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Carbon Quantum Dots Bridged TiO2/CdIn2S4 toward Photocatalytic Upgrading of Polycyclic Aromatic Hydrocarbons to Benzaldehyde.

ABSTRACT: 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.

SUBMITTER: Zhang J 

PROVIDER: S-EPMC9653999 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature

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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.

Zhang Jiangwei J   Yu Fei F   Ke Xi X   Yu He H   Guo Peiyuan P   Du Lei L   Zhang Menglong M   Luo Dongxiang D  

Molecules (Basel, Switzerland) 20221027 21

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 TiO<sub>2</sub> and CdIn<sub>2</sub>S<sub>4</sub> improves the electron extraction from TiO<sub>2</sub> and suppor  ...[more]

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