JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Xin Tang,Ruipeng Mao,Fan Zhang,Yongzhong Jin,Wei Su,Wu Jiang,Junhao Wang
Cemented carbides play a pivotal role in diverse industrial sectors, and controlling abnormal grain growth and regulating the homogeneity of the Co binder phase are the key challenges to improve their properties. In this study, WC-10Co alloy was prepared for the first time by low-pressure sintering technique using (Ti, Cr, V, Nb, Mo)(C, N) high entropy powder as an inhibitor, focusing on the effect of trace additions of (Ti, Cr, V, Nb, Mo)(C, N) on the microstructure and mechanical properties of the alloy as well as friction and wear properties. The results show that under the conditions of sintering at 1420 ℃, a pressure of 3 MPa, and a holding time of 1 hour, the alloy with 0.2 wt.% high-entropy inhibitor exhibited the best comprehensive properties, with a flexural strength of 3752 MPa, a Vickers hardness of 1679 HV 30 , and a fracture toughness of 13.07 MPa·m 1/2 . During the stable stage of tribological testing, the average friction coefficient reached 0.6195, and the wear rate was as low as 1.34×10 -7 mm 3 /(N·m). The toughening and strengthening mechanism of the (Ti, Cr, V, Nb, Mo)(C, N) - modified alloy is mainly attributed to the significant refinement of WC grains, WC lattice contraction, and the formation of Co-based solid solutions by the high-entropy inhibitor. However, excessive addition deteriorates the overall performance. This study provides experimental data and technical insights for the development of a new generation of cemented carbides with high strength, high toughness, and excellent wear resistance.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Mian Yang,Kaihua Chen,Shenghui Guo,Ming Hou,Jiyun Gao,Junwen Zhou,Shuhao Shi,Li Yang
In this paper, the self-propagating reaction of the Ti–SiC–C system for synthesising Ti 3 SiC 2 -based diamond composites is ignited by the combustion of Ni–Al alloy powders in a microwave field. The heating curves of Ni–Al-assisted microwave sintering show that the self-propagating reaction could be successfully ignited after heating samples to 685.2 °C in a microwave field for 456 s. This finding indicates that ignition could occur at temperatures below the diamond graphitisation temperature (727 °C). X-ray diffraction analysis indicates that the sintered samples primarily comprise Ti 3 SiC 2 , TiC, Ti 5 Si 3 and C. Scanning electron microscopy coupled with energy dispersive spectroscopy observations demonstrates that the diamond grains are tightly bonded with the surrounding matrix and are intact. The best wear ratio of 302.26 was obtained for the Ti 3 SiC 2 -bonded diamond composite when the diamond grain size was 140/170 mesh and the molar ratio of Ti, SiC and C was 3:1.1:0.9.
