure and Li ionic conductivity is systematically investigated. The results show that pure cubic phase LLZO can be obtained at a range of temperatures from 1100 to 1180 °C for no more than 10 min. For the sample sintered at 1150 °C, a maximum relative density of 99.8% with a total ionic conductivity as high as 5.7 × 10 −4 S cm −1 are obtained at room temperature . This value is the highest among the present research. Compared with the traditional preparation methods, the current FAST is very promising to obtain high performance LLZO for its advantages of very short sintering time , a single preparation step of reaction-densification processing, and relatively lower sintering temperature.
研究领域:
材料科学
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能源科学
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Materials Research Express
·
2019
·Vol. 6
·期 10
·105316
·
IF 1.449
Ruoyu Liu,Chuanbing Huang,Lingzhong Du,Hao Lan,Shige Fang,Weigang Zhang
Aluminium/polyimide (Al/PI) powders were prepared via in situ. Al/PI composites were fabricated by hot pressing technology at 723 K for 30 min under Ar. The microstructure, thermal stability and tribological properties of Al/PI composites were investigated. SEM images showed that Al particles were wrapped in the composite with no gap. According to the TG analysis, 15Al/PI composite showed excellent thermal stability up to 773 K. Meanwhile, 15Al/PI composites exhibited excellent tribological behaviour at high temperature, especially at 773 K. The friction coefficient of 15Al/PI composite at 773 K was about 0.28 which was lower than that of pure PI (about 0.41). The wear rate of 15Al/PI composite at 773 K was about 65 × 10−5 mm3 Nm−1. The tribological properties of Al/PI composites was improved at high temperature. In the process of sliding tests, Al particles were transferred to the Ti-6Al-4V alloy's surface and PI particles were pressed on the composite's surface. The transfer of Al can protect Ti-6Al-4V alloy from wear and reduce the friction coefficient during the sliding test.
研究领域:
材料科学
·
摩擦学
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Rongkai Du,Xulin He,Yuefei Xiang,Junfu Tang,Lei Zhou,Juncheng Zhang,Tianying Sun,Mingmei Wu
The development of self-powered and non-pre-irradiation mechanoluminescent (ML) materials holds significant promise for achieving dynamic and real-time visualized stress distribution display. In this work, isomorphic ML materials Sr 3 MO 4 F:Ln 3+ (M = Al, Ga) were synthesized that exhibit repeatable ML without the need for pre-irradiation. These materials present non-piezoelectric and non-trap-controlled ML behaviors, resulting from contact electrification due to the interaction between phosphor and polydimethylsiloxane polymer under stress. Given the similar crystal structures and spectral properties, we substitute the complex measurements of electron transfer in the contact electrification process with straightforward theoretical modeling and calculations to elucidate the origins, mechanisms, and processes of interfacial triboelectrification-induced ML behaviors between Sr 3 MO 4 F phosphors and PDMS polymers. The experiments and density functional theory (DFT) calculations indicate a positive correlation among transferred charge, surface triboelectric potential, and ML intensity. This work not only introduces a new class of ML materials but also makes an effort at establishing and harmonizing the structure-performance relationships for triboelectrification-induced ML materials.
研究领域:
材料科学
·
物理学
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JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 24
·11013-11025
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IF 4.682
Luo Guoqiang,Li Peibo,Hu Jianian,Guo Jingwei,Sun Yi,Shen Qiang
The purpose of this paper was to design an Al–Cu–Ag–C material system to address the deterioration of mechanical properties caused by intermetallic compounds generated during Al–Cu sintering. The in situ pyrolytic C layer was encapsulated on the surface of the raw material particles, which prevented Al–Cu diffusion and reduced the generation of intermetallic compounds. The microstructure of the Al–Cu–Ag–C composites illustrates that several alloy phases of Al 2 Cu, Al 4 Cu 9 , and Ag 2 Al are formed. The addition of Ag significantly improved the mechanical properties of the composite due to the formation of the Ag 2 Al phase and Cu–Ag solution. The tensile strength and compressive strength of Al–52Cu–3Ag–C are increased by 123.9% and 64.9% over Al–52Cu–C, and the strain is also considerably improved. The strength enhancement derived from the Orowan strengthening contributed by Ag 2 Al, and the solid solution strengthening contributed by Ag–Cu solid solution, respectively. The presence of Ag 2 Al also enhances the hardness of the composite.
