Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 624, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2021.126783
Keywords
BiVO4; Polypyrrole; Tetracycline; Graphitic carbon nitride; Electron transfer channel; Photocalysis
Categories
Funding
- Fundamental Research Funds for the Central Universities [2232021G-04]
- Graduate Student Innovation Fund of Donghua University [GSIF-DH-M2021003]
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This study successfully designed a new ternary nanocomposite with promising photocatalytic degradation effect on water pollution induced by the abuse of antibiotics, showing great potential for environmental purification and solar fuel generation.
The photocatalytic degradation under mild conditions is considered as a promising solution for water pollution induced by the abuse of antibiotics. Herein, a new nanocomposite constructed (3D/2D) BiVO4@Polypyrrole/g-C3N4 ternary composites with Z-scheme was successfully proposed. The result of photocatalytic performance evaluation indicated that BiVO4@Polypyrrole/g-C3N4 (5 wt%) exhibited outstanding photocatalytic activity compared with g-C3N4 and BiVO4, even under different water quality and ion doping conditions, and the degradation efficiency of tetracycline (TC) can reach 90% within 120 min. The cycle test proved that the prepared composite catalyst has good stability and reusability. DRS, PL and other characterization results illustrated that the improvement of catalytic performance was attributed to electron transfer channel between (3D) BiVO4@PPy and (2D) g-C3N4, which can effectively separate photon-generated carriers. The possible mechanism based on Z-scheme heterojunction was proposed considering the free radical capture, Mott-Schottky, LC-MS and ESR. The present work serves as a principal route to design and extend striking step-scheme g-C3N4-based nanocomposites with promising environmental purification and solar fuel generation usage.
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