THERMOCHIMICA ACTA
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2025
·
IF 3.5
Zhong-xuan Han,Hao Liu,Zhan-jun Yang,Yi-fan Guo,Shu-na Zhao,Mi Li,Lin Jiang,Andrei Rotaru
Aluminised thermites show strong potential for energy-intensive applications, but ensuring stable nanoscale dispersion and optimising combustion performance is challenging. This study prepared Al–MO/PVDF thermites (MO = ZnO, ZnFe₂O₄) by electrospraying and mechanical mixing to compare how particle morphology and compositional uniformity affect reactivity. Electrosprayed samples formed near-spherical, submicron particles with homogeneous distributions of reactants, whereas mechanically mixed samples aggregated into larger, irregular clusters. Differential scanning calorimetry revealed sharper, staged exothermic peaks in the electrosprayed thermites, indicating enhanced reactant contact, while the mechanically mixed thermites produced broad, overlapping exotherms. X-ray diffraction showed partial amorphisation and core-shell formation under rapid solvent evaporation. Laser ignition tests demonstrated faster ignition, higher flame temperatures, and more intense combustion in electrosprayed formulations, particularly Al–ZnFe₂O₄/PVDF, which exhibited a secondary heat release (micro-explosion). Electrospray-assisted fabrication improved homogeneity and promoted rapid, high-temperature reactions for enhanced combustion performance.
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JOURNAL OF SOLID STATE CHEMISTRY
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2025
·
IF 3.5
Qin Jiao,Bingchuan Gao,Li Zhang,Mingjuan Han,Hui Wan,Guofeng Guan
In this study, lithium zirconate (Li 2 ZrO 3 )-based materials with varying Al doping levels were synthesized via an oxalic acid sol-gel method, and their CO 2 capture performance was evaluated in a high-temperature fixed-bed reactor. The findings revealed that the CO 2 capture performance improved notably, rising from 1.43 mmol/g to 2.05 mmol/g, as the Al doping concentration was elevated. Moreover, the Al-doped Li 2 ZrO 3 exhibited excellent cyclic stability, maintaining over 90% of its initial CO 2 capture capacity after 10 sorption/regeneration cycles at 600°C. The synthesized samples were systematically analyzed through multiple advanced characterization techniques. The findings confirmed that oxygen vacancies (OVs) generated during the Al 3+ -induced substitution of Zr 4+ not only enhance CO 2 chemical sorption but also accelerate surface reaction kinetics by facilitating the migration of oxygen ions and lithium cations during the carbonate formation stage. The kinetic fitting results indicated that the Avrami model could well describe the sorption process ( R 2 =0.9951). Reaction kinetic analysis revealed that indicated that the CO 2 sorption process was driven by a combination of physical sorption and chemical reaction mechanisms. This study provides important theoretical foundations and experimental support for the application of Li 2 ZrO 3 -based materials in carbon dioxide capture.
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Materials Today Communications
·
2025
·
IF 4.5
Kang Li,Guoge Zhang,Wenfang Li,Shuoxun Jin,Ken Chen,Aihua Yi,Zhongmiao Liao,Wen Zhu,Yi Huang,Zhisheng Zhu,Min Wang,Jiajing Yang,Rujian Liang
The as-deposit (AD) and heat-treated (HT) Al-Cu alloy obtained via wire arc additive manufacturing (WAAM) technology was coated by plasma electrolytic oxidation (PEO), respectively. The reticular big Al 2 Cu grains in the AD Al alloy substrate evolved into numerous small particles and nano precipitates after the heat treatment. The thickness and surface roughness of the PEO coatings on both substrates were increased gradually with the increase of oxidation time. The coating on the HT Al alloy was deposited faster with a rougher surface structure. Although most Al 2 Cu grains were dissolved in the electrolyte at the earlier oxidation stage, some Cu-containing compounds and metallic Cu were gradually deposited in the coatings at the discharge spark oxidation period. The coatings were mainly composed of γ-Al 2 O 3 and α-Al 2 O 3 , and the ratio of α-Al 2 O 3 was increased obviously with the oxidation time. Besides, the coating on the HT sample consisted of a higher ratio of α-Al 2 O 3 than that on the AD alloy, especially at the end of PEO processing. The PEO coatings were made up of two sub-layers, a thin compact inner layer and a porous outer layer. In comparison, the coating on the HT alloy was a bit denser and more uniform. The substrates displayed a adhesion wear trait while the coated samples shew a slight abrasive wear manner over the abrasion test, with a still ball as the friction pair . and the coated HT alloy had a better wear resistance than the coated AD alloy did.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2015
·Vol. 17
·期 40
·26690-26702
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IF 4.493
