| PO43-掺杂Bi2O2CO3/Bi0的制备及其可见光催化性能 | |
| Preparation and visible-light photocatalytic properties of PO43- doped Bi2O2CO3/Bi0 | |
| 摘要: 构建氧空位以及附着金属单质Bi (Bi0)是增强半导体材料光吸收性能、促进半导体光生载流子分离的有效方法。通过简单的共沉淀法及氢气热还原成功制备了PO43-掺杂Bi2O2CO3附着Bi0(Bi-P-BOC)的可见光催化剂，并对其在可见光下催化降解氧氟沙星(OFX)的性能及机理进行了研究。材料表征结果表明BOC随着PO43-的均匀掺杂，可见光吸收能力增强，表面缺陷增多，比表面积增大。而随着氢气热还原，BOC表面形成Bi0的同时也原位构建了大量的氧空位。可见光催化性能测试表明，Bi-P-BOC可以在180 min内降解约85%的OFX，降解速率为0.013 0 min-1，是BOC降解速率的8倍。Bi-P-BOC光催化降解机理表明其具有更好的可见光吸收能力，Bi0以及氧空位的存在促进了光生载流子的分离，h+是其光催化降解过程中的主要的活性氧物种(ROS)，此外，1O2和·O2-也对降解有一定贡献。 | |
| 关键词: PO43-掺杂Bi2O2CO3 金属Bi 氧空位 可见光催化 氧氟沙星 | |
| 基金项目: 山西省应用基础研究计划(No.201901D211464)、 山西省高等学校科技创新项目(No.2021L520， 2021L521， 2021L522， 2021L531)、 湖北省科技学院博士启动基金项目(No.BK202305)资助。 | |
| Abstract: Oxygen vacancies construction and metallic Bi0 loading were proven effective ways for enhancing the light absorption performance of semiconductor materials and promoting the separation of photogenerated carriers. In this work, metal Bi (Bi0) decorated PO43- doped Bi2O2CO3 (BOC) nanocomposites (Bi-P-BOC) was successfully prepared through a simple co-precipitation method with a subsequent thermal reduction process, and its photocatalytic degradation mechanism of ofloxacin (OFX) under visible light irradiation was studied. The result demonstrated that PO43- was uniformly doped in BOC, which showed increased visible light response range, increased surface defects, and enlarged specific surface area. Through the thermal reduction process, a number of oxygen vacancies were produced as well as the loading of Bi0 on the surface of BOC. Bi-P-BOC was able to degrade 85% of the OFX in 180 min under visible light with a degradation rate of 0.013 0 min-1, which was about eight times than pristine BOC and about two times than P-BOC-6. The UV-visible diffuse reflectance spectroscopy spectrum showed the enhanced visible light absorption attribute to the surface plasmon resonance effect of Bi0. The improved separation of the photoinduced electron and hole pairs were confirmed by the photoluminescence spectrum. Thus, the enhanced photocatalysis performance of Bi-P-BOC may mainly be benefited from its increased visible light response range and improved separation of the photoinduced electron and hole pairs. Furthermore, h+ was detected to be the main reactive oxygen species (ROS) species for the degradation of OFX in this system, 1O2 and ·O2- also made contributions to the degradation. | |
| Keywords: PO43- doped Bi2O2CO3 Bi0 oxygen vacancies visible-light photocatalysis ofloxacin | |
| 投稿时间：2022-07-07 修订日期：2022-10-18 | |
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| 马珑珑,秦立波,田亚洋,秦鹂,杨志,杨超.PO43-掺杂Bi2O2CO3/Bi0的制备及其可见光催化性能[J].无机化学学报,2023,39(1):98-108. | |
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