CONSTRUCTION AND BUILDING MATERIALS
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2025
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IF 8
Shaoming Yang,Yaqi Wang,Jiayi Chen,Yun Feng,Jiahui Li,Yongxin Liu,Liangpeng Zeng,Ji Zhao,Jiali Zhang
Owing to its environmental compatibility and energy conservation properties, photocathodic protection (PCP) has emerged as a promising approach for metal corrosion protection. The key to efficient PCP lies in developing semiconductor composite materials that combine excellent photoelectrochemical performance with a simple preparation process. Herein, a carbon-doped TiO 2 /Bi 2 S 3 composite (Bi 2 S 3 /C-TiO 2 ) was fabricated via a single-step, low-temperature hydrolysis strategy using NH 2 -MIL-125(Ti) as the precursor, concurrently achieving carbon doping and incorporating a narrow-bandgap semiconductor. Characterization by UV-Vis diffuse reflectance spectroscopy and photoelectrochemical testing under illumination revealed that the composite exhibits significantly enhanced visible-light absorption while effectively suppressing photogenerated charge carrier recombination. Under optimized conditions, the Bi 2 S 3 /C-TiO 2 photoanode shifted the potential of coupled 304 stainless steel (304SS) to −464 mV (vs. Ag/AgCl) under visible-light irradiation—substantially below its corrosion potential—demonstrating effective photogenerated cathodic protection for 304SS.
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JOURNAL OF MOLECULAR STRUCTURE
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2025
·
IF 4.7
Yu-Teng Zhang,Jing- Yu Sun,Jian Li,De-Sheng Wei,Wan-Yi Lan,Nan Lv,Shuang-Bao Li
This study reports one-pot microwave-assisted solvothermal synthesis of Ti-Zr bimetallic organic cages (TiZrT-BTC-α, where α denotes the actual Ti molar percentage and T represents the tetrahedral cage structure). The reaction employed zirconocene dichloride (Cp 2 ZrCl 2 , Cp = η 5 -C 5 H 5 ), titanocene dichloride (Cp 2 TiCl 2 ) and 1,3,5-benzenetricarboxylic acid (H 3 BTC) as solid precursors to form a V 4 F 4 (V = vertex and F = face) coordination tetrahedron. The presence of the characteristic Ti-O vibration band at 420 cm -1 in the FT-IR spectrum, along with the characteristic Ti 4+ band signal at 458.6 eV in the XPS spectrum, collectively demonstrates the successful incorporation of titanium into the molecular cage structure. Notably, the introduction of titanium endowed the material with visible light absorption capability and modulates its electronic structure, reducing the band gap value from 3.73 eV (ZrT-BTC) to 2.48 eV (TiZrT-BTC-7.9). The photocatalytic activities of TiZrT-BTC-α were evaluated using tetracycline hydrochloride (TC) as a target pollutant under visible light illumination. Among the series, TiZrT-BTC-7.9 demonstrated excellent photocatalytic activity, achieving 92.17% degradation efficiency for TC (20 mg/L) within 3 hours. Electron spin resonance (ESR) spectroscopy combined with radical trapping experiments identified superoxide radicals (·O 2 - ) served as the dominant reactive species. This work paves the way for developing cage-based photocatalysts with tunable optoelectronic properties.
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TRIBOLOGY LETTERS
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2025
·Vol. 73
·期 4
·1-16
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IF 3.3
Sheng Dezun,Yu Hongliang,Zhang Xiao,Zhou Xin
Reducing alloy friction to achieve ultra-low friction is a valuable approach to save energy and reduce pollution from oil use, which is a major challenge for researchers. This study introduces a successful method to achieve ultra-low friction in Ti-6Al-4 V using a hydrated lubricant composed of hydroxyethyl cellulose (HEC). And the effects of speed and concentration on lubricating were investigated. It was found that excessive sliding speeds may lead to lubricant detachment and consequent friction increase, indicating that the adsorption ability of HEC needs to be enhanced in future studies. In addition, when the concentration exceeds 5 wt%, wear loss tends to stabilize across tests with different concentrations, while the friction force increases with rising concentrations. Based on these findings, microscopic studies were conducted to investigate the mechanism of friction reduction. Notably, distinct topographic features resembling ‘valleys’ and ‘plateaus’ were identified on the wear scars in a nanoscale scope. The movement of the surfaces induces the hydrated HEC lubricant to flow from the lower valleys to the higher plateaus, suggesting elastohydrodynamic lubrication mechanisms to form robust films. The valleys serve as lubricant reservoirs, while the plateau tops support the lubricant films to prevent contacts between Ti-6Al-4 V and Si 3 N 4 . The schematic illustrations depict the microscopic mechanisms for achieving of ultra-low friction on Ti-6Al-4 V alloy.
