7/8/13 Chemical Papers
www.chempap.org/?id=7&paper=818 1/1
VERSITA SPRINGER VERLAG INSTITUTE OF CHEMISTRY SLOVAK ACADEMY OF SCIENCES
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ISSN: 0366-6352 (print version) ISSN: 1336-9075 (electronic version) Springer's Journal No. 11696
Ag and Cu loaded on TiO2/graphite as a catalyst for
Escherichia coli
-contaminated water disinfection
Fitria Rahmawati, Triana Kusumaningsih, Anita M. Hapsari, and Aris Hastuti
Department of Chemistry, The Faculty of Mathematics and Natural Sciences, Sebelas Maret University, Jl. Ir. Sutami 36 A Kentingan, Surakarta, Indonesia
E-mail: [email protected]
Abstract: TiO2 film was synthesized by means of the chemical bath deposition (CBD) method from TiCl4 as a precursor and surfactant cetyl trimethyl ammonium bromide (CTAB) as a linking and assembling agent of the titanium hydroxide network on a graphite substrate. Ag and Cu were loaded on the TiO2 film by means of electrodeposition at various applied currents. Photoelectrochemical testing on the composite of Ag-TiO2/G and Cu-TiO2/G was used to define the composite for Escherichia coli-contaminated water disinfection. Disinfection efficiency and the rate of disinfection of E. coli-contaminated water with Ag-TiO2/G as a catalyst was higher than that observed for Cu-TiO2/G in all disinfection methods including photocatalysis (PC), electrocatalysis (EC), and photoelectrocatalysis (PEC). The highest rate constant was achieved by the PEC method using Ag-TiO2/G, k was 6.49 × 10−2 CFU mL−1 min−1. Effective disinfection times of 24 h (EDT24) and 48 h (EDT48) were achieved in all methods except the EC method using Cu-TiO2/G.
Keywords: Ag-TiO2/G - Cu-TiO2/G - Escherichia coli - disinfection Full paper is available at www.springerlink.com.
DOI: 10.2478/s11696-010-0036-4
Chemical Papers 64 (5) 557–565 (2010)
Monday, July 08, 2013
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