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CARBON
·
2025
·
IF 11.6
Heng Zhang,Biao Hu,Yangmin Wu,Minglong Yan,Qinhao Zhang,Wenwu Xu,Wenjie Zhao
Metal corrosion and mechanical wear result in a serious decrease in the service life of marine engineering equipment. Carbon-based quantum dots (CDs) are often used as corrosion inhibitors or lubricants due to their ease of functionalization and quantum size effect. However, the protection efficiency of CDs is limited by weak adsorption capacity, and additional doping of heteroatoms such as N and S is usually needed to enhance the adsorption. Here, Ti 3 C 2 T x quantum dots (MQDs) were synthesized by using two-dimensional Ti 3 C 2 T x sheets containing abundant functional groups on the surface as precursors. The corrosion inhibition efficiency of MQDs with a concentration of 400 mg L −1 reached 94.2 %, and the coefficient of friction and wear rate were reduced by 67.6 % and 83.2 %, respectively, compared with the single NaCl solution. Surface analysis showed that MQDs blocked the penetration of corrosive species via forming a protective film on the steel surface through the formation of Ti–O–Fe coordination bonds. Notably, the thickness of protective film was affected by the pH of solution, reaching a maximum thickness of 215 nm at the NaCl solution with a pH of 7. Finally, density functional theory and molecular dynamics simulations were utilized to deeply reveal the adsorption mechanism of MQDs. This study provides new insights into the role of MQDs as dual-functional additives, which is of great significance in promoting the development of multifunctional marine engineering protective materials.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Shihui Wang,Yuzhou Xia,Guiyang Yan,Meixia Chen,Xuxu Wang,Ling Wu,Ruowen Liang
Inspired by the concept of frustrated Lewis pairs (FLPs) from homogeneous catalysis, an organic supramolecular bridged metal-organic frameworks (MOFs) heterojunction, i.e., a perylene-3,4,9,10-tetracarboxylic diimide@MIL-125(Ti)-NH 2 (denoted PDI@MTi) composite is successfully fabricated via a two-step synthesis method. Experimental characterisations and theoretical calculations reveal that in the obtained “TiO 5−x -ligand-PDI” FLPs, the unsaturated Ti-O clusters function as a Lewis acid to accept photogenerated electrons, and the PDI sites act as a Lewis base to capture photogenerated holes. With the unique structure characteristics, the PDI@MTi shows excellent photocatalytic activity toward the disinfection of Staphylococcus aureus and Cr(VI) reduction, with 1.0- and 10.3-fold enhancements, respectively, compared with unadorned MTi. The synergic effects of the micro polarisation field, multiple active sites, and a C-N bonded interface contributed to photoactivity enhancement. This work demonstrates the potential of using MTi as a platform for constructing FLPs-containing heterogeneous photocatalysts and provides new strategies to control carrier separation.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Syed Jalil Shah,Wenyuan Li,Ying Tang,Yang Hu,Shanliang Jiang,Hui He,Ruimeng Wang,Zhongxing Zhao,Zhenxia Zhao
Fabrication of broad-spectrum response photocatalysts in a controllable manner that can efficiently utilize solar light as much as possible remains a top priority target yet a challenging task. In this work, a facile approach of synchronous bottom-up growth was employed to construct UCNP/NMIL(Ti) nanohybrids via NH 2 -BDC (NH 2 -MIL-125-ligand) linkage between upconversion NaYbF 4 :Tm 3+ nanoparticles (~13-nm) and NH 2 -MIL-125. The ligand sharing integration strategy generated abundant oxygen vacancies and coordinatively-unsaturated-metal sites, efficiently enhanced light absorption, energy-transfer upconversion (UC-PL), photo-induced e - / h + generation, and their separation (CV, EIS, Photocurrent-density). Consequently, UCNP/NMIL(Ti) exhibited excellent acetaldehyde photodegradation activity, with 12.5–77.0-folds higher rate constants ( k a ) than those of state-of-the-art photocatalysts under visible light and high humidity. Furthermore, the photocatalytic activity of UCNP/NMIL(Ti) only declined from 96.0% to 92.5% after five cycling-runs, demonstrating its remarkable photo-catalytic stability. Considering these attributes, the current strategy provides an avenue to synthesize efficient UCNPs/MOF composites for widespread usage in a variety of commercial applications.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Zhenke Fan,Yong Zheng,Yuze Du,Xi Zhang,Yuqi Huang,Yufan Li,Shiqing Yu
This study fabricated single-layer antireflective coatings (ARCs) employing a Si-Ti modified hollow silica nanoparticle (HSN) sol with self-cleaning function via in situ polymerization. Both shell-like and chain-like SiO₂–TiO₂ composites were directly synthesized in an alkali-catalyzed hollow SiO₂ sol through acid catalysis, which endowed the coating with suitable hardness while maintaining higher transmittance, thereby improving its overall performance. The influence of varying Si-Ti precursor doping ratios on the surface morphology, structure, optical performance, mechanical strength, and wettability of the coatings was investigated. The resulting coatings exhibited superhydrophilic properties, with a minimum water contact angle (WCA) below 5°. At an optimal doping concentration of 15 wt%, the coating achieved a hardness of 3 H and a solar-weighted transmittance (T sw ) exceeding 95.49 % across the wavelength range of 380–1100 nm, markedly surpassing that of the K9 glass (T sw = 91.70 %). At this doping level, the self-cleaning capability, antifogging performance, and environmental durability of the coating were further analyzed. The coating reached a self-cleaning efficiency of 95.93 % and a slight decrease of 0.03 % in T sw . After steam condensation experiment (sample placed above deionized water at 90 ℃ for 1 min), the haze value remained below 2 %. After 30 days of damp testing (80 % RH at 25 ℃), the reduction in T sw was only 0.07 %. After 100 thermal cycles (−20 ℃/30 %RH ↔ 100 ℃/30 %RH, each condition held for 30 min), T sw decreased by 0.3 %.
