Journal
MATERIALS LETTERS
Volume 326, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2022.132992
Keywords
Oxygen vacancies; BiOCOOH; Bi-0; Tetracycline degradation; Nanocomposites; Porous materials
Funding
- Key Project of Science and Technology of Sichuan, China
- Opening Project of Key Laboratory of Process Equipment and Control Engineering of Sichuan Institute of High Education
- Talent Introduction Project of Sichuan University of Science and Engineering
- Opening Project of Key Laboratory of Cuisine discipline of Sichuan Institutes of High Education
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In this study, visible light responsive well-dispersed Bi-0/OVs-BiOCOOH hollow microspheres were prepared through a solvothermal method using colloidal carbon nanospheres (CSs) as sacrificial templates and reductants. The CSs played multiple roles in the synthesis of hollow Bi-0/OVs-BiOCOOH microspheres, and the hollow structure may have been caused by the redox reaction between CSs and BiO+ during synthesis. The SPR effect of Bi-0 enhanced the photocatalytic performance by promoting visible light absorption. Additionally, the introduction of oxygen vacancies (OVs) on the surface of BiOCOOH established defective energy levels, improving the photocatalytic capability by accelerating the separation of photogenerated carriers. The degradation performance of Bi-0/OVs-BiOCOOH for decontamination of tetracycline (TC) was 4.86 times that of BiOCOOH. Based on the observations, the photocatalytic mechanism of Bi-0/OVs-BiOCOOH for TC photodegradation was elaborated.
Herein, we prepared visible light responsive well-dispersed Bi-0/OVs-BiOCOOH hollow microspheres through solvothermal method employing colloid carbon nanospheres (CSs) as sacrificial template and reductant. The characterization results show that CSs play multiple roles in the synthesis of hollow Bi-0/OVs-BiOCOOH micro-spheres, in which the hollow structure may be caused by the redox reaction of CSs and BiO+ during synthesis. The SPR effect of Bi-0 can enrich the photocatalytic performance by promoting the absorption of visible light. Furthermore, a defective energy level can be established by introduction of oxygen vacancies (OVs) on the surface of BiOCOOH, improving photocatalytic capability by accelerating the separation of photogenerated carriers. The degradation performance of Bi-0/OVs-BiOCOOH for decontamination of tetracycline (TC) is 4.86 times than that of BiOCOOH. Based on the observations, the underlying photocatalytic mechanism of Bi-0/OVs-BiOCOOH for photodegradation of TC was elaborated.
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