SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Huijiao Wang,Zhongyi Li,Fengyuan Zhang,Yuxiang Wang,Xian Zhang,Jianbing Wang,Xuwen He
Three types of Magnéli phase anodes (Ti/Ti 4 O 7 , Ti/Ti 4 O 7 -PbO 2 -Ce, and Ti/Ti 4 O 7 nanotube arrays (NTA)) were fabricated, characterized, and compared with other typical active and non-active anodes (i.e., BDD, Ti/Pt, Ti/RuO 2 -IrO 2 , and Ti/IrO 2 -Ta 2 O 5 ) for electro-oxidation treatment of p -nitrophenol (PNP) solution and a real coal chemical concentrated brine in this study. Characterization results indicate a nanotube array structure of Ti/Ti 4 O 7 NTA, and a compact coating of Ti 4 O 7 microparticles and PbO 2 -Ce nanocrystals on the Ti substrate for Ti/Ti 4 O 7 and Ti/Ti 4 O 7 -PbO 2 -Ce, respectively. The three anodes present relatively high oxygen evolution potentials (2.16–2.44 V vs SCE), showing good capacity of electro-generating reactive oxidative species for pollutant degradation. After 30 min of EO treatment, Ti/Ti 4 O 7 NTA and Ti/Ti 4 O 7 removed 89–92% of PNP, which were 10–60% higher than Ti/Pt, Ti/RuO 2 -IrO 2 , and Ti/IrO 2 -Ta 2 O 5 , and were almost comparable with BDD (95%). Furthermore, Ti/Ti 4 O 7 NTA and Ti/Ti 4 O 7 kept very efficient for mineralization of PNP solution and real coal chemical concentrated brine. For Ti/Ti 4 O 7 -PbO 2 -Ce, its degradation efficiency was lower than other two Magnéli phase anodes, but still competitive compared with other active anodes. Thanks to their high removal efficiencies, the three Magnéli phase anodes required relatively low energy demand for pollutant mineralization. Besides, operational parameters such as electrolyte and current density were also very significant for efficient pollutant removal. The results of this study suggest Magnéli phase electrodes as promising and cost-effective anode materials for industrial wastewater treatment, with Ti/Ti 4 O 7 NTA and Ti/Ti 4 O 7 being more efficient options.
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高影响因子
MOLECULES
·
2023
·Vol. 28
·期 5
·2189
·
IF 4.6
Yunqing Zhu,Bingqing Li,Yongming Wang,Tian Wang
Electrocatalytic oxidation (ECO) has attracted attention because of its high efficiency and environmental friendliness in water treatment. The preparation of anodes with high catalytic activity and long service lifetimes is a core part of electrocatalytic oxidation technology. Here, porous Ti/RuO2-IrO2@Pt, Ti/RuO2-TiO2@Pt, and Ti/Y2O3-RuO2-TiO2@Pt anodes were fabricated by means of modified micro-emulsion and vacuum impregnation methods with high porosity titanium plates as substrates. The scanning electron microscopy (SEM) images showed that RuO2-IrO2@Pt, RuO2-TiO2@Pt, and Y2O3-RuO2-TiO2@Pt nanoparticles were coated on the inner surface of the as-prepared anodes to form the active layer. Electrochemical analysis revealed that the high porosity substrate could result in a large electrochemically active area, and a long service life (60 h at 2 A cm−2current density, 1 mol L−1H2SO4as the electrolyte, and 40 °C). The degradation experiments conducted on tetracycline hydrochloride (TC) showed that the porous Ti/Y2O3-RuO2-TiO2@Pt had the highest degradation efficiency for tetracycline, reaching 100% removal in 10 min with the lowest energy consumption of 167 kWh kg−1TOC. The reaction was consistent with the pseudo-primary kinetics results with a k value of 0.5480 mol L−1s−1, which was 16 times higher than that of the commercial Ti/RuO2-IrO2electrode. The fluorospectrophotometry studies verified that the degradation and mineralization of tetracycline were mainly ascribed to the •OH generated in the electrocatalytic oxidation process. This study thus presents a series of alternative anodes for future industrial wastewater treatment.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 22
