
Scientific illustration, graphical abstract. Split layout design depicting a water treatment process using Covalent Organic Frameworks (COFs). Left: Hexagonal COF structures with varying pore sizes, highlighting a specific pore size of 5.3 nm, functionalized with TEMPO molecules. Middle: A chemical reaction occurring within the COF pore. Purple permanganate ions (MnO4-) and organic pollutant molecules (Tetracycline) are shown. Bright yellow arrows indicate electron transfer from the pollutant to TEMPO and then to permanganate, labeled 'Electron Transfer'. Right: A continuous flow water treatment column, illustrating dirty water input and clean water output. A small graph displays rapid degradation kinetics. Professional, 3D rendering style, clean background, using a scientific color palette (purple, orange, blue, grey).