搜索结果: 1-15 共查到“Sol-gel”相关记录84条 . 查询时间(0.041 秒)
The 19th International Sol-Gel Conference will be held on September 3-8, 2017 in Liege, Belgium. The conference is organized in conjunction with the International Sol-Gel Society (ISGS). Previous edit...
The sol-gel derived Co-Mn/TiO2 catalysts for light olefins production
Fischer-Tropsch synthesis light olefins characterization
2014/3/10
In this research work, two 30%(Co-Mn)/TiO2 catalysts were prepared using sol-gel (catalyst A) and co-precipitation (catalyst B) methods. The activity and selectivity to C2~4 light olefins in Fischer-T...
Low temperature CO oxidation over mesoporous CuFe2O4 nanopowders synthesized by a novel sol-gel method（图）
Carbon monoxide oxidation CuFe2O4 solid solution Sol-gel Nanopowder Propylene oxide Iron oxide
2013/9/25
Mesoporous CuFe2O4 solid solution nanopowders with high specific surface areas were synthesized by a novel, very simple and inexpensive sol-gel route using propylene oxide as gelation agent, and used ...
Microwave Assisted Sol-Gel Synthesis of MgO Nanoparticles and Their Catalytic Activity in the Synthesis of Hantzsch 1,4-Dihydropyridines（图）
magnesium oxide microwave-assisted sol-gel method nanoparticle Hantzsch 1,4-dihydropyridine
2013/10/5
A microwave-assisted sol-gel method was employed for the preparetion of nano-sized MgO particles using Mg(NO3)2·6H2O as precursor and deionized water as solvent. The sample calcined at 500 °C had a hi...
Sol-gel Transition of Methylcellulose Solution in the Coexistence of Hexadecyltrimethylammonium Bromide and Sodium Chloride
Sol-gel transition Methylcellulose NaCl HTAB
2012/4/5
The sol-gel transition of methylcellulose (MC) solution in the presence of NaCl and hexade-cyltrimethylammonium bromide (HTAB), together with MC/NaCl solution in the presence of HTAB and MC/HATB solut...
Sol-Gel Materials with Pesticide Delivery Properties
Sol-Gel Tetraethylorthosilicate Colloidal Silica Trichlorfon Cyclodextrin
2013/3/13
Pesticides are widely used in agriculture, although they may create hazards both to humans and to the environment. In order to reduce the harmful effects of their administration, there has been made a...
A Reusable Capacitive Immunosensor Based on a CuS Ultrathin Film Constructed by Using a Surface Sol-Gel Technique
Reusable Capacitive Immunosensor Based CuS Ultrathin Film Constructed Surface Sol-Gel Technique
2010/9/17
A capacitive sensing method based on a CuS ultrathin film modified electrode prepared by a surface sol-gel technique has been developed for the direct detection of human IgA. The resulting CuS film wa...
A Reflectance Flow-through Thionine Sol-gel Sensor for the Determination of Se(IV)
Reflectance Flow-through Thionine Sol-gel Sensor Determination of Se
2010/9/13
In this work, a reversible sensor to assess the total Se(IV) content in samples is described. Pre-activated glass slides were spin-coated with 100 μL of a 20-h aged sol-gel mixture of 1 mL of tetrame...
纳米晶钛酸钡的Sol-gel法制备及其尺寸效应
BaTiO3 尺寸效应 XRD 相变
2010/1/5
采用sol-gel法制备了不同粒径的钛酸钡（BT）纳米晶粉. XRD、Raman光谱和DSC测试结果显示,随着退火温度的升高，晶粒长大，晶胞的a轴逐渐减小， c轴逐渐增大.粒径在54 nm左右时，钛酸钡由顺电立方相向铁电四方相结构转变，在立方-四方相变过程中，晶胞略微膨胀.随着粒径的减小，正交-四方相变温度升高，四方-立方相变温度降低， Raman谱峰降低和宽化，粒径为38 nm左右时四方相的特征...
Physical Characteristics of Titania Nanofibers Synthesized by Sol-Gel and Electrospinning Techniques
Titania Nanofibers Synthesized Sol-Gel Electrospinning Techniques
2010/9/20
Titania nanofibers were successfully synthesized by sol-gel coating of electrospun polymer nanofibers followed by calcining to form either the pure anatase or rutile phases. Characterization of these ...
Sol-gel自蔓燃法控制合成二氧化钛纳米粉体及性能
Sol-gel自蔓燃 二氧化钛 纳米粉体 控制合成
2009/12/3
采用化学络合溶胶-凝胶法,结合自蔓燃合成工艺制备了结构可控、分散性良好的TiO2纳米粉体.考察了原料组成、凝胶膨胀程度和温度机制对粉体结构、分散性的影响,用漫反射光谱测试了所制备粉体的光吸收性能. 结果表明,将原料中氧化剂与还原剂的摩尔比从2增加到7,在600 ℃的煅烧温度下可以得到金红石含量在25％～68.2％之间的TiO2,这些结构不同的粉体粒度为30 nm左右;凝胶前驱体经过150 ℃充分膨...
用荧光光谱跟踪钙-海藻酸水溶液的Sol-gel转变
Sol-gel转变 物理凝胶化 荧光光谱 海藻酸
2009/11/13
为了克服传统方法在测定凝胶化点的同时, 作用力对物理交联点的破坏和对大分子链运动的干扰, 探索和建立不施加应力的凝胶化点测定方法, 采用荧光光谱跟踪了异硫氰酸荧光黄(FITC)标记海藻酸与钙离子在水溶液中螯合的物理凝胶化. 随着凝胶化的进行, 荧光相对强度和各向异性比在凝胶化时间曲线的80 min时出现了明显的转折点, 与Winter方法得到的凝胶化点(80 min)完全一致. 因此可以利用...
In Vitro Study of Dentinal Tubule Occlusion with Sol-gel DP-bioglass for Treatment of Dentin Hypersensitivity
Sol-gel Bioglass Dentinal tubules
2009/9/14
DP-bioglass paste has been demonstrated to produce 60 μm of sealing depth on exposed dentinal tubules. However, the occlusive effect depended on a continuous placement of DP-bioglass paste on dentinal...
Effects of Sodium Chloride on the Sol-Gel Transition of Agar, κ-Carrageenan and Gellan Gum
sodium chloride DSC loss modulus agar κ-carrageenan gellan gum
2009/8/26
The sol-gel transition of agar, κ-carrageenan and gellan gum in the presence of sodium chloride (NaCl) were investigated by thermal and rheological measurements. The G', G" and DSC curves for the agar...
Design of Solid Catalysts by Sol-gel Method Using Organic Polydentate Ligands and Their Catalytic Performance
Solid catalyst Catalyst design Sol-gel method Thermostable metal oxide
2009/8/4
Advantages and effectiveness of using an organic polydentate ligand in the sol-gel process were discussed. The sol-gel method using the ligand was presented herein for preparation of metal oxides inc...