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Template-free preparation of porous Co microfibers from spent lithium-ion batteries as a promising microwave absorber

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Rare Metals 2022年第10期41卷 3475-3485页

作者： Xiao-Min Wu Fei Xie yong-lin yao Yue Sun Zhong-Sheng Hua Zhuo Zhao yong-Xiang Yang Anhui Province Key Laboratory of Metallurgical Engineering&Resources Recycling School of Metallurgical EngineeringAnhui University of TechnologyMaanshan243002China Department of Materials Science and Engineering Delft University of TechnologyDelft2628CDNetherlands

In order to take full advantage of the secondary resources,in this paper,we reported a template-free process to prepare porous Co microfibers from spent lithiumion batteries(LIBs).First,the waste LiCoO_(2) powders were leached by oxalic acid at a suitable temperature,and rodlike cobalt oxalate powders were ***,the porous Co microfibers were prepared by using the cobalt oxalate as precursors through a thermal decomposition at420 ℃ under nitrogen *** prepared Co microfibers possess diameters of 1-2 μm,and each microfiber consists of small particles with size of100-200 *** Co microfibers(25 wt%)/paraffin composite exhibited excellent microwave absorption *** the sample thickness is 4.5 mm,the reflection losses reach-36.14 and-38.20 dB at 4.16 and 17.60 GHz,respectively,and the effective bandwidth reaches up to 5.52 *** indicates that the Co microfibers can be used as a promising microwave ***,this paper demonstrates a novel process to make a high value-added product through recycling from the spent lithium-ion *** addition,it is advantageous to eliminate the hazard of spent lithium-ion batteries and electromagnetic radiation to environment and human health.

关键词： Spent lithium-ion batteries(LIBs) Co microfibers Recycling Oxalic acid leaching Microwave absorption

Preparation of Chromium-iron Metal Powder from Chromium Slag by Reduction Roasting and Magnetic Separation

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Journal of Iron and Steel Research International 2015年第9期22卷 771-776页

作者： Hong-ming LONG Qing-min MENG Ping WANG Tie-jun CHUN yong-lin yao School of Metallurgical Engineering Anhui University of Technology

Chromium slag（CS）has become one of the most hazardous solid waste containing chromium and *** on its characteristics,the technology of reduction roasting and magnetic separation was employed to treat *** major impurity element of CS is magnesium and it exists in magnesium ferrite phase,which is hard to recover iron in the absence of *** reduction roasting,additives（Al2O3and CaF2）could destroy the structure of magnesium ferrite and improve the iron grade and *** final product,***-iron powder,contains 72.54% Fe and 13.56% Cr,with the iron recovery of 80.34% and chromium recovery of 80.70%.

关键词： chromium slag reduction roasting magnetic separation chromium-iron metal powder

Analysis on geological structures influencing gas occurrence at Qidong coalmine

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Journal of Coal Science & Engineering(China) 2010年第3期16卷 292-295页

作者： WU Shi-yong HU Bao-lin yao Duo-xi ZHANG De-sheng School of Earth Science and Environmental Engineering Anhui University of Science ＆ Technology Huainan 232001 China

The occurrence state of methane is mostly controlled by coalfield *** coal-bearing strata at Qidong coalmine experienced many tectonic cyclessince their *** gas content made by the complicated structural geologic systemat the coalfield is very different, which is obviously higher on the north side of the Weimiaofracture belt than that on the south side and near *** thesis discussed the gas occurrenceregularity based on the geometric characteristics of the geological structure andits regional tectonic *** study can provide a foundation for coalfield exploitationand deal with coal and gas outburst.

关键词： geological structure evolutional regularity gas occurrence Qidong coalmine

Density Functional Theory Study of Selectivity of Crown Ethers to Li^+ in Spent Lithium-Ion Batteries Leaching Solutions

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Chinese Journal of Chemical Physics 2019年第3期32卷 343-348,I0002页

作者： yong-lin yao Mei-ying Zhu Zhuo Zhao Wen-gang Liu Bi-hai Tong Ming-yang Li School of Metallurgical Engineering Anhui University of TechnologyMaanshan 243002China School of Resources and Civil Engineering Northeastern UniversityShenyang 110819China Key Laboratory of Metallurgical Emission Reduction & Resources Recycling Anhui University of TechnologyMaanshan 243002China

It is a challenge to recover lithium from the leaching solution of spent lithium-ion batteries,and crown ethers are potential extractants due to their selectivity to alkali metal *** theoretical calculations for the selectivity of crown ethers with different structures to Li ions in aqueous solutions were carried out based on the density functional *** calculated results of geometries,binding energies,and thermodynamic parameters show that 15C5 has the strongest selectivity to Li ions in the three crown ethers of 12C4,15C5,and 18C6.B15C5 has a smaller binding energy but more negative free energy than 15C5 when combined with Li^+,leading to that the lithium ions in aqueous solutions will combine with B15C5 rather than *** exchange reactions between B15C5 and hydrated Li^+,Co^2+,and Ni^2+were analyzed and the results show that B15C5 is more likely to capture Li^+from the hydrated ions in an aqueous solution containing Li^+,Co^2+,and Ni^2+.This study indicates that it is feasible to extract Li ions selectively using B15C5 as an extractant from the leaching solution of spent lithium-ion batteries.

