Surfaces and Interfaces
·
2024
·
IF 5.7
Xingyu Wu,Yaoqi Lei,Yanzong Zhang,Zhenxing Zeng,Lulu Long,Xiaojing Wang,Yan He,Gang Yang,Fei Shen,Yan Liu
Excessive discharge of wastewater containing phosphorus is the leading cause of water eutrophication. In this study, yttrium ions were embedded in chitosan/polyvinyl alcohol hydrogel beads by adsorption of amino functional groups. After alkali treatment, a new chitosan-based yttrium hydrogel adsorbent (PC-Y-OH) with porous channels was perpetrated. The results showed that alkali treatment reduced the protonation of amino functional groups in hydrogel and made PC-Y-OH have stable adsorption of phosphate in the initial solution of pH 4∼10. Compared with hydrogel beads without alkali treatment (PC-Y 3+ ), the inhibition of high concentration bicarbonate and sulfate of PC-Y-OH was reduced by 47 % and 43 %, respectively, under acidic conditions (initial pH of 3). In weak acid (initial pH of 6) or alkaline (initial pH of 8) conditions, its adsorption capacity is almost uninhibited by co-existing substances. After regenerating the adsorbent with an alkali solution 7 times, the adsorption capacity was still over 80 % of the first adsorption. The adsorption kinetics and thermodynamics results indicated that PC-Y-OH could reach the adsorption equilibrium within 2 h, and the adsorption process was a spontaneous exothermic process with a maximum adsorption capacity of 62.36 mg-P/g. Surface chemical analysis of the adsorbent indicated that phosphate adsorption on the adsorbent was primarily driven by chemical complexation. Moreover, this provides a promising adsorbent for recovering phosphorus from aquatic environments.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
Metals
·
2024
·Vol. 14
·期 11
·1288
·
IF 2.6
Tianzhu Mu,Fuxing Zhu,Yan Zhao,Haoyu Fang,Haohang Ji,Lei Gao
Titanium metal is primarily produced via the Kroll process, which is characterized by a semi-continuous production flow and a lengthy process cycle, resulting in high production costs. Researchers have explored alternative methods for titanium production, including molten salt electrolysis, such as the Fray–Farthing–Chen (FFC), Ono Suzuki (OS), and University of Science and Technology Beijing (USTB) processes, aiming to achieve more economical production. Among these, the USTB process, a representative of soluble anode electrolysis, has shown significant promise. However, controlling oxygen concentration in titanium produced by soluble anode electrolysis remains a challenge. This study proposes a novel approach to enhance deoxidation efficiency in soluble anode electrolysis for titanium production by introducing yttrium chloride (YCl3) into the molten salt electrolyte. Thermodynamic analysis and experimental validation demonstrate that the theoretical deoxidation limit for titanium can reach below 100 ppm under Y/YOCl/YCl3equilibrium. We report the successful synthesis of titanium powder with an oxygen concentration of 6000 ppm from titanium-carbon-oxygen solid solution. Under optimized conditions, the purity of the titanium powder reached 99.42%, demonstrating a new approach for producing high-purity titanium. This method, based on soluble anode electrolysis, offers a potential alternative to the conventional Kroll process. The research elucidates the fabrication process and analytical methods for titanium-carbon-oxygen solid solution, and employs a combination of analytical techniques, including XRD, SEM-EDS, and ONH Analyzer, for characterization of the electrolytic product, encompassing phase analysis, microstructure, and oxygen concentration testing.
研究领域:
冶金学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHARACTERIZATION
·
2021
·
IF 4.342
Wennan Su,Xiufang Cui,Guo Jin,Yajie Guan,Yao Zhao,Simin Wan,Changhao Liu,Yuyun Yang,Haoliang Tian
NiTi, NiTi-4Si, and NiTi-4Si-2YF 3 coatings were prepared on Ti-6Al-4V substrate by laser cladding to obtain composite multilayer protective coating for composite structure. The effects of Si and YF 3 addition on the microstructure, phase composition, microhardness , and phase transformation of the coatings were systematically analyzed. The coatings are mainly composed of NiTi, NiTi 2, and TiN phases. The addition of YF 3 results in the decrease of the dendrite TiN phase in the coating. TEM results show that the core-shell structure is observed in NiTi-4Si coating. The β -Ti phase was surrounded by the shell NiTi 2 phase. After the addition of YF 3 , the core-shell structure was found to disappear. With the addition of the Si element, the eutectic structure was found in the coatings. The eutectic structure is mainly composed of NiTi (B2) and Ti 2 Si phases. According to the SEAD result, there are crystallographic orientation relationships (ORs) between NiTi (B2) phase and Ti 2 Si phase as follows: 1 ¯ 11 B 2 / / 1 ¯ 23 Ti 2 Si . The average microhardness of the NiTi, NiTi-4Si and NiTi-4Si-2YF 3 coatings were at 468.33 HV 0.5 , 499.86 HV 0.5 , and 433.65 HV 0.5 , respectively. At the same time, the uniformity of the NiTi phase in NiTi-4Si-2YF 3 coatings is improved, which is conducive to a more complete phase transition.
