Enhanced Photodegradation of Rhodamine B Using Visible-Light Sensitive N-TiO2/rGO Composite

Rhodamine B (RhB) is extensively used for dyeing purposes, and cannot be completely removed using traditional water treatment technologies. Here, we report the first time photodegradation of RhB nitrogen-doped titanium dioxide (N-TiO2) on reduced graphene oxide (rGO) composite (N-TiO2/rGO). The work primarily highlights synergistic effect incorporation N-TiO2 rGO its kinetic study RhB. N-TiO2/rGO was synthesized by dispersing titanium(IV) isopropoxide urea, followed annealing via hydrothermal method with rGO. Scanning electron microscopy (SEM) images illustrated that particles an irregular round shape white color were dispersed onto surface. X-Ray diffraction (XRD) patterns revealed showed anatase phase TiO2 a peak 2? = 25.622°. gas sorption analysis (GSA) had surface area, pore volume, size 53.393 m2/g, 0.096 cc/g, 3.588 nm, respectively. thermogravimetric-differential thermal (TG-DTA) appeared at temperature 200–500 °C, weight loss 2.50%. According to ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) study, TiO2, N-TiO2, band gap energies 3.25, 2.95, 2.86 eV, highest obtained optimum condition in pH 2 photocatalyst mass 20 mg irradiation 90 min. photocatalytic activity visible light higher percentage 78.29%, compared 44.08% under UV light. pseudo-second-order model.