My spectra of V2O5-WO3/TiO2 collected under 3000ppm NO using a DRIFT-IR heating chamber have too much noises. Can I obtain better spectra by increasing the NO concentration? Is there any way of processing to eliminate noises?(except smoothing because it distorts the spectra)
By the way, is the gas phased NO stretches weak or strong? I feel like NO stretches in my spectra are so weak(almost similar to noises)that cause the spectra to appear noisy.