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Multifunctional AlPO_(4)reconstructed LiMn_(2)O_(4)surface for electrochemical lithium extraction from brine

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Journal of Energy Chemistry 2024年第2期89卷 410-421,I0010页

作者： Jun Gu Linlin Chen Xiaowei Li Guiling Luo Linjing fan Yanhong Chao haiyan Ji Wenshuai Zhu School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina School of Chemistry and Chemical Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina College of Science State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum-BeijingBeijing 102249China School of the Environment and Safety Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina

LiMn_(2)O_(4)(LMO)electrochemical lithium-ion pump has gained widespread attention due to its green,high efficiency,and low energy consumption in selectively extracting lithium from ***,collapse of crystal structure and loss of lithium extraction capacity caused by Mn dissolution loss limits its industrialized ***,a multifunctional coating was developed by depositing amorphous AlPO_(4)on the surface of LMO using sol-gel *** characterization and electrochemical performance test provided insights into the mechanism of Li^(+)embedment and de-embedment and revealed that multifunctional AlPO_(4)can reconstruct the physical and chemical state of LMO surface to improve the interface hydrophilicity,promote the transport of Li^(+),strengthen cycle ***,after 20 cycles,the capacity retention rate of 0.5AP-LMO reached 93.6%with only 0.147%Mn dissolution *** average Li^(+)release capacity of 0.5AP-LMO//Ag system in simulated brine is 28.77 mg/(g h),which is 90.4%higher than ***,even in the more complex Zabuye real brine,0.5AP-LMO//Ag can still maintain excellent lithium extraction *** results indicate that the 0.5AP-LMO//Ag lithium-ion pump shows promising potential as a Li^(+)selective extraction system.

关键词： LiMn_(2)O_(4) Multifunctional AlPO_(4)coating Li^(+)embedment and de-embedment mechanism Stability Hydrophilicity Various solution

Tailoring Mg^(2+)Solvation Structure in a Facile All-Inorganic[Mg_(x)Li_(y)Cl2_(x+y)·nTHF]Complex Electrolyte for High Rate and Long Cycle-Life Mg Battery

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Energy & Environmental Materials 2023年第2期6卷 152-158页

作者： haiyan fan Xinxin Zhang Yuxing Zhao Jianhua Xiao Hua Yuan Guang Wang Yitao Lin Jifang Zhang Ludi Pan Ting Pan Yang Liu Yuegang Zhang State Key Laboratory of Low-Dimensional Quantum Physics Department of PhysicsTsinghua UniversityBeijing 100084China

A high-performance all-inorganic magnesium-lithium chloride complex(MLCC)electrolyte is synthesized by a simple room-temperature reaction of LiCl with MgCl_(2) in tetrahydrofuran(THF)*** dynamics simulation,density functional theory calculation,Raman spectroscopy,and nuclear magnetic resonance spectroscopy reveal that the formation of[Mg_(x)Li_(y)Cl_(2x+y)·nTHF]complex solvation structure significantly lowers the coordination number of THF in the first solvation sheath of Mg^(2+),which significantly enhances its de-solvation *** MLCC electrolyte presents a stable electrochemical window up to 3.1 V(vs Mg/Mg^(2+))and enables reversible cycling of Mg metal deposition/stripping with an outstanding Coulombic efficiency up to 99%at current densities as high as 10 mA cm^(-2).Utilizing the MLCC electrolyte,a Mg/Mo_(6)S_(8) full cell can be cycled for over 10000 cycles with a superior capacity retention of 85 mA h g^(-1) under an ultrahigh rate of 50 C(1 C=128.8 mA g^(-1)).The facile synthesis of highperformance MLCC electrolyte provides a promising solution for future practical magnesium batteries.

关键词： cycle life electrolyte Mg battery solvation structure

Fast Tensor Principal Component Analysis via Proximal Alternating Direction Method with Vectorized Technique

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Applied Mathematics 2017年第1期8卷 77-86页

作者： haiyan fan Gangyao Kuang Linbo Qiao Department of Electronic Science and Engineering National University of Defense Technology Changsha China Department of Computer National University of Defense Technology Changsha China

This paper studies the problem of tensor principal component analysis (PCA). Usually the tensor PCA is viewed as a low-rank matrix completion problem via matrix factorization technique, and nuclear norm is used as a convex approximation of the rank operator under mild condition. However, most nuclear norm minimization approaches are based on SVD operations. Given a matrix , the time complexity of SVD operation is O(mn2), which brings prohibitive computational complexity in large-scale problems. In this paper, an efficient and scalable algorithm for tensor principal component analysis is proposed which is called Linearized Alternating Direction Method with Vectorized technique for Tensor Principal Component Analysis (LADMVTPCA). Different from traditional matrix factorization methods, LADMVTPCA utilizes the vectorized technique to formulate the tensor as an outer product of vectors, which greatly improves the computational efficacy compared to matrix factorization method. In the experiment part, synthetic tensor data with different orders are used to empirically evaluate the proposed algorithm LADMVTPCA. Results have shown that LADMVTPCA outperforms matrix factorization based method.