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JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Jiacheng Xiao,Yuqing Liu,Jiarui Wang,Zexin Mo,Chenyu Liu,Zhan Lin,Dong Luo
Lithium-rich manganese-based cathode materials, represented as xLi 2 MnO 3 ·(1-x)LiMO 2 (M = Ni, Co, or Mn), exhibit high specific capacity and low cost, making them promising candidates for next-generation high-energy-density lithium-ion battery cathodes. However, the low covalency of the Li–O–Li configuration renders these cathode materials highly susceptible to irreversible oxygen release and structural evolution, leading to severe voltage and capacity degradation, which hinders their practical application. To address this issue, this study employs a Ba/Ti co-doping strategy to modulate the oxygen electron and reinforce the structure of lithium-rich manganese-based cathode materials. Post-cycling results indicate that Ti/Ba co-doping effectively suppresses electrolyte corrosion and surface/interface reactions, improves the reversibility of O-redox during cycling, and enhances the structural stability of both the bulk and surface of the materials. As a result, the Ba/Ti co-doped sample exhibits an excellent capacity retention of 95.2 % after 300 cycles.
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MATERIALS CHEMISTRY AND PHYSICS
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2025
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IF 4.7
Yuan Chen,Yelin Li,Wanjun Tang,Tingcheng Li,Qingliang You,Guangyong Xie
In the field of heterogeneous catalysis, it still remains a challenge in controlled preparation of micro-nanostructured composite oxide catalysts. In this regard, a series of urchin-like V–Ti–O micro-nanostructures with varying Ti/V molar ratios are successfully synthesized by the reaction between tetrabutyl titanate (TBOT) and vanadyl oxalate via a facile one-step solvothermal process and subsequent calcination. The influences of reaction conditions, such as the ratio of reactant, the acidity of reaction system, and the use of glycol on the morphologies and oxidation state of vanadium are investigated. The results show that urchin-like hierarchical micro-nanostructures are formed, on which a large number of one-dimensional nanobelts radially grow from the center. Vanadium oxide species are highly dispersed on the external surface of the anatase TiO 2 structure. The obtained V–Ti–O catalysts are tested for the ammoxidation of mono- and dichlorotoluenes in gas-phase with molecular oxygen and exhibit high catalytic activity in converting chlorotoluenes to corresponding nitriles.
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CRYSTAL GROWTH & DESIGN
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2025
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IF 3.4
Hongyu Wang,Fumin Wang,Kaiwei Wang,Xubin Zhang,Changhao Bing,Xiaolu Fan,Tongxue Zhang,Syed Mujtaba ul Hassan
Developing an approach for the efficient synthesis of TS-1 zeolites with desirable morphologies and tunable coordination environments for Ti active sites is a pivotal challenge in the design of high-performance catalysts and zeolite crystal engineering. Herein, we report a cost-effective and efficient additive, guanidinoacetic acid (GAA), and conduct a systematic study on the synthesis of plate-like TS-1 zeolites using GAA as an additive. Introducing GAA during hydrothermal synthesis not only modulates the morphology of TS-1 crystals but also permits GAA to adequately chemically interact with titanium precursors to form hexa-coordinated Ti species. TS-1 zeolites with a controllable b-axis thickness in the range of 80–110 nm, and abundant framework Ti and hexa-coordinated Ti species are successfully achieved by optimizing the synthetic parameters. Through SEM, FT-IR, XPS, TEM, and XRD analysis, the mechanism of GAA altering crystal growth is mainly to inhibit the growth of the (010) plane. A b-axis-oriented TS-1 zeolite enriched with hexa-coordinated Ti species displays better catalytic performance in the 1-hexene epoxidation reaction than the conventional TS-1 zeolite containing only framework Ti species (35 vs 24%). This can be ascribed to the more active hexa-coordinated Ti species and shorter diffusion distance. This synthetic strategy provides a way to change the zeolite morphology and tune the number and distribution of Ti species in TS-1 zeolites.
