Transactions of the Indian Ceramic Society
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2020
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IF 0.952
Shifa Wang,Huajing Gao,Hong Yu,Peiying Li,Yanwu Li,Chaoli Chen,Yong Wang,Liang Yang,Zijuan Yin
MgAl2O4:M (M = Ti, Mn, Co, Ni) phosphors were successfully prepared by a modified polyacrylamide gel method. Calcination temperature and metal particle has significant effects on the phase transition, optical and color properties of Mg Al2O4: M phosphors. Ti, M n, Co and Ni metal particles introduced into the MgAl2O4 system can produce a variety of colours from white, grayish black, blue to turquoise blue. Mn, Co and Ni metal particles added into MgAl2O4 system can extend their light absorption to visible light range, while the Ti metal particles clad into the system did not improve significantly. Co metal particles appended into the MgAl2O4 system can cause fluorescence quenching of emission peak at 395 nm and enhancement of emission peak at 405 nm, while the Ti and Mn metal particles infused into the system can bring the enhancement of visible emission peak at 425 nm. The fluorescence quenching of the peak at 395 nm can be ascribed to the wavelength of Co metal particles matching the surface plasmon absorbance band of MgAl2O4:M phosphor. A reduction in emission intensity at 425 nm can be assigned to electron transfer from the conduction band (CB) of MgAl2O4 to the CB of metal particles causing non-radiative decay.
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高影响因子
Nanoscience and Nanotechnology Letters
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2017
·Vol. 9
·期 6
·867-872
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IF 1.889
Du Jingjing,Song Ya,Feng Yahui,Li Na,Tan Haihu,Li Changyun,Xu Lijian
Hierarchically nanoporous Ti–SiO2 particles were synthesized by dissolving template method, and the hierarchically nanoporous Au@Ti–SiO2 particles were further prepared by in-situ synthesis method using NaBH4 as reducing agent. The
components of the hierarchically nanoporous Au@Ti–SiO2 particles and Ni–W–Co alloy electrode were investigated by energy dispersive spectrometer (EDS). In addition, the hierarchically nanoporous Au@Ti–SiO2/Ni–W–Co composite electrode
was fabricated by the method of composite electrodeposition using hierarchically nanoporous Au@Ti–SiO2 particles as composite nanoparticles. Finally, the electrocatalytic activities for hydrogen evolution of different electrodes were investigated. Results showed that, the
mass fractions of Ni, W and Co were 62.78%, 11.75% and 25.47% respectively in the coating of Ni–W–Co alloy electrode. The mass fractions of Au and Ti were 0.94% and 4.21% respectively in the hierarchically nanoporous Au@Ti–SiO2 particles which indicated that the
Au nanoparticles were successfully doped into the hierarchically nanoporous Ti–SiO2 particles. And the results of electrocatalytic activity study showed that, Co and W have good electrocatalytic activity for hydrogen evolution, which can greatly improve the electrocatalytic
activity for hydrogen evolution. The electrocatalytic activity of Ni–W–Co alloy electrode was superior than that of Ni electrode and Ni-Walloy electrode. The electrocatalytic activity for hydrogen evolution of hierarchically nanoporous Au@Ti–SiO2/Ni–W–Co
composite electrode was improved because of adding Au@Ti–SiO2 and reached the optimal value when the concentration of nanoporous Au@Ti–SiO2 particles was 1.6 g/L.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2022
·
IF 10.319
Tao Xiang,Peng Du,Zeyun Cai,Kun Li,Weizong Bao,Xinxin Yang,Guoqiang Xie
