TiO2 nanofiltration membranes prepared by molecular layer deposition for water purification

Zhuonan Song, Mahdi Fathizadeh, Harvey Huang, Kyoung Hoon Chu, Yeomin Yoon, Lei Wang, Weiwei L. Xu, Miao Yu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

In this study, molecular layer deposition (MLD) was used as a novel and highly controllable method to prepare TiO2 nanofiltration membranes with approximately 1 nm pores for water purification. Number of deposition cycles and precursors (TiCl4 and ethylene glycol) were used to control membrane quality and final pore sizes, respectively. Optimized TiO2 nanofiltration membranes had a pure water permeability as high as ~48 L/(m2 h bar). Salt and dye rejection measurements showed moderate rejection of Na2SO4 (43%) and MgSO4 (35%) and high rejection of methylene blue (~96%). In addition, natural organic matter (NOM) removal testing showed high rejection (~99%) as well as significantly improved antifouling performance and recovery capability. MLD, as a new TiO2 nanofiltration membrane preparation technique, has great potential to realize excellent control of membrane composition, thickness, and potentially pore sizes in a scalable way.

Original languageEnglish
Pages (from-to)72-78
Number of pages7
JournalJournal of Membrane Science
Volume510
DOIs
Publication statusPublished - 15 Jul 2016
Externally publishedYes

Keywords / Materials (for Non-textual outputs)

  • Membranes
  • Molecular layer deposition
  • Nanofiltration
  • TiO

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