The Schottky diode can be a normal diode. This one is only 40V and it has leakage.
The 1N4007 is considered to be "slow", but in this situation the 1N4007 is really fast !
I hope you don't mind, but may I say that this circuit seems to be a political statement 
The Nano can push and pull 40mA, so you have choosen 50mA with the 100Ω resistor when VCC is 5V.
When the first P-channel mosfet is on, then 50mA is wasted for no good reason 
I don't know how noisy the motor is. Perhaps a capacitor or a RC snubber circuit over the motor is needed.