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学者姓名：席晓丽
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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 ：
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 ：
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 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 ：
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 , 55 (6) : 4110-4114 . |
| 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 55 . 6 (2024) : 4110-4114 . |
| 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 , 55 (6) , 4110-4114 . |
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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 ：
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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Abstract ：
含钼合金具有较高的硬度、优异的耐磨耐腐蚀性能和催化析氢性能,作为涂层和电极材料在金属防护、电解水制氢等领域得到了广泛的应用.电沉积法具有沉积速度快、沉积镀层致密及产物种类多等优点,是制备含钼合金的重要技术之一.早期电沉积法用于制备二元含钼合金,对其电沉积工艺及机理的研究较为深入,但通过调整工艺参数的方法对二元含钼合金性能的提高仍旧有限.为了改善二元含钼合金的性能,添加合金元素制备多元含钼合金以及添加粒子制备粒子掺杂含钼合金成为近年的研究热点和趋势.多元含钼合金中添加的元素主要包括C、Fe、P、W、Cr等,能有效改善其不同方面的性能.改善催化析氢性能的元素有C、Zn、Sn、S、Fe、P等,其机理在于它们与铁族元素和钼元素能产生协同作用;提高显微硬度和耐磨耐腐蚀性能的元素有W、Cr、P等,其机理在于它们能改变合金结构,造成晶格畸变.粒子掺杂含钼合金中添加的粒子主要有ZrO2、TiO2、SiC、TiN等,能显著改善合金的显微硬度和耐磨耐腐蚀性能,这是因为纳米颗粒能在合金基质中弥散分布,起到细化晶粒及阻碍位错运动的作用.近两年,磁场、超声波辅助电沉积的工艺被大量应用到粒子掺杂含钼合金的制备中,实现了合金性能与电流效率的双提升.本文总结了近年来电沉积法制备含钼合金的研究进展,分别对二元含钼合金(如Ni-Mo和Co-Mo合金)、三元含钼合金(如Ni-Mo-Zn和Co-Mo-P合金)以及粒子掺杂合金(如Ni-Mo-ZrO2和Co-Mo-TiO2合金)的电沉积制备工艺、原理及合金性能等进行介绍,总结归纳了合金元素以及粒子掺杂改善含钼合金的异同点,分析了目前电沉积法制备含钼合金存在的问题及发展前景,以期为制备出性能更优异、应用更广泛的含钼合金提供参考.
Keyword ：
二元含钼合金 二元含钼合金 多元含钼合金 多元含钼合金 粒子掺杂 粒子掺杂 电沉积 电沉积 稀土 稀土
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| GB/T 7714 | 田娅 , 马立文 , 席晓丽 . 电沉积法制备含钼合金的研究进展 [J]. | 材料导报 , 2023 , 37 (3) : 181-187 . |
| MLA | 田娅 et al. "电沉积法制备含钼合金的研究进展" . | 材料导报 37 . 3 (2023) : 181-187 . |
| APA | 田娅 , 马立文 , 席晓丽 . 电沉积法制备含钼合金的研究进展 . | 材料导报 , 2023 , 37 (3) , 181-187 . |
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Abstract ：
该文简要回顾我国工程教育专业认证的历史发展,阐述认证的核心理念.综合分析目前国内高校材料科学与工程专业的工程教育认证现状,并针对目前普遍存在的问题进行剖析.基于工程教育专业认证理念和标准要求,北京工业大学材料科学与工程专业以两轮认证考察为契机,推动人才培养模式改革,对培养目标、毕业要求、课程体系进行重新梳理及修订,完善毕业要求达成度、课程目标达成度评价、学生能力达成的记录形成性评价方法.改革措施取得显著成效.
Keyword ：
工程教育专业认证 工程教育专业认证 材料科学与工程 材料科学与工程 教学实践 教学实践 北京工业大学 北京工业大学 教学改革 教学改革
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| GB/T 7714 | 贾延琳 , 崔素萍 , 席晓丽 et al. 工程教育认证背景下材料科学与工程专业教学改革与实践 [J]. | 高教学刊 , 2023 , 9 (21) : 128-131 . |
| MLA | 贾延琳 et al. "工程教育认证背景下材料科学与工程专业教学改革与实践" . | 高教学刊 9 . 21 (2023) : 128-131 . |
| APA | 贾延琳 , 崔素萍 , 席晓丽 , 高峰 , 郭福 . 工程教育认证背景下材料科学与工程专业教学改革与实践 . | 高教学刊 , 2023 , 9 (21) , 128-131 . |
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