Non Conventional Energy Sources Gd Rai
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Zhou et al.116 reported ZnO NPs with a three-dimensional inverse opal (3DIO) structure-derived from ZIF-8 followed by Pt NPs for H2S detection. As compared to conventional metal-oxides, MOFs possess high surface area and ordered pore sizes which facilitate an easy access to analyte molecules and fasten electron transport.117 The response of the Pt/ZnO 3DIO NPs was found to be 11.2 for 1 ppm H2S with a LOD of 25 ppb, excellent selectivity, and stability. The improved sensitivity of the sensor is ascribed to the spillover effect of the small Pt NPs and the unique 3DIO structure of Pt/ZnO NPs. The above results indicate that the strategy to synthesize noble-metal NP loading onto a 3DIO structure shows great potential for ppb level H2S detection. 2b1af7f3a8