Ag and Cu loaded on ТiO_2/graphite as a catalystfor Escherichia coli-contaminated water disinfection

摘要

ТiO_2 film was synthesized by means of the chemical bath deposition (CBD) method from ТiСl_4 as a precursor and surfactant cetyl trimethyl ammonium bromide (СТАВ) as a linking and assem-bling agent of the titanium hydroxide network on a graphite substrate. Ag and Cu were loaded on the TiO_2 film by means of electrodeposition at various applied currents. Photoelectrochemical testing on the composite of Ag-TiO_2/G and Cu-TiO_2/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-TiO_2/G as a catalyst was higher than that observed for Сu-ТiO_2/G in all disinfection methods including photocatalysis (PC), electrocatalysis (EC), and photoelectrocatalysis (РЕС). The highest rate constant was achieved by the РЕС method using Ag-TiO_2/G, k was 6.49 x 10~(-2) CPU mL~(-1) min~(-1). Effective disinfection times of 24 h (EDT_(24)) and 48 h (EDT48) were achieved in all methods except the EC method using Сu-TiO_2/G.