·19578-19587
·
IF 2.324
Liu Chuanmei,Xu Jiangtao,Liu Zhengqin,Ning Xin,Jiang Shouxiang,Miao Dagang
In this study Ti/Ag/Ti tri-layer and Ti–Ag alloy films were deposited on the surfaces of polyethylene terephthalate (PET) fabrics by multi-target magnetron sputtering system to fabricate highly electro-conductive textiles. Before sputtering, the fabric was treated by polyacrylic acid ester (PA) to form a continuous surface on the surface of PET fabric by padding method. The as-fabricated fabrics were characterized by scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectrometer. And the physical properties of the coated fabrics were evaluated by electrical conductivity, contact angle (CA), flexibility and adhesion. At last, a simple electric circuit was made with the as-treated fabric to evaluate the electrical property and explore its application further. The results of the study revealed that pretreatment with PA could form a continuous film on the surface of PET fabric. The PA-coated PET fabric with Ti/Ag/Ti fabric exhibited excellent electrical property whose electrical resistivity was only 5.1 × 10 −7 Ω m, CA of 137°. The PA-coated PET fabric with Ti–Ag alloy film exhibited a rather lower electrical resistivity of 3.4 × 10 −7 Ω m, CA of about 130°. Moreover, the samples retain ideal flexibility and adhesion. Therefore this study can broaden the application area of magnetron sputtering on discontinuous surface to fabricate electrical conductive fabric. And due to the excellent electro-conductivity, this kind of fabric will be a promising material for smart textiles.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Handong Jiao,Jianxun Song
Owing to the enhanced selective depolarization effect of the liquid Cu, Ti has been successfully collected from mixed oxide ores or slags by using advanced molten oxide electrolysis (MOE) configuring with a liquid Cu cathode. However, the products prepared via above process are Cu-Ti alloys. Additional process is needed for the separation of Ti from those alloys. To achieve this goal, here, we selected a simple electrochemical approach to separate Ti from the Cu-Ti alloys in molten salt. Compared to the pure Cu electrode, the Cu-Ti alloys with different Ti contents show more negative electro-oxidation potential, which, in principle, indicates that Ti could be electrochemically extracted from the Cu-Ti alloys. Furthermore, the results of constant current electrolysis show that the effective separation of Ti is affected by the anodic current density and the Ti content in the Cu-Ti alloys. Specifically, the anodic current density, enabling the effective separation of Ti, increases with the increase of the Ti content in the Cu-Ti alloys. We have fitted a relationship equation between the anodic current density and the Ti content, which will be helpful for guiding separation of Ti from the Cu-Ti alloys. These findings confirm the feasibility of the molten salt electrolysis for the separation of Ti, and also make the Ti extraction based on the advanced MOE a complete process.
