Simultaneous Photocatalytic Reduction of Cr(VI) and Oxidation of Benzoic Acid in Aqueous N-F-Codoped TiO₂ Suspensions: Optimization and Modeling Using the Response Surface Methodology

Figure 1

Photocatalytic reduction of Cr(VI) in single and binary systems. ([Cr(VI)]₀ = 0.1 mM, [BA]₀ = 0.01 mM, pH = 2, N-F-TiO₂ = 500 mg L⁻¹).