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学者姓名：席晓丽
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Abstract ：
In this work, graphite was used as a self-consuming anode to synthesize WC nanopowders in situ in a molten salt containing Na2WO4 with Na2CO3. The effects of electrolysis voltage, W/C molar ratio, electrolysis temperature and time on the physical phase composition and morphology of the products were discussed. The intrinsic relationship between the carbon content in the molten salt during electrolysis and the electrolysis efficiency was revealed. The results show that WC powders with a particle size of about 100 nm can be prepared at a temperature of 800 degrees C and an electrolysis voltage of 3.5 V with a W/C molar ratio of 10:1. The carbon content in the molten salt increases and then decreases with time in the electrolytic process and the current efficiencies show a corresponding correlation. STEM results demonstrate that a single WC grain size can be up to 20 nm, which starts from a nucleation point on the carbon surface and grows along the initial grain spread. Cyclic voltammetry indicated that WO42- and CO32- were co-reduced and deposited to form the WC phase instantaneously. An analysis of the chronocurrent curves shows that the WC grains grow at the cathode in a transient nucleation mode.
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| GB/T 7714 | Wang, Yaoyao , Xi, Xiaoli , Zhang, Liwen et al. Preparation of Tungsten Carbide Powder by In Situ Electrolysis Utilizing Self-Consuming Graphite Anode [J]. | METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE , 2024 , 55 (3) : 1471-1481 . |
| MLA | Wang, Yaoyao et al. "Preparation of Tungsten Carbide Powder by In Situ Electrolysis Utilizing Self-Consuming Graphite Anode" . | METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE 55 . 3 (2024) : 1471-1481 . |
| APA | Wang, Yaoyao , Xi, Xiaoli , Zhang, Liwen , Nie, Zuoren . Preparation of Tungsten Carbide Powder by In Situ Electrolysis Utilizing Self-Consuming Graphite Anode . | METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE , 2024 , 55 (3) , 1471-1481 . |
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Abstract ：
Separation and recovery of molybdenum (Mo) with high concentrations from spent catalysts is a strategy for avoiding the environmental footprint by metal mining and the disposal of hazardous wastes, while alleviating resource shortage. In this paper, a method for constructing a binary (SiO2-Na2O)/ternary (SiO2-Na2O-B2O3) glass phase extraction (GPE) system to selectively extract the impurity metal ions from spent catalysts as well as simultaneously separate and recover Mo is presented. Based on experimental studies and classical molecular dynamics simulations, compared with the binary glass network, 99.4% of Al3+ and Ni2+ in spent catalysts were extracted in a more stable tetra-coordinated form at a lower melting temperature (1200 degrees C) by the ternary GPE system introducing B2O3, accompanied by Na2MoO4 precipitated as the recovery product. The recovery efficiency of Mo was 98.1%, realizing an efficient separation and short-process recovery. Moreover, the separation of Na2MoO4 melt and glassy liquid during the melting process was visually observed online. Therefore, this approach of constructing glass GPE systems for the one-step separation of metals during the melting process is expected to contribute to the sustainable supply of critical metals.
Keyword ：
glass glass separation separation recovery recovery molybdenum molybdenum spent catalyst spent catalyst
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| GB/T 7714 | Cai, Yuanyuan , Nie, Zuoren , Xi, Xiaoli et al. Highly Selective Separation and Recovery of Molybdenum from Spent Catalysts by Constructing a Glass-Phase Extraction System [J]. | ACS SUSTAINABLE CHEMISTRY & ENGINEERING , 2024 , 12 (14) : 5484-5495 . |
| MLA | Cai, Yuanyuan et al. "Highly Selective Separation and Recovery of Molybdenum from Spent Catalysts by Constructing a Glass-Phase Extraction System" . | ACS SUSTAINABLE CHEMISTRY & ENGINEERING 12 . 14 (2024) : 5484-5495 . |
| APA | Cai, Yuanyuan , Nie, Zuoren , Xi, Xiaoli , Zhang, Yajiao , Deng, Lu , Zhao, Zhiyong et al. Highly Selective Separation and Recovery of Molybdenum from Spent Catalysts by Constructing a Glass-Phase Extraction System . | ACS SUSTAINABLE CHEMISTRY & ENGINEERING , 2024 , 12 (14) , 5484-5495 . |
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Abstract ：
A straightforward hydrothermal method was employed to fabricate WO3/MoO(3 )composites, with the addition of ascorbic acid (Vc) for modification, resulting in WO3/MoO(3 )composites with oxygen defects (WO3/MoO3-x). WO3/MoO(3-x )exhibits exceptional adsorption-photocatalytic properties, demonstrating strong adsorption capability for dyes achieved through hydrogen bonding and electrostatic interactions. For all products, adsorption rates for methylene blue (MB) exceeded 95 % when reaching adsorption equilibrium. Moreover, an increase in molybdenum (Mo) content endows the samples with enhanced adsorption capacity for methyl orange (MO) and improved photocatalytic performance. Dynamic fitting of the samples revealed that when the W/Mo molar ratios is 2:8, the product W2Mo8-Vc, exhibits the highest photocatalytic activity. After 3 h of illumination, W2Mo8-Vc achieves a remarkable photocatalytic efficiency of 98 % for dyes. This research not only successfully recycles W-Mo alloy scrap but also yields WO3/MoO(3-x )composites with adsorption-photocatalytic properties, offering a novel approach for the recycling of W-Mo secondary resource.
