Results 271 to 280 of about 75,402 (311)

CuOx/sulphated-ZrO2, in situ sulphated-CuOx/ZrO2, and CuSO4/ZrO2 as catalysts for the abatement of NO with C3H6 in the presence of excess O2

Applied Catalysis B: Environmental, 2002
Copper oxide supported on ZrO2 catalysts (CuOx/ZrO2) were prepared by impregnation of ZrO2 with aqueous solutions of Cu(NO3)2. Copper sulphated- zirconia catalysts were prepared by three different methods: (i) impregnation of ZrO2 with aqueous solutions of CuSO4, (ii) impregnation of sulphated-ZrO2 with toluene solutions of Cu(acetylacetonate)2, and ...
INDOVINA, Valerio, PIETROGIACOMI, Daniela, CAMPA, Maria Cristina   +2 more
openaire   +4 more sources

Sliding wear of Cr–Al2O3–ZrO2 and Mo–Al2O3–ZrO2 composites

Journal of the European Ceramic Society, 2005
The sliding wear behavior of a number of reactively sintered metal-alumina- composites (s-MAC) containing zirconia and pure alumina and yttria-stabilized zirconia (3Y-TZP) reference materials were investigated using a ball-on-disk method. Samples were tested against stainless steel (s/steel) and 3Y-TZP ball-sliders.
S Scheppokat, R Hannink, R Janssen, G de Portu, N Claussen   +4 more
openaire   +3 more sources

High-Efficiency Electromagnetic Wave Absorption of Cobalt-Decorated NH2-UIO-66-Derived Porous ZrO2/C.

ACS Applied Materials and Interfaces, 2019
Broadband absorbers derived from metal-organic frameworks are highly desirable in the electromagnetic (EM) wave absorption field. Herein, a strategy for cobalt-decorated porous ZrO2/C hybrid octahedrons by pyrolysis of Co(NO3)2-impregnated NH2-UIO-66 was
Xue Zhang, Jing Qiao, Jinbo Zhao, Dongmei Xu, Fenglong Wang, Chang Liu, Yanyan Jiang, Lili Wu, P. Cui, Longfei Lv, Qi Wang, Wei Liu, Zhou Wang, Jiurong Liu   +13 more
semanticscholar   +1 more source

ZrO2 Aerogels

2011
Mesoporous zirconia aerogels are very interesting materials with important properties used for several applications such as ceramics and catalysis. The textural and structural properties of zirconia aerogel depend on the preparation parameters such as the hydrolysis ratio, the acid and zirconium precursor concentrations, and the gel aging.
Lassaad Ben Hammouda, Imene Mejri, Mohamed Kadri Younes, Abdelhamid Ghorbel   +3 more
openaire   +1 more source

Effect of ZrO2 nanocrystals on the stabilization of the amorphous state of alumina and silica in the ZrO2-Al2O3 and ZrO2-SiO2 systems

Glass Physics and Chemistry, 2006
Structural and chemical transformations in the ZrO2-Al2O3 and ZrO2-SiO2 systems containing ZrO2 nanocrystals are examined. It is shown that the presence of zirconia nanoparticles in the oxide mixture retards the processes of crystallization and phase formation.
O. V. Almjasheva, V. V. Gusarov
openaire   +1 more source

Structural and Optical Characterization of ZrO2 and Y2O3-ZrO2 Nanopowders

2015
Structural and optical properties of pure and Y-doped ZrO2 nanopowders with different Y content sintered by co-precipitation of Zr and Y nitrates were investigated. It was observed that the increase of Y content stimulates the transformation of crystalline phase from monoclinic through tetragonal to cubic while the increase of calcinations time leads ...
Nadiia Korsunska, Anton Zhuk, Vasyl Papusha, Oleksandr Kolomys, Yuliya Polishchuk, Yurii Bacherikov, Viktor Strelchuk, Vasyl Kladko, Tetyana Konstantinova, Tetyana Kryshtab, Larysa Khomenkova   +10 more
openaire   +1 more source

Template-free synthesis of tetragonal Co-doped ZrO2 nanoparticles for applications in electrochemical energy storage and water treatment

Electrochimica Acta, 2019
Template-free synthesis of pure and Co-doped ZrO2 tetragonal structured nanoparticles was achieved by the hydrothermal method and their photocatalytic, photoelectrocatalytic, and electrochemical energy storage supercapacitive properties were investigated
C. Reddy, I. N. Reddy, K. R. Reddy, Shim Jaesool, K. Yoo   +4 more
semanticscholar   +1 more source

Supported oxides: Preparation, characterization and catalytic activity of CrOx/ZrO2, MoOx/ZrO2 and VOx/ZrO2

Catalysis Today, 1998
Abstract In the paper, we review the preparation and the characterization of CrOx/ZrO2, MoOx/ZrO2 and VOx/ZrO2. Catalysts were prepared by various methods (equilibrium adsorption, impregnation or mechanical mixing) and characterized by XRD, XPS, ESR and FTIR techniques. In the paper, we also review the catalytic activity of the ZrO2 supported systems
openaire   +1 more source

Phase tuning of ZrO2 supported cobalt catalysts for hydrodeoxygenation of 5-hydroxymethylfurfural to 2,5-dimethylfuran under mild conditions

, 2021
Tianci Xiao, Xiaohao Liu, Guangyue Xu, Ying Zhang   +3 more
semanticscholar   +1 more source

?????????? ZrO2-???????????????? ?? ???????????? ??????????????????-???????????????????? ???????????????? ?????????? ????????????

2009
?????????????????????? ???????????????????? ZrO2-???????????????? ????????????-?????????????????? ???????????????????? (Ni???40,5% (????.) Nb, ???????????????????? ?????? 1175????)) ?? ?????????????????????????? ??????????????????????. ?????????????? ???????? ???????????????????? ???????????????????? 80??. ?????????????????? ?????? ?????????? ZrO2-?????
openaire   +1 more source