Solid State Phenomena
Vol. 134
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Solid State Phenomena
Vols. 131-133
Vols. 131-133
Solid State Phenomena
Vol. 130
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Solid State Phenomena
Vol. 129
Vol. 129
Solid State Phenomena
Vol. 128
Vol. 128
Solid State Phenomena
Vol. 127
Vol. 127
Solid State Phenomena
Vols. 124-126
Vols. 124-126
Solid State Phenomena
Vols. 121-123
Vols. 121-123
Solid State Phenomena
Vol. 120
Vol. 120
Solid State Phenomena
Vol. 119
Vol. 119
Solid State Phenomena
Vol. 118
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Solid State Phenomena
Vols. 116-117
Vols. 116-117
Solid State Phenomena
Vol. 115
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Solid State Phenomena Vols. 124-126
Paper Title Page
Abstract: Niobium- and tantalum-containing mesoporous molecular sieves MCM-41 have been
synthesized, and applied as a catalyst for vapor phase Beckmann rearrangement of cyclohexanone
oxime to ε-caprolactam. NbMCM-41 catalyst exhibited high catalytic performance in the vapor
phase Beckmann rearrangement of cyclohexanone oxime. The oxime conversions were almost
100% and the lactam selectivities were around 80%. The lactam selectivities of NbMCM-41
catalyst were higher than those of AlMCM-41 catalyst. However, TaMCM-41 catalyst exhibited
lower catalytic performance than AlMCM-41 catalyst, and it was fast deactivated with time. These
results may be due to the acidity difference among the catalysts. The results from NH3-TPD showed
that NbMCM-41 catalyst possessed weak and medium acid sites, while TaMCM-41 catalyst
possessed only very weak acid sites. AlMCM-41 catalyst also exhibited only weak acid sites.
1761
Abstract: Silica supported nickel molybdenum phosphides (NiMoP/SiO2) were successfully
prepared by temperature-programmed reduction (TPR) reaction of phosphorous-impregnated nickel
molybdenum oxides (NiMoO4) precursors with hydrogen at relatively low temperatures (530 – 590
oC) and characterized by Fourier transform-Infrared spectrometry (FT-IR), X-ray diffraction (XRD),
Electron probe microanalysis (EPMA) and Temperature-programmed reduction reaction (TPR). The
process of solid transformation and properties of materials prepared from ammonium hydrogen
phosphate (AMP)-impregnated samples were compared with those of phosphide made from
phosphoric acid (PAC)-impregnated samples. Results show that the formation of a single NiMoP
phase on silica significantly depends on reduction rates, phosphorous sources and phosphorous
loadings. A single phase of NiMoP on SiO2 was particularly promoted at a below 5 oC/min of
reduction rate and the starting molar ratio of Ni/Mo/P=1/1/1. A single phase of crystalline NiMoP
on silica was produced from AMP-impregnated samples, while other phases of MoP, Ni2P, or
NiMoP2 were appeared from PAC-impregnated samples with loading. The new phase of NiMoP2
was occurred with increasing phosphorous loading (above Ni/Mo/P=1/1/2.5) as a result of
facilitated contact on the surface between the Ni-Mo bimetallic component and the phosphorous
reagent
1765
Abstract: Pt nano particles were synthesized on carbon nanotubes (CNTs) by chemical vapor
deposition (CVD). (Trimethyl)methylcyclopentadienyl platinum (MeCpPtMe3) was used as Pt
precursor, which was vaporized at 70oC and delivered to the pretreated CNTs at the reactor. The CVD
was performed at various temperatures, 80~270oC with various gas flows. Consequently, Pt nano
particles of 1~2 nm size were synthesized by CVD, which is much smaller than the Pt particles
prepared by wet impregnation and by electrochemical deposition. The surface characterizations of
Pt/CNT catalysts were performed by XRD, HR-TEM, CO chemisorption, etc.
1769
Abstract: Surface characteristics of anodic titania formed by electrochemical method and effects of
electrolytic mediums on microstructures of anodic TiO2 layer were investigated. The titania film
formed in sulfuric acid or mixture electrolyte with sulfuric and phosphoric acids shows porous cell
structures. But the films formed in sulfuric acid represent smaller cell structures than those formed in
the mixture electrolyte, and the change in microstructural parameters is associated with electrolytes.
However, when titanium substrate was anodized in HF, surface morphologies and structures of
anodic titania film greatly changed, forming self-organized TiO2 nanotubes.
