Journal of Energetic Materials
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2026
·
IF 1.8
Mingzhu Guo,Zhongyuan Zhang,Zhijiang Jin,Chunlong Huangfu,Xinyu Yang,Hongyan Qu,Zhiyi Li,Feng Luo,Qian Gao
Aluminum powder, a common metallic fuel for propellants and explosives, is limited by high ignition temperatures, incomplete combustion and particle agglomeration. To mitigate these drawbacks, we synthesize core–shell Al–In–Sn ternary alloy fuel by facile melt casting. Eutectic phase separation drives spontaneous formation of an InSn₄ protective shell on Al particle surfaces. The InSn₄ shell functions as a passivation barrier at low temperatures to inhibit premature oxidation and guarantee storage stability. Upon heating above 250 °C, thermal expansion mismatch ruptures the molten shell, exposing active Al and triggering strong exothermic oxidation. The optimized 80Al–In–Sn sample exhibits an oxidation heat release of 1220 J/g (11.5-fold higher than pristine Al), a mass gain efficiency of 76.3%, and reduced activation energy (242.9 kJ/mol by Kissinger method versus 403 kJ/mol for pure Al), verifying greatly enhanced reactivity. Combined DSC and XRD results reveal the temperature-controlled oxidation mechanism. This work offers guidelines for designing storable, highly reactive alloy fuels and facilitates their engineering applications within energetic materials.
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AICHE JOURNAL
·
2026
·
IF 4.4
Quanqi Zhang,Zhonghua Jiang,Bo Yang,Binbin He,Ye Yang,Yucai Qin,Jian Zheng,Yi Mei,Yun Zu
Alloying Ni with another metal on γ-Al 2 O 3 support holds considerable promise to enhance carbon-resistance in dry reforming of methane (DRM), yet its effectiveness is constrained by poorly controlled alloy structure and surface Al-OH groups. Herein, bimetallic NiCo/γ-Al 2 O 3 catalysts were designated using electropositive NiCo complexes via a strong electrostatic adsorption strategy. The NiCo alloy and oxygen vacancy were primarily derived from the evolution of surface Al- μ 2 -OH and Al- μ 3 -OH groups anchored NiCo layered structures. The optimized Ni 3.0 Co 3.0 Al catalyst achieved near-thermodynamic-equilibrium CH 4 and CO 2 conversions, along with ultra-low coke deposition rate (0.03 mg coke ·g cat −1 ·h −1 ) after 200 h on-stream at 600°C. Microkinetic and in situ FTIR studies elucidated the reaction mechanism, wherein CH x * species from CH 4 decomposition on atomically uniform NiCo alloys were rapidly eliminated by surface Al–OH and reactive O* generated from CO 2 dissociation on limited oxygen vacancies, forming labile HCOO* and CH x O* intermediates, while effectively suppressing the Boudouard reaction, thereby ensuring exceptional catalyst longevity.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Yong Zhang,Siqi Huang,Bingyu Mei,Lingyi Jia,Jun Liao,Wenkun Zhu
A novel dopamine-supported Mg( Ca )Al layered double hydroxide composite was synthesized by co-precipitation method. The existence of Ca 2+ and dopamine could promote the capture of uranium on the layered double hydroxides. In batch experiments, the composite exhibited good uranium removal performance, including high adsorption capacity (687.3 mg/g), strong anti-interference and good reusability (the removal percentage was still higher than 90 % after five cycles). At low initial uranium concentration, the uranium removal percentage on the composite exceeded 99.7 % and the residual concentration of uranium in the solution was <0.03 mg/L, reaching the limited standard of the World Health Organization. The studies of adsorption kinetics and isotherm indicated that the uranium adsorption behavior on the composite conformed to the pseudo-second-order kinetic and Langmuir isotherm models, suggesting that the process was a monolayer adsorption dominated by chemical adsorption. Furthermore, the high-efficiency uranium adsorption on the Mg( Ca )Al layered double hydroxide was mainly attributed to the strong complexation between the active sites (-OH and -NH 2 ) and uranium, the precipitation of interlayer intercalation ions (CO 3 2− and OH − ) to uranium and the ion exchange of Ca 2+ to uranium. Due to these advantages, the dopamine-supported Mg( Ca )Al layered double hydroxide composite is expected to be used as fine adsorbent to remove uranium from wastewater.
