g-C3N4 quantum dots (CN QDs) were first reported to modified rutile TiO2 (rTiO2).
CN QDs-rTiO2 hybrid was prepared by a simple mixed-calcination process.
CN QDs were formed in-situ during calcination of melamine.
CN QDs-rTiO2 shows enhanced photocatalytic activity in degradation of RhB and NO.
A Z-scheme degradation mechanism was proposed for CN QDs-rTiO2 hybrid.