Facile synthesis of hierarchically meso/nanoporous s- and c-codoped TiO2 and its high photocatalytic efficiency in H2 generation

Hongwei Bai, Keith Shan Yao Kwan, Zhaoyang Liu, Xiaoxiao Song, Siew Siang Lee, Darren Delai Sun

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Here, hierarchically meso/nanoporous TiO2 was successfully fabricated by a facile and efficient hydrolysis and calcination method using Ti(OC4H9)4 and K2S2O8 as precursors. The hydrosol was firstly prepared by drop-wise adding ethanol dissolved Ti(OC4H9)4 solution into acetone dissolved K2S2O8 solution under a vigorous stirring and heating condition. After being sufficiently hydrolyzed, the hydrosol was calcined to promote the crystallization of TiO2 and successfully dope S and C on TiO2. The calcination temperature significantly affects the doping of S and C on TiO2, crystallization of TiO2, formation of hierarchically meso/nanoporous structure of TiO2 and its light absorption capability. The S- and C-codoped TiO2 exhibits high photocatalytic H2 generation efficiency in a water/methanol sacrificial reagent system under the irradiation of UV light. The high photocatalytic efficiency is dependent on the comprehensively competing effects of the codoping of S and C, crystallization, specific surface area and light absorption capability. The S- and C-codoped TiO2 calcined at 600°C demonstrates the highest photocatalytic H2 generation efficiency, which is ascribed to the balanced synergy of the abovementioned factors.

Original languageEnglish
Pages (from-to)294-300
Number of pages7
JournalApplied Catalysis B: Environmental
Volume129
DOIs
Publication statusPublished - 7 Jan 2013
Externally publishedYes

Fingerprint

Crystallization
crystallization
Sand
Calcination
Light absorption
sand
Acetone
acetone
Specific surface area
Ultraviolet radiation
Methanol
methanol
ethanol
hydrolysis
Hydrolysis
irradiation
Ethanol
surface area
Doping (additives)
Irradiation

Keywords

  • H generation
  • Hierarchically meso/nanoporous structure
  • Photocatalysis
  • S- and C-codoped TiO

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Environmental Science(all)

Cite this

Facile synthesis of hierarchically meso/nanoporous s- and c-codoped TiO2 and its high photocatalytic efficiency in H2 generation. / Bai, Hongwei; Kwan, Keith Shan Yao; Liu, Zhaoyang; Song, Xiaoxiao; Lee, Siew Siang; Sun, Darren Delai.

In: Applied Catalysis B: Environmental, Vol. 129, 07.01.2013, p. 294-300.

Research output: Contribution to journalArticle

Bai, Hongwei ; Kwan, Keith Shan Yao ; Liu, Zhaoyang ; Song, Xiaoxiao ; Lee, Siew Siang ; Sun, Darren Delai. / Facile synthesis of hierarchically meso/nanoporous s- and c-codoped TiO2 and its high photocatalytic efficiency in H2 generation. In: Applied Catalysis B: Environmental. 2013 ; Vol. 129. pp. 294-300.
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