Synthesis of Bi2WO6/CQDs/TiO2 composite materials with enhanced photocatalytic performance
Wang K. Han S. Liang L. Li H. Niu X. Zhang D. Fan H. Liu X.
March 2023Springer Science and Business Media Deutschland GmbH
Ionics
2023#29Issue 31245 - 1254 pp.
A ternary composite material containing TiO2, Bi2WO6, and carbon quantum dots (CQDs) was synthesized in this work. Herein, CQDs were derived from olive leaves using reflux method, and TiO2 was loaded through hydrothermal treatment. The as-prepared composite (Bi2WO6/CQDs/TiO2) showed excellent photocatalytic properties. The structure, morphology, and chemical composition of Bi2WO6/CQDs/TiO2 were characterized using XRD, SEM, TEM, and XPS. The photocatalytic performance of the composites showed it depends on the loading rate of CQDs. The highest degradation rate of RhB (92%) was achieved at 0.5% for CQDs. UV–vis DRS, photocurrent, and PL analysis results showed that, compared to Bi2WO6 and CQDs/TiO2 binary composite, the ternary composite Bi2WO6/CQDs/TiO2-0.5 exhibited better visible light response, higher photogenerated carrier separation efficiency, and consequently superior photocatalytic degradation performance.
Bi2WO6 , Carbon quantum dots , Organic pollutants , TiO2 , Visible-light photocatalyst
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School of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, China
Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou, 730050, China
Chemistry Department, Nazarbayev University, Astana, 010000, Kazakhstan
School of Petrochemical Technology
Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province
Chemistry Department
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