The contradiction between the strength and ductility of metallic materials is a major scientific problem that has been researched for a long time. Dual-phase equiatomic and non-equiatomic Ti-Zr-Nb-Ta high-entropy alloys (HEAs) with super-high strength and excellent ductility have been successfully developed via mechanical alloying (MA) combined with spark plasma sintering (SPS) technology. This is adjusted by altering the atomic ratios of the different phases. X-ray diffraction (XRD) and transmission electron microscopy (TEM) were performed to confirm the dual-phase microstructure. After the SPS process, the average grain size of the aforementioned equiatomic Ti 25 Zr 25 Nb 25 Ta 25 HEAs (134 ± 50 nm) evaluated by electron back-scattering diffraction (EBSD) is smaller than that of the Ti-Zr-Nb-Ta HEAs (150 µm), which were fabricated using arc melting. According to the Hall-Petch formula, the grain boundary strengthening contribution in the Ti-Zr-Nb-Ta system is 33-fold higher than those fabricated using the arc-melting process. When the alloy phase comprises the equivalent dual-phase, equiatomic Ti 25 Zr 25 Nb 25 Ta 25 HEAs have good comprehensive performance compared to non-equiatomic Ti-Zr-Nb-Ta HEAs prepared using the same process. The yield strength of equiatomic Ti 25 Zr 25 Nb 25 Ta 25 HEAs (2212 ± 38 MPa) is two-fold higher than that of Ti-Zr-Nb-Ta HEAs (1100 ± 90 MPa) fabricated via arc melting. This can be attributed to the ultra-fine grain size. Notably, the equiatomic Ti 25 Zr 25 Nb 25 Ta 25 HEAs possess approximately the same biocompatibility as commercial pure Ti (CP-Ti), indicating that the equiatomic Ti 25 Zr 25 Nb 25 Ta 25 HEAs are provided with a possibility as an advanced biomaterial for the applications of the medical field.
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DENTAL MATERIALS
·
2021
·
IF 5.304
Danlei Zhao,Haoran Dong,Yuting Niu,Wenjie Fan,Muqi Jiang,Ke Li,Qingsong Wei,William M. Palin,Zhen Zhang
Objective Guided bone regeneration (GBR) techniques use barrier membranes to augment the alveolar ridge for the site-specific growth of bone defects. However, current approaches using cast metal substructures exhibit poor adaptation to the surgical site and increased risk of infection. This study aimed to fabricate multi-functional coatings with 3D-printed porous titanium-niobium (Ti-Nb) alloy meshes to maintain space, prevent the ingrowth of fibroblasts and inhibit the colonization of bacteria for GBR. Methods Ti-Nb alloy meshes were prepared by selective laser melting (SLM) and used as substrates for novel surface coatings. Porous chitosan (CS)/ gelatin (G)/ doxycycline (Dox) coatings were formed on the meshes using electrophoretic deposition (EPD) and freeze-drying. The process of EPD was characterized through Fourier transform infrared spectroscopy (FT-IR), zeta potential, and particle size analysis. The cytotoxicity of the coatings was evaluated through the culture of osteoblasts and immunostaining. The antibacterial activity of the coatings was tested using inhibition zone tests against Staphylococcus aureus ( S. aureus ) and scanning electron microscope (SEM). The inhibition of fibroblasts infiltration and nutrients transfer properties were analyzed using immunostaining and permeability tests. Results High yield strength (567.5 ± 3.5 MPa) and low elastic modulus (65.5 ± 0.2 GPa) were achieved in Ti-Nb alloy bulk samples. The data of zeta potential, FT-IR and SEM indicated that porous spongy coatings were chemically bonded following EPD. In vitro analysis of CSGDox1 (containing Dox at 1 mg·mL −1 ) coating revealed its antibacterial effect and biocompatibility. Moreover, the CSGDox1 coating was proved to be effective for preventing the ingrowth of fibroblasts, whilst allowing the infiltration of nutrients. Significance This study verified that the EPD of CSGDox coatings on the 3D-printed Ti-Nb meshes can maintain space, provide antibiotic release whilst maintaining a barrier against soft-tissue growth, which is essential for the success of GBR treatment.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2025
·
IF 5.2
Fangfang Yang,Xueyan Wang,Jialu Li,Zhanfeng Li,Zonghua Wang
