Facile synthesis of deep eutectic solvent assisted BiOCl/BiVO4@AgNWs plasmonic photocatalysts under visible light enhanced catalytic performance

摘要

Noble metals are very well known for their surface plasmon resonance property that facilitate of better light absorption in the visible region particularly for gold and silver. Nevertheless, unlike semiconductors, noble metals are commonly considered lacking the ability to accelerate reactions by way of photogenerated electron-hole pairs due to their continuous energy band structure. Here, we report a one dimensional (1D) AgNWs combined with BiOCl/BiVO4 photocatalysts have been synthesized at room temperature. BiOCl/BiVO4 photocatalysts have been synthesized in the presence of deep eutectic solvents (DESs), also known as deep eutectic ionic liquids (DEILs). The synthesized product was characterized using various techniques. Surface morphology was analyzed using SEM and TEM, which shows a sheet like shaped structure from sol-gel method. The structural, optical properties were investigated by X-ray diffraction (XRD), UV-vis spectrophotometer, and Photoluminescence (PL) spectroscopy measurements. The BiOCl/BiVO4@AgNWs shows a better degradation of methylene blue (MB) and rhodamine B (RhB) than pure BiVO4 illuminated under a Xe arc lamp with 35 W and color temperature of 6000 K. Also, the significant enhancement of visible-light-driven photocatalytic activity should be ascribed to the formation of the BiOCl/BiVO4 heterojunction, which can result in the high separation and transfer efficiency of photogenerated charge carriers. It was verified by electrochemical impedance spectra (EIS) and linear sweep voltammetry (LSV).