ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Shuangchao Sheng,Zheng Zhang,Meng Wang,Xin He,Caiyun Jiang,Yuping Wang
Because of the tenacious vitality of tetracycline, it would also cause toxic effects on surface water at low concentrations. Therefore, it was critical to design the material as a platform with specific selective sensing functions and promote removal. A MIL-125(Ti)-derived cake-like TiO 2 with recognition sites (MT450) were successfully compounded by a simple mixed-solvent thermal method and using calcination method. MT450 not only inherited the large specific surface area of MIL-125(Ti), but also had excellent photoelectrochemical properties and introduced numerous recognition sites to give it the ability to quickly and specifically recognize and bind antibiotics, and improved the selectivity and sensitivity of photoelectrochemical detection effect. The results showed that MT450/ITO modified electrode was explored as novel photoelectrochemical sensor, which presented remarkable performance for tetracycline detection in a wide linear range from 0.005 to 50 μM and the LOD was estimated as 2.83 nM. Because the imprinted cavity made the affinity between tetracycline and MT450 greater, and was profit to the opening of the electron/hole transfer channel. The proposed strategy showed that the Ti-MOFs derived material with imprinted cavities can be evaluated the selective detection of photoelectrochemistry. Furthermore, the selective effects of the molecularly imprinted materials were evaluated by photocatalytic degradation of pollutants experiment.
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CHEMOSPHERE
·
2022
·
IF 8.943
Cheng Cheng,Dongyun Chen,Najun Li,Hua Li,Qingfeng Xu,Jinhui He,Jianmei Lu
This paper reports the application of NH 2 -MIL-125(Ti) modified carbon nitride C v -C 3 N 4 with carbon vacancies in the removal of NO. We performed a series of characterizations of the complex and compared various ratios with the individual components. The results of UV spectrum analysis show that the composite's range of light absorption expanded due to the modification of Ti metal–organic framework. Furthermore, the results of photocurrent and electrical impedance indicate the compound has a better ability to generate and transfer electrons . The increase in the compound's NO removal efficiency (up to 63%) indicates that MOF has a positive effect on C v -C 3 N 4 modification—a good method for photocatalysis . Moreover, the compound can promote photocatalysis in a favorable direction.
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Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 38
·21766-21773
·
IF 10.733
Shixue Zhang,Huan Liu,Bin Cao,Qizhen Zhu,Peng Zhang,Xin Zhang,Renjie Chen,Feng Wu,Bin Xu
Two-dimensional transition metal carbides (MXenes) have a unique structure, excellent electronic conductivity and a low Li+ diffusion barrier, and show potential for application in energy storage. Especially, MXenes can act as a conductive matrix to achieve excellent lithium storage performance. Herein, a Ti3C2Tx MXene/carbon nanotubes@red phosphorus (Ti3C2Tx/CNTs@P) nanohybrid with stable Ti–O–P bonds is fabricated. The CNTs are introduced into Ti3C2Tx to construct a conductive network, and then the Ti3C2Tx/CNTs are combined with P by a ball-milling method. In this process, the surface oxygen-containing functional groups of Ti3C2Tx interact with P, forming Ti–O–P bonds. Owing to the large capacity contribution of P, the conductive network and buffering role of Ti3C2Tx/CNTs, and the effect of the Ti–O–P bond, the Ti3C2Tx/CNTs@P nanohybrid exhibits a superior reversible capacity of 2598 mA h g−1 at 0.05C (1C = 2600 mA g−1, based on the active material P), excellent cycling stability (2078 mA h g−1 after 500 cycles) and superior rate capability (454 mA h g−1 at 30C). These results demonstrate that the Ti3C2Tx/CNTs@P nanohybrid offers fascinating potential for high-performance lithium-ion batteries.
