Journal of Cleaner Production
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2021
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IF 9.297
Aamir Hanif,Mingzhe Sun,Tianqi Wang,Shanshan Shang,Daniel C.W. Tsang,Jin Shang
NO 2 is a potent air pollutant because of its deleterious effects on human beings and other organisms. The state-of-the-art catalysis-based deNO x techniques (e.g., selective catalytic/non-catalytic reduction) are incapable of ambient NO 2 abatement due to their low efficiency at temperatures below 300 °C. It is thus conceivable to directly capture NO 2 from the atmosphere by selective adsorption on porous materials. This work reports the rational development and demonstration of the Mg–Al layered double hydroxides (LDHs) and their derived mixed metal oxides (MMO), using environmentally benign solvents , as high-capacity adsorbents for ambient NO 2 abatement. By boosting the densities of accessible basic sites using layer delamination strategies, the highest NO 2 adsorption capacity of 8.52 mmol/g was achieved by the delaminated LDH material (LDH-AM), which was substantially higher than other popular and robust adsorbents, such as zeolites (0.36–3 mmol/g) and carbon-based adsorbents (2–6 mmol/g). Using Fourier transform infrared spectroscopy and powder X-ray diffraction, it was revealed that NO 2 adsorption occurs on the surface M-OH basic sites and within the layers by simultaneously replacing the interlayer CO 3 2− ions of LDH. This work affords not only promising, durable, and scalable adsorbents for ambient NO 2 removal but also a strategy to develop adsorbents with high density of basic sites for capture of other pollutant acid gases from the environment.
研究领域:
材料科学
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环境科学
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Journal of Material Cycles and Waste Management
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2023
·Vol. 25
·期 4
·2485-2497
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IF 3.1
Wei Jie,Liu Zhanwei,Yan Hengwei,Yang Wanzhang
Herein, fluorine fixation, nitrogen removal, and the alkaline solution recovery of alumina were studied using calcium-based high-temperature soda roasting. In addition, the effects of roasting conditions, dissolution conditions, and additives (carbon alkali and calcium salt) on fluorine fixation and alumina recovery were studied. The results show that when the roasting temperature was 1100 ℃ and the roasting time was 2 h, the dissolution temperature was 80 °C, while the dissolution time was 20 min. The ratio of soda to dross was 1.0, and 30 wt% CaCO 3 had been added as a fluorine fixing agent. The Al extraction rate from aluminum dross (AD) reached 86.21%, the denitrification rate reached 99.54%, the concentration of soluble fluoride ion was reduced to 0.111 g·L −1 , and the fluoride fixation rate was 75.04 wt%. CaF 2 is the main component of the leaching residue, which can be added as an insulation material for electrolysis. Alkaline oxidation roasting and calcium-based fluoride fixation are effective methods to separate aluminum, fluoride, and nitrogen. This study provides a new method for the safe and efficient utilization of AD.
研究领域:
化学工程
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环境科学
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材料科学
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Surfaces and Interfaces
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2026
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IF 6.3
Yuezhong Zhang,Shiliang Jiang,Bin Li,Guoyong Wang,Shaohua Zhang,Pengpeng Wu,Baosheng Liu
Despite aluminum alloys are widely employed in concrete environments, such as in nuclear spent fuel casings and concrete formwork, they remain susceptible to severe corrosion and adhesion caused by concrete, which considerably shortens their service life. The development of low-adhesion superhydrophobic coatings offers a highly promising strategy to enhance both corrosion resistance and anti-adhesion performance. Here, a low-adhesion superhydrophobic coating is fabricated on 6061 aluminum alloy via a facile and scalable spray-coating process. A robust epoxy-based composite reinforced with hydrophobic SiO 2 and glass fibers (GF) is employed, achieving a water contact angle of 156.2°. A glass fiber skeleton interwoven with SiO 2 nanoparticle constitutes a micro‑nano hierarchical structure, which together with low surface energy established a stable Cassie–Baxter state. This hierarchical structure traps an air cushion at the interface, significantly reducing the actual contact area between corrosive media and the substrate. As a result, the coating effectively resists adhesion from both dry cement powder and wet cement slurry, demonstrating notable self-cleaning and anti-adhesion performance. Electrochemical tests conducted in simulated concrete interstitial solution showed that the low-frequency impedance modulus of the superhydrophobic coating increased by more than four orders of magnitude, with a protection efficiency of 99.85%. Moreover, the low adhesion superhydrophobic coating also possesses outstanding mechanical durability, thermal stability, and chemical stability. Therefore, the low-adhesion coating shows great potential for the durable application of aluminum alloy in concrete environment.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Deping Xia,Wei Wang,Jingzhou Liu,Hualin Lin,Sheng Han
The Mg/Al hydrotalcite with different morphologies was prepared under mild conditions through a coprecipitation process. The sulfur- and phosphorus-free MA2 nanosheets were used in combination with MoDTC to improve the low load-bearing capacity and unsatisfactory tribological properties of organic molybdenum in PAO8. Especially, the 2.0 wt % MA2 nanosheets combined with 2.0 wt % MoDTC demonstrated the highest friction performances in PAO8. The results indicated that the synergistic effect between MA2 and MoDTC contributes to the formation of a stable tribofilm composed of MoS2, MgO, Al2O3, MoO3, Fe2(SO4)3, Fe2O3, and Fe3O4. This tribofilm not only could effectively protect the friction interface and provide friction-reducing and antiwear effects but also possess high film-forming rates (PB value) and load-bearing capacity.
