CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Chao Wei,Haifeng Zhang,Ji Tan,Kui Xue,Zhiyu Hou,Rongxiang Ding,Xianming Zhang,Xuanyong Liu
NiTi alloys are widely used in the fabrication of biomedical implants, and it is essential to endow them with selective antibacterial properties to avoid implant-associated infection. In this study, nickel nitride (Ni 3 N), as a promising new inorganic nitric oxide (NO) donor, was in situ constructed on the surface of NiTi alloys through a straightforward two-step plasma immersion ion implantation (PIII) strategy. Nickel sites were first exposed by physical bombardment with argon or metal plasma, followed by reaction with nitrogen plasma to form Ni 3 N. Ni 3 N can disrupt the transmembrane proton electrochemical gradient by capturing protons to produce ammonia species (NH x ), resulting in the accumulation of reactive oxygen species (ROS) as a result of bacterial metabolic disruption. On the other hand, the generated NH x can further react with ROS to produce NO and reactive nitrogen species (RNS). As a result, the Ni 3 N films exhibited more than 99 % antibacterial efficiency against both gram-negative and gram-positive bacteria. They also demonstrated effective antibacterial properties in a rat subcutaneous implant model. In addition, the modified NiTi alloys exhibit good corrosion resistance and cytocompatibility. This study provides a green, safe, and inexpensive method for constructing metal nitride films on implant surfaces and offers new ideas for the clinical design and fabrication of novel antibacterial implants.
研究领域:
生物医学工程
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材料科学
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微生物学
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DOI
高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Taozhu Li,Yu Liang
The application of NiTi alloys in the electrooxidation of urea is primarily based on their unique electrochemical activity and stable chemical properties. It has been found that during electrochemical cyclic voltammetry treatment, a Ni(OH)2 layer with high catalytic activity can be formed on the surface of NiTi alloys, which significantly enhances the efficiency of urea electrooxidation. Electrochemical studies reveal that NiTi@Ni(OH)2 exhibits voltage-dependent selectivity between urea oxidation and water oxidation. When the applied potential is less than 1.47 V, the electrode undergoes urea oxidation; in contrast, when the applied potential exceeds 1.54 V, the electrode reaction switches to water oxidation. That is, the selectivity between urea oxidation and water oxidation can be achieved by adjusting the applied potential, which provides a new approach for the selectivity control of electrochemical reactions.
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DOI
PubMed
高影响因子
MATERIALS & DESIGN
·
2022
·
IF 9.417
Jia Yang,Wanqi Zhao,Panpan Lin,Qiuguang Zhang,Xinfei Zhang,Weihang Liu,Tiesong Lin,He Peng,Yanli Zhuang
We designed a composite filler beginning with becoming light elements to be the main diffusing elements and (ii) controlling the diffusion of the light elements. It was achieved by establishing chemical potential and supercooling gradients and shortening the diffusion distance. As a result, a transient liquid phase bonding (TLP) composite joint with hedgehog-like reinforcements and a ductile matrix was obtained. The room-temperature (RT) shear strength of the joint produced at 460 °C for 30 min was up to 84 MPa, and it had a strength of 30 MPa at 600 °C. The hedgehog-like” reinforcements with finer or longer whiskers can provide a better load transfer effect. The progressive phase formation around NiTi was induced by the large supercooled liquid, wherein either the fastest-solidified region or the deepest-supercooled liquid served as a barrier for metallic atoms. Consequently, the lower supercooling and higher Si chemical potential in the farther region enable Si to directionally diffused towards the NiTi. This study offered a novel filler feasible for most ceramic/metal systems with the goals of low-temperature joining and high-temperature using and controllable product distribution; and this idea can be extended to develop other systems.
