Institute of Hydrogen Eergy for Carbon Peaking and Carbon Neutralization, School of Semiconductor Science and Technology, South China Normal University, Foshan 528225, China.
School of Chemistry and Chemical Engineering, Huangpu Hydrogen Innovation Center, Guangzhou University, Guangzhou 510006, China.
Molecules. 2022 Oct 27;27(21):7292. doi: 10.3390/molecules27217292.
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 and CdInS improves the electron extraction from TiO and supports the charge transport in S-scheme. Thanks to this, the TiO/CQDs/CdInS 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 TiO/CQDs/CdInS toward photocatalysis.
利用清洁能源将危险化合物转化为高附加值化学品具有巨大的工业意义。这尤其适用于日常生活中经常释放的危险化合物。在这项工作中，通过在合成过程中合理负载碳量子点（CQDs），优化了 S 型光催化剂。作为桥梁，CQDs 在 TiO 和 CdInS 之间的存在提高了 TiO 中的电子提取，并支持 S 型中的电荷传输。由于这一点，TiO/CQDs/CdInS 在将香烟释放的多环芳烃（PAHs）转化为高附加值苯甲醛方面表现出了优异的光活性。优化后的光催化剂在模拟太阳光源下反应 1 小时，转化率为 87.79%，选择性为 72.76%，这一点通过 FT-IR 和 GC-MS 得到了证实。通过实验和理论计算的结合，证明了 CQDs 在 TiO/CQDs/CdInS 光催化中的作用。
