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2008 Volume 24 Issue 7
2008, 24(07):
Abstract:
2008, 24(07): 1127-1131
doi: 10.1016/S1872-1508(08)60046-7
Abstract:
Monolith catalysts were prepared using TiO2 and ZrO2-TiO2 as supports with MnO2 as active component and Fe2O3 as promoter. The catalytic activities at low temperature and stability at high temperature for selective catalytic reduction of NOx with NH3...
2008, 24(07): 1132-1136
doi: 10.1016/S1872-1508(08)60047-9
Abstract:
A new volatile organic compound (VOC) combustion catalyst of 0.1%Pt-0.5%Pd/stainless steel wire mesh (SSWM) was prepared via anodic oxidation treatment. The result of activity tests for complete oxidation of toluene, acetone, and ethyl acetate showed...
A new volatile organic compound (VOC) combustion catalyst of 0.1%Pt-0.5%Pd/stainless steel wire mesh (SSWM) was prepared via anodic oxidation treatment. The result of activity tests for complete oxidation of toluene, acetone, and ethyl acetate showed...
2008, 24(07): 1137-1142
doi: 10.1016/S1872-1508(08)60048-0
Abstract:
A numerical study of hydrogen-enhanced liquefied petroleum gas (LPG)+air flames was presented. The variations of the adiabatic burning velocity in different conditions of combustion (φ=0.7-1.4) were studied extensively. The hydrogen content in the fu...
A numerical study of hydrogen-enhanced liquefied petroleum gas (LPG)+air flames was presented. The variations of the adiabatic burning velocity in different conditions of combustion (φ=0.7-1.4) were studied extensively. The hydrogen content in the fu...
2008, 24(07): 1143-1148
doi: 10.1016/S1872-1508(08)60049-2
Abstract:
A commercial activated carbon was modified by surface treatment using three chemicals, nitric acid, hydrogen peroxide, and ammonia, respectively. The modified carbons were characterized by N2 adsorption-desorption is otherms and FTIR spectroscopy. Th...
A commercial activated carbon was modified by surface treatment using three chemicals, nitric acid, hydrogen peroxide, and ammonia, respectively. The modified carbons were characterized by N2 adsorption-desorption is otherms and FTIR spectroscopy. Th...
2008, 24(07): 1149-1154
doi: 10.1016/S1872-1508(08)60050-9
Abstract:
The effect of cholesterol, desmosterol, stigmasterol, sitosterol, er sterol, and androsterol on the phase behavior of aqueous dispersions of dipalmitoylphosphatidylcholine (DPPC) was studied to understand the role of the side chain in the formation o...
The effect of cholesterol, desmosterol, stigmasterol, sitosterol, er sterol, and androsterol on the phase behavior of aqueous dispersions of dipalmitoylphosphatidylcholine (DPPC) was studied to understand the role of the side chain in the formation o...
2008, 24(07): 1155-1159
doi: 10.1016/S1872-1508(08)60051-0
Abstract:
A new energetic compound (TAGH)2(TNR) (TAG: triaminoguanidine, TNR: 2,4,6-trinitroresorcinol) was prepared by reacting triaminoguanidine with 2,4,6-trinitroresorcinol (styphnic acid) in aqueous solution under nitrogen atmosphere, and characterized by...
A new energetic compound (TAGH)2(TNR) (TAG: triaminoguanidine, TNR: 2,4,6-trinitroresorcinol) was prepared by reacting triaminoguanidine with 2,4,6-trinitroresorcinol (styphnic acid) in aqueous solution under nitrogen atmosphere, and characterized by...
2008, 24(07): 1160-1164
doi: 10.3866/PKU.WHXB20080707
Abstract:
SiC films were grown at substrate temperature of 900 ℃ by solid source molecular beam epitaxy (SSMBE) on Si(111) with different thicknesses (0, 0.2, 1 nm ) of Ge predeposited on Si prior to the epitaxy of SiC. The films were investigated with reflect...
SiC films were grown at substrate temperature of 900 ℃ by solid source molecular beam epitaxy (SSMBE) on Si(111) with different thicknesses (0, 0.2, 1 nm ) of Ge predeposited on Si prior to the epitaxy of SiC. The films were investigated with reflect...
