Corroles Coated Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> MXene for Gas\nSensors

MXenes are promising materials for a wide range of technological\napplications. In gas sensing, the properties of MXene are often combined\nwith those of organic or inorganic materials to create high-performance\nsensors. In this study, the combination of corrole molecules and Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> MXene is explored.\nCorroles, akin to porphyrins, impart chemical sensitivity to MXene,\nwhile MXene’s conductivity forms the basis for developing chemiresistors.\nPrevious studies suggest that the chemical sensitivity of corroles\nis strongly dependent on the metal ion complexed at the core of the\nmacrocycle. Thus, to investigate the role of metal, we utilized a\n5,15-tolyl,10-(4-carboxyphenyl)corrole both as a free base and as\na hydroxy-Si(IV) complex. Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> MXene coated with silicon corrole and free-base\ncorrole exhibit similar responses to gases, with silicon corrole demonstrating\nthe modulation of the sensitivity respect to the free base molecule.\nThe distinctions between the two corroles are significant enough to\ndistinguish aromatic compounds from other volatile organic compounds\n(VOCs). These findings suggest that corrole-coated MXene holds promise\nas a candidate for gas sensor arrays.