Enhanced visible ‐light‐driven photocatalytic activity of F doped reduced graphene oxide ‐ Bi2WO6 photocatalyst

F ‐rGO‐BWOphotocatalysts leading to improving the photocatalytic properties. The reduced graphene oxide ‐Bi2WO6 (rGO ‐BWO) photocatalysts with the different RF/O values (molar ratio of the F molar mass and the O's molar mass of Bi2WO6) had been successfully synthesized via one ‐step hydrothermal method. The F‐doped rGO‐BWO samples were characterized by X‐ray diffraction patterns (XRD), field‐emission scanning electron microscopy (FE‐ESEM), transmission electron microscopy (TEM), Brunauer–Emmett–Teller surface area (BET), X‐ray photoelectron spectroscopy (XPS) and UV–vis diffuse reflectance spectra (DRS). The results indicate that F− ions had been successfully doped into rGO ‐BWO samples. With the increasing of the RF/O values from 0 to 2%, the evident change of the morphology and the absorption edges of F ‐doped rGO‐BWO samples and the photocatalytic activities had been enhanced. Moreover, the photocatalytic activity of F‐doped rGO‐BWO with RF/O = 0.05 were better than rGO‐BWO and the other F‐doped rGO‐BWO under 500 W Xe lamp light irradiation. The enhanced photocatalytic activity can be attributed to the morphology of the intact microsphere that signify the bigger specific surface area for providing more possible reaction sites f or the adsorption–desorption equilibrium of photocatalytic reaction, the introduction of F− ions that may cause the enhancement of surface acidity and creation of oxygen vacancies under visible li...

Source: Applied Organometallic Chemistry - November 13, 2018 Category: Chemistry Authors: Hongguang Yu, Chenglin Chu, Xulong An Tags: FULL PAPER Source Type: research