In recent years, the ultrasonic removal of organic pollutants has attracted a great deal of attention. In this study, a novel MOF-based sonocatalyst with bimetallic center was formed by doping Zr atoms into the MX@MIL-125(Ti), aiming to improve the ultrasonic removal performance of organic pollutants. The successfully prepared MX@MIL-125(Ti/Zr) showed a porous structure with abundant grooves and channels (average pore size of 21.8 nm, and specific surface area of 36.910 m 2 /g), and significantly had a higher quantum yield (13.24 %) than MIL-125(Ti) and MX@MIL-125(Ti), thereby producing more OH and O 2 − free radicals under ultrasonic irradiation. The experimental results showed that the MX@MIL-125(Ti/Zr) had good sonocatalytic activity and could effectively deal with small-molecule dyes and macro-molecule microplastics under ultrasonic conditions, where the removal efficiency achieved approximately 95 % for Rhodamine B (within 12 min) and approximately 90 % for micro-polyethylene (within 4 h in the presence of persulfate). In addition, a possible degradation-dominant mechanism was proposed to explain the MX@MIL-125(Ti/Zr)-mediated sonocatalytic removal, where the existence of Zr atoms could help sono-excited electrons generate and transfer onto the conductive MXene, thereby facilitating more charge carriers to create reactive free radicals. Therefore, the study would provide a green and feasible approach for the industrial treatment of organic pollutants in water bodies.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Tianying Peng,Wenyong Mei,Jin Zhang,Saiwen Liu
4-Aminophenol (4-AP), a crucial organic intermediate in the synthesis of acetaminophen, poses significant toxicity and potential environmental and health risks. Titanium dioxide@ titanium-based metal–organic frameworks (TiO2@Ti-MOFs) form a three-dimensional heterogeneous composite structure by covalently binding to the surface of 2D transition metal carbides and nitrides (MXenes). The synergistic effect between the porosity of titanium-based metal–organic frameworks (Ti-MOFs) and the layered structure of MXenes provides abundant adsorption sites, effectively enriching the target molecule 4-AP and enhancing the sensor's selectivity. The high conductivity of MXenes, combined with the semiconductor properties of TiO2@Ti-MOFs, accelerates electron transfer on the electrode surface, resulting in an increased response current and improved sensitivity and detection range. The detection range of the TiO2@Ti-MOF/MXene electrochemical sensor spans from 0.5 to 50 μM, with a detection limit of 0.16 μM. This sensor is effectively applicable for detecting 4-AP in real water samples, such as tap water and Qingshan Lake water, demonstrating satisfactory recovery.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 106
·期 2
·860-866
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IF 4.186
Weiliang Jin,Jie Pang,Qian Kou,Chuntao Ge,Hongmin Zhu,Geir Martin Haarberg,Saijun Xiao,Jun Zhang
This paper demonstrates the availability of electro-codeposition (i.e., the simultaneous occurrence of electrophoretic deposition of nanoparticles and electrochemical deposition of metal ions) in molten salts without the assistance of stirring of the bath. In molten NaCl–KCl–AlCl 3 –MoO 3 system containing TiB 2 nanoparticles at 710°C, the electro-codeposition of TiB 2 nanoparticles and Mo(VI) ions has been achieved, and a (Ti, Mo)B 2 coating has been prepared.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Chaocheng Liu,Xucai Kan,Feng Hu,Xiansong Liu,Shuangjiu Feng,Jiyu Hu,Wei Wang,Khalid Mehmood Ur Rehman,Mudssir Shezad,Cong Zhang,Haohao Li,Shengqiang Zhou,Qiuyue Wu
M-type strontium hexaferrites is a vital functional material , Co-Ti co-substitution is one of the most effective ways to regulate its performance to meet the desired requirements exactly. Herein, we report the synthesis, microstructure, permeability, magneto-thermal and magnetic properties of Co-Ti substituted SrM-based hexaferrites . FT-IR spectra and XPS survey confirm that hexagonal crystal structure is formed completely, which are correlate closely with the results of Rietveld refinement of XRD patterns . M ( T ) curves illustrate that T p decreases from 323 K to 276 K induced by the specific substitution. M ( H ) branches show M s increases slightly while H c decreases rapidly with increasing x , and the sample performs as soft magnetic properties when x ≥ 1.00. In addition, besides the imaginary permeability ( μ '') can be reduced obviously by substituting cobalt-titanium, the characteristics of low core loss ( P cv ) and high quality factor ( Q ) for the sample are performed thoroughly, indicating the excellent performance in the field of multilayer inductors.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yuying Ma,Zongyuan Li,Guixue Liang,Haijiao Xie,Fei Liu,Hai Fan,Jing Xu