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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
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电化学
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能源存储
·
无机化学
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固态化学
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电池技术
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ENERGY & FUELS
·
2022
·
IF 4.654
Bingjie Wen,Nizao Kong,Min Huang,Liqin Fu,Dingbang Yan,Yexin Tian,Jinshui Liu,Ruixuan Tan,Fei Han
Despite the outstanding theoretical capacities of two-dimensional (2D) molybdenum sulfide (MoS2) with low costs, its low conductivity and easy agglomeration greatly impede the business application as anode materials. The heterostructures between 2D MoS2 and Ti3C2 MXene are able to combine the collective superiorities of MoS2 and Ti3C2, thus greatly ameliorating the electrical conductivity and rate capacity through synergistic effects. Herein, we design a simple intercalation–sulfidation strategy for the construction of the TH MoS2/Ti3C2 heterostructures with a compact stacking lamellar structure and investigate the electrochemical sodium storage properties of the composite. In the architecture, fallen leaf-like MoS2 nanosheets with a mixed-phase crystal containing 1T and 2H phases grow tightly on the surface and interlayer of Ti3C2 matrixes. The expanded layer spacing of Ti3C2 as a result of MoS2 insertion can greatly accelerate electronic/sodium ion transport. Meanwhile, 2D Ti3C2 can serve as a strong mechanical support for the composite electrode to provide a buffer space for volume expansion and avoid structural collapse during cycles. Benefiting from these structural advantages, the TH MoS2/Ti3C2 anode reveals higher sodium storage capacity of 743.6 mAh g–1 than bare MoS2 (579.4 mAh g–1) at 0.2 A g–1. Furthermore, the anode exhibits significantly improved battery rate performance with a high sodium storage capacity of 653.3, 539.1, 512.1, 488.7, 439.3, and 586.7 mAh g–1 at 0.2, 0.5, 1, 2, 5, and 0.2 A g–1. Our study provides a unique synthesis route to construct layered heterostructure composites by artificial stacking of different types of 2D materials, which are considered as highly promising electrode materials for sodium-ion batteries (SIBs).
研究领域:
材料科学
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电化学
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纳米材料
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能源存储
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无机化学
·
固态物理
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高影响因子
FUEL
·
2025
·
IF 7.5
Huanhuan Gao,Daolun Liang,Yadong Sun,Jianzhong Liu
To address space constraints in solid rocket motors, this study investigates Al–Ti, Al–Zr, and Al–Mo alloys. Their high density enhances energy release per unit volume. Multidimensional analyses—thermal oxidation behavior, ignition/combustion characteristics, and agglomeration properties—were conducted to elucidate how high-density alloys influence Al-based propellant combustion performance and energy release. Results show these high-density alloys exhibit shorter ignition delay time and combustion time, effectively increasing the propellant burning rate of propellants while reducing the pressure exponent. Titration measurements reveal combustion efficiencies of 84.28% (A), 87.33% (AT), 86.79% (AZ), and 85.91% (AM). Among them, Al–Zr demonstrates the most significant optimization effect on combustion performance. Due to the low ignition threshold, Al–Ti significantly suppresses agglomerate formation and accelerates the combustion. Meanwhile, Al–Mo enhances the transport efficiency of oxidizing gases through the phase-change sublimation mechanism of MoO 3 , indirectly boosting combustion efficiency. Furthermore, this work reveals the synergistic mechanisms by which high-density alloys optimize propellant combustion performance via multiple factors. The findings confirm the technical feasibility of simultaneously achieving superior combustion performance, high energy output, and effective agglomeration suppression, providing theoretical and technological guidance for developing advanced high-energy-density solid propellants.
