SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Meng Qingling,Hu Xianwei,Kang Hongguang,Lin Ming,Yu Jiangyu,Liu Aimin,Shi Zhongning,Wang Zhaowen
Aluminum coating was expected to be used for corrosion protection of 300M steel. Al coating was prepared using the galvanostatic electrodeposition from AlCl 3 /acetamide (1.3:1) system for the corrosion protection of 300M steel. This process was conducted at varying current density (2–8 mA·cm −2 ) and electrodeposition time (1 and 2 h). The chronopotentiometry revealed that the size of Al nucleus was proportional to the inverse of overpotential. Thus, the morphology of Al coating was characterized by scanning electron microscope and optical surface profiler. The results indicated a decrease in Al grain sizes and the roughness fluctuation with increasing current density. Moreover, the corrosion resistance of Al coatings was evaluated in a 3.5 wt% NaCl solution using the potentiodynamic polarization and electrochemical impedance spectroscopy test. It was illustrated that corrosion current density decreased by 57.8 % at 6 mA·cm −2 with the electrodeposition time increasing from 1 to 2 h, while the value decreased by 75.9 % with the current density raising from 5 to 6 mA·cm −2 for 2 h. Al coating electrodeposited at 6 mA cm −2 for 2 h represented the highest corrosion resistance with the charge transfer resistance of 5695 Ω·cm 2 , while the value of 300M steel was 914 Ω·cm 2 . Finally, X-ray diffraction pattern suggested that corroded coatings compositions included Al 2 O 3 , AlO(OH) and AlCl 3 ·6H 2 O. The study was considered to provide a promising method using AlCl 3 /acetamide to electrodeposit Al coatings for protecting 300M steel from corrosion.
研究领域:
材料科学
·
腐蚀工程
·
电化学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Da Wang,Zhong Wang,Guangci Li,Xuebing Li,Bo Hou
SiO2-modified high thermal conductivity Al2O3@Al composites were synthesized and supported cobalt for Fischer–Tropsch synthesis to improve the catalytic performance and intensify the heat transfer within a fixed-bed reactor. FTS results showed that the CO conversion and C5+ selectivity increased whereas CH4 selectivity decreased, which could be attributed to the reduced metal–support interaction via modification of SiO2 on the surface of Al2O3@Al. The heat transfer coefficients of the Co/SAl2O3@Al–x were more than 30 times those of conventional Co/Al2O3 according to the laser flash measurement. The thermal conductive study showed that a homogeneous radial temperature gradient was maintained within the catalyst bed for Co/SAl2O3@Al-x even without using a heat diluter, indicating good thermal conductivity within the reactor. In addition, the temperature of the catalyst bed for Co/SAl2O3@Al-x was easier to reach a “steady state” compared to the reactor packed with traditional low thermal conductive Co/Al2O3, which could improve the operating flexibility of FTS.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2026
·
IF 4.4
Mengmeng Zhou,Qiuhong Guo,Chun Wang,Yue Su,Mingxue Li,Haichao Zhao
Owing to the uniqueness of their structure, remarkable specific surface area, and exceptional impermeability, two-dimensional layered nanomaterials (including graphene, hBN, MXene, LDH, and nanoclays) broadly act as reinforcing fillers to optimize the effectiveness of organic coatings in corrosion prevention. constituting the primary influence on coating performance is the state of their dispersion within the polymer matrix. Herein, a simple, exfoliation-friendly, and cost-effective method is reported for synthesizing functional LDH-Cdot nanohybrids for metal anticorrosion. A 3 nm carboxyl-rich carbon dot (Cdot) was prepared via pyrolysis and introduced into the LDH galleries, where it adsorbed onto LDH to form LDH-Cdot nanohybrids. Compared with pure LDH, LDH-Cdot exhibits a significantly improved water dispersion. By incorporation of the LDH-Cdot nanocomposite into a waterborne epoxy matrix, a corrosion-resistant coating featuring a controlled thickness of around 53 μm was successfully constructed. EIS results demonstrated that the impedance modulus at 0.01 Hz decreased in the sequence LDH-Cdot epoxy > LDH epoxy > pure epoxy. Notably, the |Z|0.01 Hz value of the LDH-Cdot epoxy coating was still retained at 4.05 × 108 Ω·cm2 following 90 days of immersion. Findings from LEIS and corrosion product analyses indicated that carbon dots anchored onto LDH are capable of coordinating with metal ions, which facilitates passivation layer formation and effectively slows corrosion kinetics.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Guangyuan Chen,Zeru Wang,Chuan Tan,Yi Tan,Yawen Liu,Yikun Huang,Tao Duan,Lin Zhu
