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Constructing graphene nanosheet-supported FeOOH nanodots for hydrogen storage of MgH2

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International Journal of Minerals,Metallurgy and Materials 2022年第7期29卷 1464-1473页

作者： mengchen Song Liuting zhang Jiaguang Zheng Zidong Yu Shengnan Wang School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China Institute of Chemical Materials China Academy of Engineering PhysicsMianyang 621999China

Novel graphene-supported FeOOH nanodots(FeOOH NDs@G)were successfully prepared by a facile hydrothermal method and doped into MgH_(2)through mechanical ***_(2)with 10wt%FeOOH NDs@G began to release hydrogen at 229.8℃,which is106.8℃ lower than that of pure MgH_(2).The MgH_(2)-10wt%FeOOH NDs@G composite could reversibly absorb 6.0wt%hydrogen at 200℃ under a 3.2 MPa hydrogen pressure within 60 *** the addition of FeOOH NDs@G,the dehydrogenation and hydrogenation activation energy of MgH_(2)was decreased to 125.03 and 58.20 kJ·mol^(-1)(156.05 and 82.80 kJ·mol^(-1)for pure MgH_(2)),***,the hydrogen capacity of the FeOOH NDs@G composite retained 98.5%of the initial capacity after 20 cycles,showing good cyclic *** catalytic action of FeOOH NDs@G towards MgH_(2)could be attributed to the synergistic effect between graphene nanosheets and in-situ formed Fe,which prevented the aggregation of Mg/MgH2 particles and accelerated the hydrogen diffusion during cycling,thus enabling the Mg H_(2)-10wt%FeOOH NDs@G composite to exhibit excellent hydrogen storage performance.

关键词： hydrogen storage MgH_(2) FeOOH NDs@G catalysis

Au^(δ-)-O_(v)-Ti^(3+):Active site of MO_(x)-Au/TiO_(2) catalysts for the aerobic oxidation of 5-hydroxymethylfurfural

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Green Energy & Environment 2023年第3期8卷 785-797页

作者： Weiyao Yang mengchen Fu Chenyu Yang Yiwen zhang Chun Shen Beijing Key Laboratory of Bioprocess College of Life Science and TechnologyBeijing University of Chemical TechnologyNo.15 of North Three-Ring East RoadChaoyang DistrictBeijing100029China The State Key Laboratory of Chemical Engineering Department of Chemical EngineeringTsinghua UniversityBeijing100084China

Despite wide applications of noble metal-based catalysts in 5-hydroxymethylfurfural(HMF)oxidation,promoting the catalytic performance at low loading amounts still remains a significant ***,a series of metal oxide modified MO_(x)-Au/TiO_(2)(M=Fe,Co,Ni)catalysts with low Au loading amount of 0.5 wt%were *** of transition metal oxides promotes electron transfer and generation of the Au^(δ-)-O_(v)-Ti^(3+)interface.A combination study reveals that the dual-active site(Au^(δ-)-O_(v)-Ti^(3+))governs the catalytic performance of the ratedetermining step,namely hydroxyl group ***^(δ-) site facilitates chemisorption and activation of O_(2) *** the same time,O_(v)-Ti^(3+) site acts as the role of“killing two birds with one stone”:enhancing adsorption of both reactants,accelerating the activation and dissociation of H_(2)O,and facilitating activation of the adsorbed O_(2).Besides,superoxide radicals instead of base is the active oxygen species during the rate-determining *** this basis,a FDCA yield of 71.2% was achieved under base-free conditions,complying with the“green chemistry”*** work provides a new strategy for the transition metal oxides modification of Au-based catalysts,which would be constructive for the rational design of other heterogeneous catalysts.

关键词： 5-Hydroxymethylfurfural Base-free oxidation Interfacial catalysis Active oxygen species

红细胞分布宽度在慢加急性肝衰竭患者预后预测中的应用

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临床荟萃 2018年第7期33卷 591-594页

作者：张梦晨蔡均均谢肖立姜慧卿河北医科大学第二医院消化内科河北省消化病实验室河北省消化病研究所河北石家庄050000

目的旨在探讨红细胞分布宽度(RDW)在慢加急性肝衰竭(ACLF)患者预测预后中的应用。方法选取乙型肝炎病毒(HBV)相关性ACLF患者78例,根据预后分为生存及死亡组,检测患者外周血RDW水平及其他相关临床指标。结果 ACLF死亡患者外周血RDW水平... 详细信息

