I make CdS nano balls on C3N4 by hydrothermal method (C3N4 from muffle furnace). when i checked its activity its showed 50 percent degradation in 10 mints and 75 percent degradation in 20 mints and then further its activity decreased until its completely degrade 20mg/L RhB in 60 mints. and my bulk is degrading it in 70 mints smoothly. so CdS nanoballs are not stable at C3N4 kindly suggest me or guide me how i can increase the stability of CdS on C3N4?? i will be very thankful to you