Improvement in Structure and Visible Light Catalytic Performance of g-C<sub>3</sub>N<sub>4</sub> Fabricated at a Higher Temperature
oleh: Ping Ke, Danlin Zeng, Jiawei Cui, Xin Li, Yang Chen
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2022-02-01 |
Deskripsi
A highly-efficient graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) photocatalyst for visible light photodegradation of rhodamine B (RhB) and methyl orange (MO) simulating dyeing wastewater was synthesized by the thermal polycondensation of melamine. The photocatalysts were characterized by TG-DTG-DSC, XRD, EA, XPS, FT-IR, SEM, TEM, BET, PL and UV-vis DRS. The results showed that the photocatalytic performance of g-C<sub>3</sub>N<sub>4</sub> at a higher calcination temperature was significantly enhanced, and its photocatalytic activities for the photodegradation of RhB and MO were remarkably improved by 64.91% and 41.83%, respectively, which was mainly attributed to the satisfactory crystallinity, stable graphene-like structure, large surface area, and excellent optical properties. It was found that •O<sub>2</sub><sup>−</sup> radicals and •OH radicals were the main active species for the photodegradation process by the free radicals trapping experiments and ESR analysis. The photodegradation mechanism of g-C<sub>3</sub>N<sub>4</sub> was proposed predicated using the characterization results.