关键词： Tensor Principal Component Analysis Proximal Alternating Direction Method Vectorized Technique

Solid-liquid Extraction Spectrophotometric Determination of Copper with 2,9-dimethyl-1,10-phenanthroline

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Rare Metals 2001年第4期20卷 213-216页

作者： Peng, B Gao, JZ Hu, GL fan, HY Kang, JW Deng, HL NW Normal Univ Dept Chem Lanzhou 730070 Peoples R China

Solid liquid extraction of copper ion (I) with 2, 9-dimethyl-1, 10-phenanthroline (neo-cuproine, DMP) into molten naphthalene followed by chloroform spectrophotometric determination has been studied experimentally. The ternary complex Cu(I)-DMP-ClO4 was extracted quantitatively into molten naphthalene in the range of pH from 5 to 6 at 85 C-. Absorbance was spectrophotometrically determined at 459 nm against the reagent blank after the solid naphthalene layer was anhydrously dissolved in chloroform. Beer's law is obeyed over a concentration range of 0.5-70 mug/mL. The molar absorptivity and Sandell's sensitivity are 1.0x10(4) L/(mol(.)cm) and 0.0099 mug(.)cm(2) respectively. In addition, the various conditions on determination and the interference of coexisted ions were discussed, and the method was applied to the determination of copper ion both in tea samples and cadmium sulfate reagents. The results are in good agreement with those obtained by ICP AES method.

关键词： solid-liquid extraction spectrophotometric determination molten naphthalene copper DMP

OBE理念与翻转课堂融合的植物病理学课程教学改革与探索——以植物病害生物防治课程为例

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创新创业理论研究与实践 2024年第16期7卷 165-167页

作者：范海燕朱晓峰杨宁段玉玺夏子豪陈立杰沈阳农业大学植物保护学院

植物病害生物防治课程是植物保护专业重要的专业选修课之一，对新农科一流植物保护人才培养至关重要。课程组秉承OBE（成果导向教育）理念，融合翻转课堂，针对课程的教学现状，从教学内容的更新、思政元素资源库的构建、教学手段的改... 详细信息

植物病害生物防治课程是植物保护专业重要的专业选修课之一，对新农科一流植物保护人才培养至关重要。课程组秉承OBE（成果导向教育）理念，融合翻转课堂，针对课程的教学现状，从教学内容的更新、思政元素资源库的构建、教学手段的改进及多元化考核方式的改革等多个维度进行改革与探索，以期提高课程教学质量，进一步提升学生自主学习能力、专业实践能力和创新能力。

关键词： OBE 翻转课堂教学内容思政元素教学手段考核方式

Geochemical baseline determination and contamination of heavy metals in the urban topsoil of Fuxin City,China

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Journal of Arid Land 2020年第6期12卷 1001-1017页

作者： ZHANG Hua YU Miao XU Hongjia WEN Huan fan haiyan WANG Tianyi LIU Jiangang School of Geography Liaoning Normal UniversityDalian 116029China

Urban topsoil is the most frequent interface between human society and natural *** accumulation of heavy metals in the urban topsoil has a direct effect on residents'life and *** geochemical baseline of heavy metals is an objective description of the general level of heavy metals in the urban ***,the determination of geochemical baseline is necessary for regional environmental management,especially in coal cities prone to heavy metal *** metal pollution has become an environmental problem in Fuxin City,China for a long *** establish the geochemical baseline of heavy metals in the topsoil of Fuxin City and to evaluate the ecological risk of the topsoil,we collected 75 topsoil samples(0–20 cm)and analyzed the concentrations of Cu,Ni,Zn,Pb,Cr,Cd,Hg and As through X-ray fluorescence spectrometry,atomic absorption spectrometry and inductively coupled plasma optical emission *** determined the geochemical baseline of heavy metals in the topsoil of Fuxin City by using iteration removal,box-whisker plot,cumulative frequency curve and reference metal normalization;evaluated the contamination risk and ecological risk of the topsoil by using the baseline factor index,Nemerow index and Hakanson potential ecological risk index;and identified the source category of heavy metals in the topsoil by using a pedigree clustering *** showed that the geochemical baseline values were 42.86,89.34,92.23,60.55,145.21,0.09,0.08 and 4.17 mg/kg for Cu,Ni,Zn,Pb,Cr,Cd,Hg and As,*** results of Nemerow index and Hakanson potential ecological risk index indicated that the urban topsoil in the study area was slightly contaminated and suffering low potential ecological *** main contaminated areas dominated in the middle part and northeast part of the study area,especially in the western Haizhou Strip *** result of baseline factor index indicated that Hg and Cd were the major pollution *** a pedig

关键词： heavy metals urban topsoil geochemical baseline contamination index pedigree clustering heatmap

新生儿脐血浆多种细胞因子水平检测与早发型新生儿败血症的相关性研究

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现代检验医学杂志 2024年第4期39卷 150-154页

作者：常正江魏倩刘晓龙符兆英陈美霓何进伟樊海燕延安市人民医院检验科陕西延安716000 延安大学医学院陕西延安716000 榆林市第一医院检验科陕西榆林719000

