JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Zijian Liao,Mingliang Ma,Yuxin Bi,Zhouyu Tong,Kwok L. Chung,Zijian Li,Yong Ma,Binglong Gao,Zhengkai Cao,Ranran Sun,Xiang Zhong
Advanced microwave absorption (MA) materials have attracted widespread attention to meet the challenges of electromagnetic (EM) pollution. Herein, MgFe 2 O 4 /MgO/C fibers were successfully prepared via electrospinning technology and carbonization , and their surfaces were coated by MoS 2 via hydrothermal method . The EM wave absorption performance of composites was enhanced due to the introduction of MoS 2 . The results showed that the EM wave absorption performance of MgFe 2 O 4 /MgO/C could not meet the requirements due to low dielectric loss and poor impedance matching. The performance of the composites was improved after coating of MoS 2 , which showed the strong wave absorption capability and the broad absorption bandwidth. The optimal reflection loss (RL) is −56.94 dB at 9.5 GHz and the effective absorption bandwidth is 3.9 GHz (8.08–11.98 GHz) with a thickness of 2.7 mm. The excellent MA performance can be mainly attributed to excellent synergistic effect between MgFe 2 O 4 /MgO/C and MoS 2 . Furthermore, MoS 2 also contributes to dielectric loss and ideal impedance matching. MgFe 2 O 4 /MgO/C@MoS 2 composites may be utilized for lightweight and high-efficient MA materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
·
2024
·
IF 3.1
Chen Yang,Li Zeng-yi,Tan Hao-bo,Fu Yu-ran,Ding Jun,Deng Cheng-ji,Yu Chao
To solve the problem of poor high-temperature service performance caused by low carbonization of MgO–C refractories, low-carbon MgO–C refractories with excellent thermal shock, oxidation and corrosion resistances were successfully designed by using SiC whiskers as reinforcing phases and introducing micro-Al 2 O 3 powders as additives. The results indicated that the addition of micro-Al 2 O 3 powders optimized the internal structure of the material, like the columnar β-Si 3 N 4 with a stepped distribution and the mosaic structure formed between granular and flaky Mg 2 SiO 4 , which synergistically strengthened and toughened the material and gave the material excellent mechanical properties and thermal shock resistance. Specifically, the cold modulus of rupture and cold crushing strength after thermal shock were increased by 4.1 and 20.3 MPa, respectively. Moreover, the addition of micro-Al 2 O 3 powders promoted the formation of fine particles of Mg 2 SiO 4 , MgAl 2 O 4 and MgO, as well as a dense protective layer of Mg 2 SiO 4 in the material under high-temperature environment. Furthermore, spinel and high-temperature solid solution were formed in the corrosion environment. The oxidation and corrosion resistances were greatly improved by 41% and 15%, respectively.
研究领域:
材料科学
·
冶金工程
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2020
·
IF 4.419
Yang Chen,Chengji Deng,Xing Wang,Jun Ding,Chao Yu,Hongxi Zhu
Si 3 N 4 -MgO-C refractories were prepared using fused magnesia, flake graphite, and Si powder-supported Fe(NO 3 ) 3 ·9H 2 O as the raw materials and phenolic resin as the binder under the flow of N 2 . The effect of different nitriding temperatures on the morphology and production of Si 3 N 4 in the uncatalyzed refractories was investigated. The effect of the morphology of β-Si 3 N 4 on the properties of the refractories with different catalyst contents was investigated. The oxidation resistance of the refractories was also investigated. The results showed that the increase in the nitriding temperature was beneficial for the formation of β-Si 3 N 4 in the refractories. However, very high nitriding temperatures generated a large number of pores in the refractories and deteriorated their properties. The refractory with 1 wt% catalyst exhibited good mechanical properties and oxidation resistance. However, the addition of excessive catalyst inhibited the formation of β-Si 3 N 4 and deteriorated the performance of the refractories.
