Hydrothermal synthesis is one of the ways to decorate GQD with PANI with best morphology and intercalated nature which may facilitate for many applications. We can optimize the ratio, reaction time, temperature. They play a major role here for decorating. Another way electrochemical deposition or synthesis.
In recommended to Sir, K.Mahendraprabhu's answer, I would suggest the same, in addition , you can even try pyrolysis and microwave assisted pyrolysis for PANI@GQDs, for which synthesis parameters can be optimized.