研究领域:
材料科学
·
力学
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PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2012
·Vol. 209
·期 8
·1538-1542
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IF 1.463
Chundong Li,Jinpeng Lv,Bo Zhou,Zhiqiang Liang
We systematically studied the influences of annealing atmosphere on the structural and optical properties of Al-doped ZnO (AZO) powders by performing anneals in N 2 , Ar 2 , H 2 and O 2 atmospheres. The results indicated that the optical properties were highly influenced by the annealing atmosphere, which were more pronounced for the AZO powders annealed in forming gas and an oxygen atmosphere. The E 1 (LO) vibration mode in the Raman spectra exhibits a good correlation with the green emission and is demonstrated to be originated from V O defects. We conclude that both V O and O i defects give rise to the green photoluminescence in ZnO, and each will play a dominant role in oxygen-deficient and oxygen-rich environments, respectively.
研究领域:
材料科学
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光电子学
·
半导体物理
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zheng Zhu,Linlin Qin,Yulong Liu,Qiqi Zhang,Peng Cheng,Wenyan Liang
Lanthanum (La) is constantly used in phosphorus removal due to its high affinity with phosphate. Herein, a novel La/Al bimetallic organic framework was developed to improve the usage efficiency of La species. The effects of metal ratio, pH value and competitive anions were investigated, through which the adsorption mechanism was further explained. Results showed that when the doped La:Al ratio was 1:3, the absorbent (La 1 Al 3 -BTC) achieved the most excellent adsorption capacity of 210.3 mg P·g −1 and usage efficiency (P/metal ratio = 1.09). La 1 Al 3 -BTC can adapt to the wide pH range and multitudinous coexisting ions in real water, and its adsorption process was in accordance with Langmuir and pseudo-second-order models. Surface morphology of materials transformed from rod-like crystal to amorphous structure as the increase of Al doping. La replaced some Al atoms and embedded in Al-BTC skeleton. The specific surface area raised from 9.27 m 2 ·g −1 of La-BTC to 257.01 m 2 ·g −1 of La 1 Al 3 -BTC. The main mechanism for the adsorption of phosphate was the inner-sphere complexation occurred in the La active sites. Electron migration between different metals enhanced the adsorption process. Density-function theory (DFT) calculation well matched the experimental phenomenon. Overall, the development of La 1 Al 3 -BTC presented new potential applications for enhanced phosphorus removal and provided new insights for the design of La-based adsorbents.
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Journal of Energetic Materials
·
2023
·
IF 2.1
Jin-Qiang Zhou,Yi-Ming Wang,Hua Fang,Peng Deng,Jian-Xin Nie,Xue-Yong Guo,Rui Liu
The design and preparation of new high-energy composite DAP-4/Al is very important for the study of composite solid propellants. In this work, the combustion properties and reaction mechanism of DAP-4/Al composites doped with WO3 nanoparticles were studied. DAP-4/Al composites were prepared by different mass ratios. The combustion state, combustion time, pressure, pressurization rate and flame temperature of DAP-4/Al/WO3 with different mass ratios were monitored. The results show that the combustion performance of DAP-4/Al can be significantly improved under the catalysis of WO3. Compared with DAP-4/Al-5, the average combustion time of DAP-4/Al/W-4 is significantly reduced by ~ 70 ms, the average combustion pressure is increased by 654 KPa, and the average pressurization rate is increased by 0.22 MPa·s−1. Under the catalysis of WO3, the activated substances can react rapidly with H2dabco2+ and NH+ to produce CO2, CO, N2 and H2O. When the mass ratio is 20:80:2, the average maximum combustion heat of DAP-4/Al/W-4 is 8474 J/g, which is higher than 493 J/g of DAP-4/Al-5. The reaction mechanism of WO3 catalyzed DAP-4/Al system was further analyzed by TG-MS and XPS. This work provides a new idea for the future application of DAP-4/Al composites in solid propellants.
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