目的旨在探讨红细胞分布宽度(RDW)在慢加急性肝衰竭(ACLF)患者预测预后中的应用。方法选取乙型肝炎病毒(HBV)相关性ACLF患者78例,根据预后分为生存及死亡组,检测患者外周血RDW水平及其他相关临床指标。结果 ACLF死亡患者外周血RDW水平高于生存患者(t=-3.568,P=0.004)。RDW与白细胞计数(WBC)、中性粒细胞绝对值/淋巴细胞绝对值(NLR)、总胆红素(TBIL)、终末期肝脏病评分(MELD)存在相关性(P值均<0.05)。受试者工作特征曲线(ROC)分析显示:RDW预测ACLF死亡率的ROC曲线下面积(AUC)为0.64,Cut-off值为17.15%,灵敏度和特异度分别为54.2%和67.9%。多因素回归分析显示:RDW、NLR、国际标准化比值(INR)是ACLF患者短期死亡率的独立危险因素(OR值=1.444、1.305、1.891,P值均<0.05),生存分析显示:RDW≥17.15%患者生存率低于RDW<17.15%患者(P<0.05)。结论外周血RDW是临床预测ACLF患者短期预后的简单、有效的指标。

关键词：肝功能衰竭红细胞分布宽度预后

Experimental results for the vapor-liquid equilibria of 0(formaldehyde+1,3,5-trioxane+methanol+salt+water)systems and comparison with predictions

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Chinese Journal of Chemical Engineering 2021年第4期34卷 291-300页

作者： Xianming zhang mengchen Li Yufeng Hu Zhichang Liu Shuqin Mo State Key Laboratory of Heavy Oil Processing and High Pressure Fluid Phase Behavior&Property Research Laboratory China University of PetroleumBeijing 102249China School of Chemical Engineering Ordos Institute of TechnologyOrdos 017000China PetroChina Petrochemical Research Institute Science Base PetroChina Beijing 102206China

The salt effect on the vaporliquid phase equilibrium(VLE)of solvent mixtures is of significant interest in the industrial production of 1,3,*** data for the VLE of quinary systems(formaldehyde+1,3,5trioxane+methanol+salt+water)and their ternary subsystems(formaldehyde+salt+water),(1,3,5trioxane+salt+water),and(methanol+salt+water)were systematic measured under atmospheric *** salts considered included KBr,NaNO_(3),and CaCl_(2).The extended UNIFAC model was used to describe the VLE of the saltcontaining reactive *** model parameters were determined from the experimental VLE data of ternary systems or obtained from the literature,and then were used to predict the VLE of systems(1,3,5trioxane+KBr+water),(methanol+KBr+water),(formaldehyde+KBr+water),and(formaldehyde+1,3,5trioxane+methanol+salt+water)with salt=KBr,NaNO_(3),and CaCl_(2).The predicted results showed good agreements with the measured ***,the model was used to uncover the salt effect on the VLE of these multisolvent reactive systems.

关键词： Vapor liquid equilibria Reactive distillation Activity coefficient 1,3,5-Trioxane production UNIFAC Salt effect

Three-phase interface induced charge modulation on MoO_(2)/Mo_(2)Ccarbon tube for enhanced hydrogen evolution

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Nano Research 2023年第4期16卷 4706-4714页

作者： Zhijie zhang Jing Zhao mengchen Wu Qinghua Lu Rui Liu Shanghai Key Laboratory of Development and Application for Metal-Functional Materials School of Materials Science and EngineeringTongji UniversityShanghai 201804China School of Chemical Science and Engineering Tongji UniversityShanghai 200092China

Exploring superior electrocatalyst for hydrogen evolution reaction(HER)is an urgent need for hydrogen production based on water *** redistribution of electrons and the increase of active sites through multi-interface designing of electrocatalyst are powerful strategies to improve the catalytic ***,a three-phase interface structure of N,P co-doped carbon tube embedded with MoO_(2)/Mo_(2)C(MoO_(2)/Mo_(2)C-CT)was fabricated via a cooperative polymerizing-embedding and pyrolysis *** function and X-ray photoelectron spectroscopy(XPS)verified that the interfacial charge was quantificationally modulated,achieving an intrinsically enhanced charge transfer by an induced built-in electric *** study of density functional theory(DFT)illustrated that triple-interface structure showed a lower energy for H*+H2O*than that of single-interface *** triple-interface MoO_(2)/Mo_(2)C-CT delivered a lower overpotential of 129 mV at 10 mA·cm^(−2)than that of either single-interface MoO_(2)-CT or Mo_(2)C-CT *** work may put forward an attractive approach for modulating electronic structure and provide insights into the understanding of triple-interface structure towards HER.

