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)).
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.
作者机构：
[Chen, Rixiong; Zhao, Yubao; Qin, Jun; Zhang, Na; Wu, Fengjiao] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Wu, Zhaofeng] Chinese Acad Sci, Fujian Inst Res Struct Matter, Fuzhou 350002, Peoples R China.
通讯机构：
[Zhao, Yubao] U;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
会议名称：
International Conference on Energy, Environment and Sustainable Development (ICEESD 2011)
会议时间：
OCT 21-23, 2011
会议地点：
Shanghai Univ Elect Power, Shanghai, PEOPLES R CHINA
会议主办单位：
Shanghai Univ Elect Power
会议论文集名称：
Advanced Materials Research
关键词：
Hydrothermal ion exchange;Li4Ti5O12;Nanostructures;Titanate
摘要：
Spinel Li4Ti5O12 nanostructures were synthesized by hydrothermal treatment of hydrogen titanate at 150 oC and further calcinated at 400~750 oC. Their physicochemical features were characterized by TG/DSC, XRD and TEM techniques. Results showed that the Li4Ti5O12 phase with its crystal size of tens of nanometers was likely produced by the reaction between Li2TiO3 and orthorhombic TiO2 upon thermal treatment, and such reaction would be exothermic.
摘要：
Metallic oxide/carbon composite has been extensively studied and widely used for energy storage in supercapacitor and lithium ion battery. In this paper, we synthesized nanograins-grafted nanorods of MoO2/carbon composites through a facile chemical reaction process without any template. Well crystallized MoO2 with monoclinic structure was identified in the XRD pattern. MoO2 nanograins with the size of 30-50nm were grown on the carbon nanorods, which were a few microns in length. Coupling of the rods-like carbon with good conductivity and the well distributed redox-active MoO2 leads to improved electrochemical performance. The cyclic voltammogram measurement shows that the as-prepared nanocomposites exhibit a broad potential window of 1.3V, which is extremely desired for supercapacitor application. The symmetrical supercapacitor of the nanograins-grafted nanorods of MoO2/carbon composites can work even at a high electric potential of 1.2V in aqueous electrolyte which seems impossible for many other metallic oxide and carbon composites.
摘要：
A magnesium metal organic framework, [NH_2(CH_3)_2][N(CH_3)_4][Mg_5(bpdc)_3(O_2CH)_6]?3H_2O (1, bpdcH_2 = 4,4'-biphenyldicarboxylic acid), has been solvothermally synthesized and structurally characterized. 1 crystallizes in the trigonal system, space group R-3, with a = 11.3427(3), c = 41.5662(18) ?, V = 4631.3(3) ?~3, Z = 3 and the final R = 0.0457. Its structure features a pillared-layered three-dimensional network with 8.21 ? cavities, in which cationic [NH_2(CH_3)_2]~+ or [N(CH_3)_4]~+ and lattice water molecules are located. Thermal stability of the title compound has also been investigated.