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Journal of Water Process Engineering
·
2025
·
IF 6.7
Longjiao Lv,Huihao Luo,Guocheng Zhu
Metal-phenolic networks, despite their good ammonia nitrogen adsorption properties, have suffered from poor acid resistance and high oxidability in the past thus leading to ineffective treatment and the possible conversion of ammonia nitrogen into nitrate nitrogen. Research on the adsorption of ammonia nitrogen by titanium tannate (Ti-TA), which exhibits good resistance to ammonia nitrogen oxidation, is still unclear. A batch experiment was conducted to investigate the structural characteristics of Ti-TA, as well as its adsorption behaviors. Among them, advanced technologies such as Scanning Electron Microscopy, Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller, X-ray diffraction, and X-ray photoelectron spectroscopy, were used for this investigation. The results showed that Ti-TA, prepared with a molar ratio of tannic acid to tetrabutyl titanate of 1:5 at a solution pH of 7, was able to form a rough surface and a microporous structure with a specific surface area up to 356.9 m 2 /g. The parameters, affecting the adsorption results, included pH and adsorbent dose, where lower adsorbent doses resulted in higher adsorption capacities, reaching up to 4.175 mg/g, and neutral to weakly acidic conditions were conducive to the adsorption process. For example, when the initial NH 4 + -N concentration was 28.45 mg/L, and the ratio of tannic acid to Ti was 1.5, the removal rate of ammonia nitrogen can exceed 95.78 % within a pH range of 6–7. The primary mechanisms underlying physicochemical adsorption involve electrostatic interaction between oxygen ions and NH 4 + -N, as well as hydrogen bonding. The adsorption process occurred spontaneously, following Pseudo-second-order kinetics and adhering to the Freundlich isotherm model, with a relatively low adsorption index (1/ n < 0.5). For the first time, the findings of this study reveal the adsorption behaviors of Ti-TA and propose optimal preparation conditions, underscoring its significant potential for applications in nitrogen pollution treatment.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Liangcai Du,Qianqian Kong,Lichao Gong,Huachen Liu,Song Huang,Yunqi Xie,Zhenhua Yao
High entropy alloys (HEAs) exhibit distinctive core effects and excellent properties, presenting promising prospects for various applications, particularly as potential cermet adhesives. (Ti,W)C-HEA cermets were synthesized using vacuum sintering, employing mechanically alloyed CoCrFeNiTi HEA powder as a binder. The microstructure and mechanical properties of the produced cermets were systematically analyzed, with a particular focus on the effect of the HEA binder on the mechanical properties of the cermets. The findings indicated a decreasing trend in relative density, Rockwell hardness, and transverse rupture strength (TRS) of the cermets. Notably, the CM1 group ((Ti,W)C-30 wt% Co 20 Cr 20 Fe 20 Ni 35 Ti 5 ) demonstrated the most favorable overall properties, with values of 97.0 % for relative density, 83.2 HRA for Rockwell hardness, and 776.6 MPa for TRS. The phase transformation of HEAs at elevated temperatures was meticulously investigated using differential scanning calorimetry (DSC) and heat treatment. Combined with X-ray diffraction (XRD), the phase transformation of Co 20 Cr 20 Fe 20 Ni 25 Ti 15 and Co 20 Cr 20 Fe 20 Ni 15 Ti 25 , heat treated at increasing temperatures, is as follows: FCC + BCC (milled) → FCC + σ (700°C–1100 °C) → FCC (bulk).