Shengjie Xia,Mengmeng Shao,Xiaobo Zhou,Guoxiang Pan,Zheming Ni
A series of novel organic–inorganic nanoscale layered materials were synthesized by intercalating the Ti-containing Schiff base complex into the interlayer of the ZnM layered double hydroxides (LDHs, M = Al, Cr, Fe, Ce). The hybrid material was further calcined to make metal oxide composites with highly dispersed Ti elements (Ti/ZnO–MxOy). The structural characterization and photocatalytic results showed that, after intercalation and calcination, the metal oxide composites with a unique flower-like crystal morphology not only had high specific surface area, uniform pore size distribution and narrow band gap, but also showed extremely high photocatalytic performance for hexachlorobenzene (HCB) degradation. The Ti/ZnO–Cr2O3 composite with the narrowest band gap (2.40 eV) and the highest surface area (227 m2) showed the highest photocatalytic performance for HCB (95.5% within 240 min) among the four metal oxide composites. Particularly, it was found that composites derived from layered materials with different supramolecular structure of the host and guest showed different photocatalytic properties. In addition, based on the results from ESR, GC-MS and HPLC-MS, the type and amount of hydroxyl radicals, the decomposition intermediates and the pathway of HCB degradation photocatalyzed by Ti/ZnO–MxOy composites are also discussed in detail.
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MICROPOROUS AND MESOPOROUS MATERIALS
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2017
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IF 3.615
Xingzhong Guo,Pengan Yin,Hui Yang
Hierarchically porous composites constructed by ZnAl-Cl type layered double hydroxides (LDH) nanosheets and amorphous Al(OH) 3 nanosheets were synthesized via a facile sol-gel route for the adsorption of two typical anionic dyes Methyl Orange (MO) and Congo Red (CR) from aqueous solutions. The micro-macrostructure and adsorption properties of hierarchically porous ZnAl-LDH/Al(OH) 3 composites before and after calcination were investigated in detail. The adsorption mechanism and adsorption–desorption cycles were also discussed. Materials characterization confirm that the resultant hierarchically porous composites possess three-dimensional macrostructure with interconnected macropores and co-continuous skeletons constructed by ZnAl-LDH and Al(OH) 3 nanosheets . Calcination at 500 °C allows the transformation from LDH composite to layered double metal oxides (LDO), while the macrostructure is basically maintained with a macropore size of 0.5 μm, a porosity of 53.1% and a BET surface area as high as 122 m 2 g −1 . Adsorption performances show that hierarchically porous composites exhibit ultrafast adsorption rates and high adsorption capacities in the removal of anionic dyes CR and MO. The maximum adsorption capacities of hierarchically porous LDH-based composites and LDO composites via calcination at 500 °C are 2348.3 and 1574.4 mg g −1 for CR and 1013.5 and 1015.1 mg g −1 for MO, respectively. XRD and FTIR results after the dyes adsorption indicate that the intercalation of MO − and CR − anions into the LDH structure via ion exchange with the pristine chloride ions group and the attachment on the external Al(OH) 3 surface determine the adsorption behavior , thus leading to an expansion of the interlayer space . And the calcined products LDO-based composites can be reversibly transformed back into the LDH structure via reconstruction procedure in the presence of dyes aqueous solution. Furthermore, the adsorption–desorption cycles confirm that the as-prepared hierarchically porous composites own excellent recyclable properties and the removal efficiency for CR and MO are 80.2% and 73.7% even after five cycles, respectively.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Shanghua Feng,Binbin Zhao,Yu Liang,Lei Liu,Jinxiang Dong
Tungsten and aluminum were directly incorporated into SBA-15 via one-step synthesis method under an acidic medium. The W- and Al-incorporated SBA-15 was applied as support for Pt nanoparticles to catalyze glycerol hydrogenolysis toward 1,3-propanediol. A combination of the characterization techniques showed that the tungsten and aluminum were incorporated into SBA-15 homogeneously, and the platinum nanoparticles could be uniformly dispersed on the modified-SBA-15. The catalytic performance of Pt-loaded SBA-15 could be significantly improved after the incorporation of tungsten and aluminum into SBA-15, reaching a 1,3-PDO selectivity near 50% when the glycerol conversion was 66%. The glycerol hydrogenolysis reaction proceeds through a dehydration–hydrogenation process, and the enhanced 1,3-PDO selectivity greatly benefited from the synergism between Brønsted acid and Lewis acid sites, which is tightly related with the incorporation of tungsten and aluminum species on the modified SBA-15.
