Sensors and Actuators Reports
·
2024
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IF 6.5
Zhiming Chen,Zhiwen Shi,Peng Zhang,Li Gao,Bingxin Liu,Lijuan Qiao
The presence of ammonia in exhaled human breath serves as a crucial biomarker for renal diseases. This paper presents a highly sensitive ammonia sensor operable at room temperature, utilizing a Ti/Zr dual metal MOF as its core component, synthesized through a straightforward solvothermal reaction approach. The Ti/Zr-MOF demonstrates excellent responsiveness to ammonia gas, with a detection limit of remarkable sensitivity, reaching as low as 2 ppm. Notably, the sensor exhibits practical insensitivity to similar concentrations of other major interfering breath volatiles, including acetone, ethanol, and saturated moisture. Electron Paramagnetic Resonance (EPR) analysis confirms the presence of oxygen vacancies (Ov) in Ti/Zr-MOF materials, with Ti/Zr-MOF exhibiting stronger Ov signals and the potential for enhanced NH3 adsorption and capture. In-situ FTIR spectrum analysis reveals ammonia-induced -OH (H 2 O) moiety formation, indicating a reaction between adsorbed O 2 − species and ammonia, resulting in decreased electrical resistance of Ti/Zr-MOF.
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高影响因子
RARE METALS
·
2025
·
IF 11
Wei He-He,Zhang Xin-Xin,Sun Si-Wei,Gai Shi-Li,Yu Hai-Tao,Xie Ying
Transition metal phosphides (TMPs), with tunable electronic structures and diverse compositions, are promising candidates for electrocatalytic water splitting. However, their unsatisfactory electrical conductivity and tendency to aggregate during reactions result in structural instability, ultimately hindering further improvement of their electrocatalytic performance. To address these issues, a bamboo-leaf-like FeCoP/MXene heterojunction was synthesized by hydrothermal and thermal treatments, utilizing highly conductive MXene as the substrate. Density functional theory (DFT) calculations and experimental characterization reveal that strong Ti–O–Co/Fe covalent bond are formed between MXene and FeCoP through hybridization of O 2p and Co/Fe 3d orbitals, which enhance the structural stability of the interface and facilitate the effective anchoring of FeCoP on the MXene surface. Consequently, the structural stability and electrical conductivity of the catalyst are improved simultaneously. Additionally, interfacial charge redistribution optimizes the Gibbs free energy of hydrogen adsorption at the Co, Fe, and Ti sites while promoting the adsorption and activation of water molecules. These factors interact synergistically, leading to enhanced bi-functional electrocatalytic performance for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). In a FeCoP/MXene (+||−) two-electrode system, the catalyst achieves a current density of 10 mA cm –2 at a potential of 1.5 V, which is superior to the RuO 2 (+)||Pt/C (−) system. The assembled water splitting device exhibits long-term stability for up to 100 h at a current density of 100 mA cm –2 . Furthermore, an anion exchange membrane water electrolyzer (AEMWE) equipped with FeCoP/MXene as both anode and cathode achieves an industrial-grade current density of 500 mA cm –2 at 1.83 V. These results highlight the critical role of interfacial engineering in enhancing the electrocatalytic performance of TMPs for water splitting and provide valuable insights for the design of novel bifunctional TMP catalysts. Graphical abstract
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
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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
LANGMUIR
·
2025
·
IF 3.9
Haiqing Liu,Muhammad Jawad,Jingmao Zhao,Baomin Fan,Mohammad Tabish,Muhammad Mubeen,Mubashar Mahmood,Jingbao Wang
Under-film filiform corrosion (FFC) poses a significant challenge to the durability and reliability of Zn–Al–Mg-coated steel (ZM-steel), necessitating the development of advanced protective strategies. Herein, benzotriazole 5-carboxylic acid (BTC)-modified titanium zirconium (TiZr) conversion coatings (CCs) were developed as a sustainable solution to mitigate FFC, enhance corrosion resistance, and improve the adhesion of epoxy (EP) coatings on ZM-steel. Through electrochemical impedance spectroscopy, potentiodynamic polarization, FFC, and neutral salt spray (NSS) tests, the optimized BTC-TiZr CC, prepared in a Ti–Zr solution containing 0.5 g/L BTC, a treatment temperature of 25 °C, and a short immersion duration of 120 s, exhibited superior corrosion resistance, robust adhesion strength, and exceptional FFC inhibition. Metal–organic complexes (MOCs) of Ti/Zr/Zn with BTC were identified alongside mixed Ti/Zr/Zn/Al/Mg oxides and fluorides within the BTC-TiZr CC. BTC not only exerted strong corrosion inhibition efficacy for ZM-steel but also facilitated the formation of MOCs with metal ions in TiZr conversion solutions (CSs). Density functional theory calculations revealed that BTC preferentially adsorbs onto the MgZn2 phase, effectively suppressing its dissolution within the ZM layer. These findings establish BTC-TiZr CCs as a promising, environmentally friendly solution for advanced corrosion protection of ZM-steel, especially FFC suppression.