Ti doping intensifies the lattice asymmetry of KNbO 3 , resulting in a stronger polarization field. • Ti 3d orbitals hybridize into the CB of KNbO 3 , boosting photoelectron reduction ability. • Waste PBAT is selectively converted to high-value terephthalic acid via photocatalysis. Photocatalytic plastic upcycling offers a sustainable route to combat plastic pollution, yet its efficiency is severely bottlenecked by rapid charge recombination. Herein, B-site Ti-doped KNbO 3 ferroelectric perovskites were engineered for the selective conversion of PBAT into high-value terephthalic acid (PTA) monomers. Comprehensive characterizations and density functional theory (DFT) calculations reveal that the disparities in ionic radius and electronic configuration between Ti 4+ and Nb 5+ induce a dual-functional modification of KNbO 3 . Structurally, Ti incorporation intensifies the local lattice asymmetry of KNbO 3 and amplifies the off-center spatial displacement of charge centers, thereby reinforcing the intrinsic bulk polarization field to accelerate the separation of photogenerated charges. Electronically, the hybridization of Ti 3d orbitals elevates the conduction band bottom, boosting the reduction power of photogenerated electrons to drive rapid ·O 2 − generation for selective PBAT ester bond scission. Benefiting from this structural and electronic synergism, Ti-KNbO 3 achieves a 2.1-fold increase in the PTA production rate compared to pristine KNbO 3 . Furthermore, Ti-KNbO 3 demonstrates robust performance in converting post-consumer real-world PBAT products. This work provides an effective polarization and band-engineering regulation strategy for ferroelectric photocatalysts and advances the valorization of biodegradable plastic waste. Download: Download high-res image (115KB) Download: Download full-size image
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Journal of Energy Chemistry
·
2023
·
IF 13.1
Yiran Sun,Pengfei Zhou,Siyu Liu,Zhongjun Zhao,Yihao Pan,Xiangyan Shen,Xiaozhong Wu,Jinping Zhao,Junying Weng,Jin Zhou
P2-Na 0.67 Ni 0.33 Mn 0.67 O 2 (NNMO) is promising cathode material for sodium-ion batteries (SIBs) due to its high specific capacity and fast Na + diffusion rate. Nonetheless, the irreversible P2-O2 phase transformation, Na + /vacancy ordering, and transition metal (TM) dissolution seriously damage its cycling stability and restrict its commercialization process. Herein, Na occupation manipulation and interface stabilization are proposed to strengthen the phase structure of NNMO by synergistic Zn/Ti co-doping and introducing lithium difluorophosp (LiPO 2 F 2 ) film-forming electrolyte additive . The Zn/Ti co-doping regulates the occupancy ratio of Na e /Na f at Na sites and disorganizes the Na + /vacancy ordering, resulting in a faster Na + diffusion kinetics and reversible P2-Z phase transition for P2-Na 0.67 Ni 0.28 Zn 0.05 Mn 0.62 Ti 0.05 O 2 (NNZMTO). Meanwhile, the LiPO 2 F 2 additive can form homogeneous and ultrathin cathode-electrolyte interphase (CEI) on NNZMTO surface, which can stabilize the NNZMTO-electrolyte interface to prevent TM dissolution, surface structure transformation, and micro-crack generation. Combination studies of in situ and ex situ characterizations and theoretical calculations were used to elucidate the storage mechanism of NNZMTO with LiPO 2 F 2 additive. As a result, the NNZMTO displays outstanding capacity retention of 94.44% after 500 cycles at 1C with 0.3 wt% LiPO 2 F 2 , excellent rate performance of 92.5 mA h g −1 at 8C with 0.1 wt% LiPO 2 F 2 , and remarkable full cell capability. This work highlights the important role of manipulating Na occupation and constructing protective film in the design of layered materials, which provides a promising direction for developing high-performance cathodes for SIBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固态化学