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ADVANCED POWDER TECHNOLOGY
·
2020
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IF 4.217
Mingyi Zhang,Zenan Lin,Qingming Huang,Yadong Zhu,Hui Hu,Xiaohui Chen
In this research, a novel green mechanochemical dry gel conversion method (MDGC) is reported to obtain submicron-sized Ti-rich MWW zeolite. First, titanium and silica sources were milled under milder conditions in a planetary ball mill to construct the uniform SiO 2 -TiO 2 composite powders with higher Ti contents. Subsequently, submicron-sized Ti-rich MWW zeolite powder was prepared via dry gel conversion (DGC) route using the obtained composite under mixed steam environment consisting of water and piperidine. The physicochemical properties of the SiO 2 -TiO 2 composites before and after calcination and corresponding Ti-MWW-MDGC were investigated by XRD, UV–Vis, FT-IR, SEM, XRF, and N 2 absorption-desorption. Moreover, Ti-MWW (30)-MDGC exhibited a superior catalytic activity during epoxidation with H 2 O 2 compared with the traditional DGC method, and the conversion of 1-hexene increased from 4.2% to 26.3%. The MDGC method is a promising approach for the green production of various zeolites with higher heteroatom contents, such as TS-1, Ti-Beta and Sn-MWW, etc.
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ChemSusChem
·
2018
·Vol. 11
·期 19
·3486-3494
·
IF 7.411
Qijing Bu,Shuo Li,Qiannan Wu,Lingling Bi,Yanhong Lin,Dejun Wang,Xiaoxin Zou,Tengfeng Xie
Semiconductor electrodes integrated with cocatalysts are key components of photoelectrochemistry (PEC)-based solar-energy conversion. However, efforts to optimize the PEC device have been limited by an inadequate understanding of the interface interactions between the semiconductor–cocatalyst (sem|cat) and cocatalyst–electrolyte (cat|ele) interface. In our work, we used ferrihydrite (Fh)-modified Ti–Fe 2 O 3 as a model to explore the transfer process of photogenerated charge carriers between the Ti–Fe 2 O 3 –Fh (Ti–Fe 2 O 3 |Fh) interface and Fh-electrolyte (Fh|ele) interface. The results demonstrate that the biphasic structure (Fh/Ti–Fe 2 O 3 ) possesses the advantage that the minority hole transfer from Ti–Fe 2 O 3 to Fh is driven by the interfacial electric field at the Ti–Fe 2 O 3 |Fh interface; meanwhile, the holes reached at the surface of Fh can rapidly inject into the electrolyte across the Fh|ele interface. As a benefit from the improved charge transfer at the Ti–Fe 2 O 3 |Fh and Fh|ele interface, the photocurrent density obtained by Fh/Ti–Fe 2 O 3 can reach 2.32 mA cm −2 at 1.23 V versus RHE, which is three times higher than that of Ti–Fe 2 O 3 . Graphical Water splitting : The excellent performance of ferrihydrite (Fh)/Ti–Fe 2 O 3 is attributed to the unhindered charge transfer at the Ti–Fe 2 O 3 |Fh and Fh|electrolyte interfaces. As a benefit from this improved charge transfer, the photocurrent density obtained by Fh/Ti–Fe 2 O 3 can reach 2.32 mA cm −2 at 1.23 V versus the reversible hydrogen electrode, which is three times higher than that of Ti–Fe 2 O 3 .
