FUEL
·
2023
·
IF 7.4
Zhichao Yu,Xin Liu,Yang Liu,Yuan Li,Zhuohan Zhang,Kangli Chen,Shumin Han
Multiple catalysts have exhibited high activity on improving the hydrogen storage performance of MgH 2 . Herein, the hydrogen ab/desorption kinetics of MgH 2 is significantly improved by using Ni@C@CeO 2 as the catalyst. The results show that 10 wt%-Ni@C@CeO 2 doped MgH 2 can absorb 4.51 wt% hydrogen within 60 min under low temperature 75 °C. Furthermore, the MgH 2 -Ni@C@CeO 2 composites release approximately 4.88 wt% H 2 within 10 min at 325 °C. Moreover, the composites show excellent cycling performance, with negligible decrease in hydrogen storage capacity, hydrogen uptake rate and hydrogen release rate after ten cycles at 350 °C. The Rietveld refinement of X-ray diffraction and transmittance electron microscopy measurements reveal that Mg 2 NiH 4 /Mg 2 Ni and CeH 2.73 phases are in-situ formed. The mutual conversion of “Mg 2 Ni/Mg 2 NiH 4 ” during hydrogen ab/desorption is a well-known “hydrogen pump” effect, which improvs the hydrogen storage performance of MgH 2 . The presence of CeH 2.73 accelerate the conversion of Mg 2 Ni/Mg 2 NiH 4 , which we call ‘facilitated hydrogen pump’ effect. This attempt paves a potential way to achieve high performance Mg-based composites hydrogen storage materials via collaborative action between Ni and Ce species.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Ziyue Peng,Yuqi Du,Mingrui Song,Chongkai Sun,Yuan Xu,Jikun Qian,Xin Guan,Mankai Yang,Xin Zhang,Fangfang Dai,Haoyang Wan,Yuhang Chen,Chun Liu,Bin Yu
Implant-associated infections frequently complicate orthopedic surgeries, resulting in challenging issues. The current therapy of antibiotic treatment and surgical debridement often leads to drug resistance and bone defect. The development of pH-responsive antimicrobial and pro-osteogenic materials is a promising approach to controlling infections and repairing infected bone defects, especially given the weakly acidic pH of the bacterial infection area. Solid peroxides have the potential to provide a sustained release of hydrogen peroxide (H2O2), rendering them applicable for antimicrobial purposes. Additionally, their chemical properties render them inherently responsive to pH. Here, we propose a novel GelBA/PVA/MgO2 hydrogel composed of gelatin (Gel), benzeneboronic acid (BA), poly(vinyl alcohol) (PVA), and magnesium peroxide (MgO2) with self-healing ability and pH-responsiveness. The borate ester bond formed between PVA and BA is a dynamic chemical bond with properties of dynamic formation and dissociation, making the hydrogel both self-healable and pH-responsive. Meanwhile, the addition of MgO2 improves the network structure of the hydrogel and gives the hydrogel the ability to perform sustained release of H2O2 and Mg2+. Experimentally, the GelBA/PVA/MgO2 hydrogel exhibits controlled and pH-dependent H2O2 and Mg2+ release, sustained over time at physiological pH (7.4) and significantly increased at infection pH (5.5). In vitro and in vivo outcomes revealed that this hydrogel is able to inhibit Staphylococcus aureus growth and accelerate bone regeneration, improving bone healing without cytotoxic effects on normal tissues. These findings suggest that the GelBA/PVA/MgO2 hydrogel is a unique and efficient approach for anti-infection and therapeutic implant-associated infections.
