Photoelectrochemical properties of sol–gel-derived Ti1−xVxO2 solid solution film photoelectrodes

2002 ◽  
Vol 410 (1-2) ◽  
pp. 14-20 ◽  
Author(s):  
Gaoling Zhao ◽  
Gaorong Han ◽  
Masahide Takahashi ◽  
Toshinobu Yoko
1999 ◽  
Vol 339 (1-2) ◽  
pp. 123-128 ◽  
Author(s):  
Gaoling Zhao ◽  
Hiromitsu Kozuka ◽  
Hong Lin ◽  
Toshinobu Yoko

2018 ◽  
Vol 56 (1A) ◽  
pp. 197
Author(s):  
Nguyen Hoang Tuan

In this study, we present some results on the structure and properties of the solid solution of Bi0.5K0.5TiO3– BiFeCoO3 (BKT – BFCO) by Sol-gel method. Crystal structures of BKT – BFCO solid solutions were studies by XRD and Raman spectroscopy. The results were in good agreement with the previous reports of Bi0.5K0.5TiO3– BiFeO3 (BKT – BFO) and Bi0.5K0.5TiO3 – BiCoO3 (BKT – BCO) solid solutions. The magnetic properties were investigated via unsaturated M-H loop, which showed the competition of paramagnetic and antiferromagnetic ordering in BKT – BFCO. However, differing from the BKT – BFO and BKT – BCO solid solutions, the unclear values of saturated magnetism in BKT – BFCO raised the unexplained question, which needed further studies.


2006 ◽  
Vol 510-511 ◽  
pp. 286-289
Author(s):  
Hao Wang ◽  
Wei Min Wang ◽  
Zheng Yi Fu ◽  
Tohru Sekino ◽  
Koichi Niihara

Mullite-based nanocomposites with embedded FeCr alloy nanoparticles were synthesized by reduction of sol-gel prepared Al5.4(Fe0.8Cr0.2)0.6Si2O13 solid solution in hydrogen. The feature of the formation of FeCr alloy is characterized by XRD analysis. Structural characterization revealed that the intragranular FeCr alloy nanoparticles along with inter-granular iron grains were obtained in as reduced sample. After acid washing, the intergranular metal grains were eliminated. The static magnetic properties of nanocomposite powders were studied using Magnetic Property Measurement System. It is found that part of the intra-granular metal nanoparticles have superparamagnetic behavior at room temperature.


2001 ◽  
Vol 51 (1) ◽  
pp. 37-41 ◽  
Author(s):  
Kui Cheng ◽  
Ge Shen ◽  
Wenjian Weng ◽  
Gaorong Han ◽  
Jose M.F. Ferreira ◽  
...  

2002 ◽  
Vol 16 (28n29) ◽  
pp. 4465-4468 ◽  
Author(s):  
GAOLING ZHAO ◽  
GAORONG HAN

Titanium-vanadium oxide films were prepared by the sol-gel method. The effects of vanadium incorporation on the crystallization behavior TiO 2 were investigated by X-ray diffraction analysis. The results showed that anatase and rutile type solid solution Ti 1-x V x O 2 films were obtained for x < 0.15 and x > 0.15 samples, respectively. Anatase and V 2 O 5 were found in x = 0.15 sample. Moreover, it was found that the crystallization of the film increased with increasing amount of vanadium. The electrical properties of Ti 1-x V x O 2 films were studied by measuring their resistance and Hall mobility. It was revealed that the resistivity of Ti 1-x V x O 2 films decreased with increasing x when the solid solution was formed, while the resistivity increased when the crystallization of vanadium oxide precipitated. The Hall constant was negative, indicating that Titanium-vanadium oxide is an n-type semiconductor. The evolution of the resistance and Hall mobility was ascribed to the 3d electrons of vanadium.


2016 ◽  
Vol 49 (36) ◽  
pp. 365001 ◽  
Author(s):  
H J Mao ◽  
C Song ◽  
B Cui ◽  
J J Peng ◽  
F Li ◽  
...  

2017 ◽  
Vol 898 ◽  
pp. 1935-1939 ◽  
Author(s):  
Yuan Song ◽  
Yuan Lin Zheng ◽  
Yu Fei Tang ◽  
Hai Bing Yang

Ceramic pigment is the key component of the ink color in the 3D printing process of ceramic products. The color performance and stability of ceramic pigments after calcination still need to be improved. In the present study the cobalt aluminate (CoAl2O4) ceramic pigment powders were fabricated by sol-gel method. The effects of fabrication processes on color properties of CoAl2O4 ceramic pigments were investigated. The compositions and morphologies of CoAl2O4 ceramic pigment powders were characterized. The stability of CoAl2O4 ceramic pigments was discussed. The results showed that the CoAl2O4 ceramic pigment with high chroma was obtained at calcination temperature of 1200°C and the Co/Al ratio is 1:3. The Zeta potential of the fabricated CoAl2O4 ceramic pigment powders in aqueous solution was-66.2 mV, which represented good dispersion stability. The chroma and saturation of the CoAl2O4 ceramic pigment increased owing to that the oxide solid solution in the spinel structure increased after being sintered at 1300 oC.


1991 ◽  
Vol 48 (3-4) ◽  
pp. 213-223 ◽  
Author(s):  
M SMAIHI ◽  
D PETIT ◽  
F GOURBILLEAU ◽  
F CHAPUT ◽  
J BOILOT

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