Keyword ：
W-Mo alloy scrap W-Mo alloy scrap Photocatalytic Photocatalytic Hydrothermal Hydrothermal WO3/MoO3-x composites WO3/MoO3-x composites Adsorption Adsorption
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| GB/T 7714 | Liu, Yanan , Liu, Yangsi , Cheng, Jiali et al. Preparation of WO3/MoO3-x composites from W-Mo alloy scrap and it's adsorption-photocatalytic properties [J]. | OPTICAL MATERIALS , 2024 , 157 . |
| MLA | Liu, Yanan et al. "Preparation of WO3/MoO3-x composites from W-Mo alloy scrap and it's adsorption-photocatalytic properties" . | OPTICAL MATERIALS 157 (2024) . |
| APA | Liu, Yanan , Liu, Yangsi , Cheng, Jiali , Ma, Liwen , Xi, Xiaoli , Nie, Zuoren . Preparation of WO3/MoO3-x composites from W-Mo alloy scrap and it's adsorption-photocatalytic properties . | OPTICAL MATERIALS , 2024 , 157 . |
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Abstract ：
As the primary candidate material for plasma facing components (PFCs) in fusion reactor, the serious brittleness of tungsten has become an urgent issue to be solved. In this work, a multi-doped W-Hf-Y2O3 2 O 3 alloy was prepared by high-energy ball milling and spark plasma sintering, aiming at improving its toughness through formation of complex oxide particles. Complex Y2Hf2O7 2 Hf 2 O 7 with pyrochlore structure were developed in the multi-doped WHY alloy due to dissolution and precipitation mechanism, which was confirmed by the combined characterization results of X-ray diffraction (XRD), electron probe microanalysis (EPMA) and transmission electron microscope (TEM). Complex oxide particles of Y2Hf2O7 2 Hf 2 O 7 with average size of 38.8 nm were densely distributed in the alloy. The formation of complex Y2Hf2O7 2 Hf 2 O 7 particles with nano-scale size not only consumed the impurity of oxygen, but also played a critical role in grain refinement because of Zener pinning effect. Improvement in mechanical properties of the multi-doped WHY alloy was then achieved, and the fracture toughness and compressive strength reached 19.7 MPa center dot m1/2 center dot m 1/2 and 2223.4 MPa, respectively.
Keyword ：
Strengthening Strengthening Complex oxide particles Complex oxide particles Toughening Toughening Tungsten-based alloy Tungsten-based alloy Multi-doping Multi-doping
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| GB/T 7714 | Sun, Maolin , Wang, Man , Xi, Xiaoli et al. Synergistical improvement in toughness and strength of multi-doped W-Hf-Y2O3 alloy via formation of complex oxide particles [J]. | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS , 2024 , 124 . |
| MLA | Sun, Maolin et al. "Synergistical improvement in toughness and strength of multi-doped W-Hf-Y2O3 alloy via formation of complex oxide particles" . | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS 124 (2024) . |
| APA | Sun, Maolin , Wang, Man , Xi, Xiaoli , Nie, Zuoren . Synergistical improvement in toughness and strength of multi-doped W-Hf-Y2O3 alloy via formation of complex oxide particles . | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS , 2024 , 124 . |
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Abstract ：
Thermal stability is a crucial issue for engineering application of tungsten, especially as plasma facing material in future fusion reactor. Two kinds of ODS-W alloys of W-0.5Y2O3 (WY) and W-0.5Y2O3-0.25Ti (WYT) were fabricated by ball milling and spark plasma sintering aiming at formation of oxide dispersoids with different crystallographic structures. Thermal stability of both ODS-W alloys was evaluated in terms of microhardness and microstructure evolution during isothermal aging at 1100 degrees C. Dispersoids of sesquioxide Y2O3 were identified in sintered WY, while pyrochlore Y2Ti2O7 with finer size and higher number density were developed in sintered WYT, resulting in higher bending strength of 1020 MPa and microhardness of 880 HV. Compared with sesquioxide Y2O3, complex dispersoids of pyrochlore Y2Ti2O7 exhibited much better coarsening resistance during isothermal aging at 1100 degrees C up to 100 h, where the intracrystalline and GB dispersoids maintained around 10 nm and 30 nm, respectively. The excellent coarsening resistance of complex Y2Ti2O7 with pyrochlore structure contributed to grain refinement and improved microstructure stability of WYT due to the effect of Zener drag.