2008, 24(07): 1165-1168
doi: 10.3866/PKU.WHXB20080708
Abstract:
Pure and Co-doped ZnO nanorods were synthesized by hydrothermal method at low temperature using Zn(NO3)2·6H2O and Co(NO3)2·6H2O as raw materials. The as-prepared samples were studied by XRD, EDS, TEM, and HRTEM, the photoluminescence (PL) property of...
Pure and Co-doped ZnO nanorods were synthesized by hydrothermal method at low temperature using Zn(NO3)2·6H2O and Co(NO3)2·6H2O as raw materials. The as-prepared samples were studied by XRD, EDS, TEM, and HRTEM, the photoluminescence (PL) property of...
2008, 24(07): 1169-1174
doi: 10.3866/PKU.WHXB20080709
Abstract:
In order to know more about the microcosmic structure of the important biochemical model molecule formamide (FM) in aqueous solution, the Optimized Potentials for Liquid Simulations-All Atom(OPLSAA) model were used in the molecular dynamics (MD) simu...
In order to know more about the microcosmic structure of the important biochemical model molecule formamide (FM) in aqueous solution, the Optimized Potentials for Liquid Simulations-All Atom(OPLSAA) model were used in the molecular dynamics (MD) simu...
2008, 24(07): 1175-1179
doi: 10.3866/PKU.WHXB20080710
Abstract:
LiCo1/3Ni1/3Mn1/3O2 was coated by a layer of Y2O3 via a simple method. The bared sample was immersed into Y(NO3)3·6H2O solution and then calcined at a certain temperature to get the coated material. The coated and bared LiCo1/3Ni1/3Mn1/3O2 meterials ...
LiCo1/3Ni1/3Mn1/3O2 was coated by a layer of Y2O3 via a simple method. The bared sample was immersed into Y(NO3)3·6H2O solution and then calcined at a certain temperature to get the coated material. The coated and bared LiCo1/3Ni1/3Mn1/3O2 meterials ...
2008, 24(07): 1180-1184
doi: 10.1016/S1872-1508(08)60052-2
Abstract:
The effects of nonelectrolytes (ureas, amino acids, sugars) on the cloud point (CP) of nonionic surfactant Triton X-114 (TX-114) and tetra-n-butylammonium bromide (TBAB) system were studied. Ureas as well as thioureas increased the CP. Behaviors of a...
The effects of nonelectrolytes (ureas, amino acids, sugars) on the cloud point (CP) of nonionic surfactant Triton X-114 (TX-114) and tetra-n-butylammonium bromide (TBAB) system were studied. Ureas as well as thioureas increased the CP. Behaviors of a...
2008, 24(07): 1185-1191
doi: 10.1016/S1872-1508(08)60053-4
Abstract:
The inhibition effect of 1,1’-thiocarbonyldiimidazole (TCDI) on the corrosion behaviors of mild steel (MS) in 0.5 mol·L -1 H2SO4 solution was studied with the help of potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and lin...
The inhibition effect of 1,1’-thiocarbonyldiimidazole (TCDI) on the corrosion behaviors of mild steel (MS) in 0.5 mol·L -1 H2SO4 solution was studied with the help of potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and lin...
2008, 24(07): 1192-1198
doi: 10.3866/PKU.WHXB20080713
Abstract:
High-crystallized β-zeolites with different silica-alumina molar ratios were successfully synthesized in extremely dense aqueous system using tetraethylammonium hydroxide (TEAOH) as template and solid silica gel as silica source, respectively. The si...
High-crystallized β-zeolites with different silica-alumina molar ratios were successfully synthesized in extremely dense aqueous system using tetraethylammonium hydroxide (TEAOH) as template and solid silica gel as silica source, respectively. The si...
2008, 24(07): 1199-1206
doi: 10.3866/PKU.WHXB20080714
Abstract:
Doped manganese oxide coating electrodes were prepared by pulse anodic electrodeposition. Their morphology, phase structure and electrochemical properties were studied by field emitted scanning electron microscopy (FESEM), scanning electron microscop...
Doped manganese oxide coating electrodes were prepared by pulse anodic electrodeposition. Their morphology, phase structure and electrochemical properties were studied by field emitted scanning electron microscopy (FESEM), scanning electron microscop...
