Sensors for air pollution measurement

Hello there, I am new to the forum. Let me paint my scenario. Me and my friend are university students who would like to create a drone to measure air quality. It would be of course a DIY drone and as we were/are looking for ways to do that, we realized that we need 3-4 kind of sensors. We need a VOC sensor, PM 2.5 and PM 10 sensor and some gas sensors like CO and NOx sensors. I am looking forward to your help to suggest me some that would be appropriate. Our drones brain would be an Arduino and/or a Raspberry pi, so we want the sensors to be connectable to them. This would be an outside project, and a lot of sensor that we found were indoor sensors
Thank you in advance