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Journal of Physical Chemistry C
·
2023
·
IF 3.7
Li Yang,Tianwen Xu,Zhongchen Bai,Shuijie Qin
The ZnO/CsPbBr3 heterojunction interface often has poor chemical stability, resulting in the low photovoltaic efficiency of the solar cell. Here, we reported a method to fabricate an electron transport layer (ETL) using an Al element-doped ZnO (AZO) sol to improve the interfacial defects of the ZnO/CsPbBr3 heterojunction. The results showed that the interfacial defects first decreased and then increased with the change of the Al element ratio from 0 to 10%. The device had the least interfacial defects by 7% (atomic ratio) Al doping into ZnO. A 1.27 V open-circuit voltage (VOC) and 6.25% photoelectric conversion efficiency (PCE) were achieved by 7% Al element doping into ZnO in a ZnO/CsPbBr3/carbon structure solar cell. Moreover, the interfacial defect distribution and carrier recombination mechanism of the device were, respectively, illustrated by a varying light intensity test and electrochemical impedance spectroscopy. This work showed that an Al-doped ZnO film prepared by a sol–gel method could significantly improve the performance of solar cells.
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JOURNAL OF MATERIALS IN CIVIL ENGINEERING
·
2023
·Vol. 35
·期 4
·04023031
·
IF 3.2
Biqin Dong,Peiyu Chen,Bingxin Xiao,Lei Zeng,Meng Zhao,Shuxian Hong
The growth mechanism of layered double hydroxide (LDH) films grown in situ on steel via hydrothermal treatment is still unclear. In this study, the mechanism of Co-Al-CO3-LDH film grown in situ on a steel substrate was investigated in detail. During the hydrothermal reaction, the in situ growth process of Co-Al LDH on steel involved three steps: (1) hydrolysis of Al3+ and etching of the steel surface, (2) hydrolysis of urea and promotion of LDH nuclei, and (3) crystallization of LDH. More importantly, the generation of Al(OH)3 determined the integrity of the LDH film grown on the steel surface, and a suitable heating rate was also the key factor that affected the growth of the ordered and regular LDH nanoflakes. Therefore, this work provides a comprehensive understanding of the in situ LDH growth mechanism on steel and may facilitate optimal LDH film preparation.
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Journal of the Taiwan Institute of Chemical Engineers
·
2021
·
IF 5.876
Lihua Qi,Hailin Jiang,Tianni Lin,Xinyu Chang,Bolong Jiang
Background The aim of this study was to develop a class of novel MIL-53(Al) based composite with high phenolic compound adsorption capacity to treat highly toxic phenolic wastewater. Method MIL-53(Al)@AC-x composites with different AC loading ( x ) were constructed by combining MIL-53(Al) with cheap biomass AC derived from cheap rice husk. The adsorbents were characterized by various methods. Significant findings The results showed that the surface area and pore volume of all MIL-53(Al)@AC-x composites increased remarkably, which are much higher than those of pristine AC and MIL-53(Al). The p-nitrophenol adsorption rate of MIL-53(Al)@AC-10 was higher than pristine MIL-53(Al) by 36%. The adsorption performance decreased in the order of MIL-53(Al)@AC-10 > MIL-53(Al)@AC-15 > MIL-53(Al)@AC-5 > MIL-53(Al). The maximum adsorption capacity for p-nitrophenol of MIL-53(Al)@AC-10 reached 250 mg.g −1 , which are higher than the data reported in most literature. The fabrication of AC into MIL-53(Al) is a promising method to obtain a composite with high adsorption capacity and stability. The adsorption kinetics and isotherms fitted well with pseudo-second-order model and Langmiur model. The adsorption is mainly through the π-π and hydrogen bond interactions, and hydrophobic effect.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Zhenlang Mai,Zhihui Zhang,Kaiwei Zhong,Tingting Wu,Changhong Wang
While nanofluids act as highly efficient heat transfer media, insufficient stability restricts their practical use in specific thermal management scenarios. In this study, hexadecyl trimethoxy silane (HDTMS) was used as a surface modifier. It was chemically grafted onto nano-Al₂O₃ particles, producing HDTMS-functionalized Al₂O₃ particles and the corresponding oil-based immersion composite nanofluids. The influence of HDTMS on the suspension stability of oil-based nanofluids was systematically evaluated, along with a comprehensive analysis of their thermophysical properties. Furthermore, the binding mechanisms between nanoparticles and mineral oil, both pre- and post-modification, were elucidated at the microscopic level via molecular dynamics simulations. Results indicated that HDTMS modification successfully introduced long carbon chains onto the nanoparticle surfaces, imparting enhanced lipophilicity. The 0.4 wt% modified nanofluids (HT-O) maintained a transmittance of 59.89% after 30 days of static settling. At the microscopic scale, the interaction energy between HDTMS-Al₂O₃ and mineral oil EC-160 increased by 51.92% at 343 K, and the secondary peak in the radial distribution function markedly decreased to 26.27 with stabilized fluctuations, indicating that the grafted layer effectively suppressed particle aggregation and promoted dispersion uniformity through steric hindrance. This study first applied modified alumina nanofluids to the immersion thermal management of batteries, providing key technical insights for developing immersion cooling media that integrate high thermal conductivity, long-term stability, and electrical insulation for battery thermal management. Meanwhile, molecular dynamics simulation was employed to reveal the intrinsic molecular-level mechanism behind the enhanced stability of the nanofluids.