研究领域:
材料科学
·
表面工程
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Erqing Zhao,Yudi Guo,Guangri Xu,Long Yuan,Jingcheng Liu,Xiaobo Li,Li Yang,Jingjing Ma,Yuanchao Li,Shumin Fan
Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 is regarded as one of the most promising solid electrolytes for all solid state lithium ion batteries (ASSLIBS). However, its grain boundary conductivity is still low, which reduces the total conductivity of electrolyte. In this work, in order to further improve the electrical conductivity of Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 , a series of Y doped Li 1.3 Al 0.3-x Y x Ti 1.7 (PO 4 ) 3 (x = 0, 0.025, 0.05, 0.075 and 0.15) solid electrolytes were synthesized using a modified solid state method. Effects of Y doping content on morphology, phase and electrical conductivity of Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 electrolyte materials were systematically investigated. All synthetic electrolyte powders show Nasicon-like structure, well-shaped polyhedral morphology as well as good crystallinity. Y dopant content has a great influence on electrochemical properties of electrolytes. The high total conductivity of 7.8 × 10 −4 S/cm at room temperature and a low activation energy of 0.17 eV is obtained for the electrolyte with the Y doping content of 0.075 due to the increasing of grain boundary conductivity, and its electrical conductivity is about 2 times larger than that of the undoped electrolyte. The excellent electrochemical performance is mainly attributed to high electrolyte density which results from the good sintering property of electrolyte materials as well as the existence of YPO 4 phase at grain boundaries. Additionally, this electrolyte has a negligible electronic conductivity. These results suggest that Y doped Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 can be used as an alternative solid electrolyte for all solid state lithium ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2022
·
IF 4.865
Peng Liu,Xi Tan,Hao Ren,Wei Liu,Linwen Jiang,Xiaofeng Zhang
To improve the long-term oxidation resistance of SiC fibers, a novel yttrium-doped lanthanum monazite (Y-LaPO 4 ) coating was deposited onto the surface of SiC fibers (Y-LaPO 4 /SiC f ) by a simple hydrothermal method . The static oxidation behavior of Y-LaPO 4 /SiC f , SiC fibers coated with lanthanum monazite (LaPO 4 /SiC f ), and SiC fibers without coatings (SiC f ) was studied at 1350 °C for 50 h. The results indicated that yttrium diffused into the oxide scale during oxidation process. The thicknesses of the oxide scales for the oxidized fibers in Y-LaPO 4 /SiC f and LaPO 4 /SiC f were about 4.56 and 11.31 μm. SiC fibers without coatings were completely oxidized to silica . Furthermore, the oxidation kinetic curves of SiC f , LaPO 4 /SiC f , and Y-LaPO 4 /SiC f exhibited a parabolic trend during oxidation for 15, 20, and 50 h. Calculated the oxidation rate constants of SiC f , LaPO 4 /SiC f , and Y-LaPO 4 /SiC f were found to be 1.37, 1.08, and 0.40 μm 2 /h, respectively. The system of Y-LaPO 4 coatings not only retains LaPO 4 as a framework of the interface, but also incorporates yttrium to improve the oxidation resistance of fibers. Therefore, doping yttrium in lanthanum monazite can enhance the adherence between coatings and oxide scales and improve the oxidation resistance of SiC fibers.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 14
·4398-4406
·
IF 4
Hongyuan Song,Bin Liu,Jinhua Zeng,Guangpeng Huo,Liangwei Chen,Jianlu Wang,Lan Yu
