A high-performance and fouling resistant thin-film composite membrane prepared via coating TiO2 nanoparticles by sol-gel-derived spray method for PRO applications

Jungchan Kim, Dongwoo Suh, Choonsoo Kim, Youngbin Baek, Byeongho Lee, Hee Joong Kim, Jong Chan Lee, Jeyong Yoon

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Pressure retarded osmosis (PRO) is an attractive process for capturing renewable energy that requires high-performance and fouling-resistant membranes. Herein, we report a novel surface coating method that increases the water flux and organic fouling resistance of PRO membranes. The support layer of a commercial TFC was coated with TiO2 nanoparticles (TNPs) via a sol-gel-derived spray coating method. This TNP coating imparted hydrophilic properties and a negative charge to the membrane surface. A TNP-coated membrane (TNP1.0) showed a 25% increase in water flux and a 50% decrease in reverse salt flux. The flux reduction of the TNP membrane was 32% less than that of a commercial TFC membrane in the presence of humic acid foulants. This suggests that a high-performance and fouling-resistant PRO membrane can be prepared using a TiO2 sol-gel-derived spray coating method.

Original languageEnglish (US)
Pages (from-to)157-164
Number of pages8
JournalDesalination
Volume397
DOIs
StatePublished - Nov 1 2016

Keywords

  • Fouling resistance
  • Performance enhancement
  • Pressure retarded osmosis
  • Surface modification
  • TiO nanoparticle coating
  • TiO sol-gel-derived spray coating

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