研究领域:
材料科学
·
焊接工程
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DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 47
·24767-24774
·
IF 8.867
Chenlong Dong,Xiangye Liu,Xin Wang,Xiaotao Yuan,Ziwan Xu,Wujie Dong,Muhammad Sohial Riaz,Guobao Li,Fuqiang Huang
Developing economical and stable bifunctional electrocatalysts for overall water splitting is of enormous importance for sustainable energy systems. Here, Ni/NiTiO3 with a villiform structure assembled by nanosheets is presented as an efficient bifunctional electrocatalyst. The Ni/NiTiO3 with a molar ratio of 15 : 1 (Ni : Ti) manifests remarkable catalytic performance for both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) in alkaline solutions, with onset overpotentials of 270 mV for the OER and ∼50 mV for the HER. Large amounts of Ni nanoparticles inset in the NiTiO3 nanosheets possess a high specific surface of 28.4 m2 g−1 which is far greater than that of bare Ni (7.7 m2 g−1). The results of long-term OER operation confirm that the introduction of Ti4+ is favorable for enhanced stability. When the catalyst is employed as both the cathode and anode for overall water splitting, it displays an onset potential of 1.55 V in 1 M KOH solution which can rival that of the integrated performance of Pt/C and RuO2. Hence, our Ni/NiTiO3 electrocatalysts have enormous potential for realistic large-scale water splitting.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Wang Ruonan,Zhang Mingjia,Liu Jingjing,Wu Xu,Zhang Shule,Zhong Qin,Yao Jianfeng
Scaling up methanol yields by artificial photosynthesis at a modest cost remains thermodynamically challenge. Designing concerted reaction sites to control intermediate evolution and stimulate proton-coupled electron transfer (PCET) is necessary. Here we show a nickel-titanium-based catalyst that achieves near-millimolar hourly methanol yields with 99.79% selectivity and a solar-to-chemical conversion efficiency of 2.23%. This catalyst is synthesized through one-step etching of NiTi-layered double hydroxide, which generates abundant unsaturated sites, along with the in-situ formation of amorphous TiO 2 . Revealed by in-situ characterizations, these defect-rich units effectively suppress the formation of undesirable carbonate while promoting the favorable *COOH intermediate. Furthermore, theoretical simulations confirm this *COOH boost facilitates the production of *CO and accelerates the PCET steps. This work significantly advances efficient methanol production by artificial photosynthesis and offers fundamental insights into controlling reaction pathways for renewable fuel synthesis.
研究领域:
催化
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材料科学
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环境科学
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能量转换
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纳米技术
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化学工程
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产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2018
·
IF 2.687
Long Meng,Yang Li,Kai Pan,Ye Zhu,Wei Wei,Xiaojie Li,Xiaoya Liu
Photo-crosslinking copolymer Poly (2-Hydroxyethyl methacrylate- co -2-(Dimethylamino) ethyl methacrylate- co -7-hydroxy-4-methylcoumarin methacrylate) (PHDC)) was first synthesized by free radical polymerization of 7-hydroxy-4-methylcoumarin methacrylate (CA), 2-Hydroxyethyl methacrylate (HEMA) and 2-(Dimethylamino)ethyl methacrylate (DMA). Then, the copolymers were self-assembled into colloidal particles and immobilized on the NiTi alloy by a simple one-step electrophoretic deposition. After irradiation, a photo-crosslinked coating was obtained. The structure and morphology were characterized by OCA and SEM. The copolymer coatings could significantly decrease the release of nickel ions into the environment and reduce cytotoxicity inducing by nickel ions according to immersion experiment. Meanwhile, the coatings have good cytocompatibility. This work provides a simpler polymer coating method to inhibit the release of toxic ions by inducing ion adsorption with certain molecular structures, which have potential for biomedical applications such as artificial bone and bone fixation device.
研究领域:
材料科学
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生物医学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Chao Wei,Ji Tan,Shun Xing,Hongqin Zhu,Naijian Ge,Haifeng Zhang,Xuanyong Liu
Interventional therapy represents the primary treatment modality for cardiovascular disease associated with vascular obstruction. However, conventional stents are susceptible to thrombosis and infection, leading to serious threats to patient health and, in some cases, mortality. In this study, a Ta/Ta 2 O 5 /Ni 3 N film was prepared in situ on the nitinol (Ni-Ti) stent using a sequential plasma immersion ion implantation method. As tantalum has a negative charge under physiological conditions and nickel nitride adsorbs protons in solution, the introduction of tantalum and nickel nitride is expected to allow the surface charge of the material to be tailor-made. The film displays excellent hemocompatibility and reduced platelet adhesion, based on the combined effect of “mosaic-like” charge distribution of the film and the high dispersion/polarity component ratio in the surface tension. Ammonia species is an important physiological signaling molecule, which could be produced by the affinity of nitrogen in nickel nitride with protons in solution. In turn, ammonia species modulates the cellular NRF2/HO-1 signaling pathway, thereby enhancing cell viability. Furthermore, ammonia species increases intracellular eNOS gene expression, which enhances cell migration and promotes early endothelialization. Additionally, the depletion of protons by nickel nitride can disrupt bacterial metabolism, which results in the production of reactive oxygen species (ROS) and nitric oxide (NO) within the bacteria, achieving a killing efficacy of over 99.9% for both gram-negative Escherichia coli and gram-positive Staphylococcus aureus . It is anticipated that this straightforward, multifaceted inorganic bioactive film approach will prove an invaluable solution for enhancing the reliability of stents and reducing the burden on patients.
