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 MOF sincluding dodecahedra ZIF-67, nanosheets packed Co-MOF-71, nanoplate Co-BTC, and their corresponding derivatives Co3O4 were used as sensing materials for H2S detection, respectively. The dodecahedra ZIF-67- derived dodecahedra Co3O4 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 mu g L-1 with the detection limit of 1 mu g 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 Co3O4 would be one of excellent sensing material candidates for monitoring H2S with a promising application in routine analysis. (C) 2017 Elsevier B.V. All rights reserved.