Visible-light-driven photocatalysis of heterostructure Ag/Bi2WO6 nanocomposites and their photocatalytic degradation of dye under visible light irradiation

Abstract

Ag/Bi 2 WO 6 nanocomposites were successfully synthesized by a combination of hydrothermal method and ultrasonic vibration. The phases, vibration modes, constituents and morphologies were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, field emission scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. The visible-light-driven photocatalytic activitiy of 0-10 wt% Ag/Bi 2 WO 6 samples was studied by determining the photodegradation of rhodamine B under xenon lamp. In this research, 10 wt% Ag/Bi 2 WO 6 nanocomposites exhibit the highest efficiency and have the promising photocatalytic properties for waste water treatment.

Synthesis and Characterization of Heterostructure Pd/Bi2WO6 Nanocomposites with Enhanced Properties of Visible-Light-Driven Photocatalyst

“…The pattern can be indexed to the (200), ( 220) and (020) planes of orthorhombic Bi 2 WO 6 which is in good agreement with the XRD standard [19,20]. A set of diffraction spots was speci ed as the [001] zone axis of orthorhombic Bi 2 WO 6 .…”

“…A set of diffraction spots was speci ed as the [001] zone axis of orthorhombic Bi 2 WO 6 . Thus, the exposed facet of Bi 2 WO 6 nanoplate is (001) plane [19,20]. Figure 4c and [1,19,20].…”

“…, where k is the rst-order rate constant, C o is the initial concentration and C t is the concentration at a time (t) [1,3,11,13,14,17,20]. The photodegradation of RhB by Bi 2 WO 6 and Pd/Bi 2 WO 6 follows the pseudorst order kinetics (Fig.…”

“…11). Electrons were excited from valence band (VB) to conduction band (CB) while holes were induced in VB of Bi 2 WO 6 under visible light irradiation [1,9,11,14,19,20].…”

Photoinduced Synthesis of Hierarchical Flower-Like Ag/Bi2WO6 Microspheres as an Efficient Visible Light Photocatalyst

“…International Journal of Photoenergy photoreduction synthesis time was 20 min, which was 3.60 times higher than that of pure Bi 2 WO 6 . The photocatalytic results were compared with the already-present related literature; the reaction rate constant of Ag/Bi 2 WO 6 synthesized by sonochemical methods [22] or ultrasonic vibration processes [23] was 0.0332 or 0.0279 min −1 , respectively. The reaction rate constant of Pt/Bi 2 WO 6 [24] using the photoreduction process similar to our synthesis method was 0.035 min −1 .…”