Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Cairu Shao,Shuai Li,Hongyang Cao,Lijuan Duan,Wendong Lv,Dongxing Wang,Shuai Rao,Kuifang Zhang,Yusi Jiang,Bin Cai
High concentrations of residual xanthate in mineral processing wastewater often limit the reuse of tailing water. Targeted removal of xanthate is an effective strategy for improving the tailing water recycling rate. In this study, the degradation efficiency and mechanism of sodium ethyl xanthate (SEX) in an electroactivated peroxydisulfate (EAPDS) system were investigated systematically. To avoid the influence of co-existing organic and inorganic matters in real flotation wastewater, we used simulated SEX wastewater to conduct the efficiency and mechanism investigation. A significant synergistic effect between electrocatalysis and peroxydisulfate was observed during the SEX decomposition. When the initial concentration of SEX was 200 mg/L, it achieved 100% removal rate only in 30 min with PDS dosage of 5 mM at current density of 10 mA/cm 2 . The introduction of peroxydisulfate boosted the removal efficiency six-fold compared to electrocatalysis alone. UV-Vis spectroscopy and GC-MS analyses revealed that the intermediate products of SEX were C 2 H 5 OH and CS 2 . The reactive oxygen species induced in the EAPDS were identified using a series of detection methods. • OH, 1 O 2 , h + , O 2 •− and electron transportation process (ETP) all contributed to SEX removal. The degradation mechanism in the EAPDS system was proposed based on the analysis of the reactive oxygen species and products. Application to real flotation wastewater was attempted as well. The effects of different operating conditions were also evaluated, including pH, coexisting anions, PDS dosage, and current density. This study provides a new approach for the rapid removal of residual xanthates from mineral processing wastewater.
研究领域:
环境科学
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电化学工程
·
废水处理
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DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2023
·
IF 6.4
Wensheng Yang,Yue Gao,Quan Xie,Tinghong Gao,Yongchao Liang,Qian Chen,Zean Tian,Yunjun Ruan
The Ti substrate, with physicochemical stability and excellent electrical conductivity, is potential to fabricate all-solid-state batteries. However, the Titanium atoms at high-temperature synthesis makes it easy to react with active materials. Modifying the titanium surface with an inert protective layer while ensuring high electrical conductivity remains a significant challenge. Herein, a pencil was used to draw on the Ti substrate and subsequently sintering at a high temperature to obtain a graphite-coated Ti substrate (Ti-Graphite). The experimental results show that Ti-Graphite has a smoother surface and fewer defects in the graphite layer. Moreover, titanium carbide is formed at the interface of graphite and Ti substrate, which will enhance the physicochemical stability of the Ti-Graphite. To gain deep understanding of the evolution mechanism in the synthesis, molecular dynamics simulations were carried out to investigate it. The results exhibit that the voids at the C/Ti interface and stress in the model were significantly decreased after sintering and cooling treatment, proving that Ti-Graphite has a smoother surface, a more stable interface, and fewer defects at the atomic scale. Therefore, we provide a simple and facile strategy to obtain a Ti-graphite substrate with superior physicochemical stability, which reaveals excellent potential to synthesize high-performance all-solid-state batteries.
研究领域:
材料科学
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电化学
·
计算模拟
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高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2021
·Vol. 26
·期 1
·269-280
·
IF 2.647
Li Xueying,Wang Jiangang,Duan Fenyan,Tao Luwen,Xu Teng,Chen Lizhuang,Yuan Aihua,Wang Xiaolong
The electrode materials with long cycle life are important for the large-scale application of sodium ion batteries. In this work, P2-type Na 0.71 Co 0.96- x Ti x O 2 ( x = 0, 0.057, 0.073, 0.09) were synthesized by molten-salt method. The Ti doping content could influence the crystallographic unit cell volume, particle size, oxygen vacancies, and surface charge density of those samples. When x = 0.073, the P2-type Na 0.71 Co 0.96- x Ti x O 2 ( x = 0.073) exhibits superior reversible capacity and rate performance due to the appropriate synergistic effect. In particular, the initial discharge capacity of NCTO-0.073 is about 118.5 mAh g −1 at 100 mA g −1 . Even the current density gets to 1000 mA g −1 , the initial discharge capacity remains 71.7 mAh g −1 after 1000 cycling with the capacity retention of 67.90%. The electrochemical kinetics analysis further prove that the P2-type Na 0.71 Co 0.96- x Ti x O 2 ( x = 0.073) owns outstanding electrical conductivity and fast sodium ion diffusion behavior to promote the electrochemical reaction during the charging/discharging. These results will contribute to the industrialized application of stable high-performance cathodes for sodium ion batteries.
