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Online since: January 2013
Authors: Rukkiat Jitchati, Yuranan Thathong, Kittiya Wongkhan
Two Ruthenium Complexes with Phenanthroline Ligand for Dye-Sensitized Solar Cells Yuranan Thathong,1, a Kittiya Wongkhan1, b and Rukkiat Jitchati1, c * 1 Center for Organic Electronic and Alternative Energy (COEA), Department of Chemistry, Faculty of Science, Ubon Ratchathani University, Warinchumrap, Ubon Ratchathani Province, 34190, Thailand su_dkhobfa@hotmail.com,a kitt_w_2000@yahoo.ie,b rukkiat_j@hotmail.com c Keywords: dye-sensitized solar cells (DSCs), ruthenium complexes dye, phenanthroline Abstract.
The structure of the highly efficient ruthenium sensitizer N719, Z907 and YX360 dyes Herein, we report the synthesis of phenanthroline and bipyridine ligand where all starting materials and both complexes were characterized by 1H and 13C NMR.
Bäuerle, Metal-free organic dyes for dye-sensitized solar cells: from structure:property relationships to design rules, Angew.
Palomares, Dye structure-charge transfer process relationship in efficient ruthenium-dye based dye sensitized solar cells, Energy Environ.
Online since: August 2014
Authors: Chun Yan Diao, Hua Zhong He
Comparative Analysis of Performance for SCR De-NOx Catalysts in Power Plant Chunyan Diao1,a, Huazhong He1,b 1 College of Chemistry and Environmental Science, Guizhou Minzu University, Guiyang 550025, China adiaoxuanji@126.com, b252493642@qq.com Keywords: SCR De-NOx Catalyst, Performance Analysis, Market Adaptation Abstract.
The rational selection of aperture and structure of catalysts in design catalysts is important means to reduce pressure drop of the catalyst itself.
The flatbed and honeycomb catalysts have the same main ingredients and the same principles of catalytic reaction, only structures are different.
Table 1 Comparison of three kinds of commercial catalysts Performances Flatbed Catalyst Honeycomb Catalyst Corrugated Catalyst Anti-clogging properties ▲▲▲▲ ▲▲ ▲▲▲ Dust erosion resistance ▲▲▲▲ ▲▲▲ ▲▲▲▲▲ Pressure loss ▲▲▲▲▲ ▲▲▲▲ ▲▲▲ Denitration efficiency ▲▲▲▲ ▲▲▲▲▲ ▲▲▲▲△ Specific surface area ▲▲▲ ▲▲▲▲▲ ▲▲▲▲△ Sootblower frequency ▲▲▲▲ ▲▲ ▲▲ Resistance of thermal shock ▲▲▲▲▲ ▲▲▲ ▲▲▲▲▲ SO2/SO3 conversion rate ▲▲▲▲ ▲▲▲ ▲▲▲△ Supporting structure load ▲▲▲ ▲▲▲▲ ▲▲▲▲▲ Weight[kg/m3] ▲▲▲▲▲ ▲▲▲▲ ▲▲ Antitoxic ability ▲▲▲ ▲▲▲ ▲▲▲▲ Durability ▲▲▲▲▲ ▲▲▲▲ ▲▲▲▲▲ Regeneration ▲▲▲▲▲ ▲▲▲▲▲ ▲▲▲▲▲ Economics ▲▲▲ ▲ ▲▲▲▲▲ Applied gas environment High ash and strong ash viscousness Ash ≦ 30 [g/m3] and Smaller viscousness Ash ≦ 30 [g/m3] or lower ash content Development and Market Analysis of De-NOx Catalyst The catalysts is the core technology of SCR de-NOx system.
Online since: March 2012
Authors: Sergei Zhevnenko, Eugene Gershman
.% Co Solid Solution Sergey Zhevnenkoa and Eugene Gershmanb National University of Science and Technology “MISIS” Moscow, Leninsky pr. 4, 119049, Russia Department of physical chemistry azhevnenko@misis.ru, bgershmanei@gmail.com Keywords: viscosity, diffusional creep, copper, cobalt, grain boundary, activation energy Abstract.
