Vietnam Journal of Catalysis and Adsorption

RESEARCH PAPER

open access logo 200x200Photocatalytic activities of graphitic carbon nitride based material modified by oxidation step

Vu Viet Thang1, Norbert Steinfeldt2, Ta Hong Duc1,This email address is being protected from spambots. You need JavaScript enabled to view it.

1 Hanoi University of Science and Technology, No. 1 Dai Co Viet Str., Hanoi, Vietnam
2 Leibniz Institute for Catalysis, Albert-Einstein-Straße 29a, D-18059 Rostock, Germany

ABSTRACT

The graphitic carbon nitride (g-C3N4) was synthesized from urea as precursor by pyrolysis method and oxidized by hydrogen peroxide (H2O2). The as-prepared samples were characterized by XRD, SEM, ATR-IR and UV-Vis. The characterization results revealed that there were oxygen functional groups appeared in the structure of g-C3N4 and made improvement of material’s chemical properties. The photocatalytic activities were tested with organic pollutant as methyl orange (15 mg/L) under visible light. This process was followed by UV-Vis analysis and HPLC methods. It was found out that the oxidation with H2O2 could improve the photocatalytic properties of g-C3N4 significantly, due to the impressive photogenerated electrons capture ability of oxygen functional groups on the material in the absence of oxygen.

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