Journal of Orthopaedic Translation
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2021
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IF 5.191
Minqi Wang,Yiqi Yang,Kai Yuan,Shengbing Yang,Tingting Tang
Background Clinic treatment of diabetic foot ulcers (DFUs) is considerably challenging. Impaired wound healing may be caused by poor vascularization and dysfunction of the extracellular matrix, which leads to poor re-epithelialization and increased risk of infection. In this study, we evaluated the treatment potential of a functional dressing comprising quaternized chitosan (hydroxypropyltrimethyl ammonium chloride chitosan) and magnesium (Mg) on DFUs. Methods Dressings were prepared by vacuum freeze-drying. The cellular proliferation, migration, and angiogenesis potential of the functional dressings were determined in vitro. Methicillin-resistant Staphylococcus aureus (MRSA , ATCC43300) and methicillin-resistant Staphylococcus epidermidis 287 (MRSE287) were used to evaluate the antibacterial efficiency of the dressings. Finally, a diabetic rat model with infected wounds was used to further evaluate the effects of functional dressings on the healing of DFUs. Results Functional dressings facilitated the migration of human dermal fibroblasts and human umbilical vein endothelial cells (HUVECs), while also stimulating angiogenesis in HUVECs. Additionally, the functional dressing could effectively eradicate MRSA and MRSE, exhibiting excellent antibacterial ability against drug-resistant bacteria. The results of in vivo microbiological and histological tests demonstrated effective anti-infection ability and wound-healing potential of this functional dressing. Conclusions The dual-functional dressing exhibited wound-healing ability and anti-infection efficiency, demonstrating potential application prospects in DFU treatment. Translational potential of this article As one of the common and serious complications of diabetes, DFUs do not heal easily, causing great suffering to patients. Therefore, improvement in the prognosis of DFUs is a crucial clinical need. The dual-functional dressing prepared in this study was proven to improve the treatment of DFUs, both in vitro and in vivo. Considering its urgent clinical necessity and good biocompatibility of its raw materials, such as alginate, Mg, and chitosan derivatives, this dual-functional dressing presents good prospects for clinical translation.
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Journal of Energy Storage
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2023
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IF 9.4
Hui Yong,Yiwan Chen,Yanquan Ji,Shuai Wang,Jiangwei Ma,Baosheng Liu,Jifan Hu,Yanghuan Zhang
Solid-state magnesium-based hydrogen storage encounters challenges associated with sluggish hydrogen absorption and desorption kinetics. The incorporation of catalysts is considered a promising means to improve the hydrogen absorption and desorption kinetics of these alloys. In this experiment, we prepared the Mg 80 Ni 15 Y 5 alloy via vacuum melting and incorporated TiF 3 in varying weight percentages of 1, 3, 5, and 7 wt% through ball milling . The phase composition and microstructure of the samples were analyzed and measured using X-ray diffraction meter (XRD), Transmission Electron Microscope (TEM), Selected Area Electron Diffraction (SAED), and Scanning Electron Microscope (SEM) techniques. The results revealed that the TiF 3 introduced two catalytically phases, MgF and TiF 2 . And TiF 2 transforms into TiH 2 after hydrogen absorption, which covers the surface of MgH 2 and prolongs the nucleation time of MgH 2 .Furthermore, the addition of TiF 3 made the surface of alloy markedly coarser and more irregular and few cracks, providing channels for hydrogen diffusion. This behavior optimized the kinetic performance of the alloy. It was observed that the samples containing 7 wt%TiF 3 achieved 99.2 % hydrogen saturation even in low-temperature. It's worth mentioning that the addition of 7 wt% TiF 3 to the Mg 80 Ni 15 Y 5 alloy significantly reduced the dehydrogenation activation energy to 58.5 kJ/mol, as opposed to pure magnesium with an activation energy of 158.2 kJ/mol. This substantial reduction has effectively accelerated the hydrogen absorption and desorption rates of the alloy. However, it had only a negligible impact on the thermodynamic properties of the sample with 7 wt%TiF 3 .