Anyway the temperature dependence of viscosity η is the same for all cases when the grain structure is stabilized: η ~ T/D and D = D0exp(-E/RT).
Knowledge of this characteristic can help us to understand the surface processes like adsorption and structure changes.
After pre-annealing the grain size of stabilized parquet structure was about 170 μm.
Online since: July 2004
Authors: P. Dorenbos, E. Zych, J. Trojan-Piegza, L. Kępiński
Dorenbos 3, 1 Faculty of Chemistry, University of Wrocław, 14 F.
Joliot-Curie Street, 50383 Wrocław, Poland 2 Institute for Low Temperature and Structure Research, Polish Academy of Sciences, Wrocław, Poland 3 Delft University of Technology, Interfaculty Reactor Institute, Mekelweg 15, 2629 JB Delft, The Netherlands Keywords: Lu2O3, luminescence, radioluminescence, X-ray detection, nanocrystalline luminophors Abstract: Nanocrystalline powders of Lu2O3:Eu with activator content varying between 0.2%-10% were prepared using four different methods of synthesis.
Lu2O3 has another benefit since it crystallizes in a cubic structure [8,9].
The particles form chain-type structures.
Online since: December 2009
Authors: Atthakorn Thongtha, Theerachai Bongkarn
The diffraction synthesis lines were indexed on the basis of a orthorhombic structure matched with a JCPDS file number 10-0268.
SrZrO3 ceramics were identified as a single phase when heated at 1550 oC for 6 h as shown in Fig. 5 and had a perovskite structure which had an orthorhombic symmetry.
The calcinations and sintering temperatures have a strong influence on the crystal structure, homogeneity and microstructure of the calcined powders and the sintered ceramics.
Scherer, "The Physics and Chemistry of Sol-Gel Processing", Sol- Gel Science - Academic Press, New York, 1990
Online since: September 2011
Authors: Ze Rong Li, Zhi Qin Cao, Min Xian Fang
Their crystal structure can be seen in table 1[4].
Table 1 Crystal structure of some vanadium compounds Compound V2O5 VO2 V2O3 VC Crystal structure rhombic lattice cubic lattice rhombic lattice f.c.c Fig.1 V-O phase-diagram The thermodynamic analysis of reaction process.
(In Chinese) [6] Z.L.Wang, Y.P.Zhou: Physical chemistry.
Online since: December 2007
Authors: Czesław Ślusarczyk, Kazimiera Suchocka-Gałaś
Poly(ethylene oxide)/Styrene Ionomers Blends: Crystallization of Poly(ethylene oxide) Component Studied by Wide-angle X-ray Diffraction Czesław Ślusarczyk1, a, Kazimiera Suchocka-Gałaś2, b 1 Institute of Textile Engineering and Polymer Materials, University of Bielsko-Biała, Willowa 2, 43-309 Bielsko-Biała, Poland 2 Faculty of Chemistry, Nicolaus Copernicus University, Gagarina 7, Toruń, Poland a cslusarczyk@ath.bielsko.pl , b kazg@chem.uni.torun.pl Keywords: polymer blends, ionomers, PEO, crystallinity, WAXD Abstract.
This suggests that the ordered structure between PEO chains is affected more than that for the chain direction.
This lamellar structure was investigated previously by means of SAXS method [2].
Eisenberg, in: Ionomers: synthesis, structure, properties and application, edited by M.R.
Online since: January 2012
Authors: Qian Sun, Ming Yang, Kui Zhou, Zhi Zuo Yang
Preparation and Surface Modification of Fe3o4@Sio2 Composite Microspheres* Kui Zhou, Ming Yang, Qian Sun and Zhizuo Yang School of Chemistry and Environmental Engineering, Wuhan Polytechnic University, ChangQing Garden, Hankou, Wuhan 430023, China yangmpu@yahoo.com.cn Key Words: Magnetite; Composite microspheres; SiO2; Fe3O4.