Keyword ：
Mechanical alloying Mechanical alloying Tungsten alloy Tungsten alloy Complex oxide dispersoid Complex oxide dispersoid Thermal stability Thermal stability Microhardness Microhardness
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| GB/T 7714 | Wang, Man , Wang, Zijian , Qiu, Jinhui et al. Improvement in thermal stability of ODS-W alloy through formation of complex oxide dispersoids [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2024 , 1002 . |
| MLA | Wang, Man et al. "Improvement in thermal stability of ODS-W alloy through formation of complex oxide dispersoids" . | JOURNAL OF ALLOYS AND COMPOUNDS 1002 (2024) . |
| APA | Wang, Man , Wang, Zijian , Qiu, Jinhui , Xi, Xiaoli , Nie, Zuoren . Improvement in thermal stability of ODS-W alloy through formation of complex oxide dispersoids . | JOURNAL OF ALLOYS AND COMPOUNDS , 2024 , 1002 . |
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Abstract ：
This paper describes a new process for the separation and recovery of refractory metal carbides. Zinc was used as the working electrode and collector of the electrolysis products. The electrolysis products were obtained by constant current electrolysis at a temperature of 775 degrees C. The electrolysis products were then subjected to zinc smelting. The Co-W alloy is removed by static precipitation and high temperature liquid phase separation, and the tungsten is separated and extracted.
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| GB/T 7714 | Zhang, Ji , Zhang, Liwen , Xi, Xiaoli et al. A New Method of Tungsten Extraction by Liquid Cathode Molten Salt Electrolysis-Zinc Melt Separation [J]. | METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE , 2024 . |
| MLA | Zhang, Ji et al. "A New Method of Tungsten Extraction by Liquid Cathode Molten Salt Electrolysis-Zinc Melt Separation" . | METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE (2024) . |
| APA | Zhang, Ji , Zhang, Liwen , Xi, Xiaoli , Nie, Zuoren , Fang, Qi , Liu, Chunjia . A New Method of Tungsten Extraction by Liquid Cathode Molten Salt Electrolysis-Zinc Melt Separation . | METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE , 2024 . |
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Abstract ：
Tungsten trioxide is a promising photoelectric material owing to its abundant structures and unique properties, but the serious photogenerated charge recombination limits its photocatalytic and photoelectrochemical performance. Herein, 0D Cu2O was anchored onto 3D WO3 in-situ via a facile adsorption-ascorbic acid reduction method at room temperature. The coupling of WO3 with Cu2O produces improved charge separation efficiency, thereby the photocatalytic degradation rate and transient photocurrent of optimal WO3/Cu2O are 2.7 and 1.6 times higher than those of WO3, respectively. The enhanced performance is ascribed to the formation of a p-n heterojunction, which was demonstrated by experimental characterizations and theoretical calculation.
