Degradation of Methylene Blue with a Cu(II)-Quinoline Complex Immobilized on a Silica Support as a Photo-Fenton-Like Catalyst

Teerawat Khudkham; Duangdao Channei; Bussaba Pinchaipat; Ratanon Chotima

doi:10.1021/acsomega.2c03770

Degradation of Methylene Blue with a Cu(II)-Quinoline Complex Immobilized on a Silica Support as a Photo-Fenton-Like Catalyst

ACS Omega. 2022 Sep 8;7(37):33258-33265. doi: 10.1021/acsomega.2c03770. eCollection 2022 Sep 20.

Authors

Teerawat Khudkham¹, Duangdao Channei¹, Bussaba Pinchaipat¹, Ratanon Chotima¹

Affiliation

¹ Department of Chemistry, Naresuan University, Tha Pho, Mueang Phitsanulok District, Phitsanulok 65000, Thailand.

Abstract

A Cu(II)-quinoline complex immobilized on a silica support was prepared to enhance the degradation of dyes. Mesoporous silica functionalized with this Cu(II) complex was turned into a photo-Fenton-like catalyst. Various techniques were used to characterize the resulting material, and the catalytic activity was determined by the degradation of methylene blue (MB) under UV light irradiation. The Cu(II) ion was successfully coordinated to the quinoline ligand on a silica support. The dye degradation investigation has shown that 95% of the dye was degraded in 2.5 h. The active radical species involved in the reaction were OH^• and O₂ ^•-, suggesting that a peroxo complex intermediate might be formed during degradation processes.