The transition metal oxide (TMO) SrCoO3−δ family with rich structural diversity has been widely studied in the phase transition and energy application fields. We report the multiple-phase structure evolution, phase transitions during sintering, and electrical transport of A-site doped Sr4−xYxCo4O12−δ (x = 0–1.0) ceramics. Sr6Co5O15 (x = 0) adopts a hexagonal structure (H), Sr4−xYxCo4O12−δ (x = 0.2–0.4) ceramics adopts a cubic perovskite (CP) structure, and Sr4−xYxCo4O10.5+δ′ (x = 0.8–1.0) ceramics adopts an ordered-tetragonal (OT) structure; moreover, their phase transitions during the sintering processing of samples are systematically investigated. Combining the thermal analysis and X-ray diffraction results, the exothermic peak and weight gain of Sr3YCo4O10.5 (x = 1.0, T) at 1042 °C are considered to correspond to an ordered phase transition (T → OT) occurring. Finally, a systematic phase schema of the Sr4−xYxCo4O12−δ (x = 0–1.0) state dependence on the Y content and sintering temperature is obtained. The high-energy Y–O bond stabilizes the high-temperature CP structure (x = 0.2–0.4) and induces a structural evolution from the CP to OT structure (x = 0.8–1.0). In addition, all Sr4−xYxCo4O12−δ (x = 0–1.0) ceramics show semiconductive electrical transport behavior. Sr6Co5O15 (H) with a one-dimensional chain structure has the highest resistivity, while Sr3.8Y0.2Co4O12−δ (CP) with a three-dimensional corner-sharing structure exhibits the lowest resistivity, and Sr4−xYxCo4O12−δ (x = 0.2–1.0) ceramics show an increasing tendency in resistivity due to the hole carrier Co4+ converting to Co3+. We studied multiple-phase evolution and ordered phase transition in Sr4−xYxCo4O12−δ (x = 0–1.0) ceramics through Y–O bonding.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
·
2023
·
IF 3.6
Meng-Chao Li,Lu Wang,Zheng-Liang Xue
The influences of different parameters, such as reaction temperature, yttrium (Y) content, and H 2 concentration, on the particle size and morphological structure of Mo powder prepared via the H 2 reduction of MoO 2 , were investigated in the work. TG, XRD , FE-SEM, laser particle size analysis , model fitting, and orthogonal design experiment methods were adopted to analyze the reaction kinetic and reduction mechanism. The results showed that the optimum conditions for preparing ultrafine Mo powder were recognized as 1073 K, 1 mass% Y content, and a H 2 concentration of 0.000576 mol·cm −2 ·min −1 , which enabled the as-prepared Mo powder with a particle size as small as 107 nm. A new interfacial chemical reaction model with the consideration of reaction temperature, H 2 concentration, and sample thickness, was proposed to analyze the reaction kinetic. It was found that the curves predicted by the model agreed well with the experimental data, with the apparent activation energy extracted to be 94.686 kJ/mol. The effect of different individual parameter on the reaction rate and the possible reduction mechanism were also elucidated.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Ping Liang,Yihao Zheng,Xiaoyan He,Xiaoli Peng,Weilan Huang,Beichen Ying,Xuejie Zhang,Chaofan Hu,Bingfu Lei,Yingliang Liu,Jianle Zhuang
Carbon dot (CD)-based room-temperature phosphorescent (RTP) materials have aroused wide attention owing to their excellent photophysical properties. However, the reports of RTP CDs in information encryption and erasure applications are limited. Herein, a new-type of CD-based RTP material is constructed by incorporating the fluorescent CDs into yttrium hydroxide matrix (CDs@Y(OH) 3 ). For the first time, the Y(OH) 3 as a rigid matrix is used to stabilize the triplet state of the CDs and protect the CDs from oxygen. Furthermore, the intramolecular motions of the CDs are limited, due to the space confinement of the Y(OH) 3 matrix and the formation of hydrogen bonds, thus effectively suppressing the non-radiative transition of triplet excitons and promoting phosphorescence emission. Based on superior optical performance, the CDs@Y(OH) 3 composites are successfully applied in information encryption, and decryption. In addition, by destroying the Y(OH) 3 matrix with acetic acid spray, the phosphorescence is invalidated and the information is erased after decryption. This finding not only provides a new strategy for the preparation of CD-based RTP materials but also reveals the great potential of CDs in information security and protection.