研究领域:
材料科学
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电化学
·
能量存储
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高影响因子
JOURNAL OF ORGANOMETALLIC CHEMISTRY
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2019
·
IF 2.066
Yi Zhou,Rui Zhang,He Ren,Xuelian He,Bao Liu,Ning Zhao,Boping Liu
A series of novel V/Ti bimetallic polyethylene catalysts were developed successfully through the introduction of vanadium species into the (SiO 2 /MgR 2 /MgCl 2 )·TiCl x Ziegler-Natta Catalyst. The organometallic heterogeneous catalysts combined advantages of reducibility of magnesium alkyl on the activation of secondary metal active sites (vanadium active sites), which successfully enhanced average molecular weight in homopolymer products and produced dominantly bimodal molecular weight distribution in copolymer products. Catalyst preparation conditions including calcination temperature and magnesium dosage were investigated to explicit the effect on the relative performance of different metal active centers. Moreover, the factors including hydrogen and ethylene/1-hexene copolymerization were systematically studied. The bimetallic catalysts exhibit 63.9% enhancement on activity, 37.3% better hydrogen response than the original (SiO 2 /MgR 2 /MgCl 2 )·TiCl x organic magnesium Ziegler-Natta catalyst. Moreover, a simplified schematic model was proposed to elaborate on the reason why the bimetallic catalysts showed much higher activity than the original one, and each active species performance well. Vanadium active sites react quickly in the initial reaction time on the external surface of the support, which helps titanium active sites crack the catalyst particles together in the fragmentation and activation stage; then the released internal surface active sites, which were accessible to the monomer in the slurry phase, speed up the polymerization reaction during the latter reaction process.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2022
·Vol. 5
·期 2
·1362-1375
·
IF 11.806
Wang Deng,Wang Rui,Huang Kai,Lei Ming,Tang Haolin
The Si-P nanohybrids, as an underlying candidate for the anode material of the next-generation lithium-ion batteries (LIBs), possess a high theoretical specific capacity of 2900 mAh g −1 but decays rapidly owing to the large volume change during lithiation/delithiation. Meanwhile, two-dimensional transition metal carbides (MXenes) with outstanding conductivity and specific crystal structure have been revealed with a relative low Li + diffusion barrier, which exhibits underlying application prospects in the area of energy storage and can be particularly utilized as the conductive matrix for realizing the outstanding performance of lithium storage. Herein, we employ an MXenes (Ti 3 C 2 T x )-buffer strategy to improve the electrochemical properties of the traditional Si-P anode by a relatively simple mechanical ball-milling method. Obvious chemical bonds between Si-P and Ti 3 C 2 T x have been confirmed for as-prepared Si-P/Ti 3 C 2 T x composites, where P nanolayer acts as an intermediate layer and guarantees the composite integrity and the tight contact between red phosphorus, Si, and Ti 3 C 2 T x matrix. Moreover, the Si-P/Ti 3 C 2 T x composite electrode, in comparison with Si-P composite and Si, exhibits an enhanced rate performance (632.4 mAh g −1 at 5A g −1 ) and a higher reversible capacity (980.8 mAh g −1 after 500 cycles at 500 mA g −1 ), indicating it’s a promising candidate for advanced LIBs anode. Graphical abstract The high-performance chemically bonded double-conductive protective layer lithium-ion battery anode was developed by mechanical ball-milling strategy.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
JOURNAL OF CLUSTER SCIENCE
·
2026
·Vol. 37
·期 6
·139
·
IF 4.1
Chen Hechang,Wu Fei,Zhu Yufu
Titanium microspheres served a dual role in this study. First, they acted as supporting materials for TiO 2 /BiOBr photocatalysts. Second, they provided a low-cost precursor for titanium dioxide preparation. The growth of core-shell structured Ti@TiO 2 microspheres was realized using a hydrothermal method in NaOH solution. By varying the concentration of NaOH solution, TiO 2 nanowires with different morphologies were fabricated. A comprehensive characterization of the samples using field-emission scanning electron microscopy, X-ray diffraction measurements, and energy-dispersive X-ray analysis revealed that TiO 2 nanostructures formed a well-coated layer on titanium microspheres, demonstrating an anatase crystal structure. The photocatalytic performance of the obtained core-shell structured Ti@TiO 2 microspheres was studied through the photocatalytic degradation of Rhodamine B (RhB) solution. The results demonstrated that the sample prepared in NaOH solution with the concentration of 7 M exhibited the best photocatalytic performance, achieving an RhB removal efficiency of nearly 100% within 100 min under simulated light irradiation. In order to further improve the photocatalytic performance of the prepared samples, BiOBr was loaded on the surface of TiO 2 nanowires via a solvothermal method, yielding core-shell structured Ti@TiO 2 /BiOBr heterojunction photocatalysts, consisting of a metallic Ti core and a composite TiO₂/BiOBr shell. The catalysts demonstrated a significant enhancement in photocatalytic performance compared with core-shell structured Ti@TiO 2 microspheres, achieving nearly complete degradation of RhB solutions within 30 min. Furthermore, the photocatalyst maintained 91.92% of its activity after three consecutive cycles.