研究领域:
材料科学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2024
·
IF 6.2
Shutong Fan,Chengji Deng,Chao Yu,Zhenglong Liu,Jun Ding
To solve the problem of deterioration of oxidation resistance and thermal shock resistance caused by low carbonization of MgO–C refractories, nano-laminated BN modified graphite was prepared by the molten salt method to reinforce unfired MgO–C refractories. The findings revealed that the introduction of nano-laminated BN modified graphite significantly improved the mechanical properties. Moreover, the oxidation index of MgO–C refractories with 4 wt% nano-laminated BN modified graphite was 34% lower than that of the unadded sample, and the residual strength after thermal shock was significantly increased by 224%. Furthermore, incorporating nano-laminated BN modified graphite facilitated the formation of columnar Mg 2 SiO 4 , octagonal columnar MgAl 2 O 4 , and MgO–Mg 2 SiO 4 –MgAl 2 O 4 –Mg 3 B 2 O 6 dense layers, thereby contribute to overall performance improvements.
研究领域:
材料科学
·
陶瓷与耐火材料
·
纳米材料
·
复合材料
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2026
·
IF 6
Boya Hao,Gang Hou,Zewei Liu,Zeyuan Lei,Chongyi Wang,Bofeng Zhang,RongRong Zhang,Xingjie Wang,Jiafei Lyu,Guozhu Liu
The growing demand for sustainable aviation fuel (SAF) makes extending the carbon chain from ethanol a strategy well worth pursuing. Herein, a series of Ni/MgO@C catalysts derived from Ni/Mg bimetallic metal–organic frameworks (MOFs) was evaluated for the Guerbet coupling of ethanol to higher alcohols within the alcohol-to-jet (ATJ) strategy. Owing to the isolated metal nodes in the periodic framework, highly dispersed Ni species on the magnesium-based solid supports with abundant basic sites have been accessed. The catalyst with a Ni/Mg molar ratio of 0.13 achieved a higher alcohol yield of 55.5% at 88.4% ethanol conversion under 2 MPa N2 at 240 °C for 10 h. Upon extending the reaction to 24 h, C8–C16+ alcohols accounted for 41.4% of the alcohol product pool. Comprehensive catalyst characterization combined with theoretical calculations revealed that the involvement of Ni species can accelerate the dehydrogenation step, while an appropriate Niδ+/Ni0 ratio can be critical for efficient carbon chain elongation by promoting alcohol dehydrogenation to aldehyde and simultaneously suppressing their deep decomposition through weakened interaction with the catalyst surface.
✓ 已验证
DOI
高影响因子
IONICS
·
2026
·
IF 3.4
Zhang Lingwen,Qin Wenqing,Long Jifa,Xiao Qi,Huang Suping
The persistent shuttle effect of lithium polysulfides (LiPSs) remains a major bottleneck hindering the widespread commercialization of lithium-sulfur (Li-S) batteries. Among the proposed solutions, MgO@carbon (MgO@C) composite interlayers have emerged as a highly effective strategy for suppressing LiPS migration through chemical adsorption and catalytic conversion. However, conventional synthesis routes for these materials often rely on costly and intricate chemical processes, limiting their scalability. In this study, we present an eco-friendly and cost-effective approach by fabricating MgO@C composites from dye sludge-derived carbon. The resulting nanoporous MgO@C interlayer exhibits strong hydrophilicity and abundant active sites, enabling efficient polysulfide immobilization via chemisorption while simultaneously accelerating sulfur redox kinetics. This dual functionality not only mitigates the shuttle effect but also enhances battery capacity and cycling stability - delivering exceptional electrochemical performance. This work offers a strategic approach for converting waste into valuable materials, paving the way for the scalable fabrication of high-performance interlayers in practical Li-S battery applications.
