Direct electrospinning preparation of Z-scheme mixed-crystal Bi2O3/g-C3N4 composite photocatalysts with enhanced visible-light photocatalytic activity
| Autor: | Jiansong Sheng, Hui Yang, Feilong Huang, Changteng Zhang, Qianhong Shen, SuHua Zheng, Liruhua Zhang, LiXin Yu |
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| Rok vydání: | 2021 |
| Předmět: |
Chemistry
Composite number 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis Electrospinning 0104 chemical sciences Absorbance Chemical engineering Nanofiber Materials Chemistry Photocatalysis Irradiation 0210 nano-technology Photodegradation Reusability |
| Zdroj: | New Journal of Chemistry. 45:14522-14531 |
| ISSN: | 1369-9261 1144-0546 |
| Popis: | A novel Z-scheme mixed-crystal Bi2O3/g-C3N4 composite photocatalyst was successfully prepared by a simple electrospinning–calcination approach. The micromorphology, configuration, chemical interaction and optical properties of the synthesized composite photocatalyst were analyzed and the photocatalytic degradation efficiency was estimated by the photodegradation of antibiotics. The results show that Bi2O3 nanofibers existing as α and β mixed-crystal phases are prepared and mixed with g-C3N4 nanosheets, thus forming a highly efficient α-Bi2O3/β-Bi2O3/g-C3N4 homoheterojunction. Transfer of the photogenerated electrons and holes in the fabricated α-Bi2O3/β-Bi2O3/g-C3N4 homoheterojunction follows a Z-scheme enhanced photocatalytic mechanism, resulting in the effective separation and transfer of photogenerated e− and h+. Moreover, the mixed-crystal Bi2O3/g-C3N4 photocatalyst has an enhanced visible-light absorbance. Therefore, the Bi2O3/g-C3N4 composite displays high photocatalytic properties for degrading tetracycline hydrochloride under 5 W LED visible-light irradiation, and the high photocatalytic activity is maintained even after 5 cycles, indicating the outstanding stability and reusability of the composite photocatalyst. |
| Databáze: | OpenAIRE |
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