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学者姓名：王金淑
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摘要 ：
An innovative method is created for transforming iron-rich RO phase (MgO0.239FeO0.761) on steel slag surface into nanostructured Mg0.04Fe2.96O4 layer. The phase change process is investigated, and it is found that salicylic acid modification and alkaline roasting procedures remarkably increase the specific surface area from 0.46 m2/g (raw steel slag) to 69.5 m2/g (Mg0.04Fe2.96O4), and the generation of Mg0.04Fe2.96O4 enhances the absorption of visible light and Cr(VI) conversion with 2-times increasement than raw steel slag. Surface complexation between H2C2O4 ligands and Fe metal moiety on Mg0.04Fe2.96O4 induces the intramolecular electron transfer under visible light irradiation based on a ligand-to-metal charge transfer mechanism, thus resulting in Cr(VI) photoreduction, and the catalytic efficiency is above 90% for Cr(VI) (40 mg/L) under inherent pH= 5.5 conditions. Moreover, recyclability tests based on magnetic separation show that the photoreactivity is closely related to Mg content of Mg0.04Fe2.96O4 layer where Mg leaching occurs and finally generates cubic spinel configuration Fe3O4. This work highlights the importance of surface functionalization in post-use phases of steel slag in which surface reactivity and application potential can be greatly altered by chemical exposure history and surface transformations. It also provides valuable references for studying the metastable state mechanism of magnesium ferrite photocatalysts.
关键词 ：
Cr(VI) reduction Cr(VI) reduction Magnesium ferrite Magnesium ferrite Steel Slag Steel Slag
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| GB/T 7714 | Sun, Lingmin , Wu, Junshu , Wang, Jinshu et al. In-situ constructing nanostructured magnesium ferrite on steel slag for Cr (VI) photoreduction [J]. | JOURNAL OF HAZARDOUS MATERIALS , 2022 , 422 . |
| MLA | Sun, Lingmin et al. "In-situ constructing nanostructured magnesium ferrite on steel slag for Cr (VI) photoreduction" . | JOURNAL OF HAZARDOUS MATERIALS 422 (2022) . |
| APA | Sun, Lingmin , Wu, Junshu , Wang, Jinshu , Yang, Yilong , Xu, Meng , Liu, Jingchao et al. In-situ constructing nanostructured magnesium ferrite on steel slag for Cr (VI) photoreduction . | JOURNAL OF HAZARDOUS MATERIALS , 2022 , 422 . |
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摘要 ：
锇靶是制备M型阴极常用的一类靶材,须具有纯度高、致密度高、晶粒细小等特性,然而,传统工艺烧结因烧结温度较高获得的靶材晶粒较粗大,对阴极覆膜沉积不利.本研究对锇粉模压成圆饼压坯,之后采用微波烧结压坯.微波烧结锇压坯过程中以碳化硅、氧化锆作为辅助加热材料,氧化铝作为保温材料,升温速率在20～30 min/℃之间.结果 表明,当随着压强从100增加到300MPa,微波烧结1500℃保温60 min后,样品相对密度从80.61％快速增加到93.44％.当压强继续增加到400MPa时,相对密度随着压强的增长变缓达到94.25％.当压强从400增加到500MPa,烧结后样品的相对密度增长不明显,并有裂纹出现.锇烧结体的相对密度和直径收缩率随着保温时间的延长先快速增加,然后缓慢增加,最后增加趋于平缓.在微波烧结1500℃下,随着保温时间的延长直径收缩率从11.67％快速增加到14.99％,然后缓慢增加到15.56％,相对密度从87.97％快速增加到93.78％,然后缓慢增加到94.25％,而孔隙的数量和尺寸随着保温时间的延长而减小,最终呈球形,晶粒尺寸在1 μm左右.
