搜索结果: 136-150 共查到“知识库 元素化学”相关记录210条 . 查询时间(3.375 秒)
The direct combination of hydrogen and oxygen to form hydrogen peroxide in liquid media with prepared catalysts was carried out in a slurry reactor at atmospheric pressure and room temperature. An O2/...
Activation of Light Alkanes on Pure and Fe and Al Doped Silica Clusters: A Density Functional and ONIOM Study
C-H bond activation methane ethane, silica Fe doping Al doping density functional DFT ONIOM
2010/4/16
C-H bond activation was studied by use of density functional theory (DFT) and ONIOM calculations as implemented in Gaussian 2003 at the B3LYP level utilising 6-31G* as the basis set for Si, Al, and Fe...
添加剂对SiO电性能的影响及其机理分析（Electrochemical Performances of SiO: Effects of Additive and Mechanism）
SiO 负极 锂离子电池 电化学性能
2010/8/18
SiOx/CoO and SiO/Li2CO3 composite materials were prepared by mechanical ball-milling. The structures of the obtained materials were characterized by X-ray diffraction (XRD). And scanning electron micr...
本文研究了酮在LnCl~3/K (Ln=Nd,Gd)及K作用下的反应,并发现共轭酮发生还原偶联, 脂肪酮发生羟醛缩合.并给出了可能的机理.
N,N`-Bis(1`-hydroxy-2`-acetonaphthone)propylenediamine: Synthesis, Extractive Properties, and Use as an Ionophore in a Cu(II)-Selective Potentiometric Sensor
propylenediamine Synthesis, Extractive Properties Use as an Ionophore Selective Potentiometric Sensor
2010/4/16
The binding ability of N,N'-bis(1'-hydroxy-2'-acetonaphthone)propylenediimine (H2L) towards metal ions was investigated by performing liquid-liquid extraction experiments to extract Cu2+, Ni2+, Co2+, ...
Template-Free Synthesis of ZSM-5 Type Zeolite Layers on Porous Alumina Disks
ZSM-5 template-free synthesis zeolite layer zeolite membrane
2010/4/19
ZSM-5 crystals were synthesized from template-free batches on macroporous a-alumina disks. The SiO2/Al2O3 ratio of the synthesis gel influenced the crystal morphology, surface coverage and intergrowth...
Synthesis and Spectroscopic Characterization of New [Cu(tBusalpphen)]2, [MoCl2(salpphen)]2 Complexes and Sn2Cl8(tBusalpphen).2HNEt3 Adduct
Copper(II) complex molybdenum(IV) complex Schiff base complexes tin(IV) adduct tetradentate Schiff base ligands
2010/4/19
Tetradentate Schiff base ligands, which were derived from the condensation of phenylenediamine with salicylaldehyde [salpphenH2: N, N'-p-phenylene-bis(salicyclideneimine)] or 3,5-di-tert-butyl-2-hydro...
On-Line Preconcentration and Speciation of Chromium by an 8-Hydroxyquinoline Microcolumn Immobilized on Surfactant-Coated Alumina and Flow Injection Atomic Absorption Spectrometry
Chromium speciation on-line preconcentration 8-hydroxyquinoline alumina flow injection
2010/4/19
An on-line technique for the determination of chromium species with atomic absorption spectrometry is described. The method is based on separation and preconcentration of Cr(III) on a microcolumn of i...
化学气相沉积法制备氧化锡自组装纳米结构
化学气相沉积 氧化锡 可控制生长
2010/2/3
采用化学气相沉积法在镀有5-10 nm厚金膜的SiO2衬底上, 通过控制生长条件, 实现了二氧化锡纳米结构的自组装生长, 成功制备出了莲花状和菊花状的二氧化锡自组装纳米结构. 利用扫描电子显微镜、X射线衍射等表征分析手段对样品的表面形貌、结构及成份进行表征和研究. 并在此基础上, 讨论了两种自组装纳米结构的生长机制.
Examination of Gold as a Metal Promoter of Sulphated Zirconia in n-Heptane Isomerisation at Low Temperature
Examination of Gold in n-Heptane Isomerisation Low Temperature
2010/4/19
Isomerisation of nC7 over a sulphated zirconia (SZ)-based bifunctional catalyst was studied at 150 °C. Au, Ir, Pd and Pt were used as promoters of SZ. The first objective was the production of C7 isom...
Synthesis and Spectral Characterisation of Chloro Organotin(IV) di[3(2`-hydroxyphenyl)-5-(4-substituted phenyl) Pyrazolinates]
Organotin(IV) pyrazolinates Sn NMR
2010/4/19
Chloro organotin(IV) dipyrazolinates of the type RSnCl(C15H12N2OX)2 [where C15H12N2OX = 3(2'-Hydroxyphenyl)-5(4-X-phenyl)pyrazoline {where X = H (a); CH3 (b); OCH3 (c); Cl (d) and R = Me, Prn and Ph] ...
Cerium(III) Ion-Selective Electrodes Based on 1,4,7-Trithiacyclononane
Cerium(III)-selective electrode coated platinum wire electrode plasticized polymeric membrane electrode
2010/4/19
Novel plasticized polymeric membrane (PPME) and coated platinum wire (CPWE) electrodes based on 1,4,7-trithiacyclononane and oleic acid, as a good lipophilic additive for highly selective determinatio...