卓越化工工程师人才培养研究探讨
作者:
刘慧君;王延飞;王宏青;刘泽华
期刊:
中国电力教育 ,2013年(28):42-43 ISSN:1007-0079
作者机构:
南华大学化学化工学院 湖南 衡阳 421001
关键词:
卓越化工工程师;双师型教师;课程体系
摘要:
针对目前大学工程教育现状和"卓越工程师"人才培养的具体要求,以化工专业为例提出了建设"双师型结构"教学团队、改革人才培养方案、构建科学课程体系及强化教学管理等实施方略。
语种:
中文
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Ligand-tuned metal coordination polymers constructed by the linear Cd3(COO)6/8 clusters: Preparations, structures, topologies and gas adsorptive properties
作者:
Wang, Xiao-Feng* ;Sun, Yun-Kai;Wang, Shu-Hong
期刊:
Microporous and Mesoporous Materials ,2013年181:262-269 ISSN:1387-1811
通讯作者:
Wang, Xiao-Feng
作者机构:
[Sun, Yun-Kai; Wang, Xiao-Feng] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Wang, Shu-Hong] Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China.
通讯机构:
[Wang, Xiao-Feng] U;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
关键词:
Metal coordination polymer;Aromatic dicarboxylate;Topology;Microporosity;Gas adsorption
摘要:
Reactions of Cd(NO<inf>3</inf>)<inf>2</inf> and the different aromatic ditopic acids, five metal coordination polymers (MCPs) have been synthesized and characterized. The structural studies show the MCPs constructed from the linear trinuclear Cd<inf>3</inf>(COO)<inf>6/8</inf> secondary building units (SBUs). Owing to the different connect fashions of the SBUs, five MCPs feature non-porous or microporous framework, as well as three different type topologies respectively: 4 ×4 sheet, bcg or bcu net. ©2013 Elsevier Inc. All rights reserved.
语种:
英文
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热塑性聚氨酯/凹凸棒土纳米复合材料力学行为研究
作者:
廖云;邓昌爱;谭倪;杜可杰
期刊:
南华大学学报(自然科学版) ,2013年(3):82-85 ISSN:1673-0062
作者机构:
南华大学 化学化工学院,湖南 衡阳,421001;[谭倪; 廖云; 杜可杰; 邓昌爱] 南华大学
关键词:
热塑性聚氨酯;凹凸棒土;力学行为
摘要:
通过溶液共混法制备了热塑性聚氨酯( TPU )/凹凸棒土( AT )纳米复合材料,研究AT的加入对TPU基体滞后、拉伸应力软化行为和松弛效应的影响。研究结果显示:随着AT的加入,纳米复合材料的滞后圈增大,拉伸应力软化效应增强,应力松弛速率和程度降低。 TPU/AT体系分子链运动模型表明纳米复合材料力学行为的改变,可能是因为AT和TPU基体间形成了氢键,阻碍了分子链的运动。
语种:
中文
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Detection of uranium with a wireless sensing method by using salophen as receptor and magnetic nanoparticles as signal-amplifying tags
作者:
Yang, Miao;Liao, Lifu* ;Zhang, Guangliang;He, Bo;Xiao, Xilin;...
期刊:
Journal of Radioanalytical and Nuclear Chemistry ,2013年298(2):1393-1399 ISSN:0236-5731
通讯作者:
Liao, Lifu
作者机构:
[Yang, Miao; Xiao, Xilin; Liao, Lifu; Zhang, Guangliang; Nie, Changming; Lin, Yingwu; He, Bo] Univ South China, Coll Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.
通讯机构:
[Liao, Lifu] U;Univ South China, Coll Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.