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FirePhysChem
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2026
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IF 5.1
Jing Li,Qian Li,Jia Dang,Hai Nan,Yuanyuan Li,Bo Liu,Yinghui Ren,Haixia Ma
Uniform DNTF/Al/NC energetic composite fibers with evenly dispersed components were prepared by electrospinning. • The interconnected fibrous framework accelerates the heat and mass transfer. • Electrospun fibers exhibit better combustion performance and safety performance. Although 3,4-dinitrofurazanfuroxan (DNTF) is a prominent high-energy explosive, its high mechanical sensitivity compromises its safety and limits the wide scale application in advanced solid propellants. To address this issue, DNTF/Al/Nitrocellulose (NC) energetic nanocomposite fibers with different NC contents were fabricated by electrospinning technology. The microstructure, morphological characteristics, and chemical composition were fully characterized by SEM, XRD, FT-IR, and XPS. SEM results confirm that the sample containing 40 wt % NC achieves uniform component dispersion and effectively reduces particle agglomeration, presenting the optimal morphological structure. The thermal decomposition behavior, combustion performance and mechanical sensitivity of the DNTF/Al/NC energetic nanocomposite fibers were systematically investigated in comparison with physically mixed composites. Benefiting from the continuous fibrous network structure, the DNTF/Al/NC energetic nanocomposite fibers exhibited accelerated heat and mass transfer kinetics, as evidenced by sharper exothermic peaks and intensified heat release behavior during thermal decomposition. Combustion tests demonstrate that the optimized composite delivers a shortened ignition delay time from 37.45 s to 31.80 s, and an elevated combustion temperature from 230.7 °C to 268.2 °C, realizing remarkably enhanced energy release efficiency. Moreover, the critical friction load increases from 216 N to 252 N and the impact sensitivity drop height increases from 35 cm to 45 cm, which verifies the significant reduction in mechanical sensitivity and prominent improvement in operational safety. In summary, the electrospun DNTF/Al/NC energetic nanocomposite fibers combine high energy release capacity with excellent safety performance. This facile structural modulation strategy offers a new approach to the rational design and controllable preparation of high performance energetic composite materials with balanced energy and safety. Download: Download high-res image (416KB) Download: Download full-size image
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FirePhysChem
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2026
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IF 5.1
Ying-Nan Dong,Yi-Fan Jiang,Wei-Qiang Pang,Feng-Qi Zhao,Ding Liu,Jing-Ni Wang,Chang Nie,Wen-Gang Qu
Enhancing the combustion efficiency of aluminum (Al) is a crucial research direction for solid propellants. Constructing an efficient fuel-oxidizer interaction environment through interfacial regulation is an effective approach. In this work, a synergistic strategy integrating polyvinylidene fluoride (PVDF)-mediated interface regulation with core-shell structuring was adopted to fabricate a dual-layer core-shell Al@PVDF@HMX composite energetic materials (EMs). This composite exhibits an ultra-high heat of explosion (8416.8 J·g⁻¹), which is over 52.8% higher than that of the Al+HMX physical mixture. Explosion residue measurements show that the primary combustion products were AlN and Al₂O₃, and no large Al agglomerations were detected, meaning that the inhibition of Al particle agglomeration by the dual-layer core-shell structure and the shell-breaking combustion effect induced by PVDF should be the key factors for the heat of explosion enhancement. Simultaneously, it was demonstrated that the composite is superior safety to HMX, as its impact sensitivity (8%) and friction sensitivity (36%) are decreased by 91% and 64%, respectively. This work indicates that the dual-layer core-shell structured Al@PVDF@HMX can synergistically improve the reaction between Al and HMX, providing a new approach to improve the energy efficiency and safety of EMs.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2026
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IF 4.8
Haozhe Yang,Mo Yang,Fangrong Hu,Mingzhu Jiang,Longhui Zhang,Shangjun Lin,Ziheng Zhi,Wanting Zhu,Chenxi Liu,Lei Li
A MIL-53(Al)-functionalized terahertz metasurface sensor was developed for the room-temperature detection of styrene, a potential volatile biomarker associated with lung cancer. The sensor combines the localized electromagnetic field enhancement of the terahertz metasurface with the adsorption enrichment capability of MIL-53(Al). Benefiting from the flexible one-dimensional channels, the size-compatible pore environment of MIL-53(Al), and the possible π–π and host–guest interactions between styrene molecules and the terephthalate linkers, the functionalized metasurface exhibits an enhanced sensing response toward styrene. APTES was introduced as an interfacial coupling layer to improve the immobilization and dispersion of MIL-53(Al) nanocrystallites on the metasurface. SEM and FTIR characterizations confirmed the formation of a nanocrystallite-stacked MIL-53(Al) coating and the successful introduction of both APTES and MIL-53(Al) onto the sensor surface. The optimized sensor achieved a sensitivity of 0.37 GHz/ppm and a limit of detection of 1 ppm within the concentration range of 1–100 ppm. In addition, the sensor showed good selectivity against several interfering VOCs, as well as acceptable repeatability and stability. This work provides a feasible strategy for integrating flexible MOF adsorbents with terahertz metasurfaces, offering a potential platform for rapid, label-free, and room-temperature detection of trace aromatic VOCs.