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高影响因子
RARE METALS
·
2024
·Vol. 43
·期 6
·2671-2681
·
IF 9.6
Ren Zhuang-He,Zhang Xin,Zhang Wen-Xuan,Huang Zhen-Guo,Yang Li-Mei,Yang Ya-Xiong,Li Zheng-Long,Li Juan,Sun Wen-Ping,Gao Ming-Xia,Pan Hong-Ge,Liu Yong-Feng
Ti-based catalysts are known to improve the hydrogen storage performance of NaAlH 4 by facilitating the dissociation/recombination of H–H and Al–H bonds. The catalytic activity of metallic Ti species strongly depends on its particle size and dispersity. Ti clusters and even single atoms are therefore highly desirable, but their controllable fabrication has been highly challenging. Herein, we demonstrate a novel facile sonochemical synthesis of a Ti–O clusters featuring single Ti atom catalyst at room temperature. Through reducing TiCl 4 by MgBu 2 with ultrasound instead of heating as driving force, numerous single Ti atoms coupled with Ti–O clusters with Ti loading on graphene (Ti 1 /Ti–O@G) up to 22.6 wt% have been successfully obtained. The prepared Ti 1 /Ti–O@G contributes high reactivity and superior catalytic activity, therefore enabling full dehydrogenation of NaAlH 4 at 80 °C in thermogravimetric mode and re-hydrogenation at 30 °C and 10 MPa with 4.9 wt% H 2 . This fact indicates for the first time that single Ti atom catalyst with high loading is highly effective in catalyzing hydrogen cycling of NaAlH 4 at remarkably reduced temperatures. Graphical abstract
研究领域:
材料化学
·
能源化学
·
纳米催化
·
储氢材料
·
无机合成
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高影响因子
MINERALS ENGINEERING
·
2025
·
IF 5
Yubo Ge,Hualing Zhao,Guiqing Zhang,Qinggang Li,Shengxi Wu,Zhiyong Gao
In previous work, we developed an H 2 SO 4 -Fe 2 (SO 4 ) 3 roasting and water leaching method to leach rare earth elements (REEs), niobium (Nb), and titanium (Ti) from a low-grade concentrate mixture of the Baerzhe ore deposit in China ( Ge et al., 2024 ). However, conventional chemical precipitation and fluorine-ligand extraction methods for separating REEs/Nb/Ti in the leach solution face challenges, including co-precipitation of REEs and Nb/Ti, low recovery efficiency, and significant environmental concerns. To address these issues, a novel two-step solvent extraction process for efficient separation and recovery of Nb and Ti from leach solution was proposed in this work. The quaternary ammonium salt extractant (N263-CO 3 2- ) was employed to selectively co-extract Nb and Ti from the leach solution for achieving effective separation them from REEs. The resultant Nb(OH) 5 /Ti(OH) 4 precipitates were dissolved in H 2 C 2 O 4 -H 2 SO 4 mixture for selective extraction of [NbO(C 2 O 4 ) 2 - ] using tri-n-octylamine (TOA). The extraction mechanism confirmed that N263 preferentially extracts Nb/Ti via anion exchange, with the primary contribution from N263-CO 3 2- to Nb/Ti extraction, followed by N263-SO 4 2- , while protonated TOA selectively extracts [NbO(C 2 O 4 ) 2 - ] through anion–cation association. Ultimately, the recovery efficiencies of Nb and Ti reached 96.0 % and 69.0 %, respectively, producing Nb 2 O 5 (99.6 %) and TiO 2 (99.2 %), with REEs losses < 0.5 %. This study offers a novel approach for the efficient selective separation and recovery of Nb/Ti from leach solution.
研究领域:
冶金学
·
材料科学
·
化学工程
·
环境科学
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Lianbo Wang,Jun Ren,Yuantao Zhao,Vincent Ji,Huabing Liu,Min Liu,Zemin Wang,Chuanhai Jiang,Zhanyong Wang
In this study, Ni-Ti composite coatings were prepared using electrodeposition . Experimental results and COMSOL computer simulation revealed the effect of the Ti microparticles on the microstructure and properties of the Ni-Ti composite coating. The incorporated Ti microparticle lead to grain refinement, texture elimination which were correlated with the effect of current concentration and heterogeneous nucleation. Domains consisting of inner nano-grains and outer radial columnar grains were located around the Ti microparticles, where the Ti microparticles acted as seeds. This was closely correlated with the time-dependent plating conditions like current density and electric field lines during incorporation process of the Ti microparticles. Besides that, during the incorporation process of Ti microparticles, current density concentration on the “V”-shaped valley between closely neighboring Ti microparticles promote the presence of fine Ni grains, existing between but not belonging to the Ti microparticles. Selective deposition of Ni metal on Ti microparticle surface, local current density concentration and the aggregation of Ti microparticles were observable, contributing to the spatial heterogeneity of the microstructure. Compared with the pure Ni coating, the average hardness of the Ni-Ti composite coating increased from 2.91 ± 0.43 GPa to 3.98 ± 0.46 GPa, leading to the enhanced wear resistance. However, spatial heterogeneity of the hardness distribution was observed due to the heterogeneous microstructure of Ni-Ti composite coating, which confined the improvement of wear resistance.