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2021
·Vol. 22
·期 16
·8668
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IF 5.924
Jie Li,Shiyi Wang,Huayin Li,Yuan Tan,Yunjie Ding
The synthesis of ester compounds is one of the most important chemical processes. In this work, Zn-Mg-Al mixed oxides with different Zn2+/Mg2+molar ratios were prepared via co-precipitation method and supported gold nanoclusters to study the direct oxidative esterification of aldehyde and alcohol in the presence of molecular oxygen. Various characterization techniques such as N2-physical adsorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and CO2temperature programmed desorption (TPD) were utilized to analyze the structural and electronic properties. Based on the results, the presence of small amounts of Zn2+ions (~5 wt.%) provoked a remarkable modification of the binary Mg-Al system, which enhanced the interaction between gold with the support and reduced the particle size of gold. For oxidative esterification reaction, the Au25/Zn0.05MgAl-400 catalyst showed the best performance, with the highest turnover frequency (TOF) of 1933 h−1. The active center was believed to be located at the interface between metallic gold with the support, where basic sites contribute a lot to transformation of the substrate.Keywords:gold catalyst;cluster;hydrotalcite;oxidative esterification;methyl isobutyrate
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FUEL PROCESSING TECHNOLOGY
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2019
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IF 4.507
Xiaoping Wu,Qiao Zhang,Lungang Chen,Qiying Liu,Xinghua Zhang,Qi Zhang,Longlong Ma,Chenguang Wang
The development of thermally stable Pt-based catalysts with superior performance for propane dehydrogenation reactions remains a daunting challenge. In this study, a series of PtSn-Mg(Zn)AlO catalysts with different Zn and Pt contents were synthesized by the anion-exchange method for the propane dehydrogenation reaction. To investigate the influence of Zn on the reaction performance and the catalyst structure, the prepared catalysts were characterized with several analytical techniques, including XRD , TEM, HRTEM, H 2 -TPD and CO pulse chemisorption . A good propane conversion (initially higher than 55% and averaging 45.2% over a period of 2 h) and propene selectivity (higher than 99%) were obtained experimentally with PtSn-Mg(3Zn)AlO at 550 °C. The results demonstrated that Pt provided the active sites and that Zn was a promoter. The HRTEM and CO pulse chemisorption results indicated that the addition of Zn to the PtSn-MgAlO catalyst can stabilize the dispersion of metal particles and thus inhibit the sintering of Pt particles. Furthermore, the activities of the used catalysts were almost recovered through reaction-regeneration cycles with the burning-off of coke during five cycles.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Ruihan Li,Feng Hu,Ran Wu,Jianyi Xu,Jin Xu,Zhonghui Hou,Min Zhou,Junyu Bai,Yanghuan Zhang
In the present study, the synthesis of NdMg 12 + x wt%Ni( x = 0, 5, 10, 15) alloy was effectively accomplished through the technique of ball milling , and the profound impact of Ni on the microstructural attributes, as well as the hydrogen absorption and desorption characteristics of NdMg 12 alloy, was meticulously examined. The microstructural analysis reveals that Ni can notably facilitate the development of nanocrystalline and amorphous structural configurations. Subsequent investigations uncovered that a portion of Ni was transformed into the Mg 2 Ni phase on the surface of the NdMg 12 alloy, thereby increasing the number of hydrogen absorption active sites and subsequently enhancing the hydrogen absorption and desorption capabilities of the NdMg 12 +Ni alloy. A thermodynamic analysis reveals that the incorporation of Ni exerts a substantial elevating effect on the hydrogen desorption plateau pressure of NdMg 12 +Ni alloy. As the Ni content escalates from 0 wt% to 5 wt%, the enthalpy of the hydrogen desorption process plummets significantly, from 89.1888 kJ/mol H 2 to 80.2806 kJ/mol H 2 . Concurrently, the addition of Ni markedly diminishes the hysteresis coefficient during hydrogen absorption and desorption, thereby enhancing the overall hydrogen absorption and desorption efficiency of NdMg 12 +Ni alloy. Moreover, the inclusion of Ni not only expedites the hydrogen absorption rate within the NdMg 12 +Ni alloy but also substantially diminishes the activation energy for hydrogen desorption, effectively lowering the minimal hydrogen desorption temperature from 261℃ to 199℃. Notably, the NdMg 12 + 10 wt%Ni alloy exhibited the lowest activation energy (Ea = 114.4995 kJ/mol) and demonstrated superior hydrogen desorption kinetics.
