期刊
WATER RESEARCH
卷 59, 期 -, 页码 207-218出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2014.04.025
关键词
Silver nanoparticles; Titanium dioxide; Anti-bacterial activity; Photocatalytic membrane reactor; Ceramic membrane
资金
- National Research Foundation (NRF), Singapore [EWI RFP 0802-11]
- Nanyang Technological University (NTU)
Ag-decorated TiO2 (Ag-TiO2) photocatalytic membranes have been fabricated by using Pluronic P-123 as a pore-forming and structure-directing agent. Six different hierarchical architectures were obtained by multilayer coating of different Ag-TiO2 sols. The porous structure of the resulting layers could be fine-tuned by altering the amounts of P-123 and AgNO3 added during the preparation of TiO2 sols. Physico-chemical and morphological properties of different Ag-TiO2 layers were thoroughly investigated. Ag nanoparticles were successfully incorporated into the TiO2 matrix. The Ag-TiO2 membranes possessed multi-functionality of membrane retention, Ag-enhanced TiO2 photocatalytic activity and antibacterial action. They were evaluated through experiments using a batch reactor and a photocatalytic membrane reactor (PMR). The best performing membrane was able to remove up to 1007 mg m(-2) h(-1) of Rhodamine B in the PMR. Two phenomena (photocatalytic degradation and adsorptive-membrane retention) that were responsible for the RhB removal were evaluated. In the batch reactor operated in dark, the membranes were able to remove greater than 5-logs of Escherichia coli. The membrane with the highest percentage of Ag incorporated was able to remove close to 7-logs of E. coli when operated in the PMR. (C) 2014 Elsevier Ltd. All rights reserved.
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