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Materials Research Express
·
2019
·Vol. 6
·期 8
·086472
·
IF 1.449
Zhengjun Shen,Yannan Zhang,Xiaohua Yu
The interfacial microstructure of an Al-based coating on a Ti alloy surface has been designed by using phase diagrams and advanced first-principles calculations. Samples were characterized by x-ray diffractometry, scanning electron microscopy, optical microscopy, high resolution transmission electron microscopy and energy-dispersive spectrometry. The results show that the stability sequence of the Ti–Al intermetallics was Ti3Al > TiAl > TiAl2 > TiAl3. The TiAl3 transition layer with a strong self-healing property was obtained easily by metallurgical reaction of Al and Ti. The Al atoms in TiAl3 combined rapidly with the O atoms to form a new Al2O3 protective layer in air. This work provides theoretical support for the thermal processing of Ti alloys.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2021
·Vol. 127
·期 10
·1-9
·
IF 2.584
Meng Ke,Li Wenhua,Tang Xingui,Guo Xiaobin,Liu Qiuxiang,Jiang Yanping
Ferroelectric materials with the typical perovskite structure are widely used in capacitors, ultrasonic devices, oil drilling, transducers, and other fields. Lead-lanthanum-zirconium-titanate ceramics co-doped with Sn and Ba , have been widely investigated. However, there is little attention has been focused on the dielectric properties of barium-lanthanum-zirconium-titanate. Thus, in this work, Sn doped Ba 0.955 La 0.03 Zr 0.02 Ti 0.98 O 3 ferroelectric ceramics were prepared via a classical high-temperature solid state reaction. Scanning Electron Microscopy (SEM) was used to observe the surface appearance of ceramics. The X-ray diffraction (XRD) patterns at room temperature, indicate that the ceramics are well crystallized. Impedance properties and dielectric properties reflect the characteristic of typical high temperature dielectric relaxation behavior. The conductive activation energy and the relaxation activation energy are obtained through the calculation of the Arrhenius law. The fitting results show that the dielectric relaxation behavior at high-temperature, was related to the oxygen defect. The electrical modulus verified the partial short-range carrier migration, also contribute to the high-temperature dielectric properties.
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ELECTROCHIMICA ACTA
·
2014
·
IF 4.086
Xiaolin Li,Xueming Li,Wenjing Yang,Xiaohua Chen,Wulin Li,Binbin Luo,Kuilong Wang
The PbO 2 nanospheres supported on SnO 2 nanowires at Ti substrate (PbO 2 nanospheres@SnO 2 NWs/Ti) electrode was successfully synthesized through hydrothermal method. The structure and morphology of the electrode were studied by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The electrochemical property was carried out by cyclic voltammogrametry (CV) and UV spectroscopy was used to monitor the changes during the electrochemical degradation process. The results showed that the as-prepared electrode exhibited a three-dimensional (3D) reticulated structure with a large surface area. The average diameter of a single PbO 2 nanosphere is about 300 nm. XRD distinctively identified that the PbO 2 nanospheres was mainly composed of tetragonal-shaped β-PbO 2 crystal. The CV results show that methyl orange (MO) can be oxidized on the electrode surface at the potential of +1.3 V vs. Ag/AgCl. As much as 92.7% of chemical oxygen demand (COD) was removed in 60 min at 25 °C and pH 5.0 with an applied current density of 15 mA/cm 2 . Proper degradation mechanism was also proposed.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Pengcheng Yin,Yucheng Yang,Shu Zhang,Zhao Hu,Dawei Li,Feihu Li
The potential of capacitive deionization (CDI) for sustainable desalination depends critically on breakthroughs in electrode materials. Defect-rich titanium (sub) oxides (anatase TiO₂(A), Ti₂O₃, Ti₃O₅, Ti₄O₇) offer compelling advantages, including tunable capacity, low environmental impact, and robustness. This study provides a systematic comparison of their structural features, electrochemical responses, and desalination efficacy. Electrochemical characterization results show anatase TiO₂(A) leads in specific capacitance (252.5 F g −1 at 0.3 A g −1 ), while Ti₃O₅’s highest oxygen vacancy minimizes charge transfer resistance and maximizes ion migration rates. In desalination trials, TiO₂ delivers a maximum salt adsorption capacity of 37.1 mg g −1 (500 mg L −1 NaCl, 1.2 V). All electrodes exhibit outstanding cycling stability (capacity retentions >83.5 %), affirming their practical potential. Correlation analysis discloses the oxygen vacancy-driven charge transfer mechanism inside these electrodes and establishes a structure-performance relationship. Overall, this work establishes fundamental structure-property relationships that underpin future electrode innovation via the oxygen vacancy-engineering strategy, which represents a promising pathway for advancing CDI performance boundaries.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2025
