Effect of Heat-Treated Temperature on Surface Crystal Structure and Catalytic Activity of ACF/ZnO Composite under Ultraviolet Irradiation and Ultrasonication

2010 ◽  
Vol 47 (2) ◽  
pp. 136-141
Author(s):  
Kan Zhang ◽  
Won-Chun Oh
Keyword(s):  
Crystal Structure ◽  
Catalytic Activity ◽  
Ultraviolet Irradiation ◽  
Heat Treated ◽  
Surface Crystal ◽  
Heat Treated Temperature

Sonocatalytic degradation of organic dyes and influence of Al2O3, Y2O3 and Fe2O3 on catalytic activity of TiO2 under ultrasonic irradiation

2011 ◽  
Vol 63 (7) ◽  
pp. 1513-1518
Author(s):  
Xia Chen ◽  
Renzheng Jiang ◽  
Jun Wang ◽  
Kai Li ◽  
Ying Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ultrasonic Irradiation ◽  
Organic Dyes ◽  
Irradiation Time ◽  
Mechanical Mixing ◽  
Ultrasonic Dispersion ◽  
Heat Treated ◽  
Degradation Ratio ◽  
Heat Treated Temperature ◽  
Solution Acidity

In order to improve the sonocatalytic activity of TiO2, Al2O3/TiO2, Y2O3/TiO2 and Fe2O3/TiO2 composites were prepared using mechanical mixing, liquid boiling, ultrasonic dispersion and heat-treated methods. And then, a series of degradation experiments were carried out under ultrasonic irradiation. Also, the influences of heat-treated temperature and heat-treated time on the sonocatalytic activity of Al2O3/TiO2, Y2O3/TiO2 and Fe2O3/TiO2, and ultrasonic irradiation time and solution acidity on the sonocatalytic degradation of Acid red B were investigated by UV-vis spectra. It was found that the degradation ratio showed significant increase in the order TiO2 < Fe2O3/TiO2 < Y2O3/TiO2 < Al2O3/TiO2. And the corresponding percentage degradations are about 37, 45, 52 and 81%, respectively. In addition, for exploring the universality, the degradation of other several organic dyes was also reviewed under the same conditions. Because of good degradation efficiency, this method may be an advisable choice for the treatment of non- or low-transparent wastewaters in the future.

scholarly journals Crystal structure of a complement factor D mutant expressing enhanced catalytic activity.

1995 ◽  
Vol 270 (52) ◽  
pp. 31414
Author(s):  
Sunghee Kim ◽  
Sthanam V.L. Narayana ◽  
John E. Volanakis
Keyword(s):  
Crystal Structure ◽  
Catalytic Activity ◽  
Complement Factor

CATALYTIC ACTIVITY OF HEAT-TREATED Co(II)-TETRAPHENYLPORPHYRIN FOR CATHODIC REDUCTION OF OXYGEN

1982 ◽  
Vol 11 (10) ◽  
pp. 1659-1662 ◽  
Author(s):  
Katsuaki Okabayashi ◽  
Osamu Ikeda ◽  
Hideo Tamura
Keyword(s):  
Catalytic Activity ◽  
Cathodic Reduction ◽  
Heat Treated

Synthesis, crystal structure and catalytic activity of some new chiral ansa-metallocenes of yttrium, lanthanum, samarium, lutetium and of zirconium

1999 ◽  
Vol 574 (2) ◽  
pp. 228-240 ◽  
Author(s):  
Herbert Schumann ◽  
Kerstin Zietzke ◽  
Roman Weimann ◽  
Jörg Demtschuk ◽  
Walter Kaminsky ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Catalytic Activity

IMPROVEMENT OF THE CHEMICAL COMPOSITION AND STRUCTURE OF CASTABLE NICKEL-BASED SUPERALLOY WITH LOW DENSITY. Part 2

2021 ◽  
pp. 3-15
Author(s):  
N.V. Petrushin ◽  
◽  
E.M. Visik ◽  
E.S. Elyutin ◽  
◽  
...  
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Turbine Blades ◽  
Experimental Studies ◽  
Single Crystal Structure ◽  
Term Strength ◽  
Nickel Based Superalloy ◽  
Heat Treated ◽  
Composition And Structure ◽  
Short Term Strength

Results of design and experimental studies of a nickel-based superalloy VZhL20 with a density of 8.04 g/cm3 for the manufacture of turbine blades with a columnar granular structure and a single-crystal structure are presented. It is shown that alloy VZHL20 with a single-crystal structure of the crystallographic orientation [001] in the heat-treated state possesses high phase stability, and enhanced short-term strength ( = 950 MPa, = 1130 MPa), and long-term strength ( = 340 MPa, = 185 MPa).

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