Preparation of Co-CNK-OH and Its Performance in Fenton-like Photocatalytic Degradation of Tetracycline

In this study, Co-modified alkalinized g-C3N4 (named Co-CNK-OH) was prepared for the Fenton-like photocatalytic degradation of tetracycline (TC) via a simple yet effective calcination–impregnation method. all samples CNK-OH with different Co2+ loadings, Co-CNK-OH catalyst optimal content (9%) exhibited highest catalytic activity, 87.1% removal and 50% efficiency total organic carbon (TOC). Mechanism studies revealed that 9%Co-CNK-OH had lower electrical resistance after alkalization treatment modification, leading to significantly accelerated interfacial charge transfer electron acceptor as well effectively separating electrons holes. The intermediates generated during TC in photo-Fenton process were detected by HPLC-MS, which proved holes, superoxide radicals, singlet oxygen are key reactive species photocatalysis. This study provides new option wastewater.