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电池技术
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Hao Li,Yao Tang,Zhicai Zhang,Chao Wang,Zhiqiang Hou,Yikan Yang,Jiao Yang,Haikuo Wang
Three-dimensional network-structured titanium matrix composites are promising for elevated-temperature applications, but their performance is often limited by grain coarsening and interfacial instability. In this work, Ti-6Al-4V matrix composites reinforced with in-situ TiB–TiC networks and trace Y 2 O 3 were fabricated by high-pressure high-temperature sintering at 5.5 GPa. The effects of sintering temperature and Y 2 O 3 addition on microstructure evolution, thermal stability, mechanical properties, high-temperature compression behavior, and cyclic oxidation resistance were investigated. At 1600 °C, the reaction between Ti64 and B 4 C led to the formation of a continuous TiB–TiC network along prior particle boundaries. The addition of 0.2 wt% Y 2 O 3 retained the network structure and refined the α–Ti matrix, decreasing the average grain size from 1.16 μm to 0.86 μm. The Y 2 O 3 -containing composite exhibited an ultimate compressive strength of 1771 MPa at room temperature and maintained a hardness of about 484 HV after annealing at 600 °C for 100 h. During high-temperature compression, it achieved a compressive stress of approximately 1098 MPa with 18.1% strain at 600 °C and sustained more than 45% strain at 800 °C without fracture. Cyclic oxidation tests showed that the Y 2 O 3 -containing composite had the lowest mass gain among the tested samples. Cross-sectional observations revealed a thinner oxide scale at 600 °C and retained Y–O-rich particles near the oxide/substrate region, suggesting improved local interfacial stability. These results demonstrate that combining a TiB–TiC network with trace Y 2 O 3 is an effective route to improve the high-temperature performance of Ti64-based composites.
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Small
·
2026
·
IF 12.1
Yueguang Fang,Chenxi Li,Xinqi Li,Lanling Xiu,Dingwen Xiao,Miao Wang,Lin Sun,Junwei Ye
Titanium-based materials hold great biomedical potential owing to excellent biocompatibility. But titanium diboride (TiB 2 ), an emerging metal boride, is rarely explored for antitumor use, and developing multifunctional TiB 2 -based nanoplatforms with enhanced catalytic activity is urgently needed. Herein, we constructed a nanoplatform (TiB 2 -PEG-DOX) by modifying TiB 2 nanosheets (TiB 2 NSs) with amino polyethylene glycol (NH 2 -PEG-NH 2 ) and loading doxorubicin (DOX) via electrostatic interaction. We first clarified the boron (B)-mediated Ti valence cycle: B regulates Ti electron transfer, promotes Ti 4+ reduction to Ti 2+ , enhancing H 2 O 2 -rich tumor microenvironment Fenton-like reaction to generate cytotoxic •OH for chemodynamic therapy (CDT). Meanwhile, TiB 2 -PEG-DOX shows 53.53% photothermal conversion efficiency under 808 nm near-infrared (NIR) irradiation for efficient photothermal therapy (PTT), and NIR further triggers on-demand DOX release. DOX accumulates at tumor sites via the enhanced permeability and retention (EPR) effect to exert chemotherapy (CT). In vitro, it eliminates 86.32% of HCT-116 colorectal cancer cells via CDT/PTT/CT synergy; in vivo, it achieves nearly complete tumor ablation in mice with excellent biocompatibility. This work provides a high-performance synergistic antitumor platform and establishes a B-modulated metal valence cycling paradigm, paving the way for titanium-based nanomedicines.
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高影响因子
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