Construction of High-Activity Nano-NiTiO<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> Composite Catalysts for Enhanced Photodegradation Activities under Visible Light
oleh: Da Li, Zhan Yang, Kun Wang, Lan Zhang, Linglong Shi, Abdul Qadeer, Jiao Dong, Haoyu Ren
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2024-03-01 |
Deskripsi
Nickel titanate (NiTiO<sub>3</sub>) semiconductors and graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) have attracted great attention as photocatalysts in the degradation of environmental pollutants because of their visible-light-driven activity. But the utilizations of both semiconductors are limited by their low specific surface area. In this study, a nano-NiTiO<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> photocatalyst was successfully synthesized by optimizing the preparation method of photocatalyst precursors. Compared with the bulk g-C<sub>3</sub>N<sub>4</sub> and bulk NiTiO<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> composite photocatalysts, the nano-NiTiO<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> composite catalyst displayed a larger specific surface area, a more abundant pore size structure, and superior carrier separation capabilities. According to the pseudo-first-order, the degradation rate of MB was more than 2.5–19.7 times higher than that of previous studies. The superoxide radicals (·O<sub>2</sub><sup>−</sup>) and holes (h<sup>+</sup>) played significant roles in the photocatalytic reaction of MB. This study provides a new idea for the synthesis of photocatalysts and the improvement in photocatalytic performance.