Materials Science & Engineering C-Materials for Biological Applications
·
2015
·
IF 3.088
Yong Liu,Kaiyang Li,Tao Luo,Min Song,Hong Wu,Jian Xiao,Yanni Tan,Ming Cheng,Bing Chen,Xinrui Niu,Rong Hu,Xiaohui Li,Huiping Tang
In this work, powder metallurgical (PM) Ti–Mg alloys were prepared using combined techniques of mechanical alloying and spark plasma sintering. The alloys mainly consist of super saturations of Mg in Ti matrix, and some laminar structured Ti- and Mg-rich phases. The PM Ti–Mg alloys contain a homogeneous mixtures of nanocrystalline Mg and Ti phases. The novel microstructures result in unconventional mechanical and biological properties. It has been shown that the PM Ti–Mg alloys have a much lower compression modulus (36–50 GPa) compared to other Ti alloys, but still remain a very high compressive strength (1500–1800 MPa). In addition, the PM Ti–Mg alloys show good biocompatibility and bioactivity. Mg can dissolve in the simulated body fluids, and induce the formation of the calcium phosphate layer. The compression modulus of PM Ti–Mg alloys decreases with the amount of Mg, while the bioactivity increases. Although the corrosion resistance of Ti–Mg alloys decreases with the content of Mg, the alloys still show good stability in simulated body fluid under electrochemical conditions. The indirect and direct cytotoxicity results show that PM Ti–Mg alloys have a good biocompatibility to NIH-3T3 cells. Therefore, the PM Ti–Mg alloys are promising candidates in biomedical applications.
研究领域:
材料科学
·
生物医学工程
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Kui Tang,Xiaoyuan Chen,Zhenhua Tang,Zhao Qin,Kangzhen Xu,Ruiqi Shen,Tuan Zhao,Suhang Chen
The microwave ignition holds potential in the ignition of weapons due to its simple structure, non-contact property, and simultaneous ignitions of large area. However, the long ignition delay time of the current ignition agents cannot meet the microwave weaponry advancements. To address the issues, a microwave sensitive oxide-CuFe 2 O 4 (CUFO) which was firstly discovered to be easily ignited by microwaves compared many ferrites, was coupled with Ti nanoparticles (n-Ti) to form Ti/CUFO microwave ignition agents by electrostatic spray granulation. The characterization of microwave ignition, volumetric combustion, burning rate and DSC were used to determine its ignition delay time and the energy release properties. It indicates that the microwave sensitivity, maximum peak pressure and pressure pressurization rate of Ti/CUFO first increases and then decreases with the promoting content of n-Ti. The Ti/CUFO at Φ = 3.5 exhibits the lowest ignition delay time by 79.24 ms compared to the 98.7 ms of n-Ti, meanwhile, its maximum peak pressure and pressurization rate reach the highest by 338.54 kPa and 8.57 kPa/ms, respectively. The DSC results indicate that Ti/CUFO exhibits much lower reaction peak temperature by 320–335 °C compared to 488 °C of n-Ti, which suggests Ti-CUFO reaction maybe much easier be activated. The dielectric loss of n-Ti and CUFO under strong electric field transfer the energy of microwaves to heat, reaching to its reaction temperature. The XPS and XRD results of CUFO after microwave radiation disclosing the crystal transition, formation of divalent iron and oxygen vacancies , as well as the released bright light under microwave radiation , suggest the thermal breakdown mechanism of CUFO. When Ti/CUFO exposes into microwaves, CUFO generates oxygen vacancies due to heat loss and n-Ti is dielectric heated, followed by the generated oxygen reacting with n-Ti, improving the combustion performance of n-Ti. This result provides new insight for the designing of microwave ignition.