1773
Abstract: Anodic oxide films were formed on titanium using an electrolyte solution containing
phosphoric acid for dental implants by an electrochemical method. The parameters of the oxidation
process were current density and electrolyte concentration. The micro structural morphology,
surface roughness, thickness of the oxide layer and the behavior of voltage-time curves were
examined. The results show that the surface roughness, porosity size and the thickness of the oxide
layer showed similar trends as the process parameters were changed. The surface morphology of the
samples was observed for different current densities at a constant electrolyte concentration. The
pore size, thickness and roughness of the anodic oxide films are directly proportional to the
maximum voltage and the slope of the voltage to time transient (dV/dt) curves during the growth of
the galvanostatic anode oxide film on plate type Ti.
1777
Abstract: In this study, we modified the surface of nanoporous carbons with carboxymethylated
polyethyleneimine (CM-PEI) of a high charge density in order to increase the Pt loading on the
nanoporous carbons in an aqueous solution. We carried out equilibrium adsorption tests of Pt(IV) on
the pure nanoporous carbon and the CM-PEI-coated carbons and evaluated the adsorption isotherm
on the CM-PEI-coated carbon using various isotherm models. It was found that the adsorption of
Pt(IV) onto the CM-PEI-coated carbons obeys the Langmuir isotherm model.
1781
Abstract: A first and efficient procedure has been developed for microwave-assisted transfer
hydrogenation of ketones. Silica gel-supported ligand 2 has been prepared for the transfer
hydrogenation. This immobilized ligand-Ru complex acted as an efficient catalyst for the hydrogen
transfer reaction of ketones. The MW-assisted reactions using the supported ligand 2 could reach
completion within 20~40 min.
1785
Abstract: Coatings of hydroxyapatite (HA) on the porous-surfaced Ti compact have been
conducted by electrostatic spray deposition (EDS). The precursor solution for the HA coating by
ESD was prepared by mixing nano-scaled HA powder with ethyl alcohol. As-deposited HA films on
the substrate were heat-treated (400 ~ 900 °C) and their physical characteristics were investigated
by Scanning Electronic Microscopy (SEM), X-ray Diffractometer (XRD), and X-ray
Photoelectronic Spectroscopy (XPS). As-deposited HA films were consisted of HA particles which
were uniformly distributed on the Ti substrate, showing a porous structure. By heat treatment, HA
particles were agglomerated each other and melted to form a highly dense and homogeneous
coating layer consisted of equiaxed nano-scaled grains. HA coatings on the porous-surfaced Ti
compact consisted of highly crystalline apatite phase with the Ca/P ratio of about 1.67 were
successfully obtained by using ESD.
1789
Abstract: The photo-catalytic hydroxylation of phenol with hydrogen peroxide was carried out over
TS-1 and Ti-MCM-41 catalysts. For comparison, the dark (thermal)-catalytic hydroxylation of
phenol was also performed. The difference in catalytic behaviors of TS-1 and Ti-MCM-41 and
product distribution in both the reactions were investigated. The TS-1 and Ti-MCM-41 catalysts
having the Si/Ti ratio of 50 were prepared by in-situ crystallization and characterized using XRD,
UV-DRS. In the all reactions, the main products were catechol (CAT), hydroquinone (HQ) and
benzoquinone (BQ). In dark (thermal)-reaction, TS-1 showed a higher catalytic activity than Ti-
MCM-41. In photo-reaction, however, the activity of Ti-MCM-41 was comparable to that of TS-1.
The conversion of phenol and the selectivity to CAT in the photo-catalytic reaction were higher than
those in dark (thermal)-reaction. In the all reactions, the selectivity to CAT increased remarkably
when the selectivities to HQ and BQ decreased with reaction time.
1793
Abstract: Nickel oxide supported on zirconia and modified with MoO3 for acid catalysis was
prepared by drying powdered Ni(OH)2-Zr(OH)4 with ammonium heptamolybdate aqueous solution,
followed by calcining in air at high temperature. The characterization of prepared catalysts was
performed using FTIR, Raman, XRD, and DSC. MoO3 equal to or less than 15 wt% was dispersed on
the surface of catalyst as two-dimensional polymolybdate or monomolybdate, while for MoO3 above
15 wt%, crystalline orthorhombic phase of MoO3 was formed. The high acid strength and acidity were
responsible for the Mo=O bond nature of the complex formed by the interaction between MoO3 and
ZrO2. The catalytic activity for cumene dealkylation was correlated with the acidity of the catalyst
measured by the ammonia chemisorption method
1797