Ultrafast Photocatalytic Detoxification of Mustard Gas Simulants by a Mesoporous Metal–Organic Framework with Dangling Porphyrin Molecules

Abstract

AbstractDeveloping effective catalysts to degrade chemical warfare agents is of great significance. Herein, a mesoporous MIL‐101(Cr) composite material dangled with porphyrin molecules (denote as TCPP@MIL‐101(Cr), TCPP = tetra(4‐carboxyphenyl)porphyrin) is reported, which can be used as a heterogeneous photocatalyst for detoxification of mustard gas simulants 2‐chloroethyl ethyl sulfide (CEES) to 2‐chloroethyl ethyl sulfoxide (CEESO) with a half‐life of 1 min. The catalytic performance of TCPP@MIL‐101(Cr) is comparable to that of homogeneous molecular porphyrin. Mechanistic studies reveal that both 1O2 and O2•− are efficiently generated and play vital roles in the oxidation reaction. Gold nanoparticles (AuNPs) are attached to the TCPP@MIL‐101(Cr) to further enhance the catalytic activity with a benchmark half‐life of 45 s, which is the fastest record so far. A medical mask loaded TCPP@MIL‐101(Cr) is fabricated for practical applications, which can selectively photoxidize CEES to CEESO under sunlight and air atmosphere, exhibiting the best degradation performance among the reported fabric‐like composite materials.