TiO_𝟐 Photocatalysis of the Organophosphorus Fenamiphos: Insight into the Degradation Mechanism

Table 1

The effect of oxygen concentration, isopropanol, and humic substance (HS) on the photocatalytic disappearance of fenamiphos, [FN] = 3.0 × 10⁻⁵ mol L⁻¹, TiO₂: 1.0 g L⁻¹, 𝜆_excitation = 365 nm.

Conditions	𝑘, min^−1	Conditions	𝑘, min^−1
Aerated	7.4 × 10^−2	HS 0.2%	8.5 × 10^−2
Deaerated	0.02 × 10^−2	HS 1%	5.5 × 10^−2
Oxygenated	23.0 × 10^−2	HS 2%	2.5 × 10^−2
Isopropanol 0.1%	No disappearance