六价铬
铬
异质结
反应速率常数
光催化
化学
降级(电信)
化学工程
无机化学
材料科学
动力学
催化作用
物理
光电子学
有机化学
电信
量子力学
计算机科学
工程类
作者
Shi Wang,Hanpei Yang,Siyang Feng,Wei Zhang,Xudong Kang,Junpeng Yue,Mi Wu,Lina Wang,Yuankun Yang
标识
DOI:10.1016/j.cej.2023.145058
摘要
The limitation of conventional photocatalysts in simultaneously removing Tetracycline (TC), hexavalent chromium (Cr (VI)) and trivalent chromium (Cr (III)) were addressed in mixed pollution treatment. The S-scheme heterojunction of titanate nanotubes/Bi2WO6 (TNTs/BWO) was successfully constructed to achieve efficient removal of TC, Cr (VI), and Cr (III). The theoretical calculations (DFT) demonstrated that TNTs’ ion exchange properties led to the partial replacement of interlayer Na+ by Cr (III), optimizing the S-scheme heterojunction during the photocatalytic reaction. Experimental results revealed that the coexistence of TC, Cr (VI), and Cr (III) had a mutual promotion effect, as evidenced by the apparent rate constant of Cr (VI) reaching 0.7 min−1, which was 87.5 times higher than that of the single pollutant system, while maintaining a high apparent rate constant for TC. The likely intermediate products, degradation pathways, and photocatalytic mechanism were also elucidated using DFT molecular orbitals and Fukui index analysis. This work provides new insights and strategies for simultaneously removing pollutants and contributes to wastewater purification.
科研通智能强力驱动
Strongly Powered by AbleSci AI