研究领域:
生物材料学
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心血管医学
·
生物化学
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产品关联
DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2019
·Vol. 50
·期 2
·940-949
·
IF 1.952
Ma Xue,Xie Hongwei,Qu Jiakang,Song Qiushi,Ning Zhiqiang,Zhao Haijia,Yin Huayi
Molten salts can provide a high-temperature and oxygen-water-free environment, and the electrochemical polarization is able to reduce the oxide scale on the surface of Ti and Ni particles in molten salts and, thereby, enhance the sintering and accelerating atom diffusion between Ti and Ni. Thus, an electro-assisted powder metallurgical (EPM) approach was developed to prepare porous Ti and NiTi from metal powders in molten salts, where the porous pellet cathode made of the mixture of Ni and Ti powders is electrochemically polarized to facilitate the generation of the porous Ti and NiTi at a temperature lower than 1000 °C. The electrolytic product obtained under a cell voltage of 3 V for 12 hours is nearly pure NiTi with a tiny amount of undesired Ni 3 Ti and NiTi 2 phases. Overall, the EPM route could be a straightforward and general way to prepare porous Ti and Ti-alloys for implants and other applications.
研究领域:
材料科学
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冶金学
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电化学
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生物医学工程
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Chi Zhang,Junwen Zhang,Lina Che,Xusheng Wang,Li Shi
Photothermal technology offers distinct advantages for catalytic CO 2 methanation. Herein, we synthesized a series of Ni-based catalysts (denoted as TiO 2-x /Ni-X) through controlled calcination of NiTi-layered double hydroxides (LDHs) precursors at 400–700°C. In a continuous-flow system under xenon lamp irradiation (3.2 W/cm²), the TiO 2-x /Ni-X catalysts exhibited a reduction temperature dependent CH 4 production rate. During 40-hour stability testing, the optimized TiO 2-x /Ni-550 catalyst achieved a sustained CH 4 production rate of 180 mmol g cat −1 h −1 with a remarkable near-unity selectivity (>99 %), and the light irradiation substantially enhanced the CH 4 yield compared to bare thermal catalysis. Comprehensive structural characterization and mechanistic studies revealed competing roles governing catalytic activity, with TiO 2-x /Ni-550 demonstrating an optimal balance for CH 4 generation kinetics.
研究领域:
催化化学
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环境科学
·
材料科学
·
能源化学
·
物理化学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2026
·
IF 5.9
Demin Li,Yachen Hou,Yang Lu,Pengchong Du,Ge Zhang,Yan Lv,Ke Hu,Rilige Su,Bolin Jiao,Yangyang Wu,Yujia Wang,Jinying Zhang,Junnan Tang
ZFP36 was selected as an MI-associated candidate for donor-cell engineering. • ZFP36 OE -EV attenuated RSL3-induced ferroptosis-related endothelial injury. • ZFP36 OE -EV showed beneficial biological activity in a mouse MI model. • EV-functionalized NiTi interfaces improved vascular healing after implantation. Myocardial infarction (MI) is associated with persistent myocardial injury and vascular dysfunction despite advances in reperfusion therapy. Delayed endothelial recovery, inflammation, and vascular remodeling remain important challenges during post-MI repair and vascular intervention. Here, we investigated whether extracellular vesicles (EVs) derived from ZFP36-overexpressing AC16 cells could attenuate ferroptosis-related endothelial injury, improve cardiac function after MI, and be integrated into a bioactive NiTi surface for vascular repair. Bioinformatic screening identified ZFP36 as an MI-associated candidate linked to ferroptosis-related processes; increased expression was subsequently observed in the mouse MI model. ZFP36-overexpressing AC16 cells were generated, and the released EVs were designated ZFP36 OE -EV. In RSL3-treated HUVECs, ZFP36 OE -EV improved cell viability, reduced oxidative stress, preserved mitochondrial membrane potential, and partially restored ferroptosis-related molecular changes. In a mouse MI model, intramyocardial delivery of ZFP36 OE -EV improved cardiac function and reduced myocardial fibrosis. To explore the use of the same engineered EV preparation for vascular interface functionalization, ZFP36 OE -EV was immobilized onto a polydopamine/hyaluronic acid (PDA/HA)-modified NiTi surface to generate the NPH@Z-EV coating. The coating supported EV loading and gradual particle release in vitro. Under direct cell–material contact conditions, the NPH@Z-EV coating exhibited endothelial protective activity under ferroptosis-related stress. In a rat femoral artery injury model, the NPH@Z-EV coating supported vascular repair, with improved endothelial recovery, reduced local inflammatory activation, attenuated lipid peroxidation-associated vascular injury, and a VSMC marker pattern consistent with reduced phenotypic switching. These findings support further evaluation of engineered EVs as a strategy for functionalizing NiTi vascular interfaces to improve vascular healing after implantation.
