Influencing Parameters in the Photocatalytic Degradation of Organic Effluent via Nanometal Oxide Catalyst: A Review

Table 8

Optimum pH for the different photocatalytic system.

Light source	Catalyst preparation method	Initial concentration	Catalyst used	Organic pollutant	Optimum pH	Irradiation time (min)	Degradation efficiency	Reference
UV light	Hydrothermal process	2000 mg/lit (COD)	TiO2	Coking water	7	60	30%	[59]
100 W mercury lamp	Sol-gel method	50 ppm	Codoped TiO2	2-Chlorophenol	12	180	95%	[48]
UV light	Degussa P25	1.2 × 10^−4 M	TiO2 and cement	Reactive yellow dye 17	5–7	480	85	[60]
40 W fluorescent lamp	Aqueous reaction method	6 × 10^−6 M	MnWO4	Methyl orange	9	480	50	[41]