Sintesis dan Karakterisasi ZnO/Co dengan Aditif Diethanolamine (DEA) dan Uji Aktivitas Katalitiknya pada Zat Warna Congo Red

Congo red is an azo dye widely used in the textile industry; however, its wastewater poses serious environmental problems because it is toxic to aquatic organisms, potentially carcinogenic, causes turbidity, and is difficult to degrade naturally. This study aimed to synthesize cobalt-doped ZnO nanoparticles with the addition of diethanolamine (DEA) as an additive to reduce the ZnO bandgap energy and to evaluate their photocatalytic activity in degrading Congo red dye. The material was synthesize