Carbon Quantum Dots Bridged TiO<sub>2</sub>/CdIn<sub>2</sub>S<sub>4</sub> toward Photocatalytic Upgrading of Polycyclic Aromatic Hydrocarbons to Benzaldehyde
Jiangwei Zhang,
Fei Yu,
Xi Ke,
He Yu,
Peiyuan Guo,
Lei Du,
Menglong Zhang,
Dongxiang Luo
Affiliations
Jiangwei Zhang
Institute of Hydrogen Eergy for Carbon Peaking and Carbon Neutralization, School of Semiconductor Science and Technology, South China Normal University, Foshan 528225, China
Fei Yu
Institute of Hydrogen Eergy for Carbon Peaking and Carbon Neutralization, School of Semiconductor Science and Technology, South China Normal University, Foshan 528225, China
Xi Ke
Great Bay Area Branch of Aerospace Information Research Institute, Chinese Academy of Sciences, Guangzhou 510530, China
He Yu
Institute of Hydrogen Eergy for Carbon Peaking and Carbon Neutralization, School of Semiconductor Science and Technology, South China Normal University, Foshan 528225, China
Peiyuan Guo
Institute of Hydrogen Eergy for Carbon Peaking and Carbon Neutralization, School of Semiconductor Science and Technology, South China Normal University, Foshan 528225, China
Lei Du
School of Chemistry and Chemical Engineering, Huangpu Hydrogen Innovation Center, Guangzhou University, Guangzhou 510006, China
Menglong Zhang
Institute of Hydrogen Eergy for Carbon Peaking and Carbon Neutralization, School of Semiconductor Science and Technology, South China Normal University, Foshan 528225, China
Dongxiang Luo
School of Chemistry and Chemical Engineering, Huangpu Hydrogen Innovation Center, Guangzhou University, Guangzhou 510006, China
Conversion of hazardous compounds to value-added chemicals using clean energy possesses massive industrial interest. This applies especially to the hazardous compounds that are frequently released in daily life. In this work, a S-scheme photocatalyst is optimized by rational loading of carbon quantum dots (CQDs) during the synthetic process. As a bridge, the presence of CQDs between TiO2 and CdIn2S4 improves the electron extraction from TiO2 and supports the charge transport in S-scheme. Thanks to this, the TiO2/CQDs/CdIn2S4 presents outstanding photoactivity in converting the polycyclic aromatic hydrocarbons (PAHs) released by cigarette to value-added benzaldehyde. The optimized photocatalyst performs 87.79% conversion rate and 72.76% selectivity in 1 h reaction under a simulated solar source, as confirmed by FT-IR and GC-MS. A combination of experiments and theoretical calculations are conducted to demonstrate the role of CQDs in TiO2/CQDs/CdIn2S4 toward photocatalysis.
