Journal
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
Volume 163, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2022.110588
Keywords
Graphitic carbon nitride; Oxygen doping; Sodium bismuth sulfide; Nanocomposite; Photocatalytic H2O2 production; Organic dyes degradation; Z-scheme heterojunction
Funding
- University of Tehran
- Kharazmi University
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This paper reports a green method for hydrogen peroxide production and organic pollutants removal using a two-dimensional nanocomposite. The results show that the prepared binary nanocomposite exhibits a high H2O2 production rate and degradation efficiency, and the Z-scheme-based charge-transfer dynamics effectively improve the photocatalytic performance.
The paper reports a green method for hydrogen peroxide (H2O2) production and organic pollutants removal to solve the related environmental exacerbation. Herein, a novel two-dimensional (2D) nanocomposite of oxygen-doped graphitic carbon nitride nanosheets with sodium bismuth sulfide nanoribbons was prepared through hydrothermal treatment. Z-scheme-based charge-transfer dynamics could remarkably boost the spatial charge separation to promote the activation of molecular oxygen for H2O2 production and organic dyes degradation. As prepared, binary nanocomposite exhibited an ultra-high H2O2 production rate of 8.92 mmol L-1 following the one-step two-electron direct pathway, about 2-times higher than pristine oxygen-doped graphitic carbon nitride (4.95 mmol L-1). It was found that the degradation rate over prepared binary nanocomposite was reached almost 95% with the first-order kinetics. Moreover, a possible mechanism for the superior photocatalytic activity and nanostructure formation process was suggested based on the experimental results. This work is expected to open an avenue for developing novel visible-light-driven materials through nanostructure design.
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