目的分析新生儿脐带血血浆多种细胞因子表达水平与早发型新生儿败血症(early-onset neonatal sepsis,EONS)的相关性,旨在筛选出对新生儿早发型败血症有较大诊断价值的细胞因子。方法以2021年9月~2023年6月在延安市人民医院出生的足月新... 详细信息

目的分析新生儿脐带血血浆多种细胞因子表达水平与早发型新生儿败血症(early-onset neonatal sepsis,EONS)的相关性,旨在筛选出对新生儿早发型败血症有较大诊断价值的细胞因子。方法以2021年9月~2023年6月在延安市人民医院出生的足月新生儿和早产新生儿(胎龄均≥32周)310例作为受试对象,根据临床体征、实验室检查和血培养结果分为三组:无败血症基础对照组、新生儿早发型败血症血培养阳性组和新生儿早发型败血症血培养阴性组;在受试对象出生后立即采集脐带血,测定血浆细胞因子IL-2,IL-4,IL-6,IL-9,IL-10,IL-21,IFN-γ和TNF-α的表达水平,筛选出表达水平较高(关联性较高)的细胞因子,用受试者工作特征(receiver operating characteristic,ROC)曲线分析其单独检测和联合检测对新生儿早发型败血症诊断的特异度和敏感度。结果患儿脐血浆上述8种细胞因子中,IL-6,IL-9和IL-21浓度在新生儿早发型败血症血培养阳性组(392.6±258.7 pg/ml,11.9±7.5 pg/ml,29.1±16.8 pg/ml)和新生儿早发型败血症血培养阴性组(353.8±244.5 pg/ml,10.4±6.3 pg/ml,27.7±19.2 pg/ml)显著高于无败血症基础对照组(34.9±25.1 pg/ml,5.9±4.5 pg/ml,10.8±10.1 pg/ml),差异具有统计学意义(t=23.961,20.732;15.174,17.824;22.466,21.193,均P0.05)。ROC曲线分析,IL-6,IL-9,IL-21截断值分别为123.0 pg/ml,3.60 pg/ml和6.00 pg/ml,IL-6,IL-9和IL-21单独检测ROC曲线下面积分别为0.876(95%CI:0.786~0.955),0.782(95%CI:0.667~0.875)和0.825(95%CI:0.737~0.913),三种细胞因子联合检测,ROC曲线下面积为0.930(95%CI:0.875~0.997),IL-6,IL-9和IL-21联合检测能显著地提高检测的特异度和敏感度,差异具有统计学意义(Z=2.137,2.391,2.257,均P0.05)。结论新生儿早发型败血症患儿脐血浆细胞因子IL-6,IL-9和IL-21显著升高,联合检测IL-6,IL-9和IL-21对新生儿早发型败血症有较好的诊断价值。

关键词：早发型新生儿败血症细胞因子脐带血

Solvent Extraction of Some Lanthanides with Trioctylphosphine Oxide in Molten Paraffin Wax

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Rare Metals 2001年第1期20卷 18-23页

作者： Bi Wang, Xiaojun Guo, haiyan fan, Bo Peng, Jinzhang Gao (Department of Chemistry, Northwest Normal University, Lanzhou 730070, China Dept. of Leather Engineering, Sichuan University, Chendu 610065, China.) 四川大学四川成都 610065 西北师范大学甘肃兰州 730070

The extraction behavior of Ln(III) (Ln=Nd, Sm, Tb and Yb) with trioctylphosphine oxide (TOPO) in molten paraffin wax has been studied. The effect of pH, TOPO concentration, medium, stirring time and the amount of sails added on the distribution of lanthanides between two phases were investigated. Two different compositions Ln(H2O)(t-2) (TOPO)(2)(OH)(2)NO3 (Ln=Nd and Sm) and Ln(H2O)(s-1) (TOPO)(2)(OH)(NO3)(2) (Ln=Tb and Yb) were determined by slope analysis method. The equilibrium extraction constant K-ex and pH(1/2) value were calculated and the thermodynamic parameters were obtained from the dependence of K-ex on the temperature.

关键词： lanthanides trioctylphosphine oxide extraction molten paraffin

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地方高校财政性教育投资不均衡性研究

教育与经济 2011年第3期27卷 31-36页

作者：范海燕哈尔滨师范大学教育科学学院黑龙江哈尔滨150025

当前,地方高校是我国高等教育的主体,但地方高校财政性投资差异明显。本文用生均预算内经费指标衡量了我国30个省(市)地方高等教育财政的不均衡性,并经过分析地方政府举办高等教育努力程度、地方经济发展水平、地方高等教育发展规模、... 详细信息

当前,地方高校是我国高等教育的主体,但地方高校财政性投资差异明显。本文用生均预算内经费指标衡量了我国30个省(市)地方高等教育财政的不均衡性,并经过分析地方政府举办高等教育努力程度、地方经济发展水平、地方高等教育发展规模、中央政府对地方高等教育的支持程度对地方高校财政不均衡有较大影响,提出了促进地方高等教育的和谐、健康发展的对策建议。

关键词：地方高校省级政府财政性教育投资区域差异