A S-scheme heterojunction of MIL-125(Ti)/BiOBr for remediation of organic and inorganic pollutants coexistent real water: Application and mechanism investigation
The remediation of real wastewater consistently garners significant attention; however, the complexity of treating substrates due to the coexistence of organic and inorganic pollutants often renders treatment challenging. In response to this issue, a visible-light-driven photocatalyst, MIL-125(Ti)/B...
Saved in:
Published in | Journal of environmental chemical engineering Vol. 12; no. 3; p. 112567 |
---|---|
Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
01.06.2024
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | The remediation of real wastewater consistently garners significant attention; however, the complexity of treating substrates due to the coexistence of organic and inorganic pollutants often renders treatment challenging. In response to this issue, a visible-light-driven photocatalyst, MIL-125(Ti)/BiOBr, was meticulously designed and synthesized. This catalyst was employed to statically treat tetracycline and Cr(VI) individually across three distinct treatment models: adsorption, photocatalysis, and the synergistic combination of adsorption-photocatalysis. Through this exploration, it was determined that the adsorption-photocatalysis synergism emerged as the optimal treatment model. The MIL-125(Ti)/BiOBr system exhibited outstanding tetracycline degradation performance (100% of tetracycline can be removed after 40 min and 100% of Cr(VI) can be removed after 45 min). Then, MIL-125(Ti)/BiOBr was applied to treat tetracycline and Cr(VI) individually or simultaneously under adsorption-photocatalysis model, to confirm tetracycline and Cr(VI) didn’t interfere each other. At last, to evaluate the practical application of MIL-125(Ti)/BiOBr, it was utilized to treat three real water bodies simultaneously containing tetracycline and Cr(VI) in continuous flowing manner. The results highlight the remarkable capability of MIL-125(Ti)/BiOBr in treating wastewater containing both organic and inorganic pollutants. Mechanistic analysis revealed the establishment of an efficient S-scheme charge-carrier transfer pathway at the interface of MIL-125(Ti) and BiOBr, effectively suppressing charge carrier recombination and thereby enhancing photocatalytic performance. This study offers a novel perspective on the construction of bifunctional photocatalysts, which hold promise in addressing the challenge of intractable wastewater treatment in real-world scenarios.
[Display omitted]
•The catalyst has adsorption and photocatalysis bi-function.•S-scheme formed between MIL-125(Ti) and BiOBr boosts photocatalytic performance.•The catalyst can be well applied in flowing mode to treat real water.•The catalyst has high potential to remediate multipollutant real water. |
---|---|
ISSN: | 2213-3437 2213-3437 |
DOI: | 10.1016/j.jece.2024.112567 |