Synthesis and Characterization of Doped Mesoporous TiO2 Materials

Chem. J. Chinese Universities

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Synthesis and Characterization of Doped Mesoporous TiO₂ Materials

SANG Li-Xia¹, MA Chong-Fang¹, SUN Ji-Hong², DAI Hong-Xing², WANG Feng¹, LI Jun¹

1. Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Mi
  nistry of Education, Key Laboratory of Heat Transfer and Energy Convers
  ion, Beijing Education Commission,
2. College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100022, China

Received:2005-09-05 Revised:1900-01-01 Online:2006-09-10 Published:2006-09-10
Contact: MA Chong-Fang

Abstract

Abstract:

Using non-surfacatant organic compounds triethanolamine as the template, TiO₂and Fe³⁺/V⁵⁺-TiO₂ mesoporous materials were synthesized by solgel and hydrothermal method. The properties of the samples were investigated by XRD, TEM, BET and UV-Vis DRS. The XRD patterns and TEM images confirm that pure TiO₂ have the wormhole-like mesoporous structure, which could be preserved by ethanol extraction and destroyed by calcination of template at 450 ℃. However, Fe³⁺/V⁵⁺-TiO₂ removed template by calcination has the mesoporous structure, which suggests that the mesoporous structure can be steadied by the doped ion. The appropriate molar fraction of the doped ion is 0.5%. BET studies show that the N₂ adsorption\|desorption isotherm plots of Fe³⁺/V⁵⁺-TiO₂ exhibit type IV isotherms, and specific surface areas about 103.59 and 90.80 m²/g, respectively. The average pore diameter of Fe³⁺/V⁵⁺-TiO₂ is about 10.5 and 9.6 nm, respectively. Based on the UV-Vis DRS, the gap adsorption edge in visible light region is revealed for the mesoporous Fe³⁺/V⁵⁺-TiO₂, rather than in ultraviolet region of the commercial photocatalyst P25. It is also illuminated that the Fe or V ions are incorporated into the lattice positions of the TiO₂ during the preparation.

Key words: TiO₂, Mesoporous materials, Triethanolamine, Doping

CLC Number:

O614

TrendMD:

SANG Li-Xia¹, MA Chong-Fang¹, SUN Ji-Hong², DAI Hong-Xing², WANG Feng¹, LI Jun¹. Synthesis and Characterization of Doped Mesoporous TiO₂ Materials[J]. Chem. J. Chinese Universities, doi: .

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Synthesis and Characterization of Doped Mesoporous TiO₂ Materials

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