نتایج جستجو برای: zno stabilization
تعداد نتایج: 70882 فیلتر نتایج به سال:
A detailed understanding of the interactions among active components in gallium promoted Cu/ZnO catalysts, depending on speciation gallium, are reported using situ/operando spectroscopic studies, and their effect CO2 hydrogenation to methanol unraveled. In this contribution, promoting Ga3+-doped wurtzite ZnO lattice a Cu/ZnO/Ga2O3 catalyst is compared that zinc gallate (ZnGa2O4) phase. Remarkab...
Background and Objective: Styrene monomer is a volatile organic compound that is used in the various industries. Due to the hazardous effects of this chemical substance on the environment and humans, control and elimination of this vapour is necessary. Therefore, the aim of this study was to remove the styrene vapors from air flow using photocatalytic activity of zinc oxide immobilized on ZSM-5...
The time resolved UV-fluorescence in ZnO quantum dots has been investigated using femtosecond laser spectroscopy. The measurements were performed as a function of particle size for particles between 3 and 7 nm in diameter, which are in the quantum confined regime. A red shift in the fluorescence maximum is seen while increasing the particle size, which correlates with the shift in band gap due ...
Molecular models of 5 nm sized ZnO/Zn(OH)2 core-shell nanoparticles in ethanolic solution were derived as scale-up models (based on an earlier model created from ion-by-ion aggregation and self-organization) and subjected to mechanistic analyses of surface stabilization by block-copolymers. The latter comprise a poly-methacrylate chain accounting for strong surfactant association to the nanopar...
We study ion-irradiation-induced electrical isolation in n-type single-crystal ZnO epilayers. Emphasis is given to improving the thermal stability of isolation and obtaining a better understanding of the isolation mechanism. Results show that an increase in the dose of 2 MeV O ions ~up to ;2 orders of magnitude above the threshold isolation dose! and irradiation temperature ~up to 350 °C) has a...
When wurtzite ZnO is sliced perpendicular to the (0001) axis, two different polar surfaces, the (0001)-Zn and (0001̄)-O terminated surfaces, are formed. In a simple ionic picture, both surfaces are electrostatically unstable due to a diverging electrostatic energy. Although the ionic picture is an oversimplification, the surfaces adopt a modified surface structure to compensate for the polarity....
11:30 C8-02 Invited Understanding Stabilization Forces on ZnO Polar Surfaces Hu Xu, L. Dong, X. Q. Shi, M. A. Van Hove, W. K. Ho, N. Lin, H. S. Wu, S. Y. Tong Department of Physics, South University of Science and Technology of China; Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China; Institute of Computational and Theoretical Studies a...
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