In Situ Formation of Z-Scheme Bi<sub>2</sub>WO<sub>6</sub>/WO<sub>3</sub> Heterojunctions for Gas-Phase CO<sub>2</sub> Photoreduction with H<sub>2</sub>O by Photohydrothermal Treatment
oleh: Zekai Zhang, Ding Zhang, Lin Lyu, Guokai Cui, Hanfeng Lu
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2022-10-01 |
Deskripsi
We report a new photohydrothermal method to prepare a Bi<sub>2</sub>WO<sub>6</sub>/WO<sub>3</sub> catalytic material for CO<sub>2</sub> photoreduction by solar concentrators. The photohydrothermal treatment improves the physico-chemical properties of the Bi<sub>2</sub>WO<sub>6</sub>/WO<sub>3</sub> material and forms well contact Bi<sub>2</sub>WO<sub>6</sub>/WO<sub>3</sub> heterojunctions, which increase the maximum reaction rate of CO<sub>2</sub> photoreduction to 8.2 times under the simulated light, and the hydrocarbon yield under the real concentrating solar light achieves thousands of μmol·g<sub>cata</sub><sup>−1</sup>. The reason for the high activity is attributed to the direct Z-scheme effect of Bi<sub>2</sub>WO<sub>6</sub>/WO<sub>3</sub> heterojunctions and the photothermal effect during the course. These findings highlight the utilization of solar energy in CO<sub>2</sub> photoreduction and open avenues for the rational design of highly efficient photocatalysts.