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yunkai Liang,Jia Ning,Suli Lan,Bo Chen,Jinlin Zhang,Qian Zhang,Ning Wang,Yunjia Song,Changyi Li,Ying Li
Traumatic oral ulcers, arising from local physicochemical or mechanical stimuli, exhibit considerable discomfort, an extended healing period, and a potential for malignant transformation. Existing etiological treatments mainly include antibacterial therapy and promoting ulcer healing. Nevertheless, antibacterial therapy using antibiotics may cause unexpected side effects and drug resistance. Additionally, commonly used wound-healing drugs, such as growth factors and glucocorticoids, have drawbacks including instability, high cost, and systemic adverse reactions. To address these issues, a magnesium-incorporated photosensitive metal-organic framework (MOF) derivant, denoted as MgO/C, was developed by pyrolysis of Mg-MOF74. The MgO/C was characterized using scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The established MgO/C showed an excellent photothermal antibacterial performance upon prevalent oral ulcer pathogens under near-infrared light irradiation, featured by antibacterial rates of 97.8 % and 96.5 % against Streptococcus mutans and Staphylococcus aureus , respectively. Moreover, the MgO/C exhibited controlled release of magnesium ions for up to four days and effectively enhanced fibroblast proliferation, migration and adhesion, at an optimal concentration of 200 ppm. A rat traumatic oral ulcer model demonstrated that the MgO/C+NIR group could facilitate ulcer healing in vivo , resulting in an increase of wound healing rate by 23.4 %, in comparison to the control on day 3. Our study revealed that MgO/C had great potential for the treatment of traumatic oral ulcers.
研究领域:
材料科学
·
生物医学工程
·
药学
·
牙科
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Jing Zhou,Xingang Li,Jinze Du,Lin He,Chengyang Wang,Hong Sui
A new resourcezation way has been proposed to address the treatment challenges of the light phenolic distillation residue (LPDR) from the coal-based phenolic distillation residue. Herein, the LPDR, which was collected at 20 kPa and 220 °C from the phenolic distillation residue, has been further used to synthesize the phenolic resin (named as RPF) for MgO-C refractories. It is found that the conversion efficiency of crude phenol mixture to RPF is 71.3%, which is lower than that of pure phenol. To increase the conversion efficiency and improve the properties of RPF, the crude phenolic mixture was blended with pure phenol for the synthesis. The optimal addition mass ratio of phenol in the crude phenol mixture (phenol/total phenolic compounds) is determined to be 0.8, where the obtained RPF could satisfy or even better than the national standard. Further addition of 10 wt% of urotropine (HMTA) as curing agent and 9 wt% of ferrocene (Fc) as modifier (named as MRPF) are found to significantly improve the graphitization of RPF. Under these conditions, the DTG at temperature of maximum mass lose rate (T max ) of MRPF was lower than that of commercial resin. The graphitization level was as high as 61.6% with the residual carbon rate up to 41.4%, which are higher than those of national standard. These findings provide insights for the resourcezation of the phenolic distillation residue.
研究领域:
化学工程
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2026
·Vol. 40
·期 5
·e70581
·
IF 4.3
Wenjing Song,Zhenhao Xiao,Shuo Yan,Jie Li,Weizuo Li,Haiqun Chen
The chemical fixation of carbon dioxide (CO 2 ) into value-added cyclic carbonates is a promising pathway for carbon utilization; however, developing heterogeneous catalysts with high activity and stability remains a challenge. In this study, a Cu–Mg-MOF-74 precursor was synthesized via a solvothermal method and subsequently transformed into a Cu–Cu 2 O–MgO/C nanocomposite catalyst through a one-step pyrolysis process under N 2 atmosphere at 550°C. The pyrolysis process leads to the collapse of the MOF crystal structure and the formation of highly dispersed Cu–Cu 2 O–MgO nanoparticles embedded in a carbon matrix, while the overall morphology inherited from the MOF precursor remains largely preserved. Detailed characterization (XRD, XPS, TEM, BET, and in situ DRIFTS) reveals that the catalyst possesses a high specific surface area (296.7 m 2 ·g −1 ), abundant Lewis acid sites (Cu, Cu 2 O, and MgO), and surface oxygen-containing groups, which synergistically enhance catalytic performance. Under relatively moderate conditions (90°C, 0.7 MPa, CO 2 , 7 h), the Cu–Cu 2 O–MgO/C catalyst achieved a styrene oxide conversion of 94% with 99% selectivity, significantly outperforming its monometallic and physical mixture counterparts. Furthermore, the catalyst demonstrated excellent substrate versatility and robust recyclability over five consecutive runs without structural collapse. This work provides a facile strategy for fabricating robust MOF-derived carbon-based catalysts for sustainable CO 2 conversion.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）