Photocatalytic Degradation of Polynitrophenols on Various Commercial Suspended or Deposited Titania Catalysts Using Artificial and Solar Light

Table 1

Physicochemical characteristics of polynitrophenols.

Compound	Mw (g/mol)	𝜆max (nm)	𝜀 (L⋅mg^−1⋅cm^−1)	pKa	pH
Phenol	94.11	270	0.0153	9.20	6.7
4-nitrophenol (PNP)	139.11	317	0.0623	7.16	5.8
2,4-dinitrophenol (DNP)	184.11	260	0.0560	4.00	5.3
2,4,6-trinitrophenol (TNP)	229.11	356	0.0461	0.80	4.0