异质结
光催化
材料科学
光降解
可见光谱
光电子学
铁电性
载流子
化学工程
纳米技术
化学
催化作用
有机化学
工程类
电介质
作者
Tong Liu,Yongjin Li,Zhiyuan Cheng,Yan Peng,Menghan Shen,Shenghong Yang,Yueli Zhang
标识
DOI:10.1016/j.apsusc.2021.149507
摘要
Spontaneous polarization of ferroelectric is used to promote the separation of photogenerated electrons and holes, showing tremendous potentials of solar-light driven photocatalytic. However, designing a system of efficient response to visible light, remains a fundamental challenge due to rapid recombination of electrons-holes and weak absorption in visible region. Here, we synthetized Bi4Ti3O12/BiOI heterojunction, which BiOI nanosheets selectively deposited on (1 1 0) facets of Bi4Ti3O12 by epitaxy growth. The synthetized heterojunction is characterized by phase structures, morphology, and surface chemical state. The results of ferroelectric phase curve illustrate that the construction of heterojunction enhances the ferroelectric properties, which is favorable to improve the separation and recombination processes of carriers. Furthermore, the sample Bi4Ti3O12/BiOI-3 reveals better photocatalytic kinetics in photodegradation of bisphenol A (BPA) under visible-light irradiation, which is about 74.16 and 1.83 times faster than that of pure Bi4Ti3O12 and BiOI. This work provides an effective and scalable strategy for designing a system of efficient response to visible light.
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