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高影响因子
MATERIALS CHARACTERIZATION
·
2023
·
IF 4.7
Chengyi Xu,Xiaoping Cai,Xinyang Jiao,Khanh Ly Vu,Zhichao Shang,Peizhong Feng
Porous CoAl 3 intermetallics have great catalytic potential. However, its high porosity and controllable preparation are still incipient. In this paper, the effect of isothermal treatment on the near-net formation process of porous CoAl 3 material is studied, and the phase transformation process and diffusion kinetics of the Co/Al diffusion couple in the solid-phase diffusion stage are described. The results show that isothermal treatments in the range of 510–550 °C reduce the exothermic intensity of the thermal explosion (TE) reaction. The holding time of 30 min at 530 °C facilitates the near-net formation of porous CoAl 3 . The isothermal treatment does not affect the phase composition of the final product. Still, it causes changes in the phase and depth of the diffusion, affecting the exothermic strength and skeleton morphology. Based on the phase transition and thermodynamic analysis , the CoAl phase formation is the key to reducing the exothermic intensity. The diffusion kinetics indicates that the low diffusion activation energy of the CoAl phase (Q 1 = 1.66 kJ mol −1 ) is the main reason for the preferential formation. And the exponential kinetic factor of the second diffusion layer (n 2 = 0.75) explains its high diffusion depth.
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Nanomaterials
·
2023
·Vol. 13
·期 12
·1837
·
IF 5.3
Miaomiao Jin,Zhanxin Song,Wei Liu,Guozhen Wang,Mo Xian
Biological approaches for the synthesis of a hybrid explosive–nanothermite energetic composite have attracted greater scientific attention because of their advantages, including their moderate reactions and the absence of secondary pollution. In this study, a simple technique was developed to fabricate a hybrid explosive–nanothermite energetic composite based on a peptide and a mussel-inspired surface modification. Polydopamine (PDA) was easily imprinted onto the HMX, where it maintained its reactivity and was capable of reacting with a specific peptide used to introduce Al and CuO NPs to the surface of the HMX via specific recognition. The hybrid explosive–nanothermite energetic composites were characterized using differential scanning calorimetry (TG-DSC), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy(XPS), and a fluorescence microscope. A thermal analysis was utilized to investigate the energy-release properties of the materials. The[email protected]@CuO, which benefitted from an enhanced interfacial contact in comparison with the physically mixed sample (HMX-Al-CuO), demonstrated a 41% lower HMX activation energy.Keywords:biological self-assembly;polydopamine;peptide;green preparation;activation energy
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高影响因子
IONICS
·
2023
·Vol. 29
·期 7
·2853-2864
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IF 2.8
Wang Wenping,Zhao Zhiyi,Deng Jiayao,Lang Wei,Zhen Lipeng,Lu Huimin
The oxygen reduction reaction of the cathode in an Al-air battery plays a key role in the performance of the entire battery. Generally, Pt and its alloys are recognized as catalysts with high oxygen reduction catalytic performance, but their application is limited by the rare earth content and high cost. In this paper, α-MnO 2 nanotubes are prepared using a hydrothermal method and used as a template. Nano-Ni–Mn bimetallic oxides with different compositions are prepared with different NiO and α-MnO 2 ratios by calcination. The effects of morphology, phase, and Mn 3+ /Mn 4+ and Ni 3+ /Ni 2+ ratios on electrochemical performance and battery discharge performance are analyzed. The results show that the contents of α-MnO 2 and Ni 6 MnO 8 in NM-12 catalyst are low, and the molar ratio of Mn 3+ /Mn 4+ and Ni 3+ /Ni 2+ is high. Also, the specific surface area of NM-12 is relatively high. Finally, the catalyst prepared with a NiO to α-MnO 2 ratio of 1:2 shows better electrochemical catalytic performance and battery discharge performance that is comparable to that obtained for a commercial 20 wt% Pt/C catalyst.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Shuya Liu,Xinjie Ma,Yuxin Liu,Weiwei Chen,Yuejie Ai,Kexin Li,Xiushen Ye,Ming Fang,Xiaoli Tan
