The pH solution is one of the critical factors affecting photo-Fenton degradation dyes in wastewater. photoactivity Prussian blue/g-C3N4 was investigated using photodegradation RhB acidic, neutral, and essential medium. results implicated that more than 98.5% removal achieved at = 3.62 after irradiation for 60 minutes under visible light. photocatalytic activity showed best performance an acidi...