关键词:
Uranium;Wireless sensing;Salophen;Magnetic nanoparticle;Magnetoelastic
摘要:
A new wireless sensing method for the detection of uranium in water samples has been reported in this paper. The method is based on a sandwich-type detection strategy. Salophen, a tetradentate ligand of uranyl ion, was immobilized on the surface of the polyurethane-protected magnetoelastic sensor as receptor for the capture of uranyl ion. The phosphorylated polyvinyl alcohol coated magnetic Fe3O4 nanoparticles were used as signal-amplifying tags of uranyl ion. In a procedure of determining uranium, firstly uranyl ion in sample solution was captured on the sensor surface. Then the captured uranyl bound the nanoparticle through its coordination with the phosphate group. The amount of uranium was detected through the measure of the resonance frequency shift caused by the enhanced mass loading on the sensor surface. A linear range was found to be 0.2-20.0 μg/L under optimal conditions with a detection limit of 0.11 μg/L. The method has been applied to determine uranium in environmental water samples with the relative standard deviations of 2.1-3.6 % and the recoveries of 98.0-101.5 %. The present technique is one of the most suitable techniques for assay of uranium at trace level in environmental water samples collected from different sources. © 2013 Akadémiai Kiadó, Budapest, Hungary.
语种:
英文
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镍基催化上甲烷部分氧化反应机理的量化计算
作者:
龙威;周昕;罗虹;邓昌爱
期刊:
南华大学学报(自然科学版) ,2013年27(1):78-82 ISSN:1673-0062
作者机构:
南华大学化学化工学院,湖南衡阳,421001;[龙威; 邓昌爱; 罗虹; 周昕] 南华大学
关键词:
甲烷部分氧化;反应机理;量子化学;密度泛函
摘要:
采用密度泛函(DFT)及二级微扰(MP2)方法,结合混合基组对镍基催化上甲烷部分氧化反应机理进行了研究.计算结果表明,甲烷部分氧化的反应包含六步,其中有两步是副反应,各步的热焓分别为:212.46、-413.46、-69.65、135.28、-94.69、-42.25 kJ/mol.第一步甲烷的逐步脱氢是强吸热的,第五步为生成CO的关键反应且较容易发生,其活化能仅为44.59 kJ/mol.
语种:
中文
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Rational heme protein design: All roads lead to Rome
作者:
Lin, Ying-Wu;Sawyer, Elizabeth B.* ;Wang, Jiangyun
期刊:
CHEMISTRY-AN ASIAN JOURNAL ,2013年8(11):2534-2544 ISSN:1861-4728
通讯作者:
Sawyer, Elizabeth B.
作者机构:
[Lin, Ying-Wu] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Wang, Jiangyun] Chinese Acad Sci, Lab Noncoding RNA, Inst Biophys, Beijing 100101, Peoples R China.;[Sawyer, Elizabeth B.] Chinese Acad Sci, Natl Lab Biomacromol, Inst Biophys, Beijing 100101, Peoples R China.;[Sawyer, Elizabeth B.] Chinese Acad Sci, Natl Lab Biomacromol, Inst Biophys, 15 Datun Rd, Beijing 100101, Peoples R China.
通讯机构:
[Sawyer, Elizabeth B.] C;Chinese Acad Sci, Natl Lab Biomacromol, Inst Biophys, 15 Datun Rd, Beijing 100101, Peoples R China.
关键词:
heme proteins;metalloporphyrin;metalloproteins;protein design;unnatural amino acids
摘要:
Heme proteins are among the most abundant and important metalloproteins, exerting diverse biological functions including oxygen transport, small molecule sensing, selective C-H bond activation, nitrite reduction, and electron transfer. Rational heme protein designs focus on the modification of the heme-binding active site and the heme group, protein hybridization and domain swapping, and de novo design. These strategies not only provide us with unique advantages for illustrating the structure-property-reactivity-function (SPRF) relationship of heme proteins in nature but also endow us with the ability to create novel biocatalysts and biosensors. All roads lead to Rome: During the last few decades, various approaches for rational heme protein design have emerged. These techniques not only enhance our understanding of the structure and function of heme proteins in nature but also facilitate the creation of novel biocatalysts and biosensors beyond nature. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
语种:
英文
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3,5-二甲基-2-(3-氟苯基)-2-吗啉醇盐酸盐的不对称合成及晶体结构解析
作者:
李禄新;陈川;肖新荣;陶源;郑友霖;...