2008, 24(07): 1207-1213
doi: 10.3866/PKU.WHXB20080715
Abstract:
The mechanisms of the reaction of peroxynitrous acid and tyrosine were studied using the density functional theory (DFT) at B3LYP/6-311G(d,p) level. The geometries of all the molecules were optimized; the harmonic vibration frequencies and the energi...
The mechanisms of the reaction of peroxynitrous acid and tyrosine were studied using the density functional theory (DFT) at B3LYP/6-311G(d,p) level. The geometries of all the molecules were optimized; the harmonic vibration frequencies and the energi...
2008, 24(07): 1214-1218
doi: 10.3866/PKU.WHXB20080716
Abstract:
In order to understand the synergistic effects between dielectric barrier discharge (DBD) plasmas and catalysts, the interactions between DBD and NO or NO/O2 saturated CuZSM-5 have been studied by adsorption and temperature programmed desorption (TPD...
In order to understand the synergistic effects between dielectric barrier discharge (DBD) plasmas and catalysts, the interactions between DBD and NO or NO/O2 saturated CuZSM-5 have been studied by adsorption and temperature programmed desorption (TPD...
2008, 24(07): 1219-1224
doi: 10.3866/PKU.WHXB20080717
Abstract:
Clustered and flowerlike CdS nanostructures were synthesized via the controllable solvent thermal
method using ethylenediamine as the structure-directing template. The phase structures and morphologies were measured by X-ray diffraction (XRD) and sca...
Clustered and flowerlike CdS nanostructures were synthesized via the controllable solvent thermal
method using ethylenediamine as the structure-directing template. The phase structures and morphologies were measured by X-ray diffraction (XRD) and sca...
2008, 24(07): 1225-1232
doi: 10.3866/PKU.WHXB20080718
Abstract:
For many engineering applications, it is important to obtain reliable data of the solubility of air in dimethyl silicone and hydraulic oils. Overcoming some drawbacks of previous methods for measuring gas-solubility, a new piston apparatus was establ...
For many engineering applications, it is important to obtain reliable data of the solubility of air in dimethyl silicone and hydraulic oils. Overcoming some drawbacks of previous methods for measuring gas-solubility, a new piston apparatus was establ...
2008, 24(07): 1233-1238
doi: 10.3866/PKU.WHXB20080719
Abstract:
We have studied the structural, energetical, and electronic properties of CdxZn1 -xO films in wurtzite structure and CdO in rocksalt, zinc blende, and wurtzite structures by the method of total energy plane-wave expansion with first-principles ultras...
We have studied the structural, energetical, and electronic properties of CdxZn1 -xO films in wurtzite structure and CdO in rocksalt, zinc blende, and wurtzite structures by the method of total energy plane-wave expansion with first-principles ultras...
2008, 24(07): 1239-1244
doi: 10.3866/PKU.WHXB20080720
Abstract:
The inhibition performance of four corrosion inhibitors in HCl mild steel corrosions, including 2-mercaptobenzimidazole (A), 2-amidobenzimidazole (B), 2-methylbenzimidazole (C), and benzimidazole (D), was theoretically evaluated using quantum chemist...
The inhibition performance of four corrosion inhibitors in HCl mild steel corrosions, including 2-mercaptobenzimidazole (A), 2-amidobenzimidazole (B), 2-methylbenzimidazole (C), and benzimidazole (D), was theoretically evaluated using quantum chemist...
2008, 24(07): 1245-1251
doi: 10.3866/PKU.WHXB20080721
Abstract:
The reaction mechanism of CH3SH with radical CN·was investigated by using B3LYP method with 6-311++G(d,p) basis set, and three reaction channels were found. The geometries of the reactants, intermediates, transition states, and products were optimize...
The reaction mechanism of CH3SH with radical CN·was investigated by using B3LYP method with 6-311++G(d,p) basis set, and three reaction channels were found. The geometries of the reactants, intermediates, transition states, and products were optimize...
2008, 24(07): 1252-1256
doi: 10.3866/PKU.WHXB20080722
Abstract:
Geometry structures, electronic structures, and magnetic properties of (CoCr)n (n=1-5) clusters were systematically investigated by using density functional theory with generalized gradient approximation (GGA). The ground state and metastable state o...