研究领域:
材料科学
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能源与动力工程
·
化学工程
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DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Xiaoping Chen,Yuansong Wei,Bohong Chen,Jiaqi Fu
In this study, a Ti foam-based photocatalytic membrane reactor (PMR) was constructed for rhodamine B (RhB) wastewater decolorization. Ti foam was chosen as a membrane and visible-light-driven C3N4 was chosen as a photocatalyst. The results showed that the decolorization efficiency could be up to 100% with a flow rate of 6.93 mL/min when the PMR was applied in the treatment of a 30 mg/L RhB solution and the concentration of C3N4 was 1 g/L. pH played an important role in the decolorization performance of the PMR. Alkalinity was not conducive to the decolorization of RhB in the PMR, which was mainly due to the property that RhB was difficult to dissolve in an alkaline solution. Membrane fouling was mainly caused by a C3N4 photocatalyst, while the effect of RhB on membrane fouling was negligible. Membrane fouling could be retarded when the PMR was applied for RhB treatment under visible-light irradiation, which was because of photoinduced hydrophilicity of C3N4. The membrane flux could be restored to its initial values after simple ultrasonic cleaning and backwashing. This was due to the large difference between the pore size of Ti foam and the particle size of C3N4 and the super hydrophilicity of Ti foam and C3N4.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
·
2023
·
IF 2.8
Youyu Li,Baijun Yan
Titanium-bearing blast furnace slag (Ti-bearing BF slag) is an important Ti-bearing resource as it contains almost 8–25% TiO2. Over 80 million tons of Ti-bearing BF slag have been accumulated in China. Therefore, recovering the Ti resource from Ti-bearing BF slag is of significance for the sustainable supply of titanium in China as well as in the world. In this paper, based on the chemical composition characteristic of Ti-bearing BF slag, a magnetic Ulvöspinel (Fe2TiO4) phase was formed by the addition of Fe2O3 in Ti-bearing slag. The effects of roasting temperature, roasting time, molar ratio of Fe2O3 to carbon powder and mass ratio of Fe2O3 to Ti-bearing BF slag on the fromation of Fe2TiO4 phase were investigated. The formation mechanism of the Fe2TiO4 grains was revealed by XRD, SEM-EDS, VSM and dissolution experiments. The result show that when 25% mass of Fe2O3 relative to the Ti-bearing BF slag was added, without adding carbon powder, and roasted at 1400°C for 6 h, a titanium concentrate with 22.5% of TiO2 was obtained, and more than 92% of the total titanium in the Ti-bearing BF slag was recovered.
研究领域:
冶金工程
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材料科学
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Shouli Bai,Shiyu Jia,Yingying Zhao,Pinggui Tang,Yongjun Feng,Ruixian Luo,Dianqing Li,Aifan Chen
Ti-doped α-Fe2O3 nanorods were prepared by a facile hydrothermal method, followed by a NiFe-LDH catalyst that was electrodeposited on the doped α-Fe2O3 nanorods to structure an integrating photoanode Ti:Fe2O3/NiFe-LDH for improving solar PEC water-splitting efficiency. The structure and properties of electrode materials were characterized and the PEC properties of photoanodes were measured. The results show that the photocurrent density of the photoanode enhances 11.25 times at 1.23 V (vs RHE) and the IPCE value enhances 4.10 times at 420 nm compared with pristine α-Fe2O3. The enhancement is attributed to the separating of photogenerated electron–hole, the increase of carrier density, and the acceleration of the carrier transfer rate due to the dual action of doping and catalysis.
研究领域:
材料科学
·
能源科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2020
·Vol. 29
·期 11
·7239-7249
·
IF 1.652
Sang Changcheng,Cai Xiaoping,Zhu Lu,Ren Xuanru,Niu Gao,Wang Xiaohong,Feng Peizhong
To achieve the low energy consumption and high strength joining between Ti and Ni, a novel joining method (rapid thermal explosion, TE) was developed for joining dissimilar metals using Ti-Al mixture powders as flux. The TE reaction temperature of Ti-Al flux was measured, and the microstructure and mechanical properties of Ti/Ni joint were investigated. The results reveal that the combustion temperature of the Ti-Al powder interlayer is 1103 °C, which is higher than the joining temperature, and an obvious self-exothermic phenomenon lasts 20 s. The intermetallic compound diffusion layers formed at both interfaces mainly owing to the diffusion of Al and the growth activation energy of diffusion layers near both interfaces are 79.68 kJ/mol and 38.26 kJ/mol, respectively. Based on the sheer strength and diffusion layer, the formation mechanism of Ti/Ni joints is metallurgical bonding through atomic diffusion and formation of the diffusion layer.