期刊:
南华大学学报(自然科学版) ,2013年27(2):67-71 ISSN:1673-0062
作者机构:
南华大学化学化工学院,湖南衡阳,421001;[徐秋燕; 郑友霖; 肖新荣; 陶源; 李禄新; 陈川] 南华大学
关键词:
吗啉醇;氨基丙醇;晶体结构
摘要:
以(S)-2-氨基丙醇和(R)-2-氨基丙醇为手性源与α-溴代间氟苯丙酮反应,分别合成手性纯化合物(2R,3R,5S)-3,5-二甲基-2-(3-氟苯基)-2-吗啉醇盐酸盐(4A),(2S,3S,5R)-3,5-二甲基-2-(3-氟苯基)-2-吗啉醇盐酸盐(4B).利用X射线单晶解析仪测晶体结构和空间结构.化合物4A晶体属正交体系,空间群为P21212,晶胞参数a=8.6886(11)nm,b=20.059(2)nm,c=7.6052(8)nm,Z=4,V=1.3255(3)nm3,Dc=1.311 g/cm3,F(000)=552,R1=0.0257,wR2=0.0650,S=1.021.化合物4B属于正交体系,空间群为P21212,晶胞参数a=8.6887(9)nm,b=20.064(2)nm,c=7.6135(7)nm,Z=4,V=1.3272(3)nm3,Dc=1.310 g/cm3,F(000)=552,R1=0.0356,wR2=0.0653,S=1.033
语种:
中文
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基于Schiff碱的Th4+荧光探针性能研究
作者:
李虹霖;王宏青;王榆元;汤金辉;江晓娇
期刊:
南华大学学报(自然科学版) ,2013年(4):86-89,95 ISSN:1673-0062
作者机构:
南华大学 化学化工学院,湖南 衡阳,421001;[李虹霖; 王宏青; 江晓娇; 汤金辉; 王榆元] 南华大学
关键词:
Schiff碱;荧光探针
摘要:
以N,N’-双-3-烯丙基水杨醛缩邻苯二胺( BASPDA) Schiff碱为荧光探针,研究了各种因素对BASPDA和Th( IV)配合物的荧光影响,建立了BASPDA荧光探针分析检测Th(IV)的方法,其线性范围为1.0×10-7 mol/L~2.9×10-5 mol/L,检出限为0.5×10-7 mol/L.
语种:
中文
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红外热成像技术研究聚酯纤维的冷拉现象
作者:
王孟;陈大俊
期刊:
高分子材料科学与工程 ,2013年29(6):121-123+128 ISSN:1000-7555
通讯作者:
Chen, D.(cdj@dhu.edu.cn)
作者机构:
[陈大俊; 王孟] College of Materials Science and Engineering, Donghua University, Shanghai 201620, China;[王孟] School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
通讯机构:
[Chen, D.] C;College of Materials Science and Engineering, Donghua University, China
关键词:
红外热成像技术;纤维;冷拉;结晶
摘要:
采用红外热成像技术研究了聚酯(PET)纤维的冷拉颈缩现象,选用一种特殊的18μm微焦镜头,形变过程中纤维的温度和直径变化能被同时检测到。红外热像图显示冷拉生热温度变化仅发生在纤维成颈区域,而且随着拉伸速率的提高,成颈区域温度升高可超过环境温度50℃~85 ℃。通过热力学的方法分析形变过程内能的变化,结果发现,内能随着拉伸不断减小,显示PET纤维在形变过程引发诱导结晶。
语种:
中文
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合成水杨酸甲酯的实验条件探究
作者:
竹李帅;熊双喜;龙威
期刊:
化学工程师 ,2013年27(6):12-14 ISSN:1002-1124
作者机构:
台州学院生命科学学院,浙江 台州,317000;台州学院医药化工学院,浙江 台州,317000;南华大学 化学化工学院,湖南 衡阳,421001;[龙威] 南华大学;[竹李帅; 熊双喜] 台州学院
关键词:
水杨酸甲酯;复合催化剂;药物化学合成
摘要:
甲醇和水杨酸合成水杨酸甲酯是药物化学合成的热点.在NaHHSO4·H2O作为主要催化剂的前提下,通过实验研究了催化剂、甲醇用量与反应时间的关系,着重分析了带水剂因素对合成水杨酸甲酯收率的影响.实验结果表明:甲醇∶水扬酸摩尔比为0.60∶0.10、NaHSO4·H2O质量为0.30g、H2SO4质量为0.80g、带水剂体积为4.00mL时,回流分水时间为3.0~3.5h为水杨酸酯甲酯的最佳实验条件,最高产率约为77.0%.