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| GB/T 7714 | 李世磊 , 刘伟 , 王金淑 et al. 微波烧结锇的初步研究 [J]. | 真空电子技术 , 2021 , (3) : 54-59 . |
| MLA | 李世磊 et al. "微波烧结锇的初步研究" . | 真空电子技术 3 (2021) : 54-59 . |
| APA | 李世磊 , 刘伟 , 王金淑 , 周帆 , 谢元峰 , 夏扬 et al. 微波烧结锇的初步研究 . | 真空电子技术 , 2021 , (3) , 54-59 . |
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摘要 ：
为了更好地低成本处理水体中的氨氮、硫等污染物,对天然矿物蛭石颗粒进行NaCl层间处理、对火山岩颗粒进行FeCl_3表面处理。利用扫描电镜、X射线衍射、红外光谱等手段对矿物颗粒进行表征;同时研究蛭石和火山岩处理前后对氨氮、硫的吸附性能,分析讨论2种矿物颗粒对氨氮、硫的吸附机理。结果表明:在最佳条件下,Na化蛭石对氨氮的吸附容量由原来的21.4 mg/g提高到29.3 mg/g,对水体中氨氮的去除率由86.7%提高到93.4%;改性火山岩对硫化物的吸附容量由原来的3.1 mg/g提高到36.9 mg/g;蛭石颗粒对氨氮的去除以物理吸附为主,火山岩颗粒对硫的吸附以化学吸附为主。
关键词 ：
火山岩 火山岩 氨氮吸附 氨氮吸附 蛭石 蛭石 表面修饰 表面修饰
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| GB/T 7714 | 杜玉成 , 史默涵 , 林彭辉 et al. 基于水体中氨氮、硫净化矿物颗粒的制备与性能 [J]. | 中国粉体技术 , 2021 , 27 (06) : 19-28 . |
| MLA | 杜玉成 et al. "基于水体中氨氮、硫净化矿物颗粒的制备与性能" . | 中国粉体技术 27 . 06 (2021) : 19-28 . |
| APA | 杜玉成 , 史默涵 , 林彭辉 , 李杨 , 甄爽 , 马延龙 et al. 基于水体中氨氮、硫净化矿物颗粒的制备与性能 . | 中国粉体技术 , 2021 , 27 (06) , 19-28 . |
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摘要 ：
Heavy metal ions pollution has caused worldwide attention due to its toxicity to people's health. Existing as chromate anions, Cr(VI) is difficult to remove from polluted water. Owing to their low cost, stability, environmentally benign nature, and excellent properties, silicate materials are widely used in catalysis and adsorption. In this work, magnesium silicates with sepiolite and talc phase were synthesized through facile hydrothermal route using diatomite as substrate and silicon source. The Cr removal capacity of wire-like Mg4Si6O15(OH)2diatomite exhibited a Cr adsorption capacity of 1292 mg/g, which was much higher than the other reported inorganic adsorbents. The adsorption followed Freundlich and Temkin models well, indicating that Cr species adsorbed onto adsorbent was a favorable, exothermic multilayer chemisorption process. The first-principles density functional theory (DFT) calculation results revealed the interaction between adsorptive sites of adsorbents and Cr species, also demonstrated ion-exchange behavior between interlayer Mg ion and Cr(III). We believe these low-cost synthesized adsorbents have great potentials for practical applications in the treatment of heavy metal ions polluted wastewater.
关键词 ：
Adsorption capacity Adsorption capacity Adsorption mechanism Adsorption mechanism First-principles density functional theory (DFT) First-principles density functional theory (DFT) Heavy metal ions Heavy metal ions Magnesium silicate Magnesium silicate
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| GB/T 7714 | Wang, Xuekai , Wang, Jinshu , Teng, Weili et al. Fabrication of highly efficient magnesium silicate and its adsorption behavior towards Cr(VI) [J]. | MICROPOROUS AND MESOPOROUS MATERIALS , 2021 , 323 . |
| MLA | Wang, Xuekai et al. "Fabrication of highly efficient magnesium silicate and its adsorption behavior towards Cr(VI)" . | MICROPOROUS AND MESOPOROUS MATERIALS 323 (2021) . |
| APA | Wang, Xuekai , Wang, Jinshu , Teng, Weili , Du, Yucheng , Wu, Junshu , Guo, Fan et al. Fabrication of highly efficient magnesium silicate and its adsorption behavior towards Cr(VI) . | MICROPOROUS AND MESOPOROUS MATERIALS , 2021 , 323 . |
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摘要 ：
Molybdenum disulfide coated aluminum alloys are of great interests in recent years due to their wide application in the space field. In this paper, a 350-400 nm-thick MoS2 film with nano-flowers structure was produced on Porous anodic aluminum oxide (AAO)/Al substrate by magnetron sputtering. It is found that AAO aperture array on aluminum alloy could enhance the resistance of stress and deformation for aluminum matrix, and store the MoS2 within the aperture during friction, resulting into prolonged lubrication time. Significant improvement in the lubrication performance (316.6 x) at low friction coefficient (0.15) was realized compared with MoS2/Al structure, and the wear rate decreased by similar to 98%. Our findings could provide new routes of surface modification for aluminum alloys in aerospace field.