关键词： triple-interface Mo carbon tube hydrogen evolution reaction density functional theory

非洲栽培稻基因渗入系粒形和剑叶形态性状的QTL定位

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核农学报 2022年第3期36卷 509-516页

作者：杨莹莹李若思王一平袁筱萍章孟臣杨窑龙魏兴华冯跃中国水稻研究所国家水稻改良中心/水稻生物学国家重点实验室浙江杭州310006

非洲栽培稻作为重要的水稻种质资源,其基因渗入系可以为普通栽培稻的遗传背景提供新的有利基因,如果能将这些优良基因引入普通栽培稻中,可为水稻分子设计育种提供新的基因资源。本研究以非洲栽培稻基因渗入系YIL60与轮回亲本中9B(Z9B)... 详细信息

非洲栽培稻作为重要的水稻种质资源,其基因渗入系可以为普通栽培稻的遗传背景提供新的有利基因,如果能将这些优良基因引入普通栽培稻中,可为水稻分子设计育种提供新的基因资源。本研究以非洲栽培稻基因渗入系YIL60与轮回亲本中9B(Z9B)杂交衍生的包含188个株系的F_(2)和F_(2:3)群体为材料,对粒形性状包括粒长、粒宽、籽粒长宽比、千粒重,剑叶形态性状包括剑叶长、剑叶宽进行数量性状点位(QTL)检测。结果共检测到16个QTL,包括2个粒长QTL、3个粒宽QTL、2个籽粒长宽比QTL、2个千粒重QTL、1个剑叶长QTL、6个剑叶宽QTL,分布于第1、第6、第7、第10和第11号染色体上,贡献率为2.25%~25.64%;有4个多效性QTL区间,有4个QTL qGW7-1、qFLL10、qFLW10、qTGW7在F;和F;群体中被重复检测到,其中在第7号染色体RM3859-RM3394区间检测到同时控制粒长、粒宽、籽粒长宽比和千粒重的QTL,贡献率最高达17.10%,是一个来源于非洲栽培稻的新粒形QTL。本研究为进一步开展粒形、剑叶形态性状基因的精细定位、克隆和分子标记辅助育种工作奠定了一定的理论基础。

关键词：非洲栽培稻基因渗入系粒形剑叶 QTL定位

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大豆长片段插入/缺失标记的开发与应用

华北农学报 2022年第1期37卷 18-26页

作者：李曼史晓蕾邸锐刘志芳孟庆民付才杨春燕王冬梅张孟臣张洁闫龙华北作物改良与调控国家重点实验室河北省植物生理与分子病理学重点实验室河北农业大学生命科学学院河北保定071001 河北省农林科学院粮油作物研究所国家大豆改良中心石家庄分中心农业农村部黄淮海大豆生物学与遗传育种重点实验室河北省作物遗传育种实验室河北石家庄050035 河北省种子总站河北石家庄050031 河北省农林科学院遗传生理研究所河北石家庄050051

为了开发稳定可靠、操作简便的大豆分子标记,以12份地理来源不同的大豆种质资源为材料,通过基因组10倍深度重测序开发长片段插入/缺失(InDel)标记,并应用2018年黄淮海大豆多点鉴定96份参试品系DNA指纹图谱构建。结果表明,在参试材料中,... 详细信息

