Photocatalytic Testing Protocol for N-Doped TiO2 Nanostructured Particles under Visible Light Irradiation Using the Statistical Taguchi Experimental Design

The primary objective of this research is to propose and compile a specific protocol for photocatalytic measurements modified TiO2 particles under visible-light irradiation. Nitrogen-modified titanium dioxide (N-TiO2) powder was synthesized by the sol–gel method characterized X-ray Diffraction Analysis (XRD), Field Emission Scanning Electron Microscopy (FESEM), Transmission (TEM), Photoelectron Spectroscopy (XPS), Raman (micro-Raman), Ultraviolet–visible (UV-Vis). Photocatalytic tests were performed on specially designed batch reactor test ability degrade hazardous toxic compounds. Via Taguchi method, nine experiments (L9) compiled examine factors that affect activity nano-sized powder. N-TiO2 dominance crystalline anatase phase, exhibiting crystals in nano-scale. control four selected parameters (pollutant selection among azo dyes, amount catalyst pollutant, distance cell from radiation source, time protocol) with three levels/options each. Conclusions drawn regarding way each parameter affects final degradation pollutant. proved pollutant greater extent choice followed catalyst. other two almost slightly process, similar percentage. Taking into account abovementioned results, testing nano-powder visible light irradiation proposed using batch, horizontal, rectangular, vis-LED equipped reflective walls.