Geometry structures, electronic structures, and magnetic properties of (CoCr)n (n=1-5) clusters were systematically investigated by using density functional theory with generalized gradient approximation (GGA). The ground state and metastable state o...
2008, 24(07): 1257-1263
doi: 10.3866/PKU.WHXB20080723
Abstract:
The optimized stable (CH3)2S…ClOH halogen bond and (CH3)2S…HOCl hydrogen bond complexes were found on the potential energy surface by means of DFT-B3LYP/6-311++G**. The obvious red shifts of the 10Cl—11O and 12H—11O stretching vibrational frequencies...
The optimized stable (CH3)2S…ClOH halogen bond and (CH3)2S…HOCl hydrogen bond complexes were found on the potential energy surface by means of DFT-B3LYP/6-311++G**. The obvious red shifts of the 10Cl—11O and 12H—11O stretching vibrational frequencies...
2008, 24(07): 1264-1270
doi: 10.3866/PKU.WHXB20080724
Abstract:
Electrochemical reduction characteristics of fumaric acid (FA) and maleic acid (MA) at lead electrode were investigated by voltammetry, chronocoulometry, and electrochemical impedance spectrum (EIS). The corresponding transfer coefficients, apparent ...
Electrochemical reduction characteristics of fumaric acid (FA) and maleic acid (MA) at lead electrode were investigated by voltammetry, chronocoulometry, and electrochemical impedance spectrum (EIS). The corresponding transfer coefficients, apparent ...
2008, 24(07): 1271-1276
doi: 10.3866/PKU.WHXB20080725
Abstract:
The decomposition of CF4 in the absence of water on γ-Al2O3-based metal oxides was carried out to destruct the disposal perfluoro-carbons (PFCs) from industrial processes. In the present work, the conversion of CF4 was tested over bare γ-Al2O3 at dif...
The decomposition of CF4 in the absence of water on γ-Al2O3-based metal oxides was carried out to destruct the disposal perfluoro-carbons (PFCs) from industrial processes. In the present work, the conversion of CF4 was tested over bare γ-Al2O3 at dif...
2008, 24(07): 1277-1282
doi: 10.3866/PKU.WHXB20080726
Abstract:
Semiconductor behavior of epoxy resin coated on carbon steel immersed in 0.5 mol·L-1 sulfuric acid aqueous solution during its degradation was investigated. Potential (U)-capacitance (C) measurement and Mott-Schottky analysis technology were utilized...
Semiconductor behavior of epoxy resin coated on carbon steel immersed in 0.5 mol·L-1 sulfuric acid aqueous solution during its degradation was investigated. Potential (U)-capacitance (C) measurement and Mott-Schottky analysis technology were utilized...
2008, 24(07): 1283-1286
doi: 10.3866/PKU.WHXB20080727
Abstract:
To enhance the absorption in the visible region for TiO2, C and/or N doping of TiO2 nanotube was carried out by a novel method——plasma electrolysis. The doping was achieved with active C and Nproduced fromthe plasma electrolysis of HCONH2, NaNO2, or ...
To enhance the absorption in the visible region for TiO2, C and/or N doping of TiO2 nanotube was carried out by a novel method——plasma electrolysis. The doping was achieved with active C and Nproduced fromthe plasma electrolysis of HCONH2, NaNO2, or ...
2008, 24(07): 1287-1291
doi: 10.3866/PKU.WHXB20080728
Abstract:
Nanostructured CuF2 thin films were prepared by pulsed laser deposition on stainless steel substrates. The charge and discharge curves showed a high reversible capacity of 540 mAh·g-1, corresponding to 2.0 Li per CuF2. The cyclic voltammograms showed...
Nanostructured CuF2 thin films were prepared by pulsed laser deposition on stainless steel substrates. The charge and discharge curves showed a high reversible capacity of 540 mAh·g-1, corresponding to 2.0 Li per CuF2. The cyclic voltammograms showed...
2008, 24(07): 1292-1296
doi: 10.3866/PKU.WHXB20080729
Abstract:
Zn-Cu alloy nanocomposites were prepared directly from Zn-Cu alloy wire (w(Zn)=0.65)) by wire electrical explosion (WEE) method. The average particle size was in the range of 60-90 nm. Subsequently, Zn-Cu nanoparticles were oxidized to form ZnO-CuO n...