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Jin Qin,Yanlong Cao,Boxin Wei,Dafeng Lin,Yu Zhao
Vanadium dioxide (VO 2 ) is a promising thermochromic material for smart windows; however, its practical application is limited by a relatively high phase transition temperature ( T c ) and insufficient modulation capability in both luminous transmittance ( ) and solar energy ( ). Cation co-doping serves as an effective strategy for optimizing its thermochromic performance near room temperature. W-Ti co-doped VO 2 films were fabricated via a two-step rapid thermal processing (RTP) annealing method using vanadyl acetylacetonate as the precursor. The co-doping of W and Ti leads to an enhancement in the thermochromic performance of the VO 2 thin films. The phase transition temperature ( T c ) was reduced from 69.75 °C to 52.35 °C. By adjusting the Ti doping content, the co-doped films maintained a low Tc while improving the luminous transmittance modulation ( ) from 39.8% to 46.1% and the solar energy modulation ability ( ) from 6.3% to 9.3%. These improvements are attributed to modifications in the band structure induced by W-Ti co-doping. The enhanced thermochromic performance, compared with that of undoped VO 2 , demonstrates that W-Ti co-doping provides a promising strategy for advancing VO 2 -based smart window applications.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Qinghao Song,Zhihao Huang,Ying Xiao,Yu Zhang,Liyi Li,Yi Yu,Si Chen,Qing Wu
MXene Ti 3 C 2 has emerged as a promising biosensing material due to the high surface area, excellent biocompatibility, tunable functional groups (-F, O, -OH), and outstanding electrical conductivity, effectively addressing issues such as low sensitivity and inadequate biocompatibility in sensors. This work, MXene Ti 3 C 2 -AuNPs are synthesized as functional materials through a one-step synthesis method. We propose the first all-fiber biosensor featuring a laterally offset SMF-MMF-SMF-MMF-SMF (SMSMS) interferometric structure functionalized with MXene Ti 3 C 2 -AuNPs as the substrate of the biosensor sensor device, for the detection of the alkane degradation (ALK) gene, to the best of our knowledge. The biosensor enables in-situ target DNA (tDNA) detection across 1 fM to 1 μM concentrations based on this nanoengineered interface, demonstrating 1755.95 nm/RIU sensitivity and a 1 fM limit of detection (LOD) – Two orders of magnitude lower than conventional optical DNA sensors (μM-level). The sensor exhibits a wavelength shift of 1.23 nm in response to complementary DNA, which is 8.2 times greater than that for non-complementary DNA, with a maximum wavelength shift error of 0.11 nm across three repeated experiments and a shift within 0.1 nm over 7 days for sensors with attached functional MXene Ti 3 C 2 , demonstrating excellent specificity, stability, and reproducibility. These advantages render the fiber optic device coated with MXene Ti 3 C 2 -AuNPs an effective solution for ALK gene monitoring and broaden its applicability for ultra-trace DNA detection in environmental and biomedical contexts
研究领域:
生物传感器
·
纳米技术
·
光学传感
·
分子生物学
·
环境监测
·
生物医学工程
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产品关联
DOI
高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Can Sun,Runze Guo,Zhexiao Zhu,Shouxin Zhu,Jingyi Qu,Zijie Fang,Xiaolu Xu,Jiahui Lin,Yangben Chen,Shijie Zhang,Hui Zheng
Photocatalytic nitrogen fixation as a green, environmentally friendly, mild and low energy-consuming nitrogen fixation is considered as an ideal way to produce ammonia. Herein, inspired by nitrogen-fixing enzymes, the MOF materials Fe-sdc and Ti-sdc were synthesized by a simple solvothermal synthesis method using Fe and Ti as metal nodes and 4,4′-stilbenedicarboxylic acid (H 2 sdc) as a ligand. The ammonia production rates of Fe-sdc and Ti-sdc were 61.01 μmol g −1 h −1 and 46.84 μmol g −1 h −1 . The 15 N 2 isotope experiments were utilized to determine the nitrogen source for ammonia synthesis during the nitrogen fixation process of Fe-sdc. Various characterization analyses were also utilized to analyze the reasons for the better nitrogen fixation performance of the two catalysts.