To address the competitive adsorption of NO 2 during gaseous iodine capture from spent fuel reprocessing off-gas, a hydrazine-functionalized aluminum-based metal-organic framework, CAU-10-N 2 H 3 , was constructed based on CAU-10. Considering the difference in kinetic diameter between I 2 and NO 2 , hydrazine functionalization was employed to synergistically regulate the pore size and pore electronic environment. After the introduction of -N 2 H 3 , the median pore size decreased from 0.6174 to 0.5186 nm, and the NO 2 uptake was reduced by 42.91%. Meanwhile, the introduced electron-rich -N 2 H 3 groups strengthened the interaction between the framework and iodine species, leading to adsorption capacities of 551.99 and 155.93 mg·g −1 for I 2 and CH 3 I, respectively, at 150 °C. Dynamic breakthrough experiments further showed that the I 2 adsorption capacity was only slightly affected by NO 2 , decreasing from 259.3 mg·g −1 under N 2 to 218.8 mg·g −1 under 5% NO 2 . Mechanistic analyses revealed that the introduced -N 2 H 3 groups promoted the conversion of I 2 into polyiodide species, thereby strengthening both iodine adsorption and fixation. These results demonstrate that introducing electron-rich functional groups to synergistically regulate pore size and pore environment is an effective strategy for improving the selective iodine capture performance of Al-MOFs in complex spent fuel reprocessing off-gas.
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2026
·
IF 5.2
Yongqian Shen,Xineng Zhu,Pengfei Song,Guibin Zhang,Fulong Yang,Pingbo Wang,Fupeng Zhi,Weicheng Ta,Xueyan Du
The rapid advancement of communication technology has heightened concerns over electromagnetic pollution. Developing absorptive materials with dual-loss mechanisms through dielectric and magnetic loss integration offers an effective solution for impedance matching and interference reduction. Herein, Al-based FeCoNiAl multi-principal element solid-solution alloy-decorated carbon nanofibers (FeCoNiAl/CNFs) were synthesized via electrospinning and carbothermal reduction. This system, with a designed molar ratio of 1:1:1:10 (Fe:Co:Ni:Al), strategically leverages the high aluminum content to tailor electromagnetic functionality. The Al matrix actively down-regulates conductivity to optimize impedance matching, while the FeCoNi combination ensures strong and tunable magnetic loss. This design achieves a unique synergy of lightweight character, strong attenuation, and enhanced stability, all underpinned by the formation of a single solid-solution phase, as confirmed by XRD analysis showing three strong diffraction peaks without impurities. At an optimal reduction temperature of 1000 °C, the FeCoNiAl/CNFs composite exhibits a minimum reflection loss (RL min ) of –25.0 dB at 6.08 GHz and an effective absorption bandwidth (EAB) of 2.16 GHz (5.04–7.20 GHz) at a matching thickness of 3.0 mm. The superior performance originates from synergistic dielectric polarization, magnetic resonance, and optimized impedance matching enabled by the tunable Al-based solid-solution alloy. This work provides a novel and rational strategy for designing lightweight, stable, and high-performance microwave absorbers with industrial applicability.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 103
·84937-84946
·
IF 3.84
Weiya Huang,Xiang Yu,Dan Li
In this paper, flower-like microspheres of Ni/Al mixed oxide (Ni/Al-CLDH-H), which consist of a hollow core and mesoporous shell, were prepared with the aid of sulfonated polystyrene beads. Thanks to the unique structure, the adsorption performance of the sample toward Congo red (CR) was higher than that of the sample Ni/Al-CLDH-S consisting of a solid core and mesoporous shell, which was prepared in the absence of sulfonated polystyrene beads. The Langmuir, Freundlich, Temkin, Dubinin–Radushkevich, Redlich–Peterson and Sips isotherm models were utilized to describe the adsorption process of Ni/Al-CLDH-H; the Sips model was found to best fit the adsorption data. The adsorption kinetics of CR onto Ni/Al-CLDH-H followed the pseudo-second-order model best, compared with the use of the pseudo-first-order and Elovich models. The thermodynamic study showed that the adsorption process was endothermic and spontaneous in nature. Our newly developed material retained a superior adsorption capacity without a significant loss after a number of adsorption–desorption cycles; indicating its potential as a reusable adsorbent for efficient removal of CR in water.
