Integrating an Ag 0 –Ag + mediated Ag 2 Ta 4 O 11 /Ag 8 (Nb 0.5 Ta 0.5 ) 26 O 69 heterojunction to quickly decontaminate indoor gaseous formaldehyde under indoor temperature, humidity and sunlight irradiation conditions

An (Ag 0 –Ag + )/Ag 2 Ta 4 O 11 /Ag 8 (Nb 0.5 Ta 0.5 ) 26 O 69 S-scheme heterojunction is prepared. It can decontaminate indoor HCHO from 50 to1600 ppm under natural temperature, humidity and sunlight.