关键词： Density functional theory Crown ether Geometry Binding energy Thermodynamic parameter

Thermodynamics analysis of Ni^(2+)-C_2H_8N_2- C_2O_4^(2-)-H_2O system and preparation of Ni microfiber

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Transactions of Nonferrous Metals Society of China 2013年第11期23卷 3456-3461页

作者：姚永林张传福湛菁丁风华邬建辉中南大学冶金与环境学院长沙410083

According to the principles of simultaneous equilibrium and mass equilibrium, the thermodynamics model of the precipitation-coordination equilibrium of Ni2＋-C2H8N2- 2-2 4C O -H2O system was established, and calculation for the relationships between concentration of each substance in solution and parameters was carried out, including pH value, concentrations of ethylenediamine and oxalate by MATLAB program. The results show that Ni exists as Ni2＋and [Ni（C2O4）n]2-2n mainly at pH〈1 and pH=1-6, respectively. When pH〉6, the complex between Ni2＋and ethylenediamine is predominant. The precursor of Ni microfiber was prepared by an oxalate precipitation process using ethylenediamine as a coordination agent, and the role of ethylenediamine in the growth of the precursor fiber was discussed. The Ni microfiber can be obtained by a thermal decomposition-reduction process of the precursor in N2 and H2 mixed atmosphere. The diameters and aspect ratios of the obtained Ni microfibers are 0.2-1 μm and 20-30, respectively.

关键词： thermodynamics analysis Ni microfiber precursor thermal decomposition reduction

Alterations of Microtubules and Microfilaments Were Induced by Toxin of Verticillium dahliae in Arabidopsis Suspension Cells

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Alterations of Microtubules and Microfilaments Were Induced ...

2005年全国植物逆境生理与分子生物学研讨会

作者： Hai- yong Yuan, lin-lin yao, Zhi-Qi Jia and Ying-Zhang Li (State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100094)

＜正＞In plant cells, the cytoskeletons play important roles in the responses to biotic and abiotic stresses. However, little is known about cytoskeletal dynamics following attack by nonphysical stress factors, such as elicitors and toxins. We report here that the Verticillium dahliae toxin （VD-toxin） induces changes in microfilaments （MFs） and microtubules （MTs） in Arabidopsis suspension-cultured cells. When the cells were treated with low concentration VD-toxin, MFs were disrupted and then recovered automatically, while the MTs persisted. The MFs in the

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药物代谢组学及其应用

中国临床药理学杂志 2014年第4期30卷 374-376页

作者：白楠林永耀王睿唐铭婧王瑾解放军总医院药物临床研究中心北京100853

药物代谢组学是通过用药前代谢产物的特点来预测对个人进行药物或外来物干预的结果,主要目标是寻找出与疾病相关的、具有个体差异、能代表个体代谢水平的生物标记物或生物标记组,对药物安全性评价及个体化治疗将起到重要作用。

关键词：药物代谢组学个体化治疗药物安全性评价

Posttraumatic stress symptoms among Chinese university students during the COVID-19 pandemic:Prevalence,correlates,and mental health help-seeking

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World Journal of Psychiatry 2025年第1期15卷 145-152页

作者： Rui-yao Wu lin-Feng Ge Bao-Liang Zhong Department of Psychiatry The Affiliated Wuhan Mental Health CenterTongji Medical College of Huazhong University of Science&TechnologyWuhan 430012Hubei ProvinceChina Department of Psychiatry Wuhan Mental Health CenterWuhan 430012Hubei ProvinceChina

BACKGROUND Revisiting the epidemiology of posttraumatic stress symptoms(PTSSs)among university students during the coronavirus disease 2019(COVID-19)pandemic as well as understanding the mental health help-seeking behavior of individuals with PTSSs has critical implications for public mental health strategies in future medical *** To investigate the prevalence and correlates of PTSSs among university students during the first wave of the COVID-19 pandemic in China and to examine mental health help-seeking behaviors among these *** A total of 2507 Chinese university students were recruited via snowball *** students completed the Seven-item Screening Scale for Post-traumatic Stress Disorder during the first wave of the COVID-19 pandemic in ***-graphic characteristics,pandemic-related characteristics,and mental health help-seeking behaviors of students with PTSSs were also *** The prevalence of PTSSs among the participants was 28.0%.Seven significant correlates of PTSSs were identified(odds ratio=1.23-3.65,P≤0.024):Female sex,being 19 years old or older,living with others or alone,a low level of family economic status,fair or poor interpersonal relationships,severe or very severe local pandemic,and having family members diagnosed with ***,only 3.28%of the students with PTSSs reported seeking help from mental health *** the 23 students who sought help from mental health specialists,13 opted for online or telephone-based psychological *** Our data suggest that there was a high risk of PTSSs among university students and a high level of unmet mental health needs during the COVID-19 *** delivery of mental health services online or via telephone is a promising approach to address these unmet needs.

关键词： Posttraumatic stress symptoms University students COVID-19 Mental health help-seeking China

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上宫金矿深部开拓系统方案优选

黄金 2017年第1期38卷 32-36页

作者：钟勇林尧王瑛毅紫金矿业集团股份有限公司洛阳坤宇矿业有限公司

矿山的开拓系统对基建投资、运营费用、基建周期及安全生产等起着较大作用。为了保证矿山后期正常生产运行,结合上宫金矿深部矿体赋存条件、资源现状,提出了3种技术上可行的开拓系统方案,并对各开拓系统方案进行了详细的对比分析。结果... 详细信息

矿山的开拓系统对基建投资、运营费用、基建周期及安全生产等起着较大作用。为了保证矿山后期正常生产运行,结合上宫金矿深部矿体赋存条件、资源现状,提出了3种技术上可行的开拓系统方案,并对各开拓系统方案进行了详细的对比分析。结果表明:新掘38勘探线盲竖井+延伸47勘探线明竖井的联合开拓方案充分考虑了上宫金矿的发展现状,不仅总投资费用最低、基建时间最短,而且能满足将产能由950 t/d提升至1 200 t/d的需求。因此,该开拓系统方案是上宫金矿深部开拓的最佳选择。

关键词：深部开拓开拓系统延伸竖井盲竖井运营费用