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Your search keyword '"Hong, Mengqing"' showing total 31 results
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31 results on '"Hong, Mengqing"'

30. Template and Silica Interlayer Tailorable Synthesis of Spindle-like Multilayer α-Fe2O3/Ag/SnO2Ternary Hybrid Architectures and Their Enhanced Photocatalytic Activity

Author

Sun, Lingling, Wu, Wei, Yang, Shuanglei, Zhou, Juan, Hong, Mengqing, Xiao, Xiangheng, Ren, Feng, and Jiang, Changzhong

Abstract

Our study reports a novel iron oxide/noble metal/semiconductor ternary multilayer hybrid structure that was synthesized through template synthesis and layer-by-layer deposition. Three different morphologies of α-Fe2O3/Ag/SiO2/SnO2hybrid architectures were obtained with different thicknesses of the SiO2interlayer which was introduced for tailoring and controlling the coupling of noble metal Ag nanoparticles (NPs) with the SnO2semiconductor. The resulting samples were characterized in terms of morphology, composition, and optical property by various analytical techniques. The as-obtained α-Fe2O3/Ag/SiO2/SnO2nanocomposites exhibit enhanced visible light or UV photocatalytic abilities, remarkably superior to commercial pure SnO2products, bare α-Fe2O3seeds, and α-Fe2O3/SnO2nanocomposites. Moreover, the sample of α-Fe2O3/Ag/SiO2/SnO2also exhibits good chemical stability and recyclability because it has higher photocatalytic activity even after eight cycles. The origin of enhanced photocatalytic activity on the multilayer core–shell α-Fe2O3/Ag/SiO2/SnO2nanocomposites was primarily ascribed to the coupling between noble metal Ag and the two semiconductors Fe2O3and SnO2, which are proven to be applied in recyclable photocatalysis.

Published
2014
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31. Energy dependence on formation of TiO2 nanofilms by Ti ion implantation and annealing.

Author

Liu, Yichao, Ren, Feng, Cai, Guangxu, Zhou, Xiaodong, Hong, Mengqing, Li, Wenqing, Xiao, Xiangheng, Wu, Wei, and Jiang, Changzhong

Subjects
*TITANIUM dioxide, *ENERGY security, *NANOFILMS, *METAL ions, *ION implantation, *ANNEALING of metals, *PHOTOCATALYSIS kinetics, *ION energy
Abstract

Highlights: [•] Fabrication of TiO2 films by ion implantation and annealing strongly depends on ion energy. [•] Best photocatalytic activity is achieved in the TiO2 nanofilm annealed at 1000°C. [•] Phase transformation of TiO2 appears under annealing temperature of 900°C. [ABSTRACT FROM AUTHOR]

Published
2014
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