Preparation of Dual Z-scheme Bi2MoO6/ZnSnO3/ZnO Heterostructure Photocatalyst for Efficient Visible Light Degradation of Organic Pollutants

Abstract

： An important means of achieving efficient charge separation and improving photocatalytic activity is the construction of heterostructures. In this study, the Bi 2 MoO 6 /ZnSnO 3 /ZnO heterostructure photocatalyst was synthesized by the hydrothermal method.The synthesized samples were carefully examined by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), scanning electron microscope (SEM), high-resolution transmission electron microscopy (HR-TEM), photoluminescence (PL), and other analytical techniques.Meanwhile, the photocatalytic performance was further evaluated by multi-mode photocatalytic degradation with crystal violet (CV). The results show that the composite material has a relatively homogeneous cubic structure in size and shape. In the cubic structure, a heterogeneous structure exists between Bi 2 MoO 6 , ZnSnO 3 and ZnO. Simultaneously, the dramatic changes in physical morphology, such as the specific surface area and particle size of the composites, led to a unique set of properties, such as a significant climb in light absorption properties and superior photocatalytic activity. In addition, the Bi 2 MoO 6 /ZnSnO 3 /ZnO composite material shows lower photoluminescence intensity, smaller arc radius, and stronger photocurrent response compared to

Facile preparation of BiOI/T-ZnOw p–n heterojunction photocatalysts with enhanced removal efficiency for rhodamine B and oxytetracycline

“…11 The tetrapod-like ZnO whiskers (T-ZnOw) are the only whiskers in the whisker family with a three-dimensional structure, which have high temperature resistance, semiconducting properties, and excellent mechanical properties, making them special for applications in functional materials. 12 To improve the photocatalytic activity of ZnO under visible light conditions, several modification techniques have been developed to expand the absorption wavelength from the ultraviolet region to the visible region, including dye-sensitization, construction of heterojunctions with other semiconductors, [13][14][15][16][17][18][19][20] and doping. [21][22][23] Among them, heterostructure engineering is considered as an effective strategy to construct high performance visible-lightresponsive photocatalysts.…”