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PubMed
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2026
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IF 3.3
Wang Jiajun,Miao Yuanyuan,Wang Peng,Tao Xiaoxia,Bo Fan,Xu Yunzhao,Zhao Lingling,Zhang Caihang,Chen Yang,Tan Li,Tsubaki Noritatsu
For the industrially promising reaction of CO 2 hydrogenation toward methanol, Cu/Zn/Al-based catalysts present a potential candidate, where the surface active structure dictates the catalytic performance, guiding ongoing research into structure–activity relationships. Herein, a series of CuZn x Al y (where the mol ratio of Zn/Cu = x , mol ratio of Al/Cu = y ) catalysts with varying compositions was synthesized via a coprecipitation method. Physicochemical characterization revealed that a small amount of Al (CuZn 0.56 Al 0.04 ) enhanced the specific surface area, improved the dispersion of Cu and Zn species, and optimized the Cu + /Cu 0 ratio, as evidenced by N 2 physisorption, XRD, and XPS analyses. In contrast, excessive Al content (CuZn 0.23 Al 0.83 ) led to a decline in surface area, pore volume, and surface exposure of active Cu and Zn species. Catalytic performance tests showed that CuZn 0.56 Al 0.04 achieved the highest CO 2 conversion (16.2%), methanol selectivity (56.3%), and methanol space–time yield (STY) (438 g MeOH kg cat −1 h −1 ), outperforming that of the commercial CuZnAl catalyst. In situ DRIFTS studies confirmed that methanol synthesis proceeded via a formate (HCOO) mediated pathway, with the optimal catalyst demonstrating superior efficiency in converting key intermediates (HCO 3 *, CO 3 *, HCOO*) to the final product. The study establishes that tailored Al content is crucial for modulating catalyst surface properties and ultimately promoting catalytic performance for methanol synthesis from CO 2 . Graphical abstract An optimal Al content in co-precipitated CuZn x Al y catalysts optimizes the surface active structure, enabling efficient CO 2 -to-methanol hydrogenation via the formate pathway.
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CERAMICS INTERNATIONAL
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2026
·
IF 6
Longgong Xia,Zhiqian Yu,Feng He,Yiwang Zhang,Huilan Yang,Kai Ma
(Fe/Zn/Ni)O·(Fe/Al) 2 O 3 spinels are widely used as raw materials for advanced ceramics and refractories and occur as precipitates in slag phases during nonferrous metal pyrometallurgy. The stability and phase-transformation mechanisms of these spinels are important for optimizing material performance and controlling metallurgical processes. The decomposition of Fe 3 O 4 , FeAl 2 O 4 , ZnFe 2 O 4 , ZnAl 2 O 4 , NiFe 2 O 4 , and NiAl 2 O 4 under various atmospheres was experimentally investigated, and phase evolution during reduction was elucidated. Thermogravimetric and differential thermal analyses and reduction experiments showed that Fe(II)-bearing spinels tended to decompose at elevated temperatures in air. ZnFe 2 O 4 and ZnAl 2 O 4 were stable at temperatures up to 1500 °C in air and in an atmosphere with p O2 = 10 −6 atm. At low oxygen partial pressure, aluminate spinels exhibited greater stability. The reduction kinetics of these spinels were also analyzed. The reduction of Fe 3 O 4 , ZnFe 2 O 4 , NiFe 2 O 4 , and NiAl 2 O 4 was described by the Avrami-Erofeev model, indicating that the reduction process was controlled by the nucleation rate. The reduction of ZnAl 2 O 4 was described by a diffusion model.