研究领域:
材料科学
·
光学
·
信息安全
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Shuang Gao,Zhenxing Wang,Yan Chen,Yimu Wang,Qiyuan Fu,Changhao Feng
The efficient and rapid detection of triethylamine (TEA) is crucial in the field of gas sensors. Sensors fabricated using doped ternary metal oxides demonstrate high response, good stability, excellent gas selectivity, and reproducibility. In this study, NiFe 2 O 4 nanofibers doped with different concentrations of Yttrium (Y/Ni = 0 at%, 1.5 at%, 2.5 at%, 3.5 at% and 4.5 at%) were synthesized via electrospinning, and gas sensors fabricated from these materials were systematically analyzed for their gas-sensing performances. The results indicated that the gas-sensing properties of Y-doped NiFe 2 O 4 nanofibers were improved. Gas sensors based on Yttrium-doped NiFe 2 O 4 nanofibers with a Y/Ni ratio of 2.5 % (referred to as 2.5 % Y-NFO) exhibited the best performance, exhibiting a gas response of 39.3 for the detection of triethylamine at a concentration of 100 ppm at 125 °C. This response was about 3.1 times higher than pure NiFe 2 O 4 nanofibers. Additionally, the response time of 2.5 % Y-NFO is only 2 s, which is much faster than other reported TEA sensors. In addition, these gas sensors exhibit excellent repeatability, selectivity, and humidity resistance. Finally, the underlying mechanism responsible for the enhanced gas-sensing properties is comprehensively discussed. This study presents a simple, stable, and effective route for synthesizing Y-NiFe 2 O 4 nanofibers, thereby achieving excellent sensing performance for TEA detection.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 46
·26718-26728
·
IF 3.049
Wei Han,Wenlong Li,Jiazhuang Chen,Mei Li,Zhuyao Li,Yongchang Dong,Milin Zhang
Cyclic voltammetry, square wave voltammetry, linear polarization, chronopotentiometry and chronoamperometry were performed to investigate the electrochemical properties of Y(III) on W and Pb electrodes in LiCl–KCl eutectic melts. The diffusion coefficient of Y(III) measured by various techniques was in the order of 10−5. The nucleation of Y on W electrode was found to comply with the instantaneous nucleation mechanism. With increasing temperature, the exchange current densities increased and the charge-transfer resistances decreased, and exchange current densities are distinctly larger on liquid Pb electrode compared with W electrode. In addition, the co-deposition mechanism of Y(III) and Pb(II) on W electrode was also studied and four Pb–Y intermetallics could be detected. The feasibility of extraction metallic Y from the melts was explored by co-deposition on W electrode and under-potential deposition on liquid Pb electrode and the extracted products consisted of Pb3Y and Pb phases.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2025
·Vol. 172
·期 3
·034516
·
IF 3.3
Fadong Miao,Yuanyi Xiang,Wenbin Tang,Rongzhong Yang,Yi Zhou,Qinghong Huang,Nengfei Yu,Yuping Wu
Designing efficient and stable oxygen evolution reaction (OER) catalysts is crucial for advancing water electrolysis technologies toward sustainable hydrogen production. Ruthenium pyrochlore oxide (A2Ru2O7−δ) has attracted much attention due to its high OER catalytic activity and low cost. However, their catalytic activity and stability require further improvement to achieve commercial viability. In this study, a series of Pt-deposited Yttrium ruthenate (Y2Ru2O7−δ, YRO) bifunctional catalysts Pt(x%)-Y2Ru2O7 were prepared by hydrothermal and heat treatment methods. In an acidic environment, the OER activity and stability were significantly improved compared with YRO, and hydrogen evolution reaction (HER) performance gradually improved. Among them, Pt(25%)-YRO showed excellent OER (η10 = 260 mV, 43.1 mV dec−1) and HER (η10 = 120 mV, 51.2 mV dec−1) performance. In addition, Pt(25%)-YRO demonstrated excellent catalytic stability, with both the OER and the overall water splitting reaction maintaining stable operation at 10 mA cm−2 for over 50 h. This provides a new approach for developing high-activity, high-stability, dual-function water electrolytic catalysts for use in harsh acidic environments.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Wang Shijie,Liang Kang,Zhao Hongshun,Wu Min,He Junfeng,Wei Peng,Ding Zhengping,Li Jianbin,Huang Xiaobing,Ren Yurong
High-capacity power battery can be attained through the elevation of the cut-off voltage for LiNi 0.83 Co 0.12 Mn 0.05 O 2 high-nickel material. Nevertheless, unstable lattice oxygen would be released during the lithium deep extraction. To solve the above issues, the electronic structure is reconstructed by substituting Li + ions with Y 3+ ions. The dopant within the Li layer could transfer electrons to the adjacent lattice oxygen. Subsequently, the accumulated electrons in the oxygen site are transferred to nickel of highly valence state under the action of the reduction coupling mechanism. The modified strategy suppresses the generation of oxygen defects by regulating the local electronic structure, but more importantly, it reduces the concentration of highly reactive Ni 4+ species during the charging state, thus avoiding the evolution of an unexpected phase transition. Strengthening the coupling strength between the lithium layers and transition metal layers finally realizes the fast-charging performance improvement and the cycling stability enhancement under high voltage.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）