Construction of Highly Active Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub> (110)/g-C<sub>3</sub>N<sub>4</sub> System by Low Temperature Solvothermal for Efficient Degradation of Tetracycline under Visible Light
Herein, Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub> photocatalyst with (110) exposed facet was prepared by low temperature solvothermal method. On this basis, a highly efficient binary Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub>/g-C...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-10-01
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| Series: | International Journal of Molecular Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1422-0067/23/21/13221 |
| Summary: | Herein, Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub> photocatalyst with (110) exposed facet was prepared by low temperature solvothermal method. On this basis, a highly efficient binary Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub>/g-C<sub>3</sub>N<sub>4</sub> was obtained by low temperature solvothermal method and applied to the degradation of tetracycline (TC). The samples of the preparation were characterized by X-ray diffraction, scanning electron microscope, transmission electron microscope, UV–vis diffuse reflection spectroscopy, and photoluminescence spectroscopy. Furthermore, the degradation performance of photocatalysts on TC was investigated under different experimental conditions. Finally, the mechanism of Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub>/g-C<sub>3</sub>N<sub>4</sub> composite material degrading TC is discussed. The results show that Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub> and Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub>/g-C<sub>3</sub>N<sub>4</sub> photocatalysts with excellent performance could be successfully prepared at lower temperature. The Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub>/g-C<sub>3</sub>N<sub>4</sub> heterojunction photocatalyst could significantly improve the photocatalytic activity compared with g-C<sub>3</sub>N<sub>4</sub>. After 150 min of illumination, the efficiency of 80%Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub>/g-C<sub>3</sub>N<sub>4</sub> to degrade TC was 1.35 times that of g-C<sub>3</sub>N<sub>4</sub>. The improvement of photocatalytic activity was due to the formation of Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub>/g-C<sub>3</sub>N<sub>4</sub> heterojunction, which promoted the transfer of photogenerated electron–holes. The cycle experiment test confirmed that Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub>/g-C<sub>3</sub>N<sub>4</sub> composite material had excellent stability. The free radical capture experiment showed that ·O<sub>2</sub><sup>−</sup> was the primary active material. This study provides a new strategy for the preparation of photocatalysts with excellent performance at low temperature. |
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| ISSN: | 1661-6596 1422-0067 |