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COMBUSTION AND FLAME
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2026
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IF 5.9
Hongxia Zhang,Yaozhong Ran,Jiawang Shuang,Jiaru Zhang,Zhenyu Zhou,Pengcheng Zhang,Zhenhui Liu,Fei Xiao,Chongwei An
The ignition process of aluminum powder significantly affects propellant combustion and agglomeration, making the control of ignition through adjusting the surface coating thickness an effective strategy. In this study, core-shell Al@PTFE composites with tunable PTFE shell thickness were successfully synthesized via plasma pretreatment combined with emulsion polymerization. Characterization results demonstrate that the PTFE shell thickness in Al@PTFE can be precisely regulated from 58 nm to 286 nm, corresponding to a mass fraction range of 4.6 wt% to 16.7 wt%. It was found that the PTFE coating not only effectively lowers the laser ignition threshold and shortens the ignition delay of aluminum but also enhances its ignition performance under high-temperature conditions. The underlying mechanism is that the abundant reactive fluorine species released during the thermal decomposition of PTFE can remove the surface Al₂O₃ oxide layer to form AlF₃, thereby significantly reducing both the ignition temperature and delay time. However, in propellant applications, although Al@PTFE composites significantly mitigate aluminum particle agglomeration during combustion, they simultaneously lead to a decrease in the overall burning rate and combustion temperature of the propellant. The tunable shell thickness strategy demonstrated here opens a new avenue for developing high‑performance aluminum fuels with controllable ignition and agglomeration characteristics for solid rocket propulsion.
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Journal of Energy Storage
·
2025
·
IF 9.8
Yongyang Zhu,Shun Wang,Yanwu Chen,Feng Liu,Libing Guo,Yingxi Wei,Guijing Xiao,Qing Zhou,Longwen Chen
The hydrolysis of lithium borohydride (LiBH 4 ) is very promising for on-site hydrogen generation to supply hydrogen since it has appealing features such as a high hydrogen capacity (13.9 wt%, water included), fast hydrogen evolution rate, and mild reaction conditions. The large-scale application of LiBH 4 , however, is restricted by its difficult regeneration from stable hydrolytic products (LiBO 2 · x H 2 O), which requires expensive reducing agents such as MgH 2 , high energy-consuming dehydration process for LiBO 2 ·2H 2 O, and additional hydrogen input. Herein, we develop a facile method to directly regenerate LiBH 4 from LiBO 2 ·2H 2 O by ball milling with low-cost Al-rich alloys as reductants and Li 2 O as additives, balancing efficiency and economy well. Introducing Mg (or Ca) into Al to form Al-rich alloys optimizes the mechanical brittleness and chemical reducibility, which facilitate the crushing, collision, and reaction of reactants and the conversion of H + to H − . The specific mechanism study illustrates that Mg in Al 3 Mg 2 preferentially reacts and the in-situ derived Al with fresh surface and fine size is highly active for reductive regeneration of LiBH 4 . Besides, a little addition of Li 2 O suppresses the formation of “boron sink”, [B 12 H 12 ] − , further increasing the yield of LiBH 4 . This work evidences the regeneration potential of Al-based reducing agents on metal borohydrides.
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INFRARED PHYSICS & TECHNOLOGY
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2025
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IF 3.4
Tingzhen Chen,Quanjiang Lv,Siwei Liu,Haigang Hou,Guiwu Liu,Junlin Liu,Guanjun Qiao
The advancement of infrared-visible compatible stealth materials is pivotal for strengthening national defense security and driving the next frontier in stealth material technologies. Here, we propose a modification strategy for Al/porous SiO 2 (Al/p-SiO 2 ) composite films by incorporating Ag particles to modulate their spectral response, thereby achieving infrared-visible compatible stealth. The most outstanding Al/p-SiO 2 /Ag-20 exhibits excellent thermal stability, with emissivity of 0.27 in the mid-wave infrared (3-5 μm) and 0.19 in the long-wave infrared (8-14 μm) bands. In addition, compared with Al/p-SiO 2 , its visible reflectivity is reduced by 0.35, reaching as low as 0.38 (380-780 nm). To meet diverse application requirements, flexible and patterned Al/p-SiO 2 /Ag-20 composite film was fabricated, exhibiting excellent stealth performance, particularly suitable for wearable devices and fabrics. It is worth mentioning that the fabrication of Al/p-SiO 2 /Ag composite films only requires a simple, low-cost and scalable process, which provides a solid foundation for large-scale application of infrared-visible compatible stealth materials.
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