研究领域:
材料科学
·
环境科学
·
催化化学
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产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Qixiang Zhan,Shuhua Deng,Jiayi He,Jinhua Xu,Anfu Chen,Jiajun Luo,Wenjie Zhang,Caihong Lei
The elasticity mismatch between Ti and tissue limits the performance of Ti medical devices. How to create a coating with mimicking natural soft tissue stiffness and possessing strong mechanical bond is a challenge in implant manufacturing. Here, we developed a combined coating, that is, an anodized Ti surface (ATS) with nanostructures coated with a layer of PAAm hydrogel with tunable elasticity. Due to the nano-mechanical interlocking and hydrogen bonding synergy, the PAAm hydrogel layer was tightly anchored in nanostructures on the ATS. By regulating the oxidation voltage, nanostructures including nanopores, nanotubes, and punch-through nanotubes were fabricated on the ATS, and these three kinds of anodized nanostructures increase the porosity of the ATS sequentially. The lap shear test has shown that the shear strength increases linearly with increasing the porosity, and the shear strength of the punch-through nanotube structures with the PAAm hydrogel coating reaches 59.28 kPa. The adhesion mechanism between the anodized Ti nanostructures and the PAAm hydrogel coating is mainly due to the nano-mechanical interlocking and hydrogen bonding synergy, which was proven by morphology analysis, XRD, and ATR-FTIR characterization of the samples subjected to lap shear load. The hydrogel-nanostructures coating has demonstrated the potential to be applied in Ti medical devices.
研究领域:
生物材料
·
材料科学
·
组织工程
·
机械工程
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DOI
高影响因子
Materials
·
2019
·Vol. 12
·期 22
·3751
·
IF 2.972
Gongjun Cui,Yanping Liu,Guijun Gao,Huiqiang Liu,Sai Li,Ziming Kou
Ti–Al matrix alloy reinforced with a high content of boron was fabricated by using a high-temperature alloying method and powder metallurgy technique (P/M). The preparation method of Ti–Al–B alloying powder was put forward. Phases, microstructure, and mechanical properties of the alloys were investigated. Wear and friction performance were studied by using a ball-on-disc tribotester sliding against a Si3N4ceramic ball from 23 °C (room temperature) to 900 °C. The Ti–Al–B alloy had a higher specific strength than that of the Ti–Al alloy. The boron element obviously enhanced the wear resistance and mechanical properties of the alloys because of the formation of borides (TiB2and AlB2) in matrices and the stable oxide film on the wear tracks. Friction coefficients of alloys were independent of the boron element. The wear mechanisms of the alloys transferred from fatigue wear to oxidative wear with the increase in temperature.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Hao Deng,Aijun Chen,Longqing Chen,Yongqiang Wei,Zuxi Xia,Jun Tang
Elemental powder metallurgy is an effective way to improve the ductility and strength of nanostructured TiAl alloys. However, the high ductility of Al largely restricts the application of elemental powder metallurgy . Here we demonstrate a novel avenue in fabricating nanostructured Ti-45Al-8Nb alloys by cryomilling (CM) and Spark Plasma Sintering (SPS) from elemental powder metallurgy. Our work reveals that CM not only prevents the Ti/Al/Nb powder mixture from cold welding , but also makes the resultant powder homogeneous with an average particle size of 217 nm. The nano-powders were sintered by SPS at 900, 1000 and 1100 °C, forming ultrafine grained (UFG) equiaxed near-γ and lamellar structures . Particularly, as a result of grain refinement strengthening, the specimen sintered at 1000 °C shows excellent mechanical properties, with the compression yield strength, fracture strength and plastic strain as 1575 MPa, 2627 MPa and 23.5%, respectively at room temperature; and 955 MPa, 1041 MPa and 38.4%, respectively at 850 °C. This work demonstrates the superiority of the combined CM-SPS in fabricating nanostructured Ti-45Al-8Nb alloys with enhanced mechanical properties, which is considered as highly potential in exploring high-performance TiAl alloys.
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DOI
高影响因子
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