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Sonochemical fabrication of mesoporous TiO2 inside diatom frustules for photocatalyst

Journal Article


Abstract


  • Mesoporous titanium dioxide (TiO2) has been assembled inside the macropores of diatom frustules by sonochemical condensation of titania precursor, and then thermal treated at an elevated temperature. The resulting hierarchical macro/mesoporous-structures of the TiO2 inside diatom were confirmed by characterizations of X-ray diffraction (XRD) and transmission electron microscopy (TEM). The amount of TiO2 inside the periodic macropores of diatom was controlled by varying the sonication time. It was found that the resultant composite with only 30 wt% TiO2 loading delivered a high photocatalytic performance, even better than that of pure P25. This is attributed to its hierarchical macro/mesoporous structure as it provides a large number of accessible active sites for efficient transportations of guest species to framework binding sites. Other macro/mesoporous structures with a nearly endless variety of functional chemistries and shapes are expected to be produced, leading to a range of novel applications in remediation, molecular transportation and environmental field by using this facile strategy.

Authors


  •   Mao, Lin (external author)
  •   Liu, Jia (external author)
  •   Zhu, Shenmin (external author)
  •   Zhang, Di (external author)
  •   Chen, Zhixin
  •   Chen, Chenxin (external author)

Publication Date


  • 2014

Citation


  • Mao, L., Liu, J., Zhu, S., Zhang, D., Chen, Z. & Chen, C. (2014). Sonochemical fabrication of mesoporous TiO2 inside diatom frustules for photocatalyst. Ultrasonics Sonochemistry, 21 (2), 527-534.

Scopus Eid


  • 2-s2.0-84888101790

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3156

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 527

End Page


  • 534

Volume


  • 21

Issue


  • 2

Place Of Publication


  • Netherlands

Abstract


  • Mesoporous titanium dioxide (TiO2) has been assembled inside the macropores of diatom frustules by sonochemical condensation of titania precursor, and then thermal treated at an elevated temperature. The resulting hierarchical macro/mesoporous-structures of the TiO2 inside diatom were confirmed by characterizations of X-ray diffraction (XRD) and transmission electron microscopy (TEM). The amount of TiO2 inside the periodic macropores of diatom was controlled by varying the sonication time. It was found that the resultant composite with only 30 wt% TiO2 loading delivered a high photocatalytic performance, even better than that of pure P25. This is attributed to its hierarchical macro/mesoporous structure as it provides a large number of accessible active sites for efficient transportations of guest species to framework binding sites. Other macro/mesoporous structures with a nearly endless variety of functional chemistries and shapes are expected to be produced, leading to a range of novel applications in remediation, molecular transportation and environmental field by using this facile strategy.

Authors


  •   Mao, Lin (external author)
  •   Liu, Jia (external author)
  •   Zhu, Shenmin (external author)
  •   Zhang, Di (external author)
  •   Chen, Zhixin
  •   Chen, Chenxin (external author)

Publication Date


  • 2014

Citation


  • Mao, L., Liu, J., Zhu, S., Zhang, D., Chen, Z. & Chen, C. (2014). Sonochemical fabrication of mesoporous TiO2 inside diatom frustules for photocatalyst. Ultrasonics Sonochemistry, 21 (2), 527-534.

Scopus Eid


  • 2-s2.0-84888101790

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3156

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 527

End Page


  • 534

Volume


  • 21

Issue


  • 2

Place Of Publication


  • Netherlands