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Your search keyword '"LIU, Xiao-hong"' showing total 26 results
Start Over Author "LIU, Xiao-hong" Journal advanced materials research
26 results on '"LIU, Xiao-hong"'

25. Synthesis, Characterization and Photocatalytic Activity of Nb-Doped TiO2 Nanoparticles

Author

Li, Xuan Dong, Han, Xi Jiang, Wang, Wen Ying, Liu, Xiao Hong, Wang, Yan, and Liu, Xin Rong

Abstract

Nb-doped TiO2 powders with different concentrations of Nb have been synthesized by a sol-gel method and characterized by a series of technologies including X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and UV-vis spectroscopy. The photocatalytic activity of Nb-doped TiO2 is evaluated by degradation efficiency of methyl orange in aqueous solution. The results indicate that the photocatalytic activity of Nb-doped TiO2 synthesized with a Nb/Ti molar ratio of 5% is higher than that of TiO2 under the visible light.

Published
2012
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26. Preparation of A14SiC4 by Solid-State Reaction

Author

Liu, Xiao Hong, Wang, Hui, Zeng, Ling Ke, and Deng, Cheng Ji

Abstract

In this paper, A14SiC4 was synthesized by using flint, aluminum and carbon black as raw materials，and they mass ratio was 28:50:22. The samples were fired at 1500℃、1600℃ and 1700℃ in an argon atmosphere. The phase compositions were determined by X-ray diffraction (XRD), the microstructures were examined by scanning electron microscope (SEM) and the elemental and quantitative compositions were determined by the energy dispersive X-ray spectroscopy (EDX). The results showed that the flint reacted with the carbon black, and produced Al2O3 and SiC firstly; meanwhile Al4C3 as intermediate product formed by the reaction between Al and C. Then a certain Al4C3 reacted with SiC, and produced A14SiC4; most Al4C3 reacted with the Al2O3, and produced Al4O4C at higher temperature. Subsequently, the Al4O4C and the SiC reacted with carbon black, and produced A14SiC4. The formed quantity of A14SiC4 increased as the heating temperature was raised, and crystal structure was the flake structure of 1-2μm thickness and about 10μm length. The formation mechanism of A14SiC4 was also discussed.

Published
2011
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