研究领域:
环境科学
·
材料化学
·
水处理
·
吸附技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Chao Xu,Xuetong Zhao,Lulu Ren,Jianjie Sun,Lijun Yang,Jing Guo,Ruijin Liao
Highly dense CaCu 3 Ti 4 O 12 (CCTO) ceramics co-doped by ZnO and Al 2 O 3 were synthesized by spark plasma sintering (SPS) at 750 °C for 10 min, and then annealed at 1000 °C for 3 h. The homogeneous microstructures were achieved, and the grain size was suppressed to around 2 μm. Dramatically enhanced electrical properties of CCTO ceramics were obtained when 1 mol% ZnO and Al 2 O 3 were co-doped. The breakdown field was improved to 12.13 kV/cm and the nonlinear coefficient was increased to 6.59, accompanying with a low dielectric loss of 0.02 at around 1 kHz, which were ascribed to the elevation of Schottky barrier height from 0.54 eV to 0.80 eV. Comparing with the pure CCTO sample, the activation energy of grain boundary obtained from the impedance spectra increases from 0.64 eV to 0.92 eV. Additionally, the grain and grain boundary resistance were also discussed based on the Cole-Cole plot, from which the grain boundary resistance was found to be increased significantly from 3.8 × 10 5 Ω to 4.0 × 10 6 Ω after co-doping.
研究领域:
材料科学
·
陶瓷
·
电气工程
·
固体物理
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Chunfu Liu,Chenyu Zhu,Han Wang,Shenao Xie,Junyang Zhou,Hongjun Fang
Co-doped metal organic frameworks (MOFs) were fabricated by a facile route and applied to remove (tetracycline, congo red, methylene blue and rhodamine B) through integrated adsorption and photocatalysis . The assembled MOFs composite exhibited larger S BET (889 m 2 /g), broad light adsorption, and accelerated carrier kinetics, which helped to enhance adsorption and photocatalysis performance. Specifically, nearly 100% TC (40 mg/L) could be removed by the Co-MIL-10 within 12 min solar-light irradiation, significantly faster than that of solo MIL-53(Al) (82%) and CoAl-LDH (54%), separately. Furthermore the obtained rate constant (0.2064 min −1 ) was 4.8 times and 9.7 times greater than that of MIL-53(Al) and CoAl-LDH, respectively. The quenching/EPR characterization suggested that photo-generated h + / • O 2 − / • OH species were responsible for TC oxidation , of which h + showed the great impact. Cycling experiments verified the robust stability of the MOFs catalyst. As well, an underlying photocatalytic mechanism of the current system was investigated in detail.
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2022
·Vol. 33
·期 12
·4290-4301
·
IF 3.348
Ping Lyu,Yongbo Hou,Rongzhen Wang,Mingliang Ma,Yan Chen,Qiyang Xing,Yong Ma,Shuang Wang,Yuefeng Wu,Weibo Huang
The flame retardant zinc ferrite@Mg-Al-sodium dodecyl benzene sulfonate layered double hydroxide (ZnFe 2 O 4 @Mg-Al-SDBS LDH) was prepared successfully by simple hydrothermal method and co-precipitation method. ZnFe 2 O 4 nanoparticle was used as the core on which Mg-Al LDH was encapsulated to form a spherical structure with a lamellar intercalation layer. The microstructure, the phase structure, and the thermal properties of flame retardant were characterized in detail. Compared with pure polyurea (PUA), the total heat release (THR), peak heat release rate (PHRR) and smoke factor (SF) of PUA/ZnFe 2 O 4 @Mg-Al-SDBS LDH 3.0 wt% decreased by 17.64%, 20.13%, and 28.42%, respectively. In the combustion process, Mg-Al LDH could generate porous metal oxides (Al 2 O 3 and MgO), and ZnFe 2 O 4 could also be decomposed into ZnO and Fe 2 O 3 . These oxides catalyzed cross-linking of polymer molecules, to promote the formation of a dense char layer, and isolated heat and combustible gases from the underlying material. The improved flame retardant properties of the modified intercalated microspheres could be attributed to catalytic carbonization and physical barrier. Moreover, the mechanical properties of PUA composites were tested by universal tensile testing machine. The results showed that the addition of ZF@MASL flame retardant had little influence on the mechanical properties of PUA composites.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2022
·
IF 8.431
Luan Minh Nguyen,Ngoan Thi Thao Nguyen,Thuy Thi Thanh Nguyen,Dai Hai Nguyen,Duyen Thi Cam Nguyen,Thuan Van Tran
