SURFACE & COATINGS TECHNOLOGY
·
2021
·
IF 4.158
Ming-Jie Zhou,Teng Xu,Ji-Ming Hu
Layered double hydroxide (LDH) films have been used to protect metal substrates because of their superior barrier performance and capability of capturing corrosive anions (such as Cl − ) by exchange with interlayer anions. In this preliminary work, we determined that some photoactive LDHs (such as NiAl-LDH) can also provide cathodic protection to metals under light illumination, stemming from the light-generated electrons of semiconducting LDHs, if the energy level of the conduction band of LDHs is higher than the Fermi level of the metal. The current experimental results prove that the corrosion resistance of stainless steel is enhanced by the attached NiAl-LDH films in the dark and is further increased under light illumination due to photogenerated cathodic protection.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Handong Jiao,Shuqiang Jiao,Shijie Li,Wei-Li Song,Haosen Chen,Jiguo Tu,Mingyong Wang,Donghua Tian,Daining Fang
Although rechargeable Al batteries attract interests due to their features of abundant Al source and high safety, the Al negative electrodes suffer from critical problems, including dendrite, corrosion, pulverization, non-recyclable Al wastes, etc. For addressing these challenges, here a novel liquid gallium is demonstrated for negative electrodes of Al batteries. The results show that the liquid gallium negative electrode enables the reversible alloying/dealloying between Al and Ga. Remarkably, the essential problems in the solid Al negative electrodes, including dendrite, corrosion and pulverization, would be well avoided attributed to the liquid state of the Ga electrode during cycling. In addition to the enhanced stable cycling performance, Ga negative electrode is also recyclable, allowing the cycled Ga for further presenting stable cycling in the re-assembled batteries, and which is helpful for its practical application. The results in the present work open a precedent way to develop the advanced negative electrode with dendrite-free, corrosion resistant and recyclable features and advantages for various types of rechargeable batteries.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Fucheng Wang,Jiajun Li,Chunsheng Shi,Enzuo Liu,Chunnian He,Naiqin Zhao
Ceramic phase reinforced aluminum matrix composites (CAMCs) are widely used in high-tech fields represented by aerospace industry due to their advantages of high specific strength, high specific modulus, high thermal stability, and light weight. Strong interface bonding is a prerequisite for high performance of multiphase materials. Herein, a novel CAMC in situ reinforced by MgAl2O4 particles and MgAlB4 nanorods was prepared by vacuum hot-pressing combined with hot-extrusion process. A high-resolution transmission electron microscope was used to characterize the orientation relationship and interface structure between the ceramic phases and the aluminum matrix. Two orientation relationships (OR1 and OR2) of MgAl2O4/Al and one (OR3) of MgAlB4/Al are determined: OR1-[011]p//[011]Al, (11̅1)p//(11̅1)Al; OR2-[211]p//[011]Al, (113̅)p//(022̅)Al; OR3-[101̅0]R//[001]Al, (0002)R//(2̅20)Al. The MgAl2O4 in OR1 forms a coherent interface with the aluminum matrix at (111) surface, while they form a 4 × 5 near coincidence site lattice (CSL) interface structure for OR2. In OR3, the MgAlB4 forms an approximate coherent interface with Al matrix at its (0002) surface and a 2 × 5 CSL interface structure at its (011̅0) surface. First-principles calculations suggest that MgAl2O4 combines to aluminum at (111) plane through covalent bonds, which means high interfacial bonding strength. The hot-extrusion process makes the ceramic phase evenly distributed in the matrix. The mechanical properties of the composites are greatly improved compared with pure aluminum.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2019
·
IF 3.42
Xuelin Huang,Liang Yu,Yinsheng Dong