为了开发稳定可靠、操作简便的大豆分子标记,以12份地理来源不同的大豆种质资源为材料,通过基因组10倍深度重测序开发长片段插入/缺失(InDel)标记,并应用2018年黄淮海大豆多点鉴定96份参试品系DNA指纹图谱构建。结果表明,在参试材料中,共检测到插入/缺失片段长度大于20 bp的InDel标记66561个,平均每条染色体InDel标记的数量为3262个;位于内含子的InDel占比12.35%,位于基因上游序列和下游序列的InDel占比分别为25.83%,20.44%,位于基因间隔区的InDel占比34.39%,位于外显子的InDel占比0.19%,位于5′-UTR和3′-UTR的InDel占比分别为0.93%和1.51%;片段长度介于20~40 bp的InDel数量为42453个,41~60 bp为13044个,61~80 bp为5034个,81~100 bp为2285个,大于100 bp为2413个;从检测到的66561个InDel位点中,根据插入/缺失片段长度,在基因组中随机选区160个InDel位点,利用引物设计、PCR和琼脂糖凝胶电泳等技术,在55℃的退火温度条件下,开发出32个有且仅有2个等位变异、基于1%琼脂糖凝胶电泳技术易于分辨的长片段插入/缺失标记。应用新开发的32个标记,构建了2018年黄淮海大豆多点鉴定96个参试品系DNA指纹图谱,参试的大豆材料纯度为96.84%,没有同物异名现象发生。研究开发的InDel标记稳定可靠、操作简便,可应用于大豆DNA指纹图谱构建、种子纯度检测等工作。

关键词：大豆分子标记长片段插入/缺失标记遗传多样性分析

Recent advances of magnesium hydride as an energy storage material

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Journal of Materials Science & Technology 2023年第18期149卷 99-111页

作者： mengchen Song Liuting zhang Fuying Wu Haoyu zhang Hu Zhao Lixin Chen Hong Li School of Energy and Power Instrumental Analysis CenterJiangsu University of Science and TechnologyZhenjiang 212003China School of Mechanical and Aerospace Engineering Nanyang Technological University639798Singapore State Key Laboratory of Silicon Materials Department of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China

Energy storage is the key for large-scale application of renewable energy,however,massive efficient en-ergy storage is very *** hydride(MgH_(2))offers a wide range of potential applications as an energy carrier due to its advantages of low cost,abundant supplies,and high energy storage ***,the practical application of MgH_(2) for energy storage is still impeded by its sluggish kinetics,poor cycling stability,***,we provide an overview of recent advances of MgH_(2) for enhancing the hydrogen storage,lithium-ion storage,and heat storage *** hydrogen storage,a particular emphasis was put on altering the kinetics and thermodynamics of MgH_(2) via catalyzing,alloying,nano-sizing,and *** to MgH_(2) as a battery anode material mainly focus on the effect of additives,electrolytes,and structure *** heat storage apparatus was proposed based on MgH_(2) and coupled with other materials or systems to improve the heat storage and economic ***,prospects of MgH_(2) in these fields are *** review would stimulate more insightful and pioneering research for the design and preparation of MgH_(2) with excellent energy storage performances.

关键词： Magnesium hydride Energy storage Hydrogen storage Li-ion battery Heat storage

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耕层残膜回收机研究现状及发展趋势

中国农机化学报 2024年第8期45卷 290-295页

作者：姚洁婷张学军史增录刘小鹏康梦晨郭磊新疆农业大学机电工程学院乌鲁木齐市830052 新疆智能农业装备重点实验室乌鲁木齐市830052

随着地膜在农业生产中的广泛应用,带来经济收益的同时也带来农田残膜污染。机械化回收是治理残膜污染的重要环节,其中耕层残膜的机械化回收是重难点,而高效稳定的耕层残膜回收机缺乏,不仅阻碍残膜污染治理的进程,一定程度上更制约农业... 详细信息

随着地膜在农业生产中的广泛应用,带来经济收益的同时也带来农田残膜污染。机械化回收是治理残膜污染的重要环节,其中耕层残膜的机械化回收是重难点,而高效稳定的耕层残膜回收机缺乏,不仅阻碍残膜污染治理的进程,一定程度上更制约农业的绿色可持续发展。为此,综述分析地膜残留的危害及耕层残膜污染的现状,对目前国内的耕层残膜回收机进行对比分析,重点列举我国耕层残膜回收机的结构原理及特点,指出目前我国膜土分离机理研究缺乏;回收机具的工作深度不够,需耕翻后来年再回收;自动化智能化程度低;复业式耕层残膜回收机少等问题。并结合我国国情提出研发主动捡膜机构,提高捡膜部件的智能化和精准度;配合污染监测装置,研究农田残膜污染的等级划分;研发耕层残膜回收及耕整地联合作业机,降低治理成本等建议,为治理农田残膜污染及耕层残膜回收机的发展提供参考。

关键词：耕层残膜污染机械化回收污染监测

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