A microfluidic reactor application for the continuous-flow photocatalytic selective synthesis of aromatic aldehydes

• Type: Article in International Scientific Journal
• Date: 2020

Authors

Lima, MJ (Author) Other; Silva, Adrian (Author) FEUP; Claudia G Silva (Author) FEUP; Joaquim Luís Faria (Author) FEUP

Journal

Title: Applied Catalysis A: General

Vol. 608

ISSN: 0926-860X

Publisher: Elsevier

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Other information

Authenticus ID: P-00S-RKA

DOI: 10.1016/j.apcata.2020.117844

Abstract (EN): Benzyl alcohol and a set ofpara-substituted derivatives (-NO2, -Cl, -CH3, -OCH3 and -OH) were converted to the corresponding aldehydes in a commercial continuous-flow microfluidic reactor. Due to the dimension and the rigidity of the commercial microfluidic reactor channels, a stable suspension with few-layer graphitic carbon nitride nanoparticles (GCN-TS) was used to avoid the blockage of the photocatalyst in the channels of the reactor. Preliminary photocatalytic batch experiments revealed that different reaction yields were obtained depending on the aromatic ring activating/deactivating nature of the substituent groups. Regarding the ex-periments under continuous-flow, the highest aldehyde production was obtained for the reactions with 4-methoxybenzyl alcohol as starting molecule, corresponding to 0.19 mM at a retention time of merely 0.75 min. The results show the possibility of employing microfluidic reactors for the selective photocatalytic conversion of aromatic alcohols for both process intensification and screening applications due to the drastic decrease of reaction time.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8