Synergistic introducing of oxygen vacancies and hybrid of organic semiconductor: Realizing deep structure modulation on Bi5O7I for high-efficiency photocatalytic pollutant oxidation
Synergistic introducing of oxygen vacancies and hybrid of organic semiconductor: Realizing deep structure modulation on Bi5O7I for high-efficiency photocatalytic pollutant oxidation
复制标题
氧空位协同引入与有机半导体杂化：实现Bi5O7I的深层结构调制高效光催化污染物氧化
DOI：
10.1016/j.apcatb.2019.118562
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发表时间：
2020-05-15
影响因子：
22.1
通讯作者：
Zhu, Yongfa
中科院分区：
文献类型：
--
作者：
Gao, Xiaoming;Gao, Kailong;Zhu, Yongfa
在醋酸诱导下，以面对面的形式，通过强的pi-pi堆积，成功地自组装了二茂铁酰亚胺(PDI)。保持了富铋Bi5O7I的结构。提出了冰醋酸诱导PdI超分子在Bi5O7I表面自组装的机理，并通过热力学计算证实了这一点。此外，在醇热过程中，Bi5O7I样品中存在多个氧空位。氧空位的引入提高了Bi5O7I的可见光捕获性能，改变了Bi5O7I的能带结构。在可见光照射下，Bi5O7I-OVS/PdI对有机污染物的光催化降解活性显著提高。活性的提高归功于富铋亚稳态Bi5O7I的高空穴氧化能力和氧空位的引入。本研究为PDI在富铋BixOyXz表面的自组装提供了一种方法，并为提高光催化活性提供了有效的策略。
Under inducing of acetic acid, Perylene imide (PDI) were successfully self-assembled through strong pi-pi stacking with the form of face-to-face. The structure of bismuth-rich Bi5O7I was maintained. A mechanism was proposed to illustrate the self-assembly of PDI supramolecules on the surface of Bi5O7I inducing by acetic acid, which was confirmed by the calculation of thermodynamics. Furthermore, there were multiple oxygen vacancies in the Bi5O7I samples during the alcohothermal process. The introduction of oxygen vacancies enhanced the performance of visible light-harvesting and changed the band structure of Bi5O7I. Under visible light irradiation, the photocatalytic activities of Bi5O7I-OVs/PDI for the degradation of organic pollutant were significantly improved. The improved activity was attributed to the high ability of holes oxidation of bismuth-rich metastable Bi5O7I and the introduction of oxygen vacancies. This study provided a method for PDI self-assembled on the surface of bismuth-rich BixOyXz and an effective strategy for improving photocatalytic activity.