关键词 ：
AAO aperture array AAO aperture array Magnetron sputtering Magnetron sputtering Molybdenum disulfide Molybdenum disulfide MoS2 nano-flowers MoS2 nano-flowers
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| GB/T 7714 | He, Jiawei , Zhou, Wenyuan , Chen, Shuqun et al. Tribological properties of MoS2 nano-flowers supported by porous alumina aperture array [J]. | TRIBOLOGY INTERNATIONAL , 2021 , 161 . |
| MLA | He, Jiawei et al. "Tribological properties of MoS2 nano-flowers supported by porous alumina aperture array" . | TRIBOLOGY INTERNATIONAL 161 (2021) . |
| APA | He, Jiawei , Zhou, Wenyuan , Chen, Shuqun , Wu, Anran , Zhou, Yuqing , Chen, Yanhui et al. Tribological properties of MoS2 nano-flowers supported by porous alumina aperture array . | TRIBOLOGY INTERNATIONAL , 2021 , 161 . |
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摘要 ：
In this work, a synergistic strategy integrated elemental doping and defect engineering has been developed to modulate the electronic and bandgap structure of g-C3N4 by controlling its conjugated aromatic system. Experimental analysis and theoretical calculations conrm that the generation of imbalanced spatial distributions of charge carriers not only greatly increases the π-electron availability, but also decreases the energy barrier for hydrogen adsorption due to the synergistic effect of the high valence electron of the W dopant and the decreased electronegativity by two-coordinated nitrogen defects, which strengthens the charge transfer efficiency and favors the light capturing capability. The combined benets of the electronic, optical and textural modification lead to a signicant improvement of photocatalytic activity of 3.3 mmol h−1 g−1 for hydrogen evolution under λ ≥ 400 nm light irradiation, about twentyfold enhancement than that of pristine g-C3N4. Such proposed synergistic strategy provides a promising route to promote the performance of g-C3N4 for potential applications in solar energy conversion. © 2020 Hydrogen Energy Publications LLC
关键词 ：
Carbon nitride Carbon nitride Carrier mobility Carrier mobility Charge transfer Charge transfer Chemical bonds Chemical bonds Defects Defects Electronegativity Electronegativity Energy conversion Energy conversion Energy efficiency Energy efficiency Gas adsorption Gas adsorption Irradiation Irradiation Light Light Photocatalytic activity Photocatalytic activity Solar energy Solar energy
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| GB/T 7714 | Che, Haibing , Hu, Peng , Wang, Jinshu et al. Synergistic enhancement of π-electron density in graphitic carbon nitride for significantly improved photocatalytic hydrogen evolution under visible-light irradiation [J]. | International Journal of Hydrogen Energy , 2021 , 46 (12) : 8486-8496 . |
| MLA | Che, Haibing et al. "Synergistic enhancement of π-electron density in graphitic carbon nitride for significantly improved photocatalytic hydrogen evolution under visible-light irradiation" . | International Journal of Hydrogen Energy 46 . 12 (2021) : 8486-8496 . |
| APA | Che, Haibing , Hu, Peng , Wang, Jinshu , Li, Yongli , Zhou, Wenyuan , Chen, Xiaobo . Synergistic enhancement of π-electron density in graphitic carbon nitride for significantly improved photocatalytic hydrogen evolution under visible-light irradiation . | International Journal of Hydrogen Energy , 2021 , 46 (12) , 8486-8496 . |
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摘要 ：
采用液–固掺杂结合两步氢还原法分别制备未添加和添加质量分数0.1％和1.0％Fe的金属W粉,研究了微量Fe元素对WO3还原过程及产物结构特征的影响.结果表明:WO3前驱体粉体经掺杂和煅烧处理后,在其颗粒表层晶格中形成了含Fe固溶体;在氢气还原过程中,Fe的固溶能够降低WO2.9→WO2和WO2→W的还原温度,促进WO3中裂纹和空隙的产生,细化还原W粉尺寸;还原后Fe元素由偏聚在WO3颗粒表面迁移到W颗粒内部,其分布规律发生了明显转变.