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高影响因子
CERAMICS INTERNATIONAL
·
2021
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IF 4.527
Shiyao Shen,Ying Tang,Jie Li,Weishuang Fang,LaiYuan Ao,Xiangguang Zhao,Liang Fang
Substitution of Ga 3+ by [Zn 0.5 Ti 0.5 ] 3+ in MgGa 2 O 4 improved the comprehensive properties of the resultant spinel. A continuous solid solution with a spinel structure was formed in Mg(Zn 0.5 Ti 0.5 ) 2 x Ga (2−2 x ) O 4 (0 ≤ x ≤ 1); here, Zn 2+ occupied the tetrahedral 8 a site while Ti 4+ occupied the octahedral 16 d site, resulting in a decrease in the degree of inversion λ from 0.86 to 0. The optimal sintering temperature decreased from 1460 °C to 1220 °C, and the dielectric constant ( ε r ) increased from 8.8 to 14.9; these changes could be ascribed to the greater polarizability of [Zn 0.5 Ti 0.5 ] 3+ relative to that of Ga 3+ . The temperature coefficient of resonant frequency ( τ f ) of the material remarkably increased from −64.1 ppm/°C to −16.8 ppm/°C, which may be attributed to the increase in dielectric polarizability/molecular volume, bond energy, and bond valence in B-sites. The high-quality factor ( Q × f ) slightly decreased from 89,253 GHz to 73,432 GHz with decreasing λ and packing fraction. Optimal microwave dielectric properties were obtained from the sample with x = 1 and sample sintered at 1220 °C; in this case, ε r = 14.9, Q × f = 73,432 GHz, and τ f = −16.8 ppm/°C.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Ruixin Yan,Xiuping Feng,Long Kong,Qun Wan,Weilin Zheng,Takeshi Hagio,Ryoichi Ichino,Xinde Cao,Liang Li
Hexavalent Chromium (Cr(VI)) in water is a public health concern and has been a challenging research subject in environmental field for many years. Herein, a novel composite material consisting of amorphous iron sulfides supported on hydrotalcites (FeS/HTs) was synthesized by “calcination-reconstruction-calcination” process, which enables homogeneous distribution of iron and sulfur on the surface of hydrotalcites (HT). The composite (mass ratio of FeS/HT was 1/2) could effectively remove over 98% of Cr(VI) within 10 min. A pseudo-second-order kinetic model and a Langmuir isotherm model were well fitted the sorption data with a maximum removal capacity of 206.2 mg/g. The superior adsorption capacity of FeS/HTs could be attributed to the combination of the advantages of abundant adsorption sites on HT and powerful reduction properties of iron sulfides. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis suggested the adsorbed Cr(VI) on the surface and interlayer of FeS/HTs had been reduced to Cr(III) by reductant iron and sulfur. This study demonstrated that FeS/HTs has potential application prospects in Cr(VI) removal.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2019
·Vol. 166
·期 4
·A658
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IF 3.12
Zhenya Wang,Limei Sun,Wenyun Yang,Jinbo Yang,Kai Sun,Dongfeng Chen,Xiangfeng Liu
Li4Ti5O12 (LTO) has attracted great interest as an anode material due to the "zero strain" during Li+ insertion and extraction. But the intrinsic ionic diffusion coefficient and electronic conductivity are very poor. Herein, a strategy of Mg2+ and Zr4+ co-doping has been proposed to modulate the crystal structure and improve the electrochemical performances. More importantly, the synergic roles of Mg/Zr co-doping has been unveiled based on the analysis of X-ray diffraction, Neutron powder diffraction, X-ray photoelectron spectroscopy, and electrochemical measurements. Firstly, Mg-Zr co-doping expands the lattice