Thermal Stability of Gold Catalyst Supported on Mesoporous Titania Nanofibers

doi:10.1016/S1872-2067(11)60415-4

Abstract

Abstract: By deposition-precipitation with urea method, gold was loaded on mesoporous TiO₂ whisker, which was prepared from a potassium titanate whisker precursor through solid phase sintering process. The morphology and structure of these as-prepared catalysts were characterized by N₂ adsorption-desorption, X-ray diffraction, and transmission electron microscopy. The reduction of 4-nitrophenol to 4-aminophenol by NaBH₄ was evaluated as a probe reaction. After calcination at high temperature, the activity of the catalysts supported on mesoporous TiO₂ nanofiber was well maintained, and the particle size of gold nanoparticles was hardly changed. This might be attributed to the peculiar crystallographic structure and mesoporous nanoarchitecture of the mesoporous TiO₂ whisker.

Key words: nanogold, thermal stability, mesoporous titania, bicrystal, p-nitrophenol, reduction

MA Xuan-Xuan, ZHU Yin-Hua, LI Li-Cheng, WANG Chang-Song, LU Xiao-Hua, YANG Zhu-Hong. Thermal Stability of Gold Catalyst Supported on Mesoporous Titania Nanofibers[J]. Chinese Journal of Catalysis, 2012, 33(9): 1480-1485.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(11)60415-4

https://www.cjcatal.com/EN/Y2012/V33/I9/1480

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