In this paper, a multiple hybrid coating (MHC) with good corrosion resistance and superhydrophobic property on the surface of cast Al–Si alloy was synthesized via a simple dip-coating method by using organosiloxane containing hydrophobic mullite-SiO 2 (M–S) particles as a precursor. The morphology, composition and water contact angle (WCA) of the coatings were investigated by SEM, FT-IR, XRD and OSA100, respectively. The results showed that the hydrophobic M–S particles was synthesized through modified Stöber method, which has a micro- and nano- scale structures. In addition, the morphology of the MHC presented that a dense and uniformly cover on the Al–Si alloy substrate formed a superhydrophobic surface with the WCA ∼153.4°. The corrosion protection of MHC was evaluated by using the Tafel polarization curves and electrochemical impedance spectroscopy. The coating with M–S particles exhibited much better corrosion resistance property than that of the untreated substrate and pure organosiloxane coating (OSC). The E corr was obviously more positive than that of them. Moreover, the corrosion current density of MHC was remarkably decreased by 5 and 3 orders of magnitude compared with other two coatings, respectively. The corrosion resistance of the MHC decreased gradually with increasing immersing time. However, the R ct value of MHC was still 2.31 × 10 6 Ω cm 2 after 168 h immersion testing in 0.6 M NaCl solution, which was nearly 322-fold higher than that of untreated substrate. Owing to the excellent superhydrophobic, corrosion resistance and long-term stability, the MHC possesses potential application in corrosion resistance of cast Al–Si alloy.
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2019
·Vol. 150
·期 6
·1591-1604
·
IF 2.372
Du Boyu,Chen Changzhou,Sun Yang,Liu Bingyang,Yang Yingying,Gao Si,Zhang Zhenshu,Wang Xing,Zhou Jinghui
Abstract Catalytic depolymerization of lignin to produce bio-oil, liquid fuels, and aromatic chemicals in high yields is important for a biorefinery to remain competitive. In this study, undoped and Ni-doped catalysts for depolymerization of rice husk lignin (RHL) were developed and analyzed. The results showed that the catalysts had hydrotalcite-like structures with lamellar morphology. With suitable Ni-doping amount, the catalysts had high activity, thus better promoted the depolymerization of RHL. Among all catalysts, the Ni1/4MgAl catalyst could best promote the cleavage of the β-O-4 aryl ether bond in RHL molecule and thus could substantially increase the yields of bio-oil. The depolymerization catalyzed by this catalyst was also found to be temperature-, time-, and solvent-dependent. This study provides information that can be beneficial to the biorefinery industries and may help promote the valorization of lignin. Graphic Abstract
✓ 已验证
产品关联
DOI
高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2019
·Vol. 44
·期 12
·1600-1607
·
IF 1.634
Daixiong Zhang,Rui Pei,Xiofei Peng,Qing Xiang,Xia Wang
In this study, nano-Al/Fe 2 O 3 bilayer was successfully formed via aqueous electrophoretic deposition (EPD) route for the first time. For this formation, the first layer of nano-Fe 2 O 3 was prepared by EPD using the bi-additive of 0.015 mM HCl+10 mg L −1 PEI, and then the second layer of nano-Al was immediately prepared by EPD using 5 mg L −1 PEI as additive. The electrophoretic nano-Al/Fe 2 O 3 bilayer had high heat release of ∼2800 J g −1 and exhibited good combustion performance. In comparison with the previous work realized by using organic-solvent-EPD, we believe this study can pave a new way for preparing the bilayers of nanothermites or metallic reactive materials by more cost-effective and environment-friendly aqueous EPD route.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Xu Guan,Zheng Zhou,Ping Luo,Fengshun Wu,Shijie Dong