To fully utilize the customizable characteristics of metal-organic framework (MOF) materials in environmental applications, it is important to precisely modulate the branching groups of MOFs for improved performance. In this work, MIL-53(Al) was modulated by different numbers of nitrogen atoms and carboxyl groups/phosphite groups (MOF-N 2 -(COOH) 3 , MOF-N 3 -(COOH) 4 , and MOF-N 2 -(PO(OH) 2 ) 3 ) via a post-synthesis modification method, and the influence of functional groups and chain length on adsorption and the mechanism of modified groups on the adsorption of uranium (U) are demonstrated. Batch experiments suggest the removal of U(VI) reaches 37%, 27%, and 90% for MOF-N 2 -(COOH) 3 , MOF-N 3 -(COOH) 4 and MOF-N 2 -(PO(OH) 2 ) 3 , respectively (pH = 4.0, T = 25 ℃, I = 0.01 M NaNO 3 ). The surface complexation between UO 2 2+ and the surface of functional groups on the modulated MOF dominates the adsorption. Nevertheless, the steric hindrance in MOF porous structure can explain the inferiority of U(VI) adsorption on MOF-N 3 -(COOH) 4 (27%) to MOF-N 2 -(COOH) 3 (37%). MOF-N 2 -(PO(OH) 2 ) 3 is more conducive to uranyl adsorption than MOF-N 2 -(COOH) 3 or MOF-N 3 -(COOH) 4 , which is due to better affinity of U(VI) to phosphate group than the carboxyl group by density functional theory (DFT) calculation. Moreover, the excellent regeneration performance and U(VI) adsorption of MOF-N 2 -(PO(OH) 2 ) 3 in natural water or wastewater further confirmed the practical application of modulated MOFs in practical application.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Haifeng Yang,Zhiqiang Qiao,Weimiao Wang,Pengfei Tang,Shuaishuai Man,Xiaodong Li,YuTing Xie,Deyun Tang,Xueming Li,Guangcheng Yang
Private information protection of electronic chips which store large amounts of sensitive data, is a crucial issue in electromechanical systems nowadays. Here, a self-destructive microchip based on an instantaneous thermite reaction is designed to prevent the leakage of electronic information. The device is consisted of a silicon test wafer and an upper energetic film coated by a simple drop-casting technique. A series of Al/BiOX-based nanothermites have been prepared for decreasing the reaction sensitivity, meanwhile optimizing the destruction efficiency of the energetic film system. Among them, Al/Bi 2 O 3 nanothermite containing 30 wt% BiOBr possesses a low sensitivity (45 J), the maximum pressure peak (1.93 MPa) and pressure effect duration due to multiple interactions of the three nano-scale energetic components. Besides, the energetic film prepared by this nanothermite fomula also exhibits a more effective destruction of the device. The high-speed photography results demonstrate that the violent reaction shatters the thick energetic microchip (∼1 mm) within merely 0.5 ms. Importantly, the efficient destruction of energetic microchips shows excellent reproducibility in different working scenes, including Air or Ar atmosphere. It is believed that this self-destructive device with environmentally friendly components and simple but adaptive design can be extensively used in various electric microcomponents.
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CHEMOSPHERE
·
2022
·
IF 8.943
Zhiyu Wei,Jie Chen,Hongjin Tong,Mingchao Sun,Jing Tian,Lu Fan
CNTs-Al was prepared by ball milling combined with sintering process and then used for CNTs-Al-Cu synthesis with chemical deposition method. The obtained CNTs-Al-Cu composite was systematically characterized and its NO 3 − -N reduction performance under alkaline condition was also evaluated. As indicated by the reduction batch experiment, 80.2% of NO 3 − -N removal efficiency was obtained in 90 min at pH of 9. The product of the reduction process was dominated by NO 2 − -N, which was further reduced to harmless N 2 . The reusability of CNTs-Al-Cu composite was evaluated, and the experiment results showed that 68.1% of NO 3 − -N removal efficiency was maintained after 3 cycles of regeneration. Finally, based on the characterization results and kinetic analysis, it was concluded that micro-electrolysis was mainly responsible for the removal of NO 3 − -N by CNTs-Al-Cu.
