Bifunctional defect mediated direct Z-scheme g-C3N4−x/Bi2O3−yheterostructures with enhanced piezo-photocatalytic properties for efficient tooth whitening and biofilm eradication

A new, safe and effective strategy for biofilm eradication and tooth whitening is reported using the piezo-photocatalytic effect of g-C 3 N 4− x /Bi 2 O 3− y heterostructures.