| 초록 |
In recent years, graphitic carbon nitride (g-C3N4) photocatalysts based on visible-light-driven photocatalysis have been gaining broad interdisciplinary attention in the fields of solar energy conversion. In this work, we control the creation of holey-defects in g-C3N4 by using solvothermal method in tetrahydrofuran (THF) solvent for improved hydrogen evolution under simulated sunlight. The holey-defects levels by THF etching are controlled by solvothermal temperature and reaction time. The crystallographic nature and morphology structure, chemical composition, optical properties, and charge carrier transfer of resultant CN-THF samples were intensely studied by XRD, FT-IR, EA, XPS, AFM, FE-SEM, HR-TEM, UV-DRS, PL, TR-PL, EIS, PCS techniques. The resultant samples perform a colloidal dispersion in the aqueous media, which maximizing the accessible surface active sites of 2D material g-C3N4 during photocatalytic reaction. The optimized CN-THF sample draws an increased of 8.2 times higher than g-C3N4-bulk in H2 evolution rate under 1 Sun illumination of the Solar Simulator. |