parameter, cell unit volume and even Li-O bond length, which reduces Li+ migration barrier and benefits to Li+ insertion/extraction. Secondly, Ti-O shrinkage induced by Mg-Zr co-doping enhances the structure stability and subsequently the cycle performance. Thirdly, Mg-Zr co-doping promotes more Ti4+/Ti3+ which facilitates electron conductivity. Moreover, Mg-Zr co-doping also decreases the polarization and charge transfer impedance. Li3.8Mg0.2Ti4.9Zr0.1O12 delivers a discharge capacity of 180.5, 150.7, 110.4 and 78.9 mAh/g at 0.2C, 1C, 5C and 10C, respectively. Moreover, the capacity retention is greatly increased from 57.9% of LTO to 98.59% at 10C after 500 cycles.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2024
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IF 2.7
Shengdong Liu,Da Li,Tianhua Xiao,Zhufeng Yuan,Huanhuan Zhang,Yonggang Min
Polyetheretherketone (PEEK) emerges as a highly promising biopolymer due to its mechanical properties and elastic modulus akin to those of human cortical bone. Despite these advantages, the clinical utilization of PEEK is often hindered by its limited bioactivity and suboptimal capability for bone integration. Herein, we introduce a facile and expeditious method for enhancing the osseointegration efficacy of PEEK substrates by depositing polydopamine (PDA) chelated with magnesium ions at varying concentrations (0.02, 0.1, and 0.5 M) as a surface coating (PDA-Mg). This PDA-Mg-modified PEEK surface exhibits distinctive properties, including antibacterial properties (antibacterial rate of 93.267%), improved vascular regeneration, and osteogenic promotion (ALP activity increased by 239.5%). Moreover, the Mg 2+ ions are released in a regulated way, and the impact of Mg 2+ concentration on the aforementioned properties has been thoroughly examined. Our study demonstrates that PDA-Mg-modified PEEK offers a highly promising prospect for clinical applications. Specifically, these implants stand out as exceptional candidates for bone graft materials, with the potential to significantly improve patient outcomes and accelerate recovery processes.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
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IF 6.3
Chun Sun,Jiazhi Cui,Yiwei Zhao,Zhihui Deng,Yelin Ding,Kai Lian,Junhuan Zhao,Zhongjie Zhai,Jiachen Han,Zhengtong Wang,Xiaohui Liu,Wengang Bi
Environmentally friendly metal halides with reversible transformation of structure and luminescence properties have become a focal point of interest in the areas of anti-counterfeiting and sensors. Herein, Zn 2 + -doped DMAMnBr 3 and Mg 2+ -doped DMA 2 MnBr 4 were successfully synthesized using the evaporation-crystallization method. After doping Zn 2+ in DMAMnBr 3 , the photoluminescence quantum yield (PLQY) is enhanced from 18 % to 40 %. For DMAMnBr 3 , the introduction of Zn 2+ ions also accelerates the color-changing rate upon water absorption due to the tendency of Zn 2+ to form tetrahedral structures. Besides, the DMAMn 0.8 Zn 0.2 Br 3 exhibits excellent sensitivity. Hence, a temperature detection software is developed, which is capable of monitoring temperatures in the range of 323–403 K. For DMA 2 MnBr 4 , the incorporation of Mg 2+ ions not only leads to the enhancement of PLQY but also reduction of melting temperature. The theoretical calculation indicates that the decrease in the melting point is caused by the reduction in lattice energy. Utilizing this characteristic, we produced rewritable paper with excellent reusability. Finally, anti-counterfeiting labels were created using both DMAMn 0.8 Zn 0.2 Br 3 and DMA 2 Mn 0.95 Mg 0.05 Br 4 . The concealed information can be deciphered through straightforward heating. These results hold promise for extending the potential applications of manganese-based perovskite materials.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Yuanxiang Zhang,Tianlong Huang,Maosheng Cui,Xiaoxiao Wang,Zhen Mu,Mengting Yuan,Zilu Wei,Meng Yuan,Yanwei Sui,Jiqiu Qi,Yang Zhang,Xiaolan Xue
