Photodegradation of Rhodamine B in Presence of CaO and NiO-CaO Catalysts

Table 1

Zeta potentials of aqueous suspensions of the catalysts.

Catalyst	Zeta potential [mV]	pH value of suspension
CaO-2	+12.4	12.7
NiO-CaO	+24.7	12.7
TiO2	−9.1	7.0