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Ag and Cu loaded on TiO2/graphite as a catalyst for Escherichia coli-contaminated water disinfection

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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.

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Authors and Affiliations

  1. Department of Chemistry, The Faculty of Mathematics and Natural Sciences, Sebelas Maret University, Jl. Ir. Sutami 36 A Kentingan, Surakarta, Indonesia

    Fitria Rahmawati, Triana Kusumaningsih, Anita M. Hapsari & Aris Hastuti

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  1. Fitria Rahmawati
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  2. Triana Kusumaningsih
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  3. Anita M. Hapsari
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  4. Aris Hastuti
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Correspondence to Fitria Rahmawati.

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Rahmawati, F., Kusumaningsih, T., Hapsari, A.M. et al. Ag and Cu loaded on TiO2/graphite as a catalyst for Escherichia coli-contaminated water disinfection. Chem. Pap. 64, 557–565 (2010). https://doi.org/10.2478/s11696-010-0036-4

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  • DOI: https://doi.org/10.2478/s11696-010-0036-4

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