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Journal of Energy Storage
·
2026
·
IF 9.8
Changsheng Wu,Jiasong Huang,Zhiyong Wang,Xianbo Jin
This study proposes a low-temperature molten salt electrolysis strategy to prepare dendritic nanostructured silicon (nSi) from Al-Si alloys for high-performance lithium-ion battery anodes. The method uses the 403 K AlCl 3 -NaCl-KCl molten salt as electrolyte, in which aluminum is selectively removed from Al-Si (AlSi 12 , AlSi 20 , AlSi 30 ) alloys through anodic dissolution while metallic aluminum is recovered at the cathode. The resulting nSi exhibits tunable porosity dependent on the Al content in Al-Si, and the AlSi 12 -derived nSi 12 shows the highest specific surface area (48.7 m 2 g −1 ) and pore volume (0.21 cm 3 g −1 ) with interconnected 30–50 nm dendritic structures. When evaluated as anodes, nSi 12 demonstrates superior electrochemical performance with initial Coulombic efficiency of 91.1% at 1 A g −1 , retaining 2441 mAh g −1 after 100 cycles (or 80.0% capacity retention). The enhanced performance stems from its porous architecture buffering volume expansion, as evidenced by the electrode expansion after 100 cycles of 26% for nSi 12 versus 60.4% for nSi 30 . Comparative analysis reveals lower charge transfer resistance and higher Li + diffusion coefficient in nSi 12 . This method achieves an Al recovery rate of 95%, offering an energy-efficient, closed-loop approach for nanostructured silicon production with dual advantages in sustainable manufacturing and high-performance energy storage.
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JOURNAL OF THE INDIAN CHEMICAL SOCIETY
·
2026
·
IF 3.4
Zhang Lei,Zhang Liu,Chen Ya,Zhang Lei,Tan Chenxi,Song Ruikang,Gao Shizhe
This study employed 3,5-pyrazoledicarboxylic acid (PZDC) as a ligand to synthesize aluminum-based metal-organic frameworks (Al-PZDC) via an in-situ hydrothermal method. Al-PZDC composites were constructed using two loading methods—preloading and postloading—with 13X molecular sieves, activated carbon, and γ-Al 2 O 3 as carriers, respectively. The physicochemical properties of the materials were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET), BET specific surface area analysis , scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The NH 3 adsorption mechanism was investigated by combining adsorption kinetic models, pre- and post-adsorption spectral analysis, and in situ differential Raman infrared spectroscopy (Insitu DRIFTS). The results indicate that Al-PZDC was successfully loaded onto each carrier; Composites prepared by the pre-loading method exhibited superior adsorption performance compared to those from the post-loading method. The composite (13X molecular sieve @Al-PZDC-0.4) prepared using 13X molecular sieve as the carrier and the pre-loading method demonstrated the most outstanding NH 3 adsorption performance, achieving a saturation adsorption capacity of 100.57 mg·g -1 at 25°C and 1% NH 3 concentration. Kinetics analysis indicates that NH 3 adsorption is primarily chemical adsorption supplemented by physical adsorption. The adsorption mechanism involves physical adsorption, pore filling, hydrogen bonding interactions, and the synergistic effects of Lewis acid (L-acid) and Brønsted acid (B-acid) sites.
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