语种:
中文
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PDVT的电子结构、光谱及光学性质
作者:
龙威
期刊:
洛阳理工学院学报(自然科学版) ,2013年23(3):5-11 ISSN:1674-5043
作者机构:
南华大学化学化工学院,湖南衡阳,421001;[龙威] 南华大学
关键词:
量子化学;密度泛函;前线轨道
摘要:
有机共轭聚合物在电致发光材料上有较大的应用前景。采用密度泛函理论B 3LYP方法在6-311++G(d,p)水平上计算了PDVT的分子结构和电子结构,并对红外光谱、净电荷布局等详细分析,结合前线轨道理论探讨了分子的稳定性和活性强弱。计算结果表明P DVT分子的环状结构共轭效应良好,其中C(26)的反应活性最高,最容易接受亲电试剂的进攻。前线轨道分析表明P DVT分子的内部环状结构对H OMO轨道做主要贡献,S原子对L UMO轨道做主要贡献,计算所得△Eg=0.489 eV表明它更倾向于接受电子并具有适合的能带宽度。P DVT分子具有较小的空穴重组能,空穴载流子速率大,可作为良好的空穴传输材料。
语种:
中文
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Nickel, cobalt, and manganese oxide composite as an electrode material for electrochemical supercapacitors
作者:
Wang, Guoping* ;Liu, Lixia;Zhang, Lei;Zhang, Jiujun
期刊:
Ionics ,2013年19(4):689-695 ISSN:0947-7047
通讯作者:
Wang, Guoping
作者机构:
[Liu, Lixia; Wang, Guoping] Univ South China, Coll Chem Engn, Hengyang 421001, Peoples R China.;[Zhang, Jiujun; Zhang, Lei; Wang, Guoping] Natl Res Council Canada, Inst Fuel Cell Innovat, Vancouver, BC V6T 1W5, Canada.
通讯机构:
[Wang, Guoping] U;Univ South China, Coll Chem Engn, Hengyang 421001, Peoples R China.
关键词:
Electrochemical supercapacitor;Ni oxide;Co oxide;Mn oxide;Composite electrode material
摘要:
A composite material, Ni<inf>1/3</inf>Co<inf>1/3</inf>Mn<inf>1/3</inf>(OH)<inf>2</inf>, is synthesized by chemical precipitation method for supercapacitors' electrode material. Physical characterizations using x-ray diffraction, energy-dispersive x-ray, and scanning electron microscopy show that Ni<inf>1/3</inf>Co<inf>1/3</inf>Mn<inf>1/3</inf>(OH)<inf>2</inf> possesses an amorphous structure and higher specific surface area (268. 5 m<sup>2</sup> g<sup>-1</sup>), which lead to a high initial specific capacitance of 1,403 F g<sup>-1</sup> in the potential window of 0-1. 5 V. It may be a potential electrode material for future supercapacitor when its cycling stability and rate performance are addressed. ©2013 Springer-Verlag Berlin Heidelberg.
语种:
英文
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扑热息痛在Nafion-石墨烯-纳米金复合膜修饰电极上的电化学行为
作者:
匡云飞;邹建陵;李薇;周昕;许金生;...
