TiO2 nanofiltration membranes prepared by molecular layer deposition for water purification

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

Research output: Contribution to journalArticlepeer-review

94 Scopus citations

Abstract

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
StatePublished - 15 Jul 2016

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V.

Keywords

  • Membranes
  • Molecular layer deposition
  • Nanofiltration
  • TiO

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