The global occurrence of textile dyes pollution has recently emerged, posing a serious threat to ecological systems. To abate dye contamination, we here developed a novel magnetic porous CoFe 2 O 4 @MIL–53(Al) nanocomposite by incorporating magnetic CoFe 2 O 4 nanoparticles with MIL–53(Al) metal–organic framework. This nanocomposite possessed a surface area of 197.144 m 2 g −1 and a pore volume of 0.413 cm 3 g −1 . The effect of contact time (5–120 min), concentration (5–50 mg L −1 ), dosage (0.1–1.0 g L −1 ), and pH (2–10) on Congo red adsorption was clarified. CoFe 2 O 4 @MIL–53(Al) could remove 95.85% of Cong red dye from water with an accelerated kinetic rate of 0.6544 min −1 within 10 min. The kinetic and isotherm models showed the predominance of Bangham and Temkin. According to Langmuir, the maximum uptake capacities of CoFe 2 O 4 @MIL–53(Al), CoFe 2 O 4 , and MIL–53(Al) adsorbents were 43.768, 17.982, and 15.295 mg g −1 , respectively. CoFe 2 O 4 @MIL–53(Al) was selected to optimize Cong red treatment using Box–Behnken experimental design. The outcomes showed that CoFe 2 O 4 @MIL–53(Al) achieved the highest experimental uptake capacity of 35.919 mg g −1 at concentration (29.966 mg L −1 ), time (14.926 min), and dosage (0.486 g L −1 ). CoFe 2 O 4 @MIL–53(Al) could treat dye mixture (methylene blue, methyl orange, Congo red, malachite green, and crystal violet) with an outstanding removal efficiency of 81.24% for 30 min, and could be reused up to five cycles. Therefore, novel recyclable and stable CoFe 2 O 4 @MIL–53(Al) is recommended to integrate well with real dye treatments systems.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2023
·Vol. 148
·期 11
·4731-4743
·
IF 4.4
Kang Furu,Deng Jun,Pang Qingtao,Yuan Chao,Liu Bo,Yi Xin,Li Hang
Silicone foams (SiFs) are high-performance materials but can combust and release choking smoke in a fire. In this paper, the modified microencapsulated Mg/Zn/Al-layered double hydroxide (MLDHs) was prepared by the sol–gel method. Then, the structure and performance of modified MLDHs were characterized by field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetry (TG), and differential scanning calorimetry (DSC). Besides, the mechanical properties, flame retardancy, smoke suppression, thermal degradation behavior, morphology and composition of carbon slag of SiFs with modified MLDHs were tested using the universal tensile testing machine, limiting oxygen index (LOI), UL-94 test, cone calorimeter, thermogravimetry, SEM–EDS and XPS. The results indicated that the modified MLDHs could effectively improve the ductility of SiFs. When the addition of modified MLDHs exceeded 20 mass%, SiFs could be improved to UL-94-V0 rating. The PHRR, THR, and TSP of SiFs with 30 mass% modified MLDHs were 56.04%, 46.86%, and 80.49% lower than that of pure SiFs. Furthermore, the decomposition products of modified MLDHs/SiFs composite such as SiO 2 and zinc magnesium aluminum oxide could improve the char formation significantly. The continuous, complete, and dense structure of carbon slag of modified MLDHs/SiFs could effectively block the exchange of heat and gas on the surface of SiFs and reduce the combustion performance of SiFs.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2022
·
IF 6.267
Zhengwei Guo,Guojian Lin,Lu Li,Peng Cao,Zhentao Yuan,Xiao Wang,Quan Shan,Zulai Li
This study aims to achieve synergistic strength-ductility enhancement of semi-solid squeeze cast 6TiB 2 /Al–17Si–4Cu composites through in-situ particle strengthening and T6 heat treatment. The microstructure and mechanical properties of 6TiB 2 /Al–17Si–4Cu composites with different heat treatments were investigated. TiB 2 particles are semi-coherent with α-Al and primary Si, respectively. The nanoscale precipitate phases were determined by their crystal orientation relationships. The results showed that they are θ and θʹ phases. Meanwhile, the research results pertaining to the mechanical properties imply that the strength and ductility are enhanced by the TiB 2 particles and Al 2 Cu precipitates. The optimum heat treatment process (solution treatment for 9 h at 520 °C and aging for 8 h at 170 °C) of strengthened 6TiB 2 /Al–17Si–4Cu composites is revealed in this study, when the ultimate tensile strength and elongation of the composites are 263.3 MPa and 0.51%, respectively. The mechanisms governing the enhanced strength and ductility of 6TiB 2 /Al–17Si–4Cu composites were discussed.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）