Keyword ：
Cu2O Cu2O WO3 WO3 Photoelectric performance Photoelectric performance p-n junction p-n junction Reduction Reduction
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| GB/T 7714 | Shen, Yuegang , Liu, Yangsi , Xi, Xiaoli et al. Anchoring Cu2O onto WO3 by adsorption-ascorbic acid reduction: A p-n junction with improved photocatalytic and photoelectrochemical properties [J]. | OPTICAL MATERIALS , 2024 , 155 . |
| MLA | Shen, Yuegang et al. "Anchoring Cu2O onto WO3 by adsorption-ascorbic acid reduction: A p-n junction with improved photocatalytic and photoelectrochemical properties" . | OPTICAL MATERIALS 155 (2024) . |
| APA | Shen, Yuegang , Liu, Yangsi , Xi, Xiaoli , Nie, Zuoren . Anchoring Cu2O onto WO3 by adsorption-ascorbic acid reduction: A p-n junction with improved photocatalytic and photoelectrochemical properties . | OPTICAL MATERIALS , 2024 , 155 . |
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Abstract ：
In this study, LiNi0.8Co0.15Al0.05O2@x%Al(2)O(3-)coated cathode materials were regeneratively compounded by the solid-phase sintering method, and their structural characterization and electrochemical performance were systematically analyzed. The regenerated ternary cathode material precursor synthesized by the co-precipitation method was roasted with lithium carbonate at a molar ratio of 1:1.1, and then completely mixed with different contents of aluminum hydroxide. The combined materials were then sintered at 800 & DEG;C for 15 h to obtain the regenerated coated cathode material, LiNi0.8Co0.15Al0.05O2@x%Al2O3. The thermogravimetry analysis, phase composition, morphological characteristics, and other tests show that when the added content of aluminum hydroxide is 3%, the regenerated cathode material, LiNi0.8Co0.15Al0.05O2@1.5%Al2O3, exhibits the highest-order layered structure with Al2O3 coating. This material can better inhibit the production of Ni2+, and improve material structure and electrochemical properties. The first charge-discharge efficiency of the battery assembled with this regenerated cathode material is 97.4%, a 50-cycle capacity retention is 93.4%, and a 100-cycle capacity retention is 87.6%. The first charge-discharge efficiency is far better than that of the uncoated regenerated battery.
Keyword ：
coated cathode materials coated cathode materials regeneration regeneration spent power lithium-ion battery spent power lithium-ion battery solid phase sintering solid phase sintering
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| GB/T 7714 | Ma, Liwen , Liu, Guangyun , Wang, Yuehua et al. Preparation and Performance of Regenerated Al2O3-Coated Cathode Material LiNi0.8Co0.15Al0.05O2 from Spent Power Lithium-Ion Batteries [J]. | MOLECULES , 2023 , 28 (13) . |
| MLA | Ma, Liwen et al. "Preparation and Performance of Regenerated Al2O3-Coated Cathode Material LiNi0.8Co0.15Al0.05O2 from Spent Power Lithium-Ion Batteries" . | MOLECULES 28 . 13 (2023) . |
| APA | Ma, Liwen , Liu, Guangyun , Wang, Yuehua , Xi, Xiaoli . Preparation and Performance of Regenerated Al2O3-Coated Cathode Material LiNi0.8Co0.15Al0.05O2 from Spent Power Lithium-Ion Batteries . | MOLECULES , 2023 , 28 (13) . |
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Abstract ：
In this study, spent WO3/V2O5-TiO2 catalysts used for selective catalytic reduction were treated by a hydrometallurgical process to comprehensively recover valuable metallic elements, such as W, V, and Ti. Al and Si impurities were preferentially removed by selective microwave-assisted alkali leaching. W and V were leached by enhanced high-pressure leaching with efficiencies estimated at 95% and 81%. The leaching of W and V followed the nuclear shrinkage model controlled by the combination of product layer diffusion and interfacial chemical reaction. A synergistic extraction was applied to separate W and V using an extractant mixture of di-(2-ethylhexyl)phosphoric acid P204 and the primary amine N1923. The extraction efficiencies of V and W reached 86.5% and 6.3%, respectively, with a separation coefficient (V/W) of 95.30. The product was precipitated after extraction to yield ammonium paratungstate (APT) and NH4VO3. The TiO2 catalyst carrier residue meets commercial specifications for reuse. This comprehensive recovery process with the characteristics of high-pressure leaching and synergistic extraction realizes the resourceful utilization of the spent catalysts. (sic)(sic)(sic)(sic)(sic)湿(sic)冶(sic)(sic)艺处(sic)(sic)(sic)(sic)(sic)(sic)催(sic)(sic)(sic)(sic)(sic)WO3/V2O5-TiO2 催(sic)剂?