Nano Research
·
2018
·Vol. 11
·期 9
·4587-4598
·
IF 7.994
Zhang Jingtong,Chen Yalan,Liu Ming,Du Kun,Zhou Yan,Li Yanpeng,Wang Zhaojie,Zhang Jun
Few-layered MoSe 2 nanosheets with mixed 1T/2H phase were successfully arrayed on a Ti substrate (forming 1T@2H-MoSe 2 /Ti) through a facile one-step solvothermal process. After testing different synthesis conditions, it was found that the optimal process involves a temperature of 200 °C and a reaction time of 12 h. Structural characterizations reveal that the morphology of 1T@2H-MoSe 2 consists of edge-terminated nanosheets with one to five layers, composed of a mixed 1T/2H phase dominated by the 1T one. The 1T@2H-MoSe 2 /Ti electrode shows excellent HER catalytic activity, with a small onset potential (−120 mV vs. reversible hydrogen electrode, RHE) and an electrode potential of only −133 mV (vs. RHE) to achieve a current density of 20 mA·cm −2 . This excellent electrocatalytic activity is due to the synergistic effects of 1T metallic phase, few-layered nanosheet morphology, and direct growth of 1T@2H-MoSe 2 on the Ti substrate. In addition, the 1T@2H-MoSe 2 /Ti electrode shows excellent stability towards long-term electrolysis. This is due to the long-term stability of the valence states of Mo and Se, as shown by post-electrolysis X-ray photoelectron spectroscopy analysis.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 16
·15097-15104
·
IF 2.195
Mi Yijin,Zhao Hui,Jia Dongling,Miao Yuqing
Bosk-like Co–Sn–Se monocrystals are deposited on porous Ti plate through a hydrothermal method. The prepared Co–Sn–Se was characterized with morphology, composition and electrocatalytic properties. Electrochemical measurements revealed that the Ti/Co–Sn–Se electrodes exhibited great catalytic performance for hydrogen evolution reaction with the low onset overpotential of − 50 mV, the small Tafel slope of 83 mV/dec and good stability over an extended period of 34,000 s. The high electrocatalytic activity of bosk-like Co–Sn–Se monocrystals, the fast electron transfer between electrodes and catalysts, and the high conductivity of Ti contribute to their acceptable electrocatalytic performance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2018
·
IF 3.235
Yingjie Gu,Wenqiang Zheng,Yuyu Bu
In this study, a nanoflower structured WO 3 thin film has been prepared on an etched titanium substrate using a WO 3 seeds-assisted hydrothermal reaction method. The WO 3 nanoflower-like structure appeared when the growth time arrived at 4.75 h. Subsequently, this film went into a rapid growth stage. The nanoflower (NF) structured WO 3 thin film with 8 h of hydrothermal reaction possessed the best photoelectrochemical performance. The photoinduced current density was 2.0 mA·cm −2 at a bias potential of 1.23 V (vs. Ag/AgCl) under the illumination by a simulated sunlight (100 mW/cm 2 ) with a filter air mass (AM) 1.5 G. The improvement of the photoelectrochemical performance of the nanoflower structured WO 3 can be attributed to three aspects. Firstly, the light absorption capacity could be increased by the nanoflower structure. Secondly, the reactive sites could be enhanced due to the increased specific surface area of the nanoflower structured WO 3 . Finally, a direct transfer channel for the photogenerated electrons could be formed by the definite 2-dimentional WO 3 nanoflakes linked with the Ti substrate.
研究领域:
材料科学
·
光电化学
✓ 已验证
DOI
高影响因子
INORGANICA CHIMICA ACTA
·
2021
·
IF 2.545
Ziqi Zhang,Yan Zhang,Kaida Yao,Weimin Huang,Tiejun Wang
Traditional bone implants are prone to postoperative infection due to their poor corrosion and antimicrobial resistance. Thus in this work, based on the original titanium base, we modified and synthesized a novel amorphous spherical metal-organic framework analogue nanoparticles with neodymium ions doped into them. This new rare earth element doped metal-organic framework and hydroxyapatite were co-deposited on titanium dioxide nanotube arrays by electrochemical method which can save a lot of time and energy compared to the traditional coating process. Most importantly, new coating can not only improve the corrosion resistance of the coating by increasing the resistance of the titanium sheet in SBF but also improve the antibacterial ability of Ti base without damaging the good biocompatibility of the titanium.
研究领域:
材料科学
·
生物医学工程
·
表面改性技术
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2018
·Vol. 6
·期 1
·016424
·
IF 1.151
Pengfei Li,Hui Liu,Hongyue Chen,Xianhua Cheng
In order to improve the tribological properties of titanium substrate, self-assembly technique was used to prepare a graphene-silane coating: RGO-APTES coating on titanium substrate. The γ-aminopropyltriethoxysilane (APTES) was used to prepare a self-assembled APTES coating as a function of adhesive interlayer, aiming to improve the assembly efficient for graphene coating. The influence of that interlayer on the assembly and tribological properties of graphene coatings on titanium substrate was investigated. Morphology, thickness, chemical characteristic and tribological tests were utilized to investigate the assembly process and tribological properties of coatings. The results show that: (1) the pH values of APTES aqueous solution plays an important role in the molecule orientation of the APTES interlayer, and thus the properties of graphene coating is influenced. When pH is approximately 8.5, the molecule orientation of the interlayer is consistent, so that it has improved adsorption effect on graphene sheets and the graphene coating is uniformly distributed and well-covered; (2) the thickness influences the tribological properties of graphene-APTES coating -- single layered APTES interlayer provides a stronger interlayer strength. The obtained RGO-APTES2 samples have novel friction reducing and wear resisting properties, and can be applied on the surface of titanium substrate as lubricating coating.
研究领域:
材料科学
·
表面工程
·
纳米技术
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 24
·10608-10617
·
IF 3.591
Huazhen Cao,Chenxi Jia,Huibin Zhang,Guangya Hou,Yiping Tang,Guoqu Zheng
MoS2/TiO2 composite photocatalysts with visible-light activity were in situ fabricated on titanium substrates via a simple two-step hydrothermal synthesis method, using titanium foil as the Ti source. The structure, morphology, composition and optical properties of the as-prepared photocatalysts were characterized by XRD, SEM, TEM, XPS, UV-vis and PL analyses, respectively. TiO2 exists in the form of nanofibers (NFs), with their length ranging from about 40 nm to 150 nm and a diameter of about 10 nm. MoS2 microspheres are homogeneously dispersed on the surface of TiO2 NFs, forming a MoS2/TiO2 composite. The photocatalytic oxidation rate of NO2− under simulated solar irradiation can reach 62% by the MoS2/TiO2 composite synthesized in a hydrothermal system with a C2H5NS/Na2MoO4 molar ratio of 1 : 0.6 under 200 °C for 24 h, which is much higher than that by pristine TiO2 NFs, P25 and pure MoS2. The photocatalytic oxidation process of NO2− obeys the Langmuir–Hinshelwood kinetic model (pseudo-first order reaction), and the reaction rate constant (k) of the as-prepared composite is about 0.19194 h−1. The presence of MoS2 significantly enhances the visible light absorption of the catalyst, which is conducive to the generation of electrons and holes, thus guaranteeing good photoactivity of the catalyst. The band gap of the composite is about 2.2 eV, indicating the enhanced absorption of visible light. By this simple and low-consumption method, the composite is firmly combined with the titanium substrate, which is convenient for recycling and environmentally friendly implementation.
研究领域:
材料科学
·
环境科学
·
光催化技术
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2016
·Vol. 163
·期 14
·H1144
·
IF 3.014
Li Xu,Yuefei Lian
A novel SnO2-Sb nanorods anode with Ti sheet as substrate (Ti/SnO2-Sb-NRs) was prepared through hydrothermal process. The Scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), X-ray diffraction (XRD) and the contact angle meter were used to characterize the physicochemical properties of the anodes. Additionally, the electrochemical properties and the stability were further studied by the electrochemical impedance spectroscopy (EIS), linear sweep voltammetry (LSV), cyclic voltammetry (CV), chronoamperometry (CA) measurements and accelerated life test, respectively. These results indicated that Ti/SnO2-Sb-NRs anode possessed SnO2-Sb-NRs which were about 70 nm in width, as well as a better wettability, a lower charge transfer resistance, a larger current at constant potential and a longer lifetime than the conventional Ti/SnO2-Sb anode prepared by pulse electro-deposition. And the existence of direct oxidation on Ti/SnO2-Sb-NRs anode was confirmed. Electrochemical degradation of Acid Red 73 (AR 73) was investigated to study the electro-catalytic oxidation performance of the anodes. And the results showed that SnO2-Sb-NRs remarkably improved the degradation of AR 73, the chemical oxygen demand (COD) removal efficiency and the adsorption capacity on Ti/SnO2-Sb-NRs anode, which was probably due to the synergetic effects of SnO2-Sb-NRs.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Yong Huang,Min Hao,Xiaofeng Nian,Haixia Qiao,Xuejiao Zhang,Xiaoyun Zhang,Guiqin Song,Jiachi Guo,Xiaofeng Pang,Honglei Zhang
Bacterial infection are serious complications for biomedical implants in the orthopedic and dental fields, and the ideal implants should combine good antibacterial ability and bioactivity. In this paper, we have fabricated the strontium/copper substituted hydroxyapatite (SrCuHA) coating on the commercially pure titanium (CP-Ti) and studied their effect on antibacterial and in vitro cytocompatible properties. Cu was incorporated into HA in order to improve its antimicrobial properties. Sr was added as a second binary element to improve the biocompatibility. The structural and morphological characteristics of the SrCuHA coatings were investigated using various analytical techniques. The presence of Sr 2+ and Cu 2+ in solution led to reduced roughness of the coating and finer nucleus size formed. The results highlight that Sr 2+ and Cu 2+ were homogenously incorporated into HA lattice to form SrCuHA coatings. Inductively coupled plasma mass spectrometry (ICP-MS) was used for the leach out analysis of the samples. A low contact angle value revealed the hydrophilic nature. In vitro electrochemical corrosion studies indicated that the SrCuHA coating sustain in the stimulated body-fluid (SBF), exhibiting superior corrosion resistance with a lower corrosion penetration rate than the bare CP-Ti substrate. The SrCuHA coatings can kill Escherichia coli to a certain extent during the first few days, which might be due to the Cu substitution in the coating. An enhancement of in vitro osteoblast adhesion, proliferation, and alkaline phosphatase activity was observed, which could lead to the optimistic orthopedic and dental applications.
研究领域:
生物医学工程
·
材料科学
·
微生物学
✓ 已验证
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2023
·
IF 6.4
Wensheng Yang,Yue Gao,Quan Xie,Tinghong Gao,Yongchao Liang,Qian Chen,Zean Tian,Yunjun Ruan
The Ti substrate, with physicochemical stability and excellent electrical conductivity, is potential to fabricate all-solid-state batteries. However, the Titanium atoms at high-temperature synthesis makes it easy to react with active materials. Modifying the titanium surface with an inert protective layer while ensuring high electrical conductivity remains a significant challenge. Herein, a pencil was used to draw on the Ti substrate and subsequently sintering at a high temperature to obtain a graphite-coated Ti substrate (Ti-Graphite). The experimental results show that Ti-Graphite has a smoother surface and fewer defects in the graphite layer. Moreover, titanium carbide is formed at the interface of graphite and Ti substrate, which will enhance the physicochemical stability of the Ti-Graphite. To gain deep understanding of the evolution mechanism in the synthesis, molecular dynamics simulations were carried out to investigate it. The results exhibit that the voids at the C/Ti interface and stress in the model were significantly decreased after sintering and cooling treatment, proving that Ti-Graphite has a smoother surface, a more stable interface, and fewer defects at the atomic scale. Therefore, we provide a simple and facile strategy to obtain a Ti-graphite substrate with superior physicochemical stability, which reaveals excellent potential to synthesize high-performance all-solid-state batteries.
研究领域:
材料科学
·
电化学
·
计算模拟
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Yangyang Duan,You Wu,Ru Yan,Meng Lin,Shengjun Sun,Houyi Ma
A self-strengthening coating with silver nanoparticles (Ag NPs) doped chitosan (CHI) and sodium alginate (SA) polyelectrolytes was constructed on the surface of polydopamine (PDA) coated Ti substrate by a layer-by-layer assembly method. The PDA coating exhibited an excellent bond with Ti substrate, and also can uniformly deposit Ag NPs via a mild method without introducing any exogenous reductant. The CHI coating was assembled through a spin-coating method for controlling Ag + release. The SA was introduced to enhance the anticorrosion performance by forming calcium alginate (CA) in a corrosive medium. The corrosion protection was investigated with electrochemical impedance spectroscopy and polarization curves tests in fluorine-containing artificial saliva. During immersion, the charge-transfer resistance and the protection efficiency ( ŋ ) presented a continuous increase with the immersion time, demonstrating that this coating possessed a remarkable self-strengthening capability, and the compositions of the outermost film changed from SA to CA with the Ca 2+ cations of the corrosive medium as a crosslinker by SEM and EDS analysis . Furthermore, the ŋ remained up to 96.8% after immersion of 30 days, and then the coating also displayed a distinct inhibition zone on S. mutans . These results prove this coating possesses an excellent anticorrosion performance and antibacterial property .
研究领域:
材料科学
·
生物医学工程
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 16
·5932-5941
·
IF 8.262
Yu Zhou,Yong Liu,Wenxia Zhao,Fangyan Xie,Ruimei Xu,Baojun Li,Xiang Zhou,Hui Shen
A promising new concept is to apply additive/binder-free electrodes for lithium-ion batteries by directly growing active materials on current collectors, however, they still suffer from the low quality electronic contact and poor mechanical stability due to the lattice mismatch between active materials and substrates. Here we present the direct growth of vertically aligned MoS2 nanosheets on a Ti substrate through a self-supported TiO2 bonding interface route, thereby preferentially exposing the edges on the film surface. In this unique structure, MoS2 nanosheets are interconnected with each other and create a strong adhesion to the Ti substrate through the TiO2 bonding interface, which would allow electrons to easily transport throughout the whole electrode. Furthermore, their edge-terminated structure can provide more sites for Li-ion intercalation. By using this additive/binder-free electrode, it can deliver a discharge capacity as high as 1189 mA h g−1 at a current density of 1000 mA g−1 after 600 cycles. Importantly, our synthetic approach, based on this metal surface dissolution–crystallization produced bonding interface, can provide a general strategy for the direct growth of other metal sulphides such as NiS and CoS nanosheets on the Ti substrate with great promise for various applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2015
·
IF 3.091
Yapeng He,Weimin Huang,Rongling Chen,Wenli Zhang,Haibo Lin
The main aim of the present study was to explore the potential of boron-doped diamond (BDD) film electrode on porous titanium (Ti) substrate to promote the electrochemical oxidation of organic pollutants. Porous Ti endowed the Ti/BDD film three-dimensional porous structure. The electrochemical effective surface area for porous Ti/BDD anode was 8.37 cm 2 /cm 2 , 3.2 times as much as that of two-dimensional flat Ti/BDD electrode. Furthermore, the generation ability and rate of hydroxyl radical ( OH) on porous BDD electrode were enhanced due to the porous structure of BDD film. The step currents on porous Ti/BDD were about 2 times of those on flat Ti/BDD electrode from chronoamperometry curves, porous Ti/BDD exhibited superior indirect electrochemical oxidation ability. The results of electrodegradation of several typical organic pollutants (oxalic acid, phenol, sodium dodecylbenzene sulfonate, xylenol orange) revealed that current efficiencies on porous Ti/BDD electrode were about 30% higher compared with flat BDD electrode, corroborating the enhanced of electrochemical oxidation as the introduction of porous Ti substrate. Moreover, the discrepancy between promotion of COD removal rate and enhancement of OH was discussed.
研究领域:
环境科学
·
电化学工程
✓ 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）