期刊:
分析试验室 ,2013年32(4):30-35 ISSN:1000-0720
作者机构:
[匡云飞; 邹建陵; 李薇; 许金生; 杨颖群; 冯泳兰; 李玉明] 衡阳师范学院化学与材料科学系;[周昕] 南华大学化学化工学院
关键词:
石墨烯;纳米金;碳糊电极;微分脉冲溶出伏安法;扑热息痛
摘要:
利用Nafion,石墨烯(GS)和纳米金(AuNs)的N,N-二甲基甲酰胺(DMF)分散液制备了一种新型纳米复合膜修饰碳糊电极(CPE),建立了一种测定扑热息痛(PCT)的新方法。采用扫描电镜(SCE)对修饰电极进行了表征;利用循环伏安法(CV)研究了PCT在修饰电极上的电化学行为。利用微分脉冲溶出伏安法(DPSV)优化了测定PCT的试验条件。结果表明:PCT在Nafion/GS/AuNs修饰电极上于0.43V处出现了一灵敏的氧化峰(E_(pa)),其电极过程受扩散控制。同时利用氧化峰可以进行微量PCT的检测,其峰电流(i_p)与PCT浓度(c)在0.5~10 μmol/L和10~900 μmol/L范围内均呈良好的线性关系,相关系数分别为0.9968和0.9973,检出限(S/N=3)为0.1 μmol/L。复合膜修饰电极稳定性较好,可用于实际药品中扑热息痛的含量的快速检测。
语种:
中文
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高度支化聚醚多元醇树脂的合成及其在高固体分涂料中的应用
作者:
王延飞;王小峰;贺婷婷
期刊:
上海涂料 ,2012年50(11):16-20 ISSN:1009-1696
作者机构:
南华大学化学化工学院,湖南衡阳,421001;[王小峰; 王延飞; 贺婷婷] 南华大学
关键词:
聚醚多元醇树脂;醇酸树脂涂料;高固体分涂料
摘要:
以聚醚多元醇为核,二羟甲基丙酸为扩链剂,通过一步法合成了具有高度支化结构的聚醚多元醇树脂,并利用傅里叶变换红外光谱(FTIR)、凝胶渗透色谱(GPC)和差示扫描量热法(DSC)等对其结构和性能进行了分析。GPC结果表明:该支化树脂相对分子质量分布窄,多分散指数为1.12。同时将所制备的支化聚醚多元醇树脂用于醇酸涂料中,研究发现:在施工黏度允许的范围内,利用该树脂作为成膜树脂,所得涂料的施工固体分高达67.5%。说明所合成的高度支化聚醚多元醇树脂可作为高固体分涂料的成膜树脂。
语种:
中文
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磁性印迹材料的制备及其性能研究
作者:
何芳芳;王宏青;王榆元;张海生;李虹霖
期刊:
南华大学学报(自然科学版) ,2012年26(2):74-79 ISSN:1673-0062
作者机构:
南华大学化学化工学院,湖南衡阳,421001;[李虹霖; 王宏青; 何芳芳; 王榆元; 张海生] 南华大学
关键词:
钍(Ⅳ);磁性印迹材料;吸附
摘要:
本实验以salophen为功能单体,Th(Ⅳ)离子为模板离子,乙二醇二甲基丙烯酸酯(EGDMA)作交联剂,用偶氮二异丁腈(AIBN)作引发剂在烯基化的磁性Fe3O4粒子表面上热聚合制备磁性印迹材料.探讨此印迹材料对钍(Ⅳ)的最佳吸附条件.结果表明:此磁性印迹材料在pH为4.5,在70μg/mL钍(Ⅳ)中吸附30 min可以到达最大吸附容量42.54μg/mg.Th(Ⅳ)印迹材料相对U(Ⅵ),La(Ⅲ)和Ce(Ⅲ)的相对选择性系数分别是62.4,82.2和93.1,说明此材料可以在La(Ⅲ),Ce(Ⅲ)和U(Ⅳ)的存在下检测Th(Ⅳ).
