Synergistic Effect of Photocatalyst CdS and Thermalcatalyst Cr2O3-Al2O3 for Selective Oxidation of Aromatic Alcohols into Corresponding Aldehydes

Sugang Meng; Susheng Chang; Shifu Chen

doi:10.1021/acsami.9b19473

Synergistic Effect of Photocatalyst CdS and Thermalcatalyst Cr₂O₃-Al₂O₃ for Selective Oxidation of Aromatic Alcohols into Corresponding Aldehydes

ACS Appl Mater Interfaces. 2020 Jan 15;12(2):2531-2538. doi: 10.1021/acsami.9b19473. Epub 2019 Dec 31.

Authors

Sugang Meng¹, Susheng Chang¹, Shifu Chen¹

Affiliation

¹ Key Lab of Clean Energy and Green Circulation , Huaibei Normal University , Huaibei , Anhui 235000 , People's Republic of China.

PMID: 31854184
DOI: 10.1021/acsami.9b19473

Abstract

Selective transformation of alcohols to corresponding aldehydes has a crucial significance under mild conditions in industrial manufacturing. Herein, a novel photothermal catalyst (Cr₂O₃-Al₂O₃)/CdS (CAO/CdS) was successfully synthesized by coupling two-dimensional Cr₂O₃-Al₂O₃ (CAO) nanosheets and one-dimensional CdS nanorods. The CAO/CdS was characterized in detail. The synergistic effect of thermal catalyst CAO and photocatalyst CdS on the transformation of aromatic alcohols into aldehydes was verified. The result exhibited that alcohols could be oxidized into corresponding aldehydes efficiently under visible light illumination due to photocatalysis of CdS and thermal catalysis of CAO. CAO can weaken the bonds of O-H and C-Hα of alcohol at low temperatures, and CdS can produce active substances (·O₂^- and h⁺) for oxidizing alcohols to aldehydes under visible light illumination. The benzaldehyde yield increased about three times. It is proposed that the work has significant theoretical and practical values in photocatalysis studies.

Keywords: CdS; photocatalysis; selective oxidation; synergistic effect; visible light-driven photocatalyst.