High-Efficiently Photoelectrochemical Hydrogen Production over Zn-Incorporated TiO₂ Nanotubes

Table 2

Zeta-potential values and aggregated diameter sizes for 0.01 mol% Zn-TNT according to pH, as determined by ELS.

	Zeta potential (mV)	ELS diameter (nm)
pH=3	9.28	3641.8
pH=5	2.87	8385.4
pH=7	−21.41	709.2
pH=9	−18.44	687.5
pH=11	−18.81	664.5