研究领域:
材料科学
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焊接工程
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金属间化合物
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界面化学
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固态连接
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
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IF 14.229
Shiyu Zhang,Meng Du,Zipeng Xing,Zhenzi Li,Kai Pan,Wei Zhou
Defective-rich and electron-rich mesoporous NH 2 -MIL-125(Ti)@ZnIn 2 S 4 /CdS hierarchical tandem heterojunctions were fabricated through two-step solvothermal and one-step hydrothermal strategies. The interface with electron enrichment can cause active interface reaction, fast transfer and separation of charge carriers and restrain the photocorrosion of CdS. ZnIn 2 S 4 , as a bridge to connect Ti-MOFs and CdS, favors the separation of charge carriers and forms tandem heterojunctions. The as-prepared photocatalyst has a relative large surface area of ∼877.0 m 2 g −1 and a narrow band gap of ∼1.84 eV, which could absorb visible light efficiently. Furthermore, it exhibits a high photocatalytic hydrogen generation rate which was increased to 2.367 mmol g −1 h −1 and the high photocatalytic degradation efficiency for 2,6-dichlorophen and 2,4,5-trichlorophenol which were 98.6% and 97.5%, respectively. Additionally, recycling text for several cycles indicates the high stability. This novel Ti-MOFs based core@shell hierarchical tandem heterojunctions may offer a new insight for fabricating high-performance heterojunctions for multi-channel charges transfer.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Catalysts
·
2020
·Vol. 11
·期 1
·24
·
IF 3.52
Juan Du,Jiaxin Zhang,Tingyu Yang,Renming Liu,Zhiyi Li,Dandan Wang,Tong Zhou,Yucun Liu,Chunbo Liu,Guangbo Che
The BiOI/NH2-MIL-125(Ti) composite photocatalyst with excellent photocatalytic performance was prepared by the solvothermal method. For the BiOI/NH2-MIL-125(Ti) (BNMT) system, the contents of NH2-MIL-125(Ti) in BNMT-4, BNMT-5, BNMT-7, BNMT-9, and BNMT-10 were 4 wt %, 5 wt %, 7 wt %, 9 wt %, and 10 wt %, respectively. XRD, XPS, SEM, and TEM characterizations indicated that BiOI/NH2-MIL-125(Ti) was successfully prepared. Brunauer, Emmett, and Teller (BET) and UV–vis diffuse reflectance spectra photoelectrochemical analysis indicated that BNMT-9 can make the specific surface area and photo absorption region larger than BiOI. In addition, the separation efficiency of photogenerated carriers was improved, and the recombination efficiency was reduced. The degradation percentages of Rhodamine B (RhB) and p-chlorophenol (P-CP) reached 99% and 90% over BNMT-9 under visible light irradiation. Additionally, the catalysts had high stability. The results of the active spices trapping experiments test indicated that h+was the main active species. The possible degradation mechanism was proposed.Keywords:photocatalysis;BiOI;NH2-MIL-125(Ti);organic pollutants
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
Molecular Catalysis
·
2022
·
IF 5.089
Ji Wang,Shuqing Zhang,Yiming Han,Lilei Zhang,Qingyin Wang,Gongying Wang,Xiaoming Zhang
PET (poly(ethylene terephthalate)) is one of the most important type of thermoplastic polyesters and widely used in various fields. Titanium-based catalysts are environmentally friendly and have higher catalytic activity than antimony-based catalysts when used in industry. However, titanium-based catalysts are prone to hydrolysis and result in discolored products. UiO-66 (Zr/Ti) with different Ti 4+ contents were successfully synthesized via one-step method. The material was characterized by XRD, SEM, FT-IR, XPS, BET and TG techniques. The results demonstrates that Ti 4+ was integrated into the UiO-66 framework. NH 3 - in situ DRIFTS, pyridine-IR, and NH 3 -TPD were used to explore the acidic properties of the samples, which proved that stable Lewis acidic sites are present in the samples even at 300 °C. The catalytic performance of UiO-66 (Zr/Ti) containing different Ti 4+ was explored under different conditions. At the same time, the scale-up experiment was carried out in a 5 L reactor, and the PET chips obtained had a lower b value. The catalytic reaction mechanism of UiO-66(Zr/Ti) was demonstrated by DFT calculations and the catalytic performance was close to Sb-based catalysts.