语种:
中文
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GC-MS联用技术结合化学计量学方法分析厚朴叶挥发油成分
作者:
蒋军辉;徐小娜;杨慧仙;陈云生;谭琰
期刊:
分析测试学报 ,2012年31(5):523-529 ISSN:1004-4957
作者机构:
南华大学化学化工学院,湖南衡阳,421001;南华大学公共卫生学院,湖南衡阳,421001;[陈云生; 徐小娜; 杨慧仙; 谭琰; 蒋军辉] 南华大学
关键词:
厚朴叶;挥发油;直观推导式演进特征投影法;选择性离子法
摘要:
利用水蒸气蒸馏法提取湖南产厚朴叶的挥发油成分,采用GC-MS联用技术结合化学计量学方法(直观推导式演进特征投影法和选择性离子法)进行分析,同时结合程序升温保留指数辅助定性。结果共鉴定出54种化合物,占挥发油总量的84.95%。主要化学成分为α-、β-和γ-桉油醇,含量分别为13.10%、28.21%和14.67%。此外,含量较高的化合物还有α-蒎烯(2.96%)、芳樟醇(1.71%)、丹皮酚(1.88%)、石竹烯(2.04%)、佛术烯(3.60%)、α-瑟林烯(3.84%)和[1AR-(1Aα,4α,4Aβ,7Bα)]-1A,2,3,4,4A,5,6,7B-八氢化-1,1,4,7-四甲基-1H-环丙烯并[E]奥(1.34%)。研究表明,将化学计量学方法用于中药挥发油成分的分析可提高定性分析的准确性。所得结果可为厚朴药植物资源的开发利用提供依据。
语种:
中文
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The dual-purpose of solvent deasphalting integrated with FCC for production of qualified pavement asphalt and FCC feedstock to realize its maximum potential
作者:
Wang, Y.* ;Chen, Z.;Shen, B.
期刊:
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS ,2012年34(13):1187-1195 ISSN:1556-7036
通讯作者:
Wang, Y.
作者机构:
[Chen, Z.; Wang, Y.] Univ S China, Coll Chem & Chem Engn, Hengyan 421001, Hunan, Peoples R China.;[Shen, B.] E China Univ Sci & Technol, Shanghai 200237, Peoples R China.;[Wang, Y.] Univ S China, Coll Chem & Chem Engn, W Rd 28 Changsheng, Hengyan 421001, Hunan, Peoples R China.
通讯机构:
[Wang, Y.] U;Univ S China, Coll Chem & Chem Engn, W Rd 28 Changsheng, Hengyan 421001, Hunan, Peoples R China.
关键词:
fluid catalytic cracking slurry oil;solvent deasphalting;vacuum residuum
摘要:
Solvent deasphalting process is an important technology for upgrading heavy oil available in the petroleum processing industry today. The state-of-the-art deasphalting process extracts quality deasphalted oil and deoils asphalt from atmospheric or vacuum residuum and other heavy feedstock to offer qualified feedstock for downstream. To integrate the solvent deasphalting process with the fluid catalytic cracking process may bring solvent deasphalting into full play. This work presents deasphalting characteristics of modified vacuum residuum by fluid catalytic cracking slurry oil using propane as the solvent. One of the objectives is to improve the quality of deoiled asphalt by the use of polynuclear aromatics rich in fluid catalytic cracking slurry oil to avoid its pavement troubles; and the other objective is to provide experimental data for the solvent deasphalting process integrating with fluid catalytic cracking unit. Deasphalting experiments are carried out in a pilot scale unit and catalytic cracking experiment of deasphalted oil is completed in MRCS-8006 heavy oil micro-reaction equipment. The experimental results show that when vacuum residuum modified by fluid catalytic cracking slurry oil is used as the feedstock of solvent deasphalting, not only the deasphalted oil yield can be increased, but also the asphaltic by-product may be directly used as a suitable grade pavement pitch. © 2012 Taylor & Francis Group, LLC.
语种:
英文
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超微粉体技术对枳实药材中黄酮类成分溶出率的影响
作者:
徐小娜;蒋军辉;徐吉银;杨慧仙
期刊:
广州化工 ,2012年40(17):48-50 ISSN:1001-9677
作者机构:
南华大学公共卫生学院,湖南衡阳,421001;南华大学化学化工学院,湖南衡阳,421001;中智药业集团有限公司,广东中山,528415
关键词:
枳实;超微粉碎;橙皮苷;柚皮苷
摘要:
探讨了超微粉碎对枳实药材中有效成分溶出率的影响。以0.05%磷酸水-甲醇-乙腈为流动相,采用高效液相色谱法(high performance liquid chromatography,HPLC)测定枳实超微粉与药材60目细粉中橙皮苷、柚皮苷和芸香柚皮苷的溶出率。结果表明,枳实超微粉中的橙皮苷、柚皮苷和芸香柚皮苷的溶出率明显高于其60目细粉中三者的溶出率,超微粉碎可增强枳实药材有效成分的溶出。
语种:
中文
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Wet-chemical Synthesis of the Size-controlled BaTiO3 Nanoparticles for Embedded Capacitors
作者:
Zhang, Enhe* ;Luo, Suibin;Yang, Wenhu;Yu, Shuhui;Sun, Rong;...