Although rechargeable magnesium batteries (RMBs) represent a promising post‑lithium energy storage technology, the formation of a non-conductive Mg 2+ passivation layer on Mg anodes remains a significant challenge. Here, we develop a novel all-inorganic electrolyte with low overpotential for Mg plating/stripping by introducing electrochemical active CuCl into a MgCl 2 /THF solution (MgCl 2 -CuCl/THF). During cycling, a multi-functional interface layer composed of Cu and Cu x Mg y Cl z is formed in situ on the Mg anode surface, which not only promotes MgCl 2 salt dissociation but also offer rapid-electron transport pathways. Moreover, the Cu + with reversible redox nature in Cu x Mg y Cl z can accommodate and release Mg 2+ ions, thereby facilitating rapid and homogenous Mg 2+ deposition. Consequently, the optimized MgCl 2 -CuCl/THF electrolyte enables Mg//Mg symmetric cells to cycle stably for over 1300 h at 0.5 mA cm −2 , with an overpotential as low as 0.15 V (vs. Mg 2+ /Mg). Furthermore, excellent Mg electro-plating/stripping properties have also been demonstrated in Mg//Mo, Mg//Cu, and Mg//SS asymmetric cells, achieving nearly 100 % Coulombic efficiency and stable cycling for over 138, 138, and 55 days, respectively. This work provides a promising strategy for the design of high-performance electrolyte systems for advanced RMBs.
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Advanced Healthcare Materials
·
2025
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IF 9.6
Haibo Liu,Zhongyi Sun,Mengting Yin,Jing Ru,Xiaohao Liu,Ziyan Chen,Yating Liu,Wang Sun,Longpo Zheng,Xinyu Zhao,Feng Chen
Diabetic oral ulcers pose a significant challenge in healing due to persistent inflammation. Despite local therapeutic interventions remaining the primary mode of treatment, the dynamic nature of the oral cavity, characterized by continuous muscular activity and salivary secretion, poses barriers to sustained drug retention and thereby limits therapeutic efficacy. To address this issue, an approach has been devised that aims to facilitate transdermal delivery of bioactive components to promote the healing of diabetic oral ulcers. A multifunctional soluble microneedle (MN) patch is prepared using γ-polyglutamic acid (γ-PGA), which is loaded with quercetin (Qu)-modified Mg−Zn layered hydroxide salt (LHS) nanosheets (LHSQ) with anti-inflammatory, antimicrobial and pro-angiogenic bioactivities to combat the diabetic oral ulcers. These findings demonstrate that the LHSQ-loaded MN (LHSQ-MN) patches are capable of effectively penetrating the oral mucosa. In a rat model of diabetic oral ulcers, the application of LHSQ-MN patches is found to facilitate the establishment of regeneration sites, regulate the inflammatory microenvironment of damaged tissues, exhibit potent antibacterial effects, expedite the reconstitution of the mucosal epithelium, and accelerate ulcer healing through the promotion of angiogenesis. These outcomes highlight the potential of LHSQ-MN patches as a promising therapeutic strategy for the management of oral ulcers in diabetic patients.
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