MOFs-derived dodecahedra porous Co3O4: An efficient cataluminescence sensing material for H2S
In the present work, porous Co 3 O 4 was easily prepared via thermal decomposition of metal-organic frameworks (MOFs). TG, FT-IR, XRD, SEM, TEM and N 2 adsorption-desorption were employed for characterizing the synthesized products. Based on cataluminescence (CTL) transduction principle, three MOFs including dodecahedra ZIF-67, nanosheets packed Co-MOF-71, nanoplate Co-BTC, and their corresponding derivatives Co 3 O 4 were used as sensing materials for H 2 S detection, respectively. The dodecahedra ZIF-67-derived dodecahedra Co 3 O 4 with high specific surface and exposed {110} lattice planes presented superior strong CTL property, and had a good linear relation in the concentration range of 3.3–27.5 μg L −1 with the detection limit of 1 μg L −1 (S/N = 3), while the original MOFs displayed no CTL signal. Eighteen common volatile organic compounds (VOCs) were investigated as possible interference, and the results indicated that MOFs-derived porous dodecahedra Co 3 O 4 would be one of excellent sensing material candidates for monitoring H 2 S with a promising application in routine analysis.
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