作者机构:
[Zhang, Enhe; Zhao, Yubao] Univ South China, Sch Chem & Chem Engn, 1068 Xueyuan Ave, Hengyang 421000, Peoples R China.;[Yu, Shuhui; Sun, Rong; Zhang, Enhe; Yang, Wenhu; Luo, Suibin] Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen 518055, Peoples R China.
会议名称:
14th International Conference on Electronic Materials and Packaging (EMAP)
会议时间:
DEC 13-16, 2012
会议地点:
Hong Kong, PEOPLES R CHINA
会议主办单位:
[Zhang, Enhe;Zhao, Yubao] Univ South China, Sch Chem & Chem Engn, 1068 Xueyuan Ave, Hengyang 421000, Peoples R China.^[Zhang, Enhe;Luo, Suibin;Yang, Wenhu;Yu, Shuhui;Sun, Rong] Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen 518055, Peoples R China.
会议论文集名称:
International Conference on Electronic Materials and Packaging
摘要:
In this work, a simple two-step route has been developed to synthesize ultrafine barium titanate (BaTiO3) with size ranging from 30 nm to 100nm by reacting barium hydroxide with tetrabutyl titanate in mixing solvent. This method facilitates the process-control and the property tailoring of the particles. The effect of 1,4-butylene glycol on hydrolysis rate of tetrabutyl titanate, temperature, solvent ratio between isopropanol and water, the particle size, the crystalline phase have been investigated. The prepared BaTiO3 nanoparticles were characterized using X-ray diffraction and scanning electron microscopy (SEM). The results show that the particle size can be easily tuned by adjusting the ratio of 1, 4-butylene glycol, isopropanol and water in solution. The dielectric behavior of the BaTiO3 /PVDF at low frequency show that the interfacial polarization acts as an important role for the high dielectric constant (epsilon(r)).
语种:
英文
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KCl-assisted, chemically reduced graphene oxide for high-performance supercapacitor electrodes
作者:
Chen, Rixiong;Yu, Shuhui* ;Sun, Rong;Yang, Wenhu;Zhao, Yubao
期刊:
Journal of Solid State Electrochemistry ,2012年16(11):3635-3641 ISSN:1432-8488
通讯作者:
Yu, Shuhui
作者机构:
[Yu, Shuhui; Sun, Rong; Chen, Rixiong; Yang, Wenhu] Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen 518055, Peoples R China.;[Yu, Shuhui; Sun, Rong; Chen, Rixiong; Yang, Wenhu] Chinese Univ Hong Kong, Shenzhen 518055, Peoples R China.;[Chen, Rixiong; Zhao, Yubao] Univ S China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构:
[Yu, Shuhui] C;Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen 518055, Peoples R China.
关键词:
Graphene;KCl;Ionic strength;Agglomeration;Supercapacitor
摘要:
Graphene with highly flaky state has been successfully prepared through chemical reduction process with the assistance of potassium chloride (KCl) to enhance the ionic strength in the aqueous solution. The microstructure of graphene sheets (GS) prepared in different solutions was compared and the effect of the KCl on the dispersion of GS was investigated. The buoyancy and repulsive force from the ions in the solution were effective to prevent the graphene sheets from agglomerating with each other. SEM and TEM images showed that the graphene reduced in KCl solution has kept the highly flaky state whereas the graphene reduced in pure water has curled and re-stacked together. As for supercapacitor electrode application, the highly flaky graphene showed much higher specific capacitance than the agglomerated one in 1 M Li2SO4 electrolyte. The more accessible surface of the graphene reduced with KCl assistance effectively enhanced the electric double layer capacitance.
语种:
英文
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