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PubMed
高影响因子
CARBON
·
2025
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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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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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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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APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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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
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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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Energy Storage Materials
·
2021
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IF 17.789
Linlin Ma,Li-Juan Yu,Jingchong Liu,Ya-Qiong Su,Shuai Li,Xiaohuan Zang,Tao Meng,Shuaihua Zhang,Jianjun Song,Jiangyan Wang,Xiaoxian Zhao,Zhimin Cui,Nü Wang,Yong Zhao
As the desired sulfur host of lithium-sulfur battery, the strong polarity and fast electron migration capability are indispensable for achieving effective adsorption and conversion of lithium polysulfides (LiPSs), that is, restricting the shuttle effect. Herein a porous microdisk Ti 4 O 7 /TiN/C heterojunction with strong polar N-Ti-O covalent bonds is precisely constructed. Compared with O-Ti-O or N-Ti-N bond in single Ti 4 O 7 or TiN , the N-Ti-O bond with stronger polarity could adsorb and bond with S and Li atoms in LiPSs, which is beneficial for LiPSs adsorption. Beside, the Ti 4 O 7 /TiN heterostructure favors the electron transfer , which could promote the conversion of LiPSs. The design strategy is to construct abundant polar N-Ti-O bonds at Ti 4 O 7 /TiN heterogeneous interface that would realize the associative process of LiPSs adsorption, trapping, and conversion, thereby restraining the shuttle effect efficiently. In the current study, as the host of the sulfur cathode, the porous microdisk TiN/Ti 4 O 7 /C heterojunction exhibits a high specific capacity of 1204.5 mAh g −1 at 0.2 C, and a high specific capacity of 616.5 mAh g −1 at an ultrahigh current density of 4 C. In addition, 86.4% and 116.9% capacity are retained over 1000 cycles at 1 C and 2 C, respectively. This strategy provides an insight into developing lithium-sulfur battery with extraordinary performance, and opens promising routes to design the next-generation electrochemical energy storage devices.
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CERAMICS INTERNATIONAL
·
2024
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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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JOURNAL OF SEPARATION SCIENCE
·
2022
·Vol. 45
·期 19
·3754-3762
·
IF 3.614
Zixin Chi,Xi Wu,Qiqi Zhang,Fengyang Zhai,Zesheng Xu,Dandan Zhang,Qing Chen
Titanium-based metal-organic framework MIL-125(Ti) was synthesized by the hydrothermal method of terephthalic acid and tetra butyl titanate in N-N ,dimethylformamide, and methanol. MIL-125(Ti) was characterized by Fourier-transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, nitrogen adsorption-desorption, energy-dispersive X-ray spectroscopy, zeta potential, scanning electron microscope, and transmission electron microscopy. The results showed MIL-125(Ti) could be used as a potential adsorbent for protein separation and purification due to the high specific surface area, high stability, and strong hydrophobicity. As a result, MIL-125(Ti) had adsorption selectivity for immunoglobulin G, which was due to the hydrogen bond between MIL-125(Ti) and protein. At pH 8.0, the maximum adsorption efficiency of 0.25 mg MIL-125(Ti) for 300 μL 100 μg/mL immunoglobulin G was 98.3%, and its maximum adsorption capacity was 232.56 mg/g. The elution efficiency of immunoglobulin G was 92.4% by 0.1% sodium dodecyl sulfate. sodium dodecyl sulfate-polyacrylamide gel electrophoresis result demonstrated the successful isolation of highly purified immunoglobulin G from the human serum. Therefore, a new method of separation and purification of immunoglobulin G in human serum using titanium-based metal-organic framework MIL-125(Ti) as a solid-phase adsorbent was established, which broadened the application scope of metal-organic frameworks.
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高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Jingxin Tian,Hongjun Zhang,Liwei Zhang,Dongliang Wang,Yong Huang,Elena Balashova,Boris Krichevtsov,Hua Ke
The effects of oxygen vacancies on electric properties of high valence ions (Mo/Zr/Ti) doped Bi 0.85 Nd 0.15 FeO 3 (marked as BNFM, BNFZ, BNFT) ceramics with morphotropic phase boundary (MPB) are investigated. MPB structures consisting of rhombohedral, intermediate and orthorhombic phases exist in all samples, which is confirmed by the XRD Rietveld refinements and TEM analyses. The BNFT has the maximum remnant polarization of 34.5 μC/cm 2 at 180 kV/cm, owing to its lowest paraelectric orthorhombic phase content. XPS and impedance results reveal that the BNFT ceramic has the relatively low oxygen vacancy contents and the largest impedance value, which is beneficial for the ferroelectric test. The best comprehensive properties of BNFT open wide prospects for improving BiFeO 3 -based ceramics.
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