Al-rich alloys prepared by milling and melting were characterized by a range of instrumental analysis techniques and employed for hydrolytic hydrogen production. The hydrolysis reaction of each Al-rich alloy with water was measured. The hydrolysis properties of Al-rich alloys prepared by milling method were superior to those prepared by melting method with same composition. In particular, the Al-5wt%Ga-3wt%In-5wt%Sn alloy prepared by milling featured better hydrolysis properties than that obtained by melting, achieving a hydrogen yield of 1146.0 mL g −1 and a maximum hydrogen generation rate of 840.0 mL min −1 g −1 in tap water within 10 min at 25 °C and atmospheric pressure. Moreover, the phase compositions, chemical states, elemental distributions, and thermal behaviors of melting and milling samples were investigated, and the activation mechanism was discussed as well.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 36
·17713-17723
·
IF 9.931
Xiang Ke,Shuangfeng Guo,Gensheng Zhang,Xiang Zhou,Lei Xiao,Gazi Hao,Ning Wang,Wei Jiang
In this study, to improve the safety in the preparation process of energetic materials, vacuum freeze-drying technology is applied to develop nanoenergetic thin films in which Al nanoparticles (Al NPs) are used as the fuel and polyvinylidene fluoride (PVDF) powders act as the oxidant. The whole process effectively avoids high temperature and thus ensures operational safety. The morphology and composition characterizations confirm that Al NPs are dispersed uniformly in the hydrophobic energetic binder, endowing the films with increased water-proof, anti-aging and anti-corrosion characteristics. The results of thermal analysis show that a pre-ignition reaction (PIR) destroys the Al2O3 shell and a sharp exothermic peak from the reaction between the exposed Al core and PVDF is found before the melting point of Al. Combustion tests reveal that the film with the highest content of Al NPs possesses the fastest flame propagation speed. The preliminary reaction mechanism obtained by probing the reaction products and intermediates suggests that a two-step reaction exists when the film is slowly heated in N2, while a competitive reaction between oxidation and fluorination of Al NPs is observed when the film burns in air. These results indicate the promising potential of vacuum freeze-drying technology in manufacturing nanoenergetic materials.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
Renping Cao,Wenjie Luo,Qingqiang Xiong,Aihui Liang,Shenhua Jiang,Yongchun Xu
LiRGe 2 O 6 :xMn 4+ (R = Al or Ga) (0 ≤ x ≤ 1.0 mol%) phosphors are synthesized by solid-state reaction method in air, and their crystal structures, luminescence properties, and fluorescence lifetimes are investigated. Their photoluminescence (PL) bands peaking at ∼ 670 nm owing to the 2 E → 4 A 2 transition of Mn 4+ ion cover the region from 620 to 750 nm (λex = 289 nm), and photoluminescence excitation (PLE) bands (λem ≈ 670 nm) are observed in the range of 200–550 nm. With excitation 289 nm, PL intensity of LiAlGe 2 O 6 :0.6%Mn 4+ phosphor is far stronger than that of LiGaGe 2 O 6 :0.6%Mn 4+ phosphor owing to the influence of crystal field. The optimal Mn 4+ ions concentration is ∼0.6 mol%. The fluorescence lifetime and quantum efficiency of LiAlGe 2 O 6 :0.6%Mn 4+ and LiGaGe 2 O 6 :0.6%Mn 4+ phosphors are ∼1.55 ms, 68.5 μs, 32%, and 15%, respectively. Luminous mechanism, the temperature quenching mechanism, and the influence of crystal field to luminous properties are analyzed and discussed, respectively. The experiment results are helpful to develop other novel Mn 4+ -doped phosphors.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2014
·
IF 2.703
Weiya Huang,Jie Chen,Fei He,Jinpeng Tang,Dan Li,Yi Zhu,Yuanming Zhang
Zirconium-pillared montmorillonite (Zr-Mt) and zirconium/aluminum-pillared montmorillonite (Zr/Al-Mt) were prepared by intercalating Zr 4 + and Zr 4 + /Al 3 + polyhydroxy-cations into the interlayer spaces of natural montmorillonite (Mt). Zr-Mt and Zr/Al-Mt exhibited greater specific surface areas and pore volumes, as compared with Mt. In particular, the enhancement in the phosphate removal performance of Zr/Al-Mt was more significant in terms of phosphate adsorption capacity and rate, in relation to Zr-Mt. Herein, several important parameters, such as contact time, temperature, initial solution pH and competing anion, were investigated in detail to evaluate the phosphate adsorption performances of Zr/Al-Mt. The