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摘要
Using the polyoxometalate (PW) as a photoreduction agent, the uniform PW/reduced graphene oxide (RGO)/Ag film was fabricated via electrostatic self-assembly followed by UV reduction. Importantly, the film can be used as a surface enhanced Raman scattering probe for the selective detection of trace formaldehyde. Compared with those of the PW/RGO film and the PW/Ag film, the PW/RGO/Ag film displays the higher sensitivity, and the detection limit for formaldehyde can reach about 10(-8) mol L-1.
