Designing all-solid-state Z-Scheme 2D g-C3N4/Bi2WO6 for improved photocatalysis and photocatalytic mechanism insight

作者：Mao, Mao; Zhao, Shuowei; Chen, Zhigang; She, Xiaojie; Yi, Jianjian; Xia, Kaixiang; Xu, Hui; He, Minqiang^*; Li, Huaming^*

来源：Green Energy & Environment, 2018, 3(3): 229-238.

DOI：10.1016/j.gee.2017.11.001

• All-solid-state
• Z-Scheme photocatalyst
• 2D g-C3N4
• Bi2WO6
• Photocatalysis

Bi2WO6 was modified by two-dimensional g-C3N4 (2D g-C3N4) via a hydrothermal method. The structure, morphology, optical and electronic properties were investigated by multiple techniques, including X-ray diffraction (XRD), X-ray photoelectron spectroscopy spectra (XPS), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Ultravioletvisible diffuse reflection spectroscopy (DRS), photocurrent and electrochemical impedance spectroscopy (EIS), electron spin resonance (ESR), respectively. Rhodamine B (RhB) was used as the target organic pollutant to research the photocatalytic performance of as-prepared composites. The Bi2WO6/2D g-C3N4 exhibited a remarkable improvement compared with the pure Bi2WO6. The enhanced photocatalytic activity was because the photogenerated electrons and holes can quickly separate by Z-Scheme passageway in composites. The photocatalytic mechanism was also researched in detail through ESR analysis.

• 出版日期2018-7
• 单位江苏大学