pseudo-second-order kinetic model fitted our acquired phosphate adsorption data best, in comparison with the use of the pseudo-first-order or the pseudo-third-order kinetic model. The Langmuir model appeared to fit the adsorption process better than that of the Freundlich model, with a maximum phosphate adsorption capacity of 17.2 mg P/g at 25 °C. The thermodynamic parameters (ΔG°, ΔH° and ΔS°) were also determined, which revealed that the phosphate adsorption process was spontaneous and endothermic in nature. A high adsorption capacity was observed at pH = 3.0, which decreased by increasing pH. The presence of competitive ions, e.g. Cl − , NO 3 − , and SO 4 2 − , slightly impacted the phosphate adsorption; whereas the introduction of CO 3 2 − caused the greatest adverse effect. The study on the Zr/Al-Mt leaching strongly suggested that the risk of Zr 4 + leakage during adsorption process be negligible within a wide pH range of 3.0–9.0. After three adsorption-desorption cycles, there was no significant loss in the adsorption performance of Zr/Al-Mt.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Zhiqiang Dai,Jie Liu,Qizhi Hou,Chengwu Yang,Xueqing Zhang,Manunya Okhawilai,Prasit Pattananuwat,Xinyu Zhang,Jiaqian Qin
The construction of artificial solid electrolyte interfaces on zinc anodes is recognized as an effective strategy to mitigate zinc dendrite formation and side reactions; however, existing methods are often complex and time-consuming. In this study, we successfully fabricated a highly stable Sn–Al sol protective layer on the surface of the zinc anode using a simple spray-coating technique. This protective layer significantly enhances the electrochemical performance of zinc symmetric cells, achieving stable cycling for over 2500 h at 1 mA cm–2. In Zn//Cu half-cells, the Sn–Al sol coating improves charge–discharge efficiency and cycling stability, with over 500 and 950 cycles at 1 and 5 mA cm–2, respectively. The average charge–discharge efficiency during stable cycling reaches 95.7%, in contrast to 85.0% for bare Zn, indicating improved utilization of Zn2+. Additionally, the Sn–Al sol coating offers enhanced corrosion resistance and effectively promotes uniform Zn2+ growth along the (101) crystal plane, reducing dendrite formation. Overall, this simple spray-coating approach presents significant potential for high-stability modifications of zinc anodes, offering a novel strategy for the industrial application of zinc-ion batteries.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2025
·
IF 12.1
Ting Liu,Cui Nie,Yao-feng Mao,Yu Zhang,Gang Li,Fu-de Nie,Jun Wang,Jie Chen
The combustion efficiency and reactivity of aluminum (Al) particles, as a crucial component in solid propellants, are constrained by the inert oxide layer aluminum oxide (Al 2 O 3 ). Polytetrafluoroethylene (PTFE) can remove the oxide layer, however, carbon deposition generated during the reaction process still limits the reaction efficiency of Al/PTFE fuel. Here, a litchi-like Al/PTFE fuel with the nano-PTFE islands distributed on the Al particles surface is successfully designed, based on localized activation and synergistic reaction strategies, to solve the Al 2 O 3 layer and carbon deposition. This unique PTFE-coated structure can achieve localized activation of Al by surface etching, creating reaction channels, and exposing the active Al. Such a channel network promotes the circulation of fluorine and oxygen, stimulating the synergistic reactions of Al-F and Al-O and energy output. Regulating the PTFE content can maximize the elimination of carbon deposition and achieve the full combustion reaction of Al/PTFE. The maximum flame area and pressure output of the litchi-like Al/PTFE fuel increased by 241.9%, 734.7%, 118.4%, and 265.2%, respectively, compared with traditional physical mixture and core-shell structure Al/PTFE fuels. The localized activation and synergistic effects of litchi-like structure effectively transform carbon waste into a valuable resource, introducing a novel approach for the propellants.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）