(sic)(sic)(sic) (sic)(sic)(sic)(sic)(sic)W?V (sic)Ti (sic)(sic)(sic)(sic)(sic).(sic)(sic)(sic)(sic)(sic)(sic)微(sic)辅(sic)碱浸(sic)(sic)(sic)Al (sic)Si (sic)(sic)?(sic)(sic)(sic)(sic)压(sic)(sic)浸 (sic)W (sic)V?浸(sic)(sic)(sic)(sic)(sic)95%(sic)81%.W (sic)V (sic)(sic)压浸(sic)符(sic)(sic)(sic)缩(sic)(sic)?(sic)(sic)(sic)(sic)扩(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic) (sic)(sic)(sic).(sic)(sic)(sic)(2-乙(sic)己(sic))磷酸(P204?(sic)(sic)胺(N1923?(sic)W (sic)V (sic)浸(sic)溶液(sic)(sic)(sic)(sic)萃(sic)?V (sic)W (sic)萃(sic) (sic)(sic)(sic)(sic)(sic)(sic)86.5%(sic)6.3%?(sic)(sic)(sic)(sic)(V/W?(sic)95.30.萃(sic)(sic)萃(sic)(sic)溶液(sic)(sic)(sic)(sic)淀?(sic)(sic)仲钨酸铵(APT? (sic)NH4VO3.(sic)压浸(sic)残余(sic)TiO2 (sic)(sic)符(sic)(sic)(sic)(sic)(sic)(sic).(sic)(sic)(sic)(sic)(sic)(sic)艺(sic)(sic)压浸(sic)(sic)(sic)(sic)萃(sic)(sic)(sic)(sic)?(sic)(sic)(sic) (sic)催(sic)剂(sic)(sic)(sic)(sic)(sic)(sic).
Keyword ：
Synergistic extraction Synergistic extraction Comprehensive recovery Comprehensive recovery Microwave leaching Microwave leaching Pressure leaching Pressure leaching Spent selective catalytic reduction (SCR) catalysts Spent selective catalytic reduction (SCR) catalysts
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| GB/T 7714 | Ma, Li-Wen , Xi, Xiao-Li , Chen, Jia-Peng et al. Comprehensive recovery of W, V, and Ti from spent selective reduction catalysts [J]. | RARE METALS , 2023 , 42 (10) : 3518-3531 . |
| MLA | Ma, Li-Wen et al. "Comprehensive recovery of W, V, and Ti from spent selective reduction catalysts" . | RARE METALS 42 . 10 (2023) : 3518-3531 . |
| APA | Ma, Li-Wen , Xi, Xiao-Li , Chen, Jia-Peng , Guo, Fan , Yang, Zi-Jie , Nie, Zuo-Ren . Comprehensive recovery of W, V, and Ti from spent selective reduction catalysts . | RARE METALS , 2023 , 42 (10) , 3518-3531 . |
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Abstract ：
Constructing homojunction hierarchical nanostructures with intimate contact and favorable carriers separation is an effective and challenging strategy to obtain efficient photocatalysts. We here report an immobilized WO3/ W18O49 homojunction photocatalyst with W18O49 branches growing out of WO3 trunks. Under simulated sunlight irradiation, the optimal WO3/W18O49 composite exhibits enhanced adsorption and photocatalytic performance, which are 10.69 and 3.61 times higher than those of WO3, respectively. The superior performance is ascribed to the well-distributed trunk-branch structure, surface charge and effective charge transfer and separation in the homojunction composites, which was verified by experimental characterizations and the density functional theory (DFT) calculation. This work provides a solid foundation for further study and may give rise to the design of other photocatalysts.
Keyword ：
Photocatalysis Photocatalysis WO3 WO3 Trunk-branch structure Trunk-branch structure Homojunction Homojunction Adsorption Adsorption
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| GB/T 7714 | Shen, Yuegang , Liu, Yangsi , Xi, Xiaoli et al. Immobilized WO3/W18O49 trunk-branch nanostructure: A homojunction improved adsorption and photocatalytic performance [J]. | OPTICAL MATERIALS , 2023 , 138 . |
| MLA | Shen, Yuegang et al. "Immobilized WO3/W18O49 trunk-branch nanostructure: A homojunction improved adsorption and photocatalytic performance" . | OPTICAL MATERIALS 138 (2023) . |
| APA | Shen, Yuegang , Liu, Yangsi , Xi, Xiaoli , Nie, Zuoren . Immobilized WO3/W18O49 trunk-branch nanostructure: A homojunction improved adsorption and photocatalytic performance . | OPTICAL MATERIALS , 2023 , 138 . |
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