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COMPUTATIONAL MATERIALS SCIENCE
·
2025
·
IF 3.3
Peipei Liu,Chunchun Dong,Xiping Chen,Xuemin Liang
Superhard ceramics are suitable materials to improve the surface characteristics of titanium. In this study, TiB 2 nanopowder was coated on titanium substrate using electrophoretic deposition in NaF-AlF 3 -Al 2 O 3 molten salts. The effects of varying deposition voltages and deposition times on TiB 2 coatings were investigated. Additionally, the microstructure of the coating surface was observed by scanning electron microscopy. With an applied cell voltage of 1.2 V and a deposition time of 1.5 h, a dense, defect-free TiB 2 /TiB composite coating (including the outer TiB 2 layer and the inner TiB whiskers layer) approximately 74 μm thick was produced, exhibiting a strong metallurgical bond to the substrate. A densely packed TiB whisker layer forms at the TiB 2 /Ti interface. The work of adhesion, interfacial energy, and electronic structure of the α-Ti(0001)/TiB 2 (0001) interfaces have been calculated using first-principles methods. Simultaneously, the diffusion of B atoms at the TiB 2 /Ti interface was computed to explain the formation process of TiB whisker layers. The work of adhesion calculations indicated that the B-HCP-Ti interfacial model exhibited the highest interfacial bond strength. The electronic structure of the interfacial model was analyzed to show that the Ti-terminated interface model was primarily formed through metallic bonds, while the B-terminated interface model was primarily formed through covalent bonds. Compared to the Ti-terminated interface, the B-terminated interface facilitates the diffusion of boron from TiB 2 into the titanium substrate more effectively.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2014
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IF 2.726
Wei Cai,Chunlin Fu,Rongli Gao,Weihai Jiang,Xiaoling Deng,Gang Chen
Ti-doped bismuth ferrite thin films were prepared via sol–gel spin-coating method. The effects of titanium on the microstructure, optical, leakage, ferroelectric and photovoltaic characteristics have been investigated systematically. The result shows that bismuth ferrite thin films doped with 0–8 at.% Ti are rhombohedral distortion perovskite structure. The addition of titanium inhibits the grain growth and enhances the thickness uniformity and can decrease the band gap of bismuth ferrite thin films. The leakage current of bismuth ferrite thin films is effectively reduced by adding a certain amount of titanium and the leakage mechanism has been investigated. Addition of titanium increases the remnant polarization of the films. As titanium content increases, the short circuit photocurrent density decrease first and then increase, while the open circuit photovoltage increase first and then decrease. The power conversion efficiency of Ti-doped bismuth ferrite thin films increases as titanium content increases, which can be explained as a result of the increased remnant polarization and decreased band gap.
研究领域:
材料科学
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光伏技术
·
物理学
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 16
·7810-7818
·
IF 3.3
Yanke Guo,Qiaoyun Qin,Jing Zhu,Baohe Wang
Propylene glycol methyl ether was directly synthesized from propylene and hydrogen peroxide under mild conditions via aluminum modified titanium silicalite-1 as a bifunctional catalyst. It has both active sites capable of epoxidation and active sites capable of ring opening reactions, thus realizing the one-pot preparation of propylene glycol methyl ether by propylene. The synergistic effect of Ti–Al on the catalytic performance and the distribution of propylene glycol methyl ether isomer were investigated in detail, and the synergistic catalysis between the two active sites was characterized. The gradual introduction of aluminum reduced the activation ability for hydrogen peroxide, but gradually increased the selectivity for propylene glycol methyl ether. Under the optimum conditions, the selectivity for propylene glycol methyl ether reached 91.53%. Combined with Density Functional Theory (DFT) calculations, the synergistic catalytic effect of doped Al and framework Ti in titanium silicalite-1 is discussed in detail from a microscopic perspective. Al increases the Lewis acid strength of Ti active sites and promotes the conversion of propylene to propylene oxide (PO), and simultaneously Ti increases the Brønsted acid strength of Al active sites and promotes the conversion of propylene oxide to propylene glycol ether.
研究领域:
化学工程
·
催化科学
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危险品化学品经营许可证（带存储）