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Effect of phosphate ions on the size distribution and ζ-potential of TiO2 samples. Left panels: ζ-potentials vs. pH, expressed as mean value of three independent measurements ± SD. Right panels: Size distribution monitored by DLS. (A,B) TiO2-FG; (C,D) TiO2-NM1; (E,F) TiO2-NM2.