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| GB/T 7714 | 陈树群 , 胡海栋 , 周文元 et al. 微量Fe元素对氧化钨粉还原过程的影响 [J]. | 粉末冶金技术 , 2021 , 39 (3) : 209-215 . |
| MLA | 陈树群 et al. "微量Fe元素对氧化钨粉还原过程的影响" . | 粉末冶金技术 39 . 3 (2021) : 209-215 . |
| APA | 陈树群 , 胡海栋 , 周文元 , 胡鹏 , 李洪义 , 王金淑 . 微量Fe元素对氧化钨粉还原过程的影响 . | 粉末冶金技术 , 2021 , 39 (3) , 209-215 . |
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摘要 ：
采用微波烧结技术制备锇(Os)烧结体,研究了生坯压制压强和微波烧结主要工艺参数(升温速率、烧结温度和保温时间)对Os烧结体组织结构和相对密度的影响规律,分析了微波烧结致密化的机理.结果表明,1350℃微波烧结后Os平均晶粒尺寸约0.22μm,与粉体颗粒尺寸差别不大;随着烧结温度增加到1500℃,晶粒尺寸长大到0.76μm.1500℃烧结时,延长保温时间,Os烧结体的相对密度先快速增加,后缓慢增加.1500℃微波烧结60 min后,Os烧结体相对密度为94.3％,平均粒径小于1μm.烧结动力学分析表明,Os的致密化过程是体积扩散和晶界扩散共同作用的结果,随着烧结温度的升高,扩散机制从晶界扩散逐渐向体积扩散转变.
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| GB/T 7714 | 刘伟 , 李世磊 , 周帆 et al. 微波烧结锇的工艺研究及动力学分析 [J]. | 粉末冶金技术 , 2021 , 39 (5) : 394-402 . |
| MLA | 刘伟 et al. "微波烧结锇的工艺研究及动力学分析" . | 粉末冶金技术 39 . 5 (2021) : 394-402 . |
| APA | 刘伟 , 李世磊 , 周帆 , 杨韵斐 , 谢元峰 , 夏扬 et al. 微波烧结锇的工艺研究及动力学分析 . | 粉末冶金技术 , 2021 , 39 (5) , 394-402 . |
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摘要 ：
Hetematom-doped hierarchically porous carbon is attractive electrode material for supercapacitors. However, it still remains a great challenge to develop a high-performance supercapacitor electrode with efficient preparation strategy. Herein, we report a N,O-codoped hierarchically porous carbon (NOHPC) prepared through one-step carbonization/in-situ doping/activation process by using natural diatomite as template and polydopamine as precursor. The as-prepared NOHPC possesses synergistic advantages of abundant redox-active N,O dopants, large effective specific surface area and hierarchically porous (micropores, mesopores and macropores) structure. Benefiting from such advantages, the NOHPC electrode exhibits an extremely high specific capacitance of 436.0 F g(-1) at 0.625 A g(-1) in H2SO4 electrolyte. The as-assembled supercapacitor in H2SO4 electrolyte also yields high specific capacitance (328.3 F g(-1) at 0.625 A g(-1)), excellent rate performance (74.8% capacitance retention, 0.625-25 A g(-1)) and superb cycling stability (93.9%, 10,000 cycles). Besides, the corresponding device in Na2SO4 electrolyte can present an enhanced energy density of 23.4 Wh kg(-1) at the power density of 358.8 W kg(-1) (1 A g(-1)) and still maintain 15.0 Wh kg(-1) at the power density of 8357.8 W kg(-1) (25 A g(-1)). The outstanding electrochemical performance and the efficient preparation process of NOHPC make it a promising widely applied electrode material for supercapacitor.
