Polyoxometalate-based single-atom catalysts for benzyl alcohol photooxidation.

REN Jing; LIU Yu; ZHAO Qiuqing; YAO Shuang; ZHANG Zhiming

Benzaldehyde (BnCHO) is a key component in dye production and a fundamental substance in the fine chemical sector, especially for making medicines and flavorings. Under ambient conditions, the synthesis of BnCHO through the photo-oxidation of benzyl alcohol (BnOH) demonstrates significant application potential in fine chemical synthesis. Herein, we anchored different metal cations (M=Fe, Co, Cu, and Zn) into monolacunary polyoxometalate (POM) [SiW11O39]8- (SiW) to form single-metal substituted-POMs (MSiWs) . Furthermore, we have successfully dispersed these POMs uniformly onto polymeric carbon nitride nanosheets (CN) . For BnOH photooxidation without adding extra oxidants such as H2O2, the FeSiW/CN-7 exhibited excellent photocatalytic performance with the conversion of BnOH nearly 69.17% and a BnCHO yield of 532.13 mmol·g-1 within 12 h. The photo-oxidation performance of BnOH is 76 and 5 times higher than that of single CN and FeSiW, respectively. This catalytic system can maintain a high catalytic efficiency after 5 cycles, indicating that FeSiW/CN possesses high catalytic stability. The results suggest that the designed POM-based single-atom catalyst FeSiW/CN is a promising candidate for the preparation of BnCHO through photooxidation under mild conditions.

BENZYL alcohol; CHEMICAL synthesis; COPPER; PHOTOOXIDATION; CHEMICAL potential

Journal of Molecular Science, 2024, Vol 40, Issue 5, p448

1000-9035

Academic Journal

10.13563/j.cnki.jmolsci.2024.05.109