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.

引用

页数：11

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