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Guoxu Ni,Runye Hu,Qikai Wang,Wenwen Shi,Qiuhong Cui,Jun Yan
HF-free synthesis of FeSe₂@S-Ti₂C via Lewis acidic molten-salt etching. • Simultaneous Ti₂C termination, etching, and FeSe₂ anchoring in one step. • Strong interfacial coupling endows Ti₂C/FeSe₂ with metallic conductivity. • Ti₂C/FeSe₂ delivers high capacity, long life, and high rate for SIBs. • Synergistic Na-storage mechanism of FeSe₂@S-Ti₂C revealed by DFT and in situ EIS/DRT analyses. The development of high-performance anode materials is critical for advancing sodium-ion batteries (SIBs) toward practical applications. Herein, we report a novel FeSe 2 @S-Ti 2 C heterostructure synthesized via a safe and straightforward Lewis acidic molten salt etching strategy followed by in-situ selenization. This approach enables simultaneous etching of Ti 2 AlC MAX phase, surface termination with sulfur-containing groups, and uniform anchoring of FeSe 2 nanoparticles within the Ti 2 C MXene matrix, eliminating the need for hazardous HF or post-synthesis metal removal. The resulting heterostructure integrates multiple advantageous features: The highly conductive Ti₂C MXene framework accelerates the transport of Na + , while its structural robustness effectively accommodates the volume expansion caused by Na + deintercalation. S-containing surface terminations provide additional active sites that enhance Na + adsorption. Ultimately, the FeSe₂@S-Ti₂C anode demonstrates exceptional sodium-storage performance, characterized by a high reversible capacity of 397.6 mAh g −1 after 350 cycles at 1 A g −1 , superior rate capability (227.8 mAh g −1 at 5 A g −1 ), as well as robust full-cell performance with an initial Coulombic efficiency of 91.2% and a reversible capacity of 493.6 mAh g −1 following 500 cycles at 1 A g −1 . Density functional theory calculations further elucidate the underlying mechanism, revealing metallic conductivity, reduced Na + diffusion barrier (0.30 eV), and enhanced Na adsorption energy (−2.43 eV) in the heterostructure. This work presents a versatile and scalable strategy for constructing advanced MXene-based heterostructures, offering promising avenues for high-performance SIB anodes. Description : Lewis acidic molten salt etching enables one-pot synthesis of FeSe₂@S–Ti₂C heterostructures; the conductive MXene framework with S-terminations and interfacial coupling deliver fast Na + diffusion and robust sodium storage. Download: Download high-res image (203KB) Download: Download full-size image
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PubMed
高影响因子
Frontiers in Bioengineering and Biotechnology
·
2026
·
IF 5.8
Yuan Fan,Haiyan Yao,Junchao Wei,Yipeng Hu
Titanium (Ti) implants are widely used in bone defect repair, however, postoperative infections and insufficient osseointegration would lead to implant failure. Therefore, it is much critical and necessary to construct antibacterial and osteogenic coatings on the surface of Ti implants to improve the successful rate of operation. Herein, D-penicillamine stabilized chiral ZnO nanoparticles (D-ZnO NPs) were prepared, which were loaded on the surface of Ti implants together with BMP-2 to construct a dual functional coating with antibacterial and osteogenic properties. The in vitro results demonstrated that the coating showed excellent antibacterial ability, and the antibacterial rates against S. mutans , E. coli and S. aureus were 86%, 98%, and 76%, respectively. Additionally, the coating could effectively induce macrophage polarization towards M2 phenotype, which modulated the local immune microenvironment. Furthermore, the introduction of bone morphogenetic protein-2 (BMP-2) promoted osteogenesis, which may enhance the osseointegration of Ti implants. This study provides a novel strategy to address the challenges of Ti implants, and offer the solid theoretical foundation for expanding the clinical applications of multifunctional Ti implants materials.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Youheng Yao,Gaoxu Han,Yixuan Yao,Chuanjin Wang,Junshu Wu,Wenyuan Zhou,Yongli Li,Jinshu Wang