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高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2022
·Vol. 106
·期 1
·158-172
·
IF 2.606
Luo Qiuzi,Sun Yihua,Guo Jin,Zhang Jiangyu,Fang Liang
In this study, the effect of Ti doping ratio on Ti/Ga co-doped ZnO (TGZ) nanopowders was investigated. TGZ nanoparticles with different Ti loadings were prepared using the sol-gel method and analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), infrared spectroscopy (FT-IR), ultraviolet-visible spectrophotometer (UV-Vis), X-ray photoelectron spectroscopy (XPS) and photoluminescence (PL). The results show that when the Ti doping content is low (0.25at%–1at%), all TGZ samples are single-phase and have the same wurtzite structure as pure ZnO, and when the Ti doping content is high (1.5at%–6at%), a second phase appears, which is the Zn 2 TiO 4 inverse spinel phase. When the doping is low, Ti and Ga can replace the position of Zn, the particle size of ZnO is reduced, the absorption of visible light is enhanced, and the catalytic degradation ability is improved. When the powder is highly doped, the shape distortion of the powder is obvious, and the crystal changes from single-phase to multi-phase, but the absorption of visible light is enhanced, and the recombination of electron-hole pairs is reduced. Through the MB degradation experiment, it was found that T 1.5 G 1.5 Z had the strongest degradation ability, and the degradation rate reached 96% in 150 min. With the further doping of Ti, the degradation rate remained at a high level.
Graphical abstract
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高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Wenqiang Ai,Jinnuo Yang,Jiahui Lv,Ya'nan Zheng,Ruiqi Wang,Yang Liu,Lei Zu,Huiqin Lian
Sodium-ion batteries (SIBs) attract significant interest due to the abundance and affordability of sodium resources, alongside their environmentally sustainable profile. Nevertheless, further research is required to improve high-rate performance and long-term cycling stability. Black phosphorus (BP), with its high theoretical specific capacity, and MXenes, known for their excellent electrical conductivity and multiple functional groups, are both promising anode candidates for SIBs. To address these challenges, a composite anode of BP/Ti 3 C 2 T X MXene/carbon nanotubes (CNTs) (BMC) containing phosphorus-oxygen-titanium (P-O-Ti) bonds is prepared through a straightforward two-step ball milling process. The microstructure and bonding conformation of the BMC composite material are studied using a variety of characterization methods. Compared to the BP/CNTs (BC) anode, the BMC anode demonstrates superior cycling stability and high-rate performance. Kinetic analysis further reveals favorable electrochemical performance. The P-O-Ti bonds in BMC significantly enhance SIBs performance by stabilizing the BP-based composite structure. As a result, the reversible specific capacity of BMC anode reaches 630.7 mAh g −1 after 1400 cycles at 2.0 A g −1 . Furthermore, the reversible specific capacity remains stable at 281.1 mAh g −1 even after 1000 cycles at 10.0 A g −1 . This work presents a straightforward method for preparing BMC anodes.
