Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/59532
Title: TiO2 nanocomposite photocatalysts for water disinfection and decontamination under solar irradiation
Authors: Liu, Lei
Keywords: DRNTU::Engineering::Environmental engineering::Water treatment
Issue Date: 2014
Source: Liu, L. (2013). TiO2 nanocomposite photocatalysts for water disinfection and decontamination under solar irradiation. Doctoral thesis, Nanyang Technological University, Singapore.
Abstract: A group of novel TiO2 nanocomposite photocatalysts were developed by combining TiO2 nanofibers/nanorods with Ag nanoparticles, graphene oxide (GO) sheets, and visible light photocatalyst Ag3PO4. Generally these nanocomposite photocatalysts were highly efficient for disinfection of E.coli and decontamination of organic pollutants (i.e. methylene blue, AO 7, and phenol) under solar/visible light irradiation. Depositing Ag nanoparticles on electrospun TiO2 nanofibers could achieve concurrent membrane filtration and enhanced photocatalytic disinfection/decontamination activities under solar irradiation compared with TiO2 nanofibers and P25. The synergistic effects of coulping Ag nanoparticles, TiO2 nanorods and large GO sheets resulted in further improved photocatalytic activities of the GO-TiO2-Ag nanocomposites. Introduing visible light photocatalyst Ag3PO4 to form GO-Ag3PO4 nanocomposites achieved much higher photocatalytic activities compared with Ag/TiO2 or GO-TiO2-Ag nanocomposites. The mechanisms behind each were investigated to optimize the strategy of the processes. This study is of great significance in providing opportunities r cost effectively water purification applications.
URI: https://hdl.handle.net/10356/59532
DOI: 10.32657/10356/59532
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Theses

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