期刊
NANOMATERIALS
卷 12, 期 22, 页码 -出版社
MDPI
DOI: 10.3390/nano12223970
关键词
one-step methodology; BiFeO3; g-C3N4; honeycomb-like morphology; Z-scheme heterojunction; ferroelectric
类别
资金
- Young Academic Leaders Project of North University of China [11045501]
- National Natural Science Foundation of China [62001431, 22002143]
- Shanxi Province Science Foundation for Youths [201901D211223]
In this study, honeycomb-like BiFeO3/g-C3N4 composites were synthesized using a facile method and showed high efficiency in degrading organic dyes under visible light illumination. The unique honeycomb morphology, charged molecule binding, and synergistic effect of Z-scheme heterojunction and ferroelectricity significantly enhanced the photocatalytic performance, which holds great potential for environmental purification.
In the present work, a facile one-step methodology was used to synthesize honeycomb-like BiFeO3/g-C3N4 composites, where the well-dispersed BiFeO3 strongly interacted with the hg-C3N4. The 10BiFeO(3)/hg-C3N4 could completely degrade RhB under visible light illumination within 60 min. The degradation rate constant was remarkably improved and approximately three times and seven times that of pristine hg-C3N4 and BiFeO3, respectively. This is ascribed to the following factors: (1) the unique honeycomb-like morphology facilitates the diffusion of the reactants and effectively improves the utilization of light energy by multiple reflections of light; (2) the charged dye molecules can be tightly bound to the spontaneous polarized BiFeO3 surface to form the Stern layer; (3) the Z-scheme heterojunction and the ferroelectric synergistically promoted the efficient separation and migration of the photogenerated charges. This method can synchronously tune the micro-nano structure, surface property, and internal field construction for g-C3N4-based photocatalysts, exhibiting outstanding potential in environmental purification.
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