Scanning electron microscopy was performed using a Hitachi S-3000N instrument to study the morphological characteristics of magnetic particles, samples were dispersed in ethanol and a drop of this dispersion was placed on copper grid; Fourier transform infrared spectra of the products were recorded in KBr pellets on an AVATAR 330 spectroscopy to investigate the variation in surface chemical structure of the nanoparticles.
Fifty scans of the region between 400 and 4000 cm-1 were collected for each FT-IR spectrum recorded, and lank scanning was performed before measurements to eliminate the influence of water vapor and CO2 in air; X-ray diffraction patterns of the samples were collected on a Shimadzu X-ray diffractometer XD-3A (Cu Kαradiation, λ= 0.15418nm) at 36 KV and 20 mA to show the crystal structure of the particles; The vibrating-sample magnetometer (HH-15, CHA) was used to analyse the magnetic properties of magnetite particles at room temperature.
Fig.3a displays obvious six diffraction peaks in the 2θ region of 20-80°, which can be coincided well with the standard pattern of Fe3O4 [13].As shown in Fig.3b, the intensity of absorption peaks weakened but the peak positions were unchanged, indicating that magnetite nanoparticles coated by silane did not change the typical spectra of magnetite, and the crystalline structure of the magnetite was essentially maintained after magnetite coated by silane.
Online since: August 2003
Authors: Kunihito Koumoto, Yoshitake Masuda, Yan Feng Gao
Dielectric Characteristics of SrTiO3 Precursor Thin Film Prepared on Self-assembled Monolayers by the Liquid Phase Deposition Method Yanfeng Gao, Yoshitake Masuda, Kunihito Koumoto Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan Keywords: strontium titanate, amorphous, thin film, liquid-phase deposition method, dielectric property ABSTRACT We evaluated the dielectric properties of amorphous SrTiO3 precursor thin films in relation to the film thickness and morphology.
At the applied frequency of 100 kHz, the C - V curve of the MOS structure demonstrated clear accumulation, depletion and inversion regions.
This kind of behavior of MOS structures has been interpreted as evidence of the charge trapping at the negative gate bias [3].
0.3 0.4 0.5 0.6 0.7 0.8-0.4 -0.2 0 0.2 0.40 20 40 60 80 100 120 140 160 Frequency: 100 kHz Thickness: 115 nm ↑ ↑ ↑ ↑ Electric Field / MV⋅cm-1 0 5 10 15 20 25 30 35 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07 0.1 1 10 103 104 105 106 107 → ← Permittivity Dissipation Factor Frequency / Hz Bias voltage: -1 V (b) 0 5 10 15 20 25 30 35 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07 0.1 1 10 103 104 105 106 107 → ← Permittivity Dissipation Factor Frequency / Hz Bias voltage: -1 V (b) Capacitance/nF⋅cm-2 Dissipation Factor 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8-0.4 -0.2 0 0.2 0.40 20 40 60 80 100 120 140 160 Frequency: 100 kHz Thickness: 115 nm ↑ ↑ ↑ ↑ Electric Field / MV⋅cm-1 Capacitance/nF⋅cm-2 Dissipation Factor 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8-0.4 -0.2 0 0.2 0.40 20 40 60 80 100 120 140 160 Frequency: 100 kHz Thickness: 115 nm ↑ ↑ ↑ ↑ Electric Field / MV⋅cm-1 Fig. 2 (a) C-V characteristics of the Au/STO/p-Si structure
Online since: April 2004
Authors: Ai Kah Soh, Xiu Xi Wang, Z.H. Sun, Heng An Wu
With molecular dynamics techniques, many atomistic simulations on mechanical behaviors of metal nanowire, such as structure and stability [3-4], deformation and fracture [5-11], elastic properties [12-14] have been performed in the recent past.
This demonstrates that surface atoms play an important role in the mechanical behaviors of nano structures, and the size effect commonly found in small-scale systems is the surface effect.
From macroscopic viewpoint, 10 7/s-10 8/s is deemed very high strain rate for any materials and structures.
N.I.Kovtyukhova and T.E.Mallouk, Chemistry-A European Journal, 8 (2002) p. 4355 3.