研究领域:
材料科学
·
电化学
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高影响因子
Biochar
·
2023
·Vol. 5
·期 1
·1-16
·
IF 12.7
Liu Fenglei,Wang Shanshan,Zhao Chaofeng,Hu Baowei
Herein, a biochar-based composite (Ti 3 C 2 T x @biochar-PDA/PEI) was constructed by decorating Ti 3 C 2 T x and polydopamine on coconut shell biochar via electrostatic self-assembly method. Different characterization techniques were applied to explore the structure, morphology and composition of the sorbents. It was found that the higher porosity and diverse functional groups were conducive for Ti 3 C 2 T x @biochar-PDA/PEI to capture radionuclides, and the water environmental conditions made a great contribution to the adsorption process. The process of removing U(VI)/Cs(I) well complied with the Langmuir isotherm and Pseudo-second-order equations, which indicated that the single layer chemical adsorption occurred on the solid liquid interface. Meanwhile, this produced composite exhibited superior removal performance under complex co-existing ion environment, and the maximum adsorption amounts of U(VI) and Cs(I) reached up to 239.7 and 40.3 mg g −1 . Impressively, this adsorbent still exhibited good adsorption performance after three cycles of regeneration. The spectral analysis and DFT calculation demonstrated that adsorption of U(VI) might be a chemical process, while the adsorption of Cs(I) should be ion exchange or electrostatic attraction. This study demonstrated the potential application of Ti 3 C 2 T x @biochar-PDA/PEI as an effective remediation strategy for radioactive wastewater cleanup. Graphical Abstract
研究领域:
环境科学
·
材料科学
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Sadegh Ghorbanzadeh,Zeinab Sanaee,Somayeh Mohammadi
Solid-solution MXenes have emerged as a transformative class of 2D materials, offering unprecedented control over electronic structure and redox activity through M-site compositional tuning. However, their broader development remains constrained by the extreme synthesis temperatures (>1400°C) and complex stoichiometric mixing protocols required for conventional solid-state MAX phase synthesis, which result in secondary phase formation, elemental inhomogeneity, and limited scalability. This study addresses these challenges by introducing a low-temperature, pre-alloyed precursor strategy, the first successful synthesis of a quaternary (Ti,V,Fe) 2 AlC solid-solution MAX phase via molten salt-assisted synthesis at a substantially reduced temperature of 950°C, employing commercial Ti-6Al-4V alloy as the precursor to guarantee atomic-scale transition metal distribution. The resulting MAX phase was subsequently converted into (Ti,V,Fe) 2 C MXene via in-situ hydrofluoric acid (HF) etching using three fluoride salts (LiF, NaF, and NH 4 F), demonstrating that etchant chemistry is a powerful parameter for engineering MXene morphology and electrochemical behavior. A key finding of this work is the direct morphology controllability imparted by fluoride salt selection. LiF-assisted etching produces open, loosely aligned lamellae with expanded interlayer spacing (d ≈ 9.55 Å) and the highest specific capacitance of 126.9 F/g at 5 mV/s; NaF-assisted etching yields compact, well-ordered onion-like aggregates (d ≈ 9.45 Å) with superior interfacial charge-transfer kinetics (R ct = 1.58 Ω); and NH 4 F-assisted etching results in aggressively degraded, defect-rich morphology with significantly reduced performance (65.8 F/g). These results establish an energy-efficient, industrially scalable pathway for the production of morphology-engineered, multi-elemental MXene electrodes and provide a robust mechanistic framework linking etchant hydration chemistry to structural architecture and electrochemical function.
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高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2017
·
IF 3.094
Xinjiang Zhang,Feng Song,Zhiping Wei,Wenchao Yang,Zhongkui Dai
In-situ TiC/Ti titanium matrix composites were successfully fabricated through a novel approach, utilizing the reaction of graphene and Ti mixture powders in spark plasma sintering . Microstructure, hardness and compressive properties of such composites were investigated. The layered graphene nanosheets as the carbon source were dispersed in the powders, and subsequently formed uniform TiC particles in Ti matrix during the rapid sintering. The resulting TiC particles exhibited the micro- and nano-sized equiaxial structures. Such composites possessed the significantly enhanced hardness and room-temperature compressive strength comparing with the as-cast and as-sintered pure Ti. The ultimate and yield compressive strengths of as-prepared 7.0 vol% TiC incorporated composite respectively reached up to 2.64 GPa and 1.93 GPa, beyond some advanced Ti materials reported to date. In-situ micro- and nano-sized TiC particles were believed to be beneficial to harden and strengthen Ti matrix. The relevant strengthening mechanisms of such composites were discussed.
研究领域:
材料科学
·
金属基复合材料
·
粉末冶金
·
力学性能
·
显微结构表征
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高影响因子
危险品化学品经营许可证（带存储）