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

光催化 材料科学 异质结 光降解 X射线光电子能谱 光致发光 化学工程 扫描电子显微镜 降级(电信) 可见光谱 复合数 高分辨率透射电子显微镜 复合材料 透射电子显微镜 催化作用 纳米技术 光电子学 化学 有机化学 工程类 电信 计算机科学
作者
Yuanyingxue Gao,Li Li,Wenlin Zu,Yingru Sun,Jiahui Guan,Yanzhen Cao,Yu Hou,Wenzhi Zhang
出处
期刊:Journal of Inorganic and Organometallic Polymers and Materials [Springer Science+Business Media]
卷期号:32 (5): 1840-1852 被引量:6
标识
DOI:10.1007/s10904-022-02242-y
摘要

In this study, a double Z-type Bi2MoO6/ZnSnO3/ZnO heterostructure photocatalyst was prepared by hydrothermal method to realize effective charge separation and improve photocatalytic activity. The synthesized samples were carefully examined by X-ray photoelectron spectroscopy, X-ray diffraction, scanning electron microscope, high-resolution transmission electron microscopy, 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 Bi2MoO6, ZnSnO3 and ZnO. Simultaneously, the dramatic changes in physical morphology, such as the specific surface area and particle size of the composites, led to a series of unique properties, such as a significant climb in light absorption properties and superior photocatalytic activity. In addition, compared to ZnO, Bi2MoO6 and ZnSnO3/ZnO, the Bi2MoO6/ZnSnO3/ZnO composite material shows lower PL intensity, smaller arc radius, and stronger photocurrent response. Meanwhile, Bi2MoO6/ZnSnO3/ZnO shows higher photocatalytic efficiency for CV and tetracycline hydrochloride (TC), and maintains good stability after 3 cycles of photodegradation experiments. Based on experimental results, the existence of heterojunctions between ZnO, ZnSnO3 and Bi2MoO6 and the possible photocatalytic mechanism for the degradation of CV by dual Z-scheme composites are proposed. In conclusion, this study provides a feasible strategy for the photocatalytic degradation of organic pollutants by introducing ZnSnO3 and Bi2MoO6 to successfully construct composite catalysts with dual Z-scheme heterostructures.
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