Zn-Cu alloy nanocomposites were prepared directly from Zn-Cu alloy wire (w(Zn)=0.65)) by wire electrical explosion (WEE) method. The average particle size was in the range of 60-90 nm. Subsequently, Zn-Cu nanoparticles were oxidized to form ZnO-CuO n...
2008, 24(07): 1297-1301
doi: 10.3866/PKU.WHXB20080730
Abstract:
The catalytic properties of PtSn/γ-Al2O3, PtSn/MCM-41 and PtSn/Al2O3/MCM-41 catalysts for propane dehydrogenation were studied using microreactor tests combined with X-ray diffraction (XRD), BET surface area and pore structure measurements, temperatu...
The catalytic properties of PtSn/γ-Al2O3, PtSn/MCM-41 and PtSn/Al2O3/MCM-41 catalysts for propane dehydrogenation were studied using microreactor tests combined with X-ray diffraction (XRD), BET surface area and pore structure measurements, temperatu...
2008, 24(07): 1302-1306
doi: 10.3866/PKU.WHXB20080731
Abstract:
Et4NBF4/LiPF6-based electrolytes were investigated to study the effects of the electrolytes with blend solvent EC+PC+DMC on the interface characteristics of graphite electrode. Cyclic voltammetry (CV) and charge-discharge test were used to examine th...
Et4NBF4/LiPF6-based electrolytes were investigated to study the effects of the electrolytes with blend solvent EC+PC+DMC on the interface characteristics of graphite electrode. Cyclic voltammetry (CV) and charge-discharge test were used to examine th...
2008, 24(07): 1307-1312
doi: 10.3866/PKU.WHXB20080732
Abstract:
Micromachining of magnesium alloy by confined etchant layer technique (CELT) was investigated. The variation of hydrogen ion concentration on the electrode surface during the electrochemical process was explored for some thermodynamically available“e...
Micromachining of magnesium alloy by confined etchant layer technique (CELT) was investigated. The variation of hydrogen ion concentration on the electrode surface during the electrochemical process was explored for some thermodynamically available“e...
2008, 24(07): 1313-1315
doi: 10.3866/PKU.WHXB20080733
Abstract:
The N3 dye, cis-Ru(H2dcbpy)2(NCS)2 (H2dcbpy=4,4’-dicarboxy-2,2’-bipyridyl), was demonstrated to be a highly selective luminescent and ratiocolorimetric sensors towards fluoride ion over chloride and bromide ions, by means of UV-Vis absorption and emi...
The N3 dye, cis-Ru(H2dcbpy)2(NCS)2 (H2dcbpy=4,4’-dicarboxy-2,2’-bipyridyl), was demonstrated to be a highly selective luminescent and ratiocolorimetric sensors towards fluoride ion over chloride and bromide ions, by means of UV-Vis absorption and emi...
2008, 24(07): 1316-1320
doi: 10.3866/PKU.WHXB20080734
Abstract:
The dilution enthalpies of N,N-dimethylformamide (DMF) in pure water and aqueous sodium chloride solutions were determined by using flow microcalorimetry at 298.15 K. The homogeneous enthalpic interaction coefficients in the range of sodium chloride ...
2008, 24(07): 1321-1325
doi: 10.3866/PKU.WHXB20080735
Abstract:
A novel real-time measurement method to determine the refractive index and the thickness of a polymer film during photobleaching process was proposed based on the non-scanning attenuated total reflection (ATR) technique. Several dark lines correspond...
A novel real-time measurement method to determine the refractive index and the thickness of a polymer film during photobleaching process was proposed based on the non-scanning attenuated total reflection (ATR) technique. Several dark lines correspond...
2008, 24(07): 1326-1328
doi: 10.3866/PKU.WHXB20080736
Abstract:
Lithium iron phosphate powders were prepared by hydrothermal synthesis, and coated using glucose as carbon precursor. The contact angles for calculating surface free energy of LiFePO4 powders with three probe liquids were measured. The surface free e...
Lithium iron phosphate powders were prepared by hydrothermal synthesis, and coated using glucose as carbon precursor. The contact angles for calculating surface free energy of LiFePO4 powders with three probe liquids were measured. The surface free e...
