Synthesis of Z-type spherical B-g-C3N4/Bi2WO6 heterojunctions for enhanced rhodamine B degradation

被引：10
作者：
Zhao, Hong-jian [1 ]
Han, Zheng-bing [1 ]
Wu, Ren-Jang [2 ]
Ma, Fu [1 ]
Li, Xu [1 ]
Yu, Zhe [1 ]
Zhou, Yan [1 ]
机构：
[1] NingXia Normal Univ, Coll Chem & Chem Engn, Guyuan 756000, Peoples R China
[2] ProvidenceUniv, Dept Appl Chem, Taichung, Taiwan
来源：
OPTICAL MATERIALS | 2023年 / 142卷
关键词：
Direct Z-type heterojunction; Bi2WO6; Rhodamine B; GRAPHITIC CARBON NITRIDE; LIGHT PHOTOCATALYTIC ACTIVITY; CARRIER DIFFUSION LENGTH; Z-SCHEME SYSTEM; BI2WO6; G-C3N4; COMPOSITE; MECHANISM; DYE; NANOCOMPOSITE;
D O I：
10.1016/j.optmat.2023.114042
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A spherical B-g-C3N4/Bi2WO6 heterojunction photocatalyst was synthesized using the hydrothermal coprecipi-tation method. Scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), and ultraviolet-visible diffuse reflectance spectroscopy (DRS) showed that B-g-C3N4 was uniformly dispersed on the Bi2WO6 surface through a strong chemical bond, reducing the energy bandgap of Bi2WO6. The outcomes of the experiment regarding the photocatalytic degradation of rhodamine B (RhB) demonstrated a notable enhancement in the degradation rate for the 1:3 BCN/BWO com-posite. Specifically, the degradation rate was found to be 76 times greater than that of B-g-C3N4 and 7 times higher than that of Bi2WO6. Furthermore, a photocatalytic degradation mechanism was proposed based on the results of ultraviolet photoelectron spectroscopy (UPS) and free radical capture experiments. The direct Z-type B-g-C3N4/Bi2WO6 heterojunction structure promotes the effective separation of photogenerated carriers and en-hances their oxidation-reduction ability.
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页数：11
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