关键词 ：
Diatomite biotemplate Diatomite biotemplate Heteroatom-doped Heteroatom-doped Hierarchically porous carbon Hierarchically porous carbon High specific capacitance High specific capacitance Supercapacitor Supercapacitor
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| GB/T 7714 | Teng, Weili , Zhou, Qinqin , Wang, Xuekai et al. Biotemplating preparation of N,O-codoped hierarchically porous carbon for high-performance supercapacitors [J]. | APPLIED SURFACE SCIENCE , 2021 , 566 . |
| MLA | Teng, Weili et al. "Biotemplating preparation of N,O-codoped hierarchically porous carbon for high-performance supercapacitors" . | APPLIED SURFACE SCIENCE 566 (2021) . |
| APA | Teng, Weili , Zhou, Qinqin , Wang, Xuekai , Che, Haibing , Du, Yucheng , Hu, Peng et al. Biotemplating preparation of N,O-codoped hierarchically porous carbon for high-performance supercapacitors . | APPLIED SURFACE SCIENCE , 2021 , 566 . |
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摘要 ：
Metastable phase in tungsten film is of great interests in recent years due to its giant spin Hall effects, however, little information has been known on its nucleation, growth and phase transformation. In this paper, a 900 nm-thick tungsten film with double-layer structure (α-W underlayer and β-W above it) was produced on SiO2/Si substrate by high vacuum magnetron sputtering at room temperature. The structural properties of β-W were systemically investigated by X-ray diffraction, transmission electron microscopy, thermodynamic calculation, first-principle and phase-field simulations. It is found that the β-W nucleation is energetically favoured on the SiO2 surface compared to the α-W one. As the film thickening proceeds, β-W[211] turns to be preferred direction of growth owing to the elastic strain energy minimization, which is verified by phase-field simulations. Moreover, the β→α phase transformation takes place near the film-substrate interface while the rest of the film keeps the β-W phase, leading to a double-layer structure. This localized phase transition is induced by lower Gibbs free energy of α-W phase at larger grain sizes, which can be confirmed by thermodynamic calculation. Further in-situ heating TEM analysis of the as-deposited film reveals that the β→α phase transformation is fulfilled by α/β interface propagation rather than local atomic rearrangements. Our findings offer valuable insights into the intrinsic properties of metastable phase in tungsten. © 2021
关键词 ：
Crystallization Crystallization Film growth Film growth Free energy Free energy Gibbs free energy Gibbs free energy Grain growth Grain growth High resolution transmission electron microscopy High resolution transmission electron microscopy Metastable phases Metastable phases Nucleation Nucleation Silica Silica Silicon Silicon Spin Hall effect Spin Hall effect Strain energy Strain energy Tungsten Tungsten
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| GB/T 7714 | Chen, Shuqun , Wang, Jinshu , Wu, Ronghai et al. Insights into the nucleation, grain growth and phase transformation behaviours of sputtered metastable β-W films [J]. | Journal of Materials Science and Technology , 2021 , 90 : 66-75 . |
| MLA | Chen, Shuqun et al. "Insights into the nucleation, grain growth and phase transformation behaviours of sputtered metastable β-W films" . | Journal of Materials Science and Technology 90 (2021) : 66-75 . |
| APA | Chen, Shuqun , Wang, Jinshu , Wu, Ronghai , Wang, Zheng , Li, Yangzhong , Lu, Yiwen et al. Insights into the nucleation, grain growth and phase transformation behaviours of sputtered metastable β-W films . | Journal of Materials Science and Technology , 2021 , 90 , 66-75 . |
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