研究领域:
材料科学
·
化学工程
·
催化
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Mengwen Zhang,Fanyu Meng,Binyang Jiang,Jinsheng Li,Lei Fan,Shoulei Yang
To further enhance the performance of Al 2 O 3 -Ti(C,N) composites, this study employed novel sinter forging and dynamic sinter forging techniques, comparing them with conventional hot pressing and oscillatory pressure sintering. The results revealed that the composites produced by all four processes exhibited high density and no phase transition or formation of new phases. However, the composites prepared by sinter forging and dynamic sinter forging exhibited significantly improved strength and hardness. The hardness of the composites produced by sinter forging increased to 23.39 GPa, while the strength reached 1142 MPa, representing a 61 % improvement compared to those sintered by hot pressing. This improvement can be attributed to the significant plastic deformation induced by the sinter-forging process, which results in a higher dislocation density at the grain boundaries and within certain grains, enhanced coordinated deformation between grains, and stronger grain boundary bonding. Furthermore, the average grain size was smaller. Therefore, sinter forging and dynamic sinter forging offer substantial advantages in the preparation of advanced ceramics.
研究领域:
材料科学
·
陶瓷工程
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Jianmin Li,Changyan Guo,Yanan Niu,Xianglei Cao,Jiang Li,Jide Wang
The photocatalytic oxidation of benzyl alcohol and the simultaneous evolution of hydrogen from water are efficient dual-optimal routes. It is important to develop composite catalysts that combine redox properties and facilitate electron–hole separation and transport. Herein, the bimetallic-doped Mo-ZIS@Ti photocatalyst was designed and synthesized, and the selective oxidation of benzyl alcohol and hydrogen evolution by water splitting was realized at the same time. Under visible light irradiation, benzyl alcohol was completely converted with more than 99% selectivity for benzaldehyde, and the H2 production rate was 5.6 times higher than the initial ZIS. The exceptional catalytic performance was ascribed to utilizing Ti-MIL-125 as a precursor, wherein slowly releasing-doped Ti formed robust Ti–S bonds that quickly transfer electrons and reduce sites. Meanwhile, doping Mo effectively captures photogenerated holes and acts as active sites for oxidation reactions. Both experimental characterization and work function calculations demonstrate that the bimetallic synergism effectively modulates the electronic structure of ZIS, promotes the directional separation of electrons and holes, and significantly improves the photoactivity and stability of ZIS. This work contributes a route to obtain benzaldehyde and green hydrogen at the same time and also gives new insights for the construction and mechanism study of bimetallic-doping catalysts.
研究领域:
材料科学
·
催化
·
光化学
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产品关联
DOI
PubMed
高影响因子
Inorganics
·
2025
·Vol. 13
·期 2
·46
·
IF 3
Mingzhang Zhu,Jiannan Song,Senhua Ke,Yanhong Gu,Lina Bing,Zhenjiang Shen,Wanping Chen
Coating disk-shaped materials on the bottoms of containers has become a highly effective method for tribocatalysis enhancement. Here, the effects of Ti coatings on the tribocatalytic degradation of organic dyes by CdS nanoparticles were systematically studied. For both 50 mg/L rhodamine B (RhB) and 20 mg/L methyl orange (MO) solutions, the tribocatalytic degradation by CdS nanoparticles was dramatically enhanced in Ti-coated beakers compared to as-received glass-bottomed beakers, with the degradation rate constant increased by 4.77 and 5.21 times, respectively. Moreover, for tribocatalytic degradation of MO using CdS, two quite different MO degradation modes were identified between Ti and Al2O3coatings. Electron paramagnetic resonance (EPR) spectroscopy analyses showed that more radicals were generated when CdS nanoparticles rubbed against the Ti coating than against the glass bottom, and boron nitride nanoparticles were employed to verify that the enhancement associated with the Ti coating resulted from the interactions between Ti and CdS. These findings underscore the importance of catalyst and coating material selection in tribocatalytic systems, offering valuable insights for the development of efficient environmental purification technologies.
研究领域:
环境科学
·
材料科学
·
化学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）