·
IF 14.3
Hongxiang Chen,Zhilong Zhang,Xiaochun Wen,Ze Zhang,Fa Chang,Jianeng Huang,Yunfeng Su,Hengzhong Fan,Bing Xiao,Yongsheng Zhang
The discovery of out-of-plane ordered (o-MAX) phases has been largely confined to Al-containing systems, leaving a critical gap in understanding chemical ordering mechanisms across other A-element families. Meanwhile, the 413-type Ge-based MAX phases in bulk form are still lacking. Here, we report the first synthesis of bulk Ge-based 413-type MAX phases: Cr 2 Ti 2 GeC 3 , (Cr 1/3 Ti 1/3 Mo 1/3 ) 4 GeC 3 , and (CrTiVMo)GeC 3 , thereby expanding both structural complexity and chemical ordering paradigms in nanolaminate ceramics, and introducing the second series of o-MAX phases. Through combined Rietveld refinement and atomic-resolution elemental mapping, we demonstrate robust Ti-Cr out-of-plane chemical ordering in these phases, with Ti preferentially occupying the inner metal layers adjacent to Ge atoms and Cr populating the outer layers. This chemical ordering pattern is preserved even in quaternary metal compositions. In contrast, the introduced Mo and V are distributed almost randomly at both sites. First-principles calculations demonstrated the thermodynamic stability and electronic structure, and quantified the mechanical properties of Ge-based 413 phases, revealing enhanced mechanical moduli and tunable ductility through V/Mo incorporation. This work expands the o-MAX family beyond Al-based systems, establishing Ge-containing high- n phases as a platform for designing chemically ordered nanolaminates with tailored stiffness-ductility balance.
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RSC Advances
·
2024
·Vol. 14
·期 8
·5142-5148
·
IF 3.9
Chunhong Jin,Jingchao Liu,Yilin Yin,Zenghe Li
In wastewater containing heavy metals, Cr(VI) is a potentially toxic metal, mainly derived from production and processing processes such as textile printing, dyeing, ore mining, battery applications, metal cleaning and electroplating. WO3 is widely used in photocatalytic degradation and reduction, and its utilization rate of visible light is high. However, the rapid recombination of photogenerated electron–hole pairs of WO3 limits its use. In this work, the composite material (WxMy) of WO3 and MIL-125 (Ti) was prepared by the ball milling method, and the catalyst was used to photocatalytically reduce Cr(VI). After using W90M10 as a photocatalyst for 50 min, the reduction rate of Cr(VI) can reach 99.2%, and the reduction rate is 2.3 times that of WO3. After 5 cycles of use, the reduction rate can still reach 91.3%. It is mainly due to the formation of a II-type heterojunction between WO3 and MIL-125 (Ti), which promotes the separation of photogenerated electron–hole pairs, thus improving the efficiency of photocatalytic reduction of Cr(VI).
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PubMed
高影响因子
NANOTECHNOLOGY
·
2024
·Vol. 35
·期 42
·425702
·
IF 2.9
Rui Li,Huilin Hu,Furong Xiong,Xiang Xue,Minqi Wu,Xuan Zuo,Wang Zhang,Xiangliang Pan
Efficient metal–organic frameworks (MOFs) photocatalytic bactericidal catalysts are urgently needed in water purification. Herein, a Fe-MOF (MIL-88B-NH2(V1Fe5) with promoted electron transport was achieved by vanadium (V) ions doping and V/Fe ratio optimization, showing excellent photocatalytic bactericidal activity against E. coli under visible light irradiation (99.92%). The efficient antibacterial mechanism, V as a Ti-like mediator boosting electronic transmission in MIL-88B-NH2(V1Fe5), was revealed by its band structure, transient photocurrent, electrochemical impedance spectroscopy, and scavenger quenching experiments. The enhancement of photocatalytic bactericidal performance of Fe-MOFs by V–ion-doping was confirmed by two other Fe-MOFs, MIL-53-NH2(V1Fe5) and MIL-101-NH2(V1Fe5), with the same metal ions and ligands, both of which have higher performance than the corresponding undoped MOFs. Among them, MIL-88B-NH2(V1Fe5) exhibits the highest photocatalytic bactericidal activity due to its suitable metal clusters ([M(μ3-O)] cluster) and topological structure (three-dimensional rhomboid network structure). This work demonstrated the amplification effect of V ion doping on electron transport in Fe-MOFs photocatalysts.
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