Waste wheat straw was used as feedstock to fabricate cellulose aerogels.
Cellulose aerogels were functionalized with polypyrrole and silver nanoparticles.
The composite can kill E. coli, S. aureus and L. monocytogenes at direct contact.
Bacterial growth was effectively inhibited in the proximity of the composite.
Cellulose aerogels provide a good platform to integrate with nanomaterials.