Citation: Long-Long MA, Li-Bo QIN, Ya-Yang TIAN, Li QIN, Zhi YANG, Chao YANG. Preparation and visible-light photocatalytic properties of PO43- doped Bi2O2CO3/Bi0[J]. Chinese Journal of Inorganic Chemistry, ;2023, 39(1): 98-108. doi: 10.11862/CJIC.2022.281 shu

Preparation and visible-light photocatalytic properties of PO43- doped Bi2O2CO3/Bi0

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  • 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.
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