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PubMed
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Zhiliang Jin,Xiaohong Li,Teng Li,Youji Li
Graphdiyne (g-CnH2n–2) is a new carbon material composed of sp and sp2 hybrid carbon atoms. Since the synthesis by Li’s team, graphdiyne has been widely studied in other fields because of its excellent properties. In this paper, graphdiyne was synthesized from copper-containing materials and the composite GDY/CuI/MIL-53(Al) S-scheme heterojunction is prepared for photocatalytic cracking of water to produce hydrogen. First, GDY/CuI was prepared by organic synthesis, and then GDY/CuI was anchored on the surface of MIL-53(Al) by in situ ultrasonic stirring. After the continuous optimization of experimental conditions, the final hydrogen evolution rate is much higher than that of MIL-53(Al). This efficient photocatalytic performance can be attributed to the S-scheme heterojunction formed by the unique energy band arrangement. At the same time, the mechanism of charge transfer was demonstrated by in situ irradiation X-ray photoelectron spectroscopy. The strong interaction among the three strongly promotes the separation and transfer of photogenerated electron–hole pairs.
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PubMed
高影响因子
Coatings
·
2023
·Vol. 13
·期 7
·1246
·
IF 3.4
Wenjuan Qi,Desheng Ding,Weijie Luo,Weiliang Jin,Qian Kou,Chuntao Ge,Saijun Xiao
The hardness and wear resistance of amorphous Al–Mn alloy coatings can be improved by incorporating ceramic particles into them to extend their application. In this paper, Al–Mn/WC composite coatings have been prepared with electrodeposition in stirred AlCl3–NaCl–KCl–MnCl2molten salts at 180 °C with the addition of WC particles. The effects of stirring speed (400–700 rpm) and cathode current density (15–75 mA/cm2) on the produced Al–Mn/WC composite coatings have been studied. At 600 rpm and 700 rpm, the Al–Mn/WC composite coatings exhibited the best uniform distribution of the embedded WC particles, with the tested microhardness value up to 650 HV0.1, compared with 530 HV0.1of the Al–Mn alloy. Moreover, under various cathode current densities, the best quality of the Al–Mn/WC composite coating was obtained at 55 mA/cm2, with a homogeneous distribution of WC particles and the highest microhardness value (670 HV0.1). It is expected that this method could be extended to be applied for the preparation of aluminum-based and magnesium-based ceramic composite coatings.Keywords:AlCl3–NaCl–KCl–MnCl2molten salts;electrodeposition;WC particles;Al–Mn/WC composite coating
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yachao Xu,Zhong Zhou,Peng Yu,Ying Wang
Synergistically tuning electronic states at the atomic level to facilitate photocatalytic overall water splitting is a challenge. However, elucidation of the role of specific electronic states of Znln 2 S 4 (ZIS) in regulating both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) is still scarce, making it difficult to accurately predict the actual photocatalytic performance. Here, the substitution of Zn sites with Al atoms was found to modulate the potential difference of the ZIS surface domain heterojunction structure, and electrons were further transferred to CuS to form a built-in field that promotes charge separation. When Al doping is present on the ZIS surface, ZIS exhibits p-type semiconductor properties, which leads to the formation of p-n junctions within Al-CuS/ZIS itself. Due to the large work function and metallic properties of CuS, and Al-CuS/ZIS as a whole tends to form a Schottky heterojunction, and the two heterojunction structures synergistically promote the migration of photogenerated carriers. In addition, the Al doping changes the electronic states around the ZIS, allowing the Al ZIS to promote the adsorption of O* and H* during OWS. The solar-driven photocatalytic overall water splitting efficiency of Al-CuS/ZIS is as high as 153.6 (HER) and 73.1 (OER) μmol/h g −1 , which is about 10 times that of ZIS. This work opens the possibility to design efficient photocatalytic materials through tunable composition and electronic structure.
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