A TiCl 3 -based route enables H insertion and dispersed Ti sites on WO 3 photoanode. • Dispersed Ti sites favor secondary-hydroxyl activation and DHA formation. • H insertion suppresses free •OH species and mitigates DHA overoxidation. • (H,Ti)/WO 3 achieves 71.9% DHA selectivity and 264.5 mmol m −2 h −1 productivity. Selective photoelectrochemical oxidation of glycerol to dihydroxyacetone (DHA) offers a compelling strategy for integrating solar energy conversion with biomass valorization. However, efficient DHA accumulation remains challenging because two key issues are often underemphasized: the atomic level control of glycerol adsorption geometry for secondary-hydroxyl oxidation, and the suppression of radical mediated overoxidation of the formed DHA. Herein, we report a H, Ti-dual-modified WO 3 photoanode (H,Ti)/WO 3 that enables highly selective glycerol oxidation to DHA via cooperative interfacial pathway regulation. The (H,Ti)/WO 3 photoanode achieves a DHA selectivity of 71.9%—a sharp rise from 35.7% for WO 3 , and a DHA production rate of 264.5 mmol m −2 h −1 , roughly 5 times that of the unmodified counterpart. Mechanistically, highly dispersed Ti sites enhance adsorption of the secondary hydroxyl group of glycerol, directing the pathway toward DHA via two‑electron transfer. H‑insertion, in contrast, shifting hydroxyl chemistry away from free •OH mediated deep oxidation toward more surface-bound hydroxyl species and thereby suppressing DHA overoxidation. With this dual-pronged strategy, our work provides new insights into the selective formation and stable accumulation of DHA in biomass photoelectrochemical systems. Download: Download high-res image (146KB) Download: Download full-size image
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PROGRESS IN ORGANIC COATINGS
·
2026
·
IF 7.9
Yikun Huo,Liting Pan,Baoxin Wang,Hongxing Ye,Baiyi Chen,Jianhua Wu
Ti alloys are widely used in marine engineering, but their long-term performance is severely constrained by surface biofouling. Dynamic slippery surfaces offer a promising antifouling strategy; however, the rapid loss of lubricants under complex marine conditions remains a key bottleneck. Herein, we report a nanopore–low surface energy functional layer–lubricant synergistic strategy to construct a long-lasting liquid-infused antifouling interface on titanium alloys. Ordered three-dimensional nanoporous structures were first fabricated via controlled NaOH etching, providing capillary confinement for lubricant retention, followed by grafting low-surface-energy functional layers to enhance interfacial compatibility. Based on solid–liquid adhesion energy analysis, Krytox 103 was identified as the optimal lubricant for stable infusion. The resulting liquid-infused surface exhibited a significantly reduced friction coefficient (∼0.17) and maintained a high water contact angle (∼103°) after immersion in artificial seawater for 30 days. Antibacterial and anti-algal assays demonstrated adhesion inhibition efficiencies exceeding 90%, while field immersion tests in real marine environments confirmed sustained antifouling performance for up to 50 days. Mechanistic analysis reveals that the synergy between capillary locking within the nanopores and enhanced interfacial compatibility is crucial for long-term lubricant retention and effective suppression of bioadhesion. This work provides a scalable strategy for constructing durable slippery interfaces on titanium alloys and offers new insights into stabilizing lubricants using nanostructured surfaces for marine antifouling and related functional interface applications.
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