(a) Schematic formation of COF–CuSe nanoparticles. (b) SEM image and (c) TEM image of COF–CuSe. Temperature measurements of (d) water, COF, COF–CuSe, and CuSe aqueous solution. (e) COF–CuSe solution with different concentrations under 808 nm laser irradiation. (f) COF–CuSe solution irradiated by an 808 nm laser with different laser power densities. Reproduced from ref. 120 with permission from American Chemical Society, Copyright 2019.