研究领域:
生物材料学
·
医学工程
·
感染与免疫
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Lina Wang,Peiyi Yan,Huairui Chen,Zhuo Li,Shu Jin,Xiaoxiang Xu,Jun Qian
Narrow bandgap semiconductor MgIn 2 S 4 has been readily grown onto In 2 O 3 nanofibers by an in situ growing method. The so-formed MgIn 2 S 4 -In 2 O 3 hybrid nanofibers are characterized by strong visible light absorption and intimate MgIn 2 S 4 /In 2 O 3 heterointerfaces. Under visible light illumination ( λ ≥ 400 nm), the hybrid nanofibers demonstrate an exceptionally high photocatalytic activity for Escherichia coli ( E. coli ) disinfection, outcompeting pristine MgIn 2 S 4 , naked In 2 O 3 nanofibers, and many other photocatalytic systems reported. Specifically, the hybrid nanofibers achieve a 7 log reduction in viable cells for merely 20 min illumination while pristine MgIn 2 S 4 and naked In 2 O 3 nanofibers alone are almost inactive. Further analysis indicates that the hybrid nanofibers essentially form a type-II semiconductor heterojunctions which enable spatial separation of photocarriers. Owing to the intimate heterointerfaces, photocarriers can be promptly separated and accumulated respectively in In 2 O 3 and MgIn 2 S 4 thereby allowing continuous generation of copious reactive species for disinfection. This work signifies the usefulness of heterointerfaces in promoting photocarrier separation and provides a useful strategy to upgrade photocatalytic performance from otherwise almost inactive semiconductors.
研究领域:
材料科学
·
光催化
·
纳米材料
·
环境科学
·
微生物学
✓ 已验证
DOI
高影响因子
Inorganics
·
2024
·Vol. 12
·期 11
·273
·
IF 3.1
Quan Yang,Xiansong Jia,Zhikang Qin,Xiaoli Ding,Yongtao Li
Carbon-based materials with excellent catalytic activity provide new ideas for the development of magnesium-based hydrogen storage. C-H bonding interactions may play a key role in performance improvement. In this work, we comprehensively compare the magnesium-carbon cloth composites (CC) prepared by method of dry ball milling and wet impregnation. The results were that the hydrogen release activation energy (Ea) of MgH2@CC composites prepared by wet immersion method was 175.1 ± 19.5 kJ·mol−1, which was lower than that of pure MgH2(Ea= 213.9 ± 6.4 kJ·mol−1), and the activation energy of MgH2-CC composites prepared by ball milling method was 137.3 ± 8.7 kJ·mol−1, which provided better results. The kinetic enhancement should be attributed to C-H interactions. The presence of carbon carriers and electron transfer to reduce the activation energy of Mg-H bond fracture. These results will provide further insights into the promotion of hydrogen ab-/desorption from metal hydrides.
研究领域:
材料科学
·
能源化学
·
纳米技术
·
物理化学
·
氢能技术
✓ 已验证
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Mengran Li,Qinke Tang,Lili Yang,Rui Shi,Shihao Chen,Yingzhen Zhu,Yunfeng Zhu,Yao Zhang,Jiguang Zhang,Yana Liu,Jun Wang,Zhixin Ba
Magnesium-based hydrogen storage alloy serves as an ideal substance for hydrogen storage and transportation because of its high hydrogen storage capacity, low expense, and eco-friendly properties. However, the stable thermodynamic properties and poor kinetic properties during de/hydrogenation limit its application. In this work, a novel high-efficiency catalyst CeF 3 was successfully synthesized and induced into Mg 90 Al 10 , which exhibited excellent performance during de/hydrogenation. In particular, the Mg 90 Al 10 + 8 wt% CeF 3 can absorb 4.0 wt% hydrogen within 600 s at 200 °C, and release 4.3 wt% hydrogen within 900 s at 275 °C, better than the Mg 90 Al 10 that can only absorb 1.36 wt% and release 0.3 wt% hydrogen in similar conditions. Meanwhile, the introduction of CeF 3 can also decrease the dehydrogenation apparent activation energy (E a ) of Mg 90 Al 10 obviously from 155.95 kJ/mol to 79.31 kJ/mol. The Al 4 Ce and MgF 2 formed in situ, combined with the high thermal conductivity of Al in charge of the good hydrogen storage behavior of Mg 90 Al 10 + 8 wt% CeF 3 . The study results are of great importance for applying Mg-Al hydrides in solid-state hydrogen storage.