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 3
·1551-1561
·
IF 3.069
Long Meng,Yunan Wu,Kai Pan,Ye Zhu,Xiaojie Li,Wei Wei,Xiaoya Liu
Nickel-titanium alloy (NiTi alloy) has recently received an increasing amount of attention. However, the release of toxic nickel ions and the threat of implant infections has limited its clinical applications. Thus, we report a promising copolymer coating with excellent nickel ion (Ni2+) inhibition release, cytocompatibility, and antimicrobial properties to solve these safety issues involving NiTi alloy implantation. Quaternized copolymers poly (7-hydroxy-4-methylcoumarin methacrylate-co-2-hydroxyethyl methacrylate-co-2-(dimethylamino)ethyl methacrylate) (PCHD-Q) with many hydroxyl and tertiary amine groups were first synthesized, self-assembled into nanoparticles, and then deposited on NiTi substrate through electrodeposition. After UV irradiation, scanning electron microscopy (SEM) images revealed that homogeneous, continuous, and dense coatings were obtained. The coatings showed good improvement of protective behavior for the NiTi alloy in an in vitro environment and could significantly decrease the release of Ni2+ through physical barriers and physical adsorption, which could obviously reduce cytotoxicity inducing by Ni2+. According to in vitro cell viability and antibacterial tests, the quaternized coating materials not only provided a relatively stable biointerface for cell adhesion, spreading and growth, but also obtained excellent antimicrobial activity for the bare NiTi alloy against S. aureus and E. coli. These results suggested that our coatings materials have the potential for improving the safety and success rate of NiTi-based implantations.
研究领域:
材料科学
·
生物医学工程
·
表面涂层技术
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产品关联
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2023
·
IF 5
Wennan Su,Chi Zhang,Xiufang Cui,Guo Jin,Changhao Liu,Erbao Liu,Jian Li,Haonan Zhao,Boyu Cao,Haoliang Tian
YF 3 modification NiTi-Si coatings were prepared on Ti-6Al-4 V substrate by laser cladding. On this foundation, heat and cryogenic treatments were conducted respectively to explore the effect of after-treatment procedures. The consequence of post-treatment methods on the phase constituent, microstructure, mechanical property, and phase transition characteristics of post-treatment coatings was studied. The phase constituent of the three coatings was roughly the same, composed of NiTi and NiTi 2 . The results show that heat treatment led to the coarsening of NiTi phase grain size and increased Si content in the NiTi 2 phase. In addition, due to the rapid cooling rate provided by cryogenic treatment, the spinodal decomposition of the Si element occurred in the NiTi 2 phase. Furthermore, the post-treatments also affected the phase transformation characteristics of the coatings. As the temperature of martensitic transformation is sensitive to the content of Ni element in the NiTi phase, the M s and M f points of the heat treatment coating were slightly higher. In contrast to the heat treatment, the M s and M f points of the cryogenic treatment coating decreased. The microhardness of the three coatings is as follows: cryogenic treatment > original coatings > heat treatment. The cryogenic treatment coating has the highest microhardness due to grain refinement and spinodal decomposition. In addition, the cryogenic treatment coating showed the best wear morphology.
研究领域:
材料科学
·
表面工程
·
金属涂层
·
相变
·
激光加工
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DOI
高影响因子
危险品化学品经营许可证（带存储）