Diethylene glycol-assisted organized TiO 2 nanostructures for photocatalytic wastewater treatment ceramic membranes

Rizwan Ahmad, Jin Kyu Kim, Jong Hak Kim, Jeonghwan Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A high-performance photocatalytic ceramic membrane was developed by direct growth of a TiO 2 structure on a macroporous alumina support using a hydrothermal method. The morphological nanostructure of TiO 2 on the support was successfully controlled via the interaction between the TiO 2 precursor and a capping agent, diethylene glycol (DEG). The growth of anatase TiO 2 nanorods was observed both on the membrane surface and pore walls. The well-organized nanorods TiO 2 reduced the perturbation of the alumina support, thus controlling the hydrolysis rate of the TiO 2 precursor and reducing membrane fouling. However, a decrease in the amount of the DEG capping agent significantly reduced membrane permeability, owing to the formation of nonporous clusters of TiO 2 on the support. Distribution of the organized TiO 2 nanorods on the support was very effective for the improvement of the organic removal efficiency and antifouling under ultraviolet illumination. The TiO 2 nanostructure associated with the reactive crystalline phase, rather than the amount of layered TiO 2 formed on the support, which was found to be the key to controlling photocatalytic membrane reactivity. These experimental findings would provide a new approach for the development of efficacious photocatalytic membranes with improved performance for wastewater treatment.

Original languageEnglish
Article number750
JournalWater (Switzerland)
Volume11
Issue number4
DOIs
Publication statusPublished - 2019 Apr 1

Fingerprint

nanorods
Ceramic membranes
nanomaterials
Nanostructures
ceramics
Ceramics
Waste Water
wastewater treatment
Wastewater treatment
aluminum oxide
Nanorods
membrane
Membranes
Nanotubes
Aluminum Oxide
permeability
performance
capping
membrane permeability
fouling

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Geography, Planning and Development
  • Aquatic Science
  • Water Science and Technology

Cite this

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abstract = "A high-performance photocatalytic ceramic membrane was developed by direct growth of a TiO 2 structure on a macroporous alumina support using a hydrothermal method. The morphological nanostructure of TiO 2 on the support was successfully controlled via the interaction between the TiO 2 precursor and a capping agent, diethylene glycol (DEG). The growth of anatase TiO 2 nanorods was observed both on the membrane surface and pore walls. The well-organized nanorods TiO 2 reduced the perturbation of the alumina support, thus controlling the hydrolysis rate of the TiO 2 precursor and reducing membrane fouling. However, a decrease in the amount of the DEG capping agent significantly reduced membrane permeability, owing to the formation of nonporous clusters of TiO 2 on the support. Distribution of the organized TiO 2 nanorods on the support was very effective for the improvement of the organic removal efficiency and antifouling under ultraviolet illumination. The TiO 2 nanostructure associated with the reactive crystalline phase, rather than the amount of layered TiO 2 formed on the support, which was found to be the key to controlling photocatalytic membrane reactivity. These experimental findings would provide a new approach for the development of efficacious photocatalytic membranes with improved performance for wastewater treatment.",
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Diethylene glycol-assisted organized TiO 2 nanostructures for photocatalytic wastewater treatment ceramic membranes . / Ahmad, Rizwan; Kim, Jin Kyu; Kim, Jong Hak; Kim, Jeonghwan.

In: Water (Switzerland), Vol. 11, No. 4, 750, 01.04.2019.

Research output: Contribution to journalArticle

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