研究领域:
储能
·
材料科学
·
催化
·
氢能
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Jinbo Yang,Min Zhang,Yanwei Zhang,Lei Ding,Jing Zheng,Jingli Xu
This study reports the fabrication of hierarchical magnetic magnesium silicate hollow nanotubes . Owing to its unique structure and high surface area (539.36 m 2 g −1 ), the as-prepared hierarchical magnetic hollow nanotubes exhibit excellent adsorption performance on uptake of methylene blue (MB). Particularly, this strategy can be extended as a general method to prepare other magnetic metal silicate hollow nanotubes.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2024
·
IF 1.8
Guo-rong Ji,Ming Feng,Huilan Hao,Yunfeng Gao,Baoshun Zhu,Yu-ming Tian
In this study, varying amounts of MnO 2 up to 5 wt.% were added to magnesium aluminate spinel (MA) bodies using a solid-state sintering method at 1200–1600°C. The effect of MnO 2 addition on the phase composition, microstructure, distribution of elements, and ionic valence of MA was investigated via X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy, and X-ray photoelectron spectroscopy, respectively. The results showed that Mg 2+ ions in MA crystals were replaced by Mn 2+ ions, resulting in the formation of the (Mg 1- x Mn x )Al 2 O 4 solid solution. The distorted crystal structures promoted the sintering reactions, and the mechanical characteristics of MA were greatly improved by the solid solution strengthening process. When the additive amount of MnO 2 was 5 wt.% and the sintered temperature reached at 1600°C, excess manganese ions hardly dissolved into the lattice of MA. And these ions were only distributed at the grain boundaries of MgAl 2 O 4 , forming a “barrier” that hindered the migration and diffusion of particles, thereby suppressing the sintering process and weakening the mechanical strength of MA.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Faizal Soyekwo,Hui Wen,Dan Liao,Changkun Liu
Lithium separation is of great significance to overcome the lithium supply shortage resulting from a heightened demand in the energy sector. The low selectivity of polymer nanofiltration membranes for lithium extraction from concentrated Mg/Li mixtures caused by miniaturized pore structures and weak and unstable positive surface charges limits their practical implementation. To address the surface charge strength and stability, a novel ionic liquid monomer, N1-(6-aminohexyl)-N1,N1,N6,N6,N6-pentamethylhexane-1,6-diaminium bromide (denoted as DABIL), is first synthesized and covalently anchored on a pristine polyamide thin-film composite (TFC) membrane via a secondary amidation reaction for improved selective lithium separation from Mg/Li mixtures. DABIL modification of the polyamide network contributes to increased surface hydrophilicity, an enlarged membrane pore structure, and reinforced Donnan exclusion effects. Molecular dynamics simulation confirmed that the difference of the interaction energies between water and the multication groups dominates the surface properties. The DABIL membrane exhibits sixfold enhancement of water permeability compared to the unmodified membrane and outperforms the recently reported state-of-the-art positively charged membranes. It presents an improved Li+/Mg2+ selectivity of 26.49, suggesting the membranes’ potential for lithium recovery. Moreover, the membrane shows efficient antibacterial activity for mitigating biofilm formation. We establish that functionalization of TFC membranes with ionic liquids containing multication side chains could be a promising approach to achieve improved and sustainable permselectivity for the recovery of critical metal resources.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
DOI
高影响因子
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
·
2018
·Vol. 25
·期 3
·1003-1013
·
IF 1.774
Youyuan Wang,Can Wang,Zhanxi Zhang,Kun Xiao
This paper reports on the anti-thermal aging ability enhanced by nanoparticles for polyethylene based nanocomposites. Nanocomposites with concentration of 1 wt% were prepared by using silicon dioxide (SiO
2
), zinc oxide (ZnO) and magnesium oxide (MgO) nanoparticles. Fourier-transform infrared spectra showed that the low-density polyethylene (LDPE)/MgO nanocomposites had the best anti-thermal aging ability in comparison with the LDPE/SiO
2
nanocomposites, which had the worst anti-thermal aging ability. Subsequently the ability of nanocomposites to ensure the electrical properties was examined by dielectric properties and space charge distribution. The results show that LDPE/MgO and LDPE/ZnO nanocomposites retained the value and the relaxation peaks of permittivity to a certain extent after thermal aging. All of the nanocomposites presented the ability for suppression of space charge accumulation after thermal aging compared with neat LDPE with the observation of obvious homocharges accumulated near electrodes. We find that the interface between nanoparticles and matrix may be the reason for the anti-thermal aging ability exhibited by the nanocomposites.
研究领域:
材料科学
·
电气工程
✓ 已验证
DOI
高影响因子
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
·
2023
·Vol. 30
·期 10
·2021-2030
·
IF 2.5
Liu Hao,Zhu Yu-xuan,Wang Zhou-fu,Ma Yan,Wang Xi-tang
Magnesia castables have been widely used in metallurgical industries with the advantages of high refractoriness, non-polluting steel, and resistance to alkaline slag. Magnesia castables were prepared using strontium carbonate (SrCO 3 ) as additive to enhance slag resistance and mechanical properties, and the influence of SrCO 3 on the evolution of phases, microstructure and properties of magnesia castables sintered at different temperatures was clarified. The results show that, with the introduction of SrCO 3 (lower than 3 wt.%), elastic modulus, mechanical strength, thermal shock resistance and densification of magnesia castables were significantly enhanced owing to the formation of needle-like Ca 0.9 Sr 0.1 MgSi 2 O 6 phase and liquid phase when sintering at high temperatures, and the introduced SrCO 3 presented minor effects on the mechanical properties of castables for its highly structural stability below 1100 °C. During the slag corrosion process, SrCO 3 and SiO 2 in castables reacted with Al 3+ in molten slag to form SrAl 2 SiO 8 phase, resulting in the increased slag viscosity and suppressed continuing penetration.
研究领域:
材料科学
·
冶金工程
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Ziqi Liu,Ruolin Zhao,Feifan Hong,Sizhi Ding,Jiakun Yang,Renhuan Li,Yi Fan,Haizhen Liu,Jin Guo,Zhiqiang Lan
Hydrogen storage materials are the primary solution for addressing safety concerns in hydrogen energy storage and transportation. Despite the advantages of magnesium-based hydrogen storage materials, such as high capacity and good reversibility, their poor kinetic performances severely limit their practical applications. In this study, the synthesis of titanium nitride supported on carbon (TiN@C) was achieved through a controllable hydrothermal method , aiming to enhance the hydrogen storage performances of MgH 2 .With the catalytic action of TiN@C, MgH 2 could rapidly release over 6.0 wt% of hydrogen at 300 °C within 15 min, while the onset dehydrogenation temperature decreased to 226 °C. The dehydrogenated MgH 2 could reabsorb 5.80 wt% of hydrogen at 200 °C for 15 min with a reduced activation energy of 44.9 kJ·mol −1 , demonstrating excellent kinetic performance. Mechanism analysis revealed that the multiphase interface between MgH 2 (Mg) and TiN@C significantly improved the hydrogen desorption kinetics of materials, especially TiN and the in-situ formed TiH 2 were the main reasons for improving the hydrogen storage performance of materials.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Jiayu Lin,Wenwen Luo,Zhanwen Wu,Haiyan Leng,Chenghua Sun,Qian Li,Chengzhang Wu
In the present work, three kinds of γ-MnS with different morphologies were prepared by solvothermal method and employed to improve the hydrogen storage properties of MgH 2 . It was found that spherical γ-MnS had the best catalytic activity. The influences of γ-MnS content and milling time on the hydrogen storage performance of MgH 2 were investigated. The initial hydrogen release of MgH 2 -5(γ-MnS)-5 h composite started at 241 ℃, 4.61 wt% of hydrogen was desorbed within 20 min at 270 ℃, and 4.24 wt% of hydrogen was absorbed within 10 min at 150 ℃. The apparent activation energies of hydrogen absorption and desorption of MgH 2 -5(γ-MnS)-5 h composite decreased to 45.1 and 63.6 kJ/mol, respectively. In addition, the composite also exhibited good cycle performance, which could keep stable in 60 cycles. The results of SEM and TEM declared that the catalyst was uniformly distributed on the matrix during the cycling process, and the worm-like morphology of the sample also had a positive effect on the stability of kinetics. XPS analysis of Mn 2p in the samples showed that only characteristic peaks of γ-MnS 2p were observed in the ball-milled samples, but the characteristic peaks of Mn 2p and α-MnS 2p were observed in the first and tenth hydrogenated samples, while only the peaks of Mn 2p were observed in the sixtieth hydrogenated sample. The formation of Mn not only greatly weakened the Mg-H bond, but also led to a slight increase in cycle capacity. Therefore, γ-MnS-doped MgH 2 manifested a good comprehensive hydrogen storage performance.
研究领域:
材料科学
·
能源储存
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）