Synthesis and visible-light photocatalytic degradation of Ag3PO4/AgBr/hydroxyapatite ternary nanocomposites prepared from oyster shells
| Autor: | Lei Zhang, Fanbing Zhang, Yuju Che, Haijun Liu, Cui Song, Sha Sha, Jingdi Chen |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Nanocomposite
Materials science General Chemical Engineering 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Catalysis Silver nitrate chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy Chemical engineering Photocatalysis Synergistic catalysis 0210 nano-technology Photodegradation Visible spectrum |
| Zdroj: | RSC Advances. 11:15598-15607 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/d1ra01007g |
| Popis: | In this paper, a new type of Ag3PO4/AgBr/hydroxyapatite (HAP) composite was successfully prepared from oyster shells and silver nitrate by a hydrothermal method. The samples were characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, electron spin resonance and other precision instruments, and their catalytic activity was characterized by visible light degradation of methylene blue (MB). The experimental results show that the Ag3PO4/AgBr/HAP photocatalyst has a nanoscale rod-like structure and excellent photodegradation performance. Although the content of Ag3PO4 or AgBr had a significant effect on the reaction activity, the effects did not all positively correlate, and only the appropriate ratio could produce an improved catalytic effect. The catalytic performance of the 1:1-Ag3PO4/AgBr/HAP composite was the best: complete degradation of MB was achieved within 40 min, and the reaction rate was 15 times that of Ag3PO4/AgBr. In the process of photocatalytic degradation, ˙O2− and h+ are the main active species involved in the reaction, and the synergistic catalysis of Ag3PO4, AgBr and HAP promotes the degradation rate. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|