IONICS
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2025
·
IF 2.6
Lu Lianwu,Guo Shenghui,Hua Yixin,Cheng Mingqiang,Zhang Yinghua,Gao Lei,Ru Juanjian
Brightly saturated oxide films are successfully prepared on Ti sheets surface by anodic oxidation in ethaline deep eutectic solvent (DES) with the regulation of H 2 O content, to enhance the decorative and corrosion resistance. As H 2 O content increases from 0 wt .% to 100 wt .% in the DES, the colored surface of Ti sheets exhibits a highly reproducible and a variety of colors including yellow, brown, red, purple, and blue. The role of H 2 O during the coloring process is discussed to shed light on the deeper causes of the color changes of Ti sheets. There exists a critical H 2 O content, i.e. 20 wt. %, and below this value, it benefits to the increase of bath voltage and the formation of oxide films, reflecting in a regular change in the color of Ti sheets. Above 20 wt. %, some characteristics conferred by ethaline DES may be weakened, so that the color of Ti sheets basically remains unchanged in blue tone. Besides, systematically characterizations of colored Ti sheets demonstrate that non-stoichiometric titanium oxides are formed as a mixture of TiO 2 , Ti 2 O 3 and TiO. The variations in H 2 O content have significant impacts on the surface composition of colored Ti sheets, resulting in an increased O/Ti ratio of the surface oxides and altering the optical properties of the colored films. Furthermore, the EIS and dynamic potential polarization tests show a significant increase in impedance and a decrease in corrosion current density for the colored Ti sheets compared to the untreated, implying an enhancement in corrosion resistance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2021
·
IF 5.161
Yangyang Duan,You Wu,Ru Yan,Meng Lin,Shengjun Sun,Houyi Ma
A polyelectrolytes coating with self-healing and self-strengthening dual-function was fabricated on the titanium sheet for anticorrosion studies in fluorine-containing artificial saliva. The coating contains a polydopamine bottom film and 2-hydroxypropyltrimethyl ammonium chloride chitosan and sodium alginate multilayers. The incorporated polydopamine bottom film was modified to assure the adhesion of the polyelectrolytes coating on the titanium sheet. Based on the scratch assay, there are two stages for the scratched coating immersed in fluorine-containing artificial saliva: healing and strengthening. Results exhibited that the coating possesses a remarkable self-healing property in the early-stage immersion due to the swollen polyelectrolytes migrating to the scratched region and the calcium cations of the corrosive medium as an ionic crosslinker intercalated in the swollen polyelectrolytes forming calcium alginate and filling the micro-scale scratch. During the later-stage immersion, the self-healing coating showed excellent self-strengthening performance originating from the formation of the more and more compact film with calcium cations intercalated. This research provides an effective strategy to prolong the service life and improve corrosion performance for the implants in the human body environments.
研究领域:
材料科学
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生物医学工程
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腐蚀与防护
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产品关联
DOI
高影响因子
Royal Society Open Science
·
2021
·Vol. 8
·期 3
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IF 2.963
Xiangping Chen,Xin Li,Dedong Chen,Lishi Wang
Anodization is a widely used method to obtain multicoloured oxidized titanium sheets. However, most researchers paid great attention to the colour-related properties instead of photoelectrical properties of titanium oxide film obtained by anodization. In this work, to study their photoelectrical properties, a series of multicoloured oxidized titanium sheets were prepared by anodization method, and UV–vis absorption and photocurrents were tested. The relationship between anodization voltages/anodization durations and photocurrents of titanium sheets was studied. Results show that titanium sheets have excellent photoelectrical performance. With the increase of anodization voltage, the number of UV–vis absorption peaks increased under visible light which means increasing absorption. When anodization duration increased, absorption band edge also increased in the visible light region, which means the band gap needed to produce charge transfer transition decreased. Under simulated sunlight and applied voltage of +0.4 V, photocurrent increased with the increase of either anodization voltage or anodization duration, and can be expressed by linear equations. In addition, anodization currents were recorded during anodization. Morphology, crystal structure and photoelectrical properties of anodized titanium sheets were characterized. The anodized titanium sheets can not only be used as decorative material in jewellery and architecture fields etc. but also are supposed to be used as photoelectrical catalyst in further work.
研究领域:
材料科学
·
光电催化
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产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2019
·
IF 0
Hongbin Chu,Kun Jiang,Guohui Li,Zhigang Zhao,Qingwen Li,Fengxia Geng
The rapid advances in portable and wearable electronics have triggered an ever-increasing demand for flexible energy storage devices. Because of concerns on the limited lithium resources and constantly increasing lithium prices, it is predicable that flexible rechargeable sodium (Na)-ion batteries could pave the way for broader acceptance of wearable energy storage devices. However, developing flexible electrodes for rechargeable Na-ion batteries has been seriously limited on account of the reduced availability of electrodes that can host bulky Na ions while maintaining structural integrity. Here, a stacking assembly of Na-ion intercalation materials, titania sheets, was designed and fabricated by a simple vacuum-assisted filtration method. Chemically reduced graphene oxide was molecularly hybridized and served as the current collector, and trace carbon nanotubes were introduced between the sheets for improved electrolyte infiltration and ion intercalations. As a result, the designed electrode manifested good mechanical flexibility integrated with excellent electrochemical Na-ion storage performance, delivering an initial discharge capacity of 130 mA h g–1 at 15 mA g–1 and still preserving 74% after 500 cycles. A quasi-solid-state Na-ion full battery employing the designed electrode coupled with Prussian blue maintained excellent Na-ion storage performance. Importantly, the electrochemical behavior was not affected by the battery shape or external mechanical deformation, demonstrating practical applicability to powering various wearable electronic devices. The work is expected to accelerate the utilization of two-dimensional sheet materials in flexible energy storage systems.
研究领域:
材料科学
·
能源存储技术
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产品关联
DOI
Energy Storage Materials
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2019
·
IF 0
Yuyuan Zhou,Kun Jiang,Zhigang Zhao,Qingwen Li,Renzhi Ma,Takayoshi Sasaki,Fengxia Geng
Following the rapid development of wearable technology , fiber-shaped energy storage systems integrating the merits of being lightweight and flexible are receiving unprecedented attention. Meanwhile, considering the increasing concerns for the scarcity of lithium (Li) resources, research on rechargeable batteries that use sodium (Na) as the shuttling ion is rapidly growing. As yet, there have been very few successful demonstrations of fiber-shaped Na-ion batteries, probably due to the lack of mechanically stable electrodes that can sustain the insertion of large-sized Na ions . Herein, by stacking giant two-dimensional sheet forms of an electrochemically active material, titania, along with reduced graphene oxide (rGO), into a belt-shape and placing one-dimensional carbon nanotubes (CNTs) sporadically between the neighboring sheets, a fiber electrode with decent Na-ion storage performance was successfully obtained. Benefiting from the conformal stacking of the electrochemically active and charge-collecting components, the fiber electrode did not require any conducting backbones, and thus exhibited outstandingly robust integrity. The incorporation of CNTs with a differing dimension disordered the stacking structure, which opened up paths for Na-ion intercalation, thus enabling exceptionally long-term reversible Na-ion intercalation/deintercalation, even under bending conditions. This work developed a new paradigm toward designing novel fiber electrodes that can host large alkaline ions for use in future flexible and portable electronic devices.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
ACS Applied Materials & Interfaces
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2020
·
IF 8.758
Guohui Li,Wen-Bin Gong,Tianlun Qiu,Shan Cong,Zhigang Zhao,Renzhi Ma,Yuichi Michiue,Takayoshi Sasaki,Fengxia Geng
Surface-enhanced Raman scattering (SERS) employing a non-noble substrate in comparison with conventional noble-metal ones offers advantages of low cost and rich selection of candidates; however, its application has been seriously hindered by its unsatisfactory detection sensitivity, poor uniformity, and undesirable modification of vibrational signals via changing the orientation and/or polarizability of probe molecules. Here, an unusually sensitive but nonselective enhancement was achieved by employing titanium carbide sheets modified with aluminum oxyanions in situ as active supports for Raman measurement. The analyte molecules adopted a conformation similar to what they adopt on a bare substrate, while closely interacting with the aluminum oxyanion surface, which leads to the rare observation of highly sensitive but nonselective enhancement with a detection limit close to the pM level. With the substrate surface roughness in the nanometer region, an outstanding uniformity with a relative standard deviation of less than 4.3% was achieved. In addition, the SERS effect on the modified titanium carbide sheets was shown to be applicable to a wide range of analyte molecules, including both organic dyes and trace harmful compounds. The success of the work demonstrates the feasibility of surface tuning to improve the SERS effect, and it introduces a new window for two-dimensional materials in SERS applications.
研究领域:
材料科学
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分析化学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2023
·
IF 5.8
Bingbing Zhu,Erna Jia,Qimeng Zhang,Yanyan Zhang,Hua Zhou,Ying Tan,Zhennan Deng
Zwitterionic polymers have attracted considerable attention because of their anti-adsorption and unique anti-polyelectrolyte effects and was widely used in surface modification. In this study, zwitterionic copolymers (poly (sulfobetaine methacrylate-co-butyl acrylate) (pSB) coating on the surface of a hydroxylated titanium sheet using surface-initiated atom transfer radical polymerization (SI-ATRP) was successfully constructed. X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR) and Water contact angle (WCA) analysis proved the successful preparation of the coating. The swelling effect caused by the anti-polyelectrolyte effect was reflected in the simulation experiment in vitro, and this coating can promote the proliferation and osteogenesis of MC3T3-E1. Therefore, this study provides